Page 1 Service Handbook PUHY-P72, P96, P108, P126, P144TGMU-A PUHY-P168, P192, P204, P216, P234TGMU-A PURY-P72, P96, P108, P126, P144TGMU-A PURY-P168, P192, P204, P216, P234TGMU-A AIR CONDITIONERS CITY MULTI PUHY-P72, P96, P108, P126, P144TGMU-A Models PUHY-P168, P192, P204, P216, P234TGMU-A PURY-P72, P96, P108, P126, P144TGMU-A PURY-P168, P192, P204, P216, P234TGMU-A Service Handbook HEAD OFFICE: MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN...
Page 2 Safety Precautions Before installing the unit, thoroughly read the following safety precautions. Observe these safety precautions for your safety. WARNING This symbol is intended to alert the user to the presence of important instructions that must be followed to avoid the risk of serious injury or death.
Page 3 WARNING Securely attach the terminal block cover (panel) to the After completing the service work, check for a gas leak. unit. If leaked refrigerant is exposed to a heat source, such as a If the terminal block cover (panel) is not installed properly, fan heater, stove, or electric grill, poisonous gases may be dust and/or water may infiltrate and pose a risk of electric produced.
Page 4 Precautions for handling units for use with R410A CAUTION Do not use the existing refrigerant piping. Use a vacuum pump with a reverse-flow check valve. A large amount of chlorine that may be contained in the re- If a vacuum pump that is not equipped with a reverse-flow sidual refrigerant and refrigerating machine oil in the exist- check valve is used, the vacuum pump oil may flow into the ing piping may cause the refrigerating machine oil in the...
Page 5 Before installing the unit WARNING Do not install the unit where a gas leak may occur. When installing the unit in a hospital, take appropriate measures to reduce noise interference. If gaseous refrigerant leaks and piles up around the unit, it may be ignited.
Page 6 Before installing the unit (moving and reinstalling the unit) and performing electrical work WARNING When installing or relocating the unit, make sure that no substance other than the specified refrigerant (R410A) enters the refrigerant circuit. Any presence of foreign substance such as air can cause abnormal pressure rise or explosion.
Page 7 Before the test run CAUTION Turn on the unit at least 12 hours before the test run. Do not operate the unit without panels and safety guards. Keep the unit turned on throughout the season. If the unit is turned off in the middle of a season, it may result in malfunc- Rotating, high-temperature, or high-voltage parts on the unit tions.
Page 8: Table Of Contents
CONTENTS Read Before Servicing [1] Read Before Servicing......................3 [2] Necessary Tools and Materials ....................4 [3] Piping Materials ........................5 [4] Storage of Piping ........................7 [5] Pipe Processing........................7 [6] Brazing ........................... 8 [7] Air Tightness Test........................9 [8] Vacuum Drying (Evacuation)....................
Page 9 CONTENTS IX Troubleshooting [1] Check Code Lists........................ 235 [2] Responding to Error Display on the Remote Controller............239 [3] Investigation of Transmission Wave Shape/Noise ............. 314 [4] Troubleshooting Principal Parts..................317 [5] Refrigerant Leak ......................... 350 [6] Compressor Replacement Instructions (only P168-P234 types) ........351 [7] Collecting the Cooling Liquid from the Accumulator (Only P168-P234 types)....
Page 10 I Read Before Servicing [1] Read Before Servicing....................... 3 [2] Necessary Tools and Materials ..................4 [3] Piping Materials ......................... 5 [4] Storage of Piping ....................... 7 [5] Pipe Processing......................... 7 [6] Brazing..........................8 [7] Air Tightness Test......................9 [8] Vacuum Drying (Evacuation) ................... 10 [9] Refrigerant Charging .......................
Page 11 - 2 -...
Page 12: Read Before Servicing
[ I Read Before Servicing ] I Read Before Servicing [1] Read Before Servicing 1. Check the type of refrigerant used in the system to be serviced. Refrigerant Type CITY MULTI Y/R2: R410A 2. Check the symptoms exhibited by the unit to be serviced. Refer to this service handbook for symptoms relating to the refrigerant cycle.
Page 13: Necessary Tools And Materials
[ I Read Before Servicing ] [2] Necessary Tools and Materials Prepare the following tools and materials necessary for installing and servicing the unit. Tools for use with R410A (Adaptability of tools that are for use with R22) 1. To be used exclusively with R410A (not to be used if used with R22) Tools/Materials Notes Gauge Manifold...
Page 14: Piping Materials
[ I Read Before Servicing ] [3] Piping Materials Do not use the existing piping! New Piping Existing Piping 1. Copper pipe materials O-material (Annealed) Soft copper pipes (annealed copper pipes). They can easily be bent with hands. 1/2H-material, H-material (Drawn) Hard copper pipes (straight pipes).
Page 15 [ I Read Before Servicing ] 4. Thickness and refrigerant type indicated on the piping materials Ask the pipe manufacturer for the symbols indicated on the piping material for new refrigerant. 5. Flare processing (O-material (Annealed) only) The flare processing dimensions for the pipes that are used in the R410A system are larger than those in the R22 system. Flare processing dimensions (mm[in]) A dimension (mm[in]) Pipe size (mm[in])
Page 16: Storage Of Piping
[ I Read Before Servicing ] [4] Storage of Piping 1. Storage location Store the pipes to be used indoors. (Warehouse at site or owner's warehouse) If they are left outdoors, dust, dirt, or moisture may infiltrate and contaminate the pipe. 2.
Page 17: Brazing
[ I Read Before Servicing ] [6] Brazing No changes have been made in the brazing procedures. Perform brazing with special care to keep foreign objects (such as oxide scale, water, and dust) out of the refrigerant system. Example: Inside the brazed connection Use of oxidized solder for brazing Use of non-oxidized solder for brazing 1.
Page 18: Air Tightness Test
[ I Read Before Servicing ] [7] Air Tightness Test No changes have been made in the detection method. Note that a refrigerant leak detector for R22 will not detect an R410A leak. Halide torch R22 leakage detector 1. Items to be strictly observed Pressurize the equipment with nitrogen up to the design pressure (4.15MPa[601psi]), and then judge the equipment's air tightness, taking temperature variations into account.
Page 19: Vacuum Drying (Evacuation)
[ I Read Before Servicing ] [8] Vacuum Drying (Evacuation) (Photo1) 15010H (Photo2) 14010 Recommended vacuum gauge: ROBINAIR 14010 Thermistor Vacuum Gauge 1. Vacuum pump with a reverse-flow check valve (Photo1) To prevent the vacuum pump oil from flowing into the refrigerant circuit during power OFF or power failure, use a vacuum pump with a reverse-flow check valve.
Page 20: Refrigerant Charging
[ I Read Before Servicing ] [9] Refrigerant Charging Cylinder with a siphon Cylinder without a siphon Cylin- Cylin- Cylinder color R410A is pink. Refrigerant charging in the liquid state Valve Valve liquid liquid 1. Reasons R410A is a pseudo-azeotropic HFC blend (boiling point R32=-52°C[-62°F], R125=-49°C[-52°F]) and can almost be han- dled the same way as a single refrigerant, such as R22.
Page 21: Characteristics Of The Conventional And The New Refrigerants
[ I Read Before Servicing ] [11] Characteristics of the Conventional and the New Refrigerants 1. Chemical property As with R22, the new refrigerant (R410A) is low in toxicity and chemically stable nonflammable refrigerant. However, because the specific gravity of vapor refrigerant is greater than that of air, leaked refrigerant in a closed room will accumulate at the bottom of the room and may cause hypoxia.
Page 22: Notes On Refrigerating Machine Oil
[ I Read Before Servicing ] [12] Notes on Refrigerating Machine Oil 1. Refrigerating machine oil in the HFC refrigerant system HFC type refrigerants use a refrigerating machine oil different from that used in the R22 system. Note that the ester oil used in the system has properties that are different from commercially available ester oil. Refrigerant Refrigerating machine oil Mineral oil...
Page 23 - 14 -...
Page 24: Restrictions
II Restrictions [1] Types and Maximum allowable Length of Cables ............17 [2] Switch Settings and Address Settings ................18 [3] Sample System Connection .................... 23 [4] An Example of a System to which an MA Remote Controller is connected ....24 [5] An Example of a System to which an M-NET Remote Controller is connected ....
Page 25 - 16 -...
Page 26: Types And Maximum Allowable Length Of Cables
[ II Restrictions ] II Restrictions [1] Types and Maximum allowable Length of Cables 1. Wiring work (1) Notes 1) Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this manual. 2) Install the control cable at least 5cm[1-31/32"] away from the power supply cable to avoid noise interference. (Do not put the control cable and power supply cable in the same conduit tube.) 3) Provide class-D grounding on the outdoor unit.
Page 27: Switch Settings And Address Settings
[ II Restrictions ] 2) Remote controller wiring MA remote controller M-NET remote controller When the cable length ex- 10m [32ft] or less VCTF, VCTFK, CVV, CVS, ceeds 10m [32ft] Type VVR, VVF, VCT Shielded cable MVVS Number of 2-core cable 2-core cable Cable type cores...
Page 28 [ II Restrictions ] 2. Address settings (1) Address settings table The need for address settings and the range of address setting depend on the configuration of the system. Unit or controller Address setting Setting method range dress setting Indoor Main/sub unit 0, 01 to 50 Assign the smallest address to the main indoor unit in the...
Page 29 [ II Restrictions ] (2) Power supply switch connector connection on the outdoor unit (Factory setting: The male power supply switch connector is connected to CN41.) System configura- Connection to the Power supply unit for Group operation of Power supply switch con- tion system controller transmission lines...
Page 30 [ II Restrictions ] (6) Various start-stop controls (Indoor unit settings) Each indoor unit (or group of indoor units) can be controlled individually by setting SW 1-9 and 1-10. Setting (SW1) Operation of the indoor unit when the operation is Function resumed after the unit was stopped *2*3*4...
Page 31 [ II Restrictions ] SW4-7:OFF (Compressor ON/OFF, NIGHT MODE) CN3D 1-3P Compressor ON/OFF CN3D 1-2P NIGHT MODE Open Open Short-circuit Short-circuit SW4-7:ON (STEP DEMAND) CN3D 1-2P Open Short-circuit Open 100% (not on the on-DEMAND control) CN3D 1-3P Short-circuit Note the following steps to be taken when using the STEP DEMAND (Example) When switching from 100% to 50% (Wrong) 100%...
Page 32: Sample System Connection
[ II Restrictions ] [3] Sample System Connection Examples of typical system connection are shown on pages 24 to 52. (1) An example of a system to which an MA remote controller is connected O: Applicable, - : Non-applicable Address start Unit models System Connection to the...
Page 33: An Example Of A System To Which An Ma Remote Controller Is Connected
[ II Restrictions ] [4] An Example of a System to which an MA Remote Controller is connected 1. System with one outdoor unit (automatic address setup for both indoor and outdoor units) Sample control wiring Interlock operation with the ventilation unit In the case of Y Group Group...
Page 34 [ II Restrictions ] Wiring method/address setting method 1) Indoor/outdoor transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB3) on the outdoor unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor transmission line (TB02) on the BC con- troller (BC), and terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on each indoor unit (IC).
Page 35 [ II Restrictions ] 2. An example of a system with one outdoor unit to which 2 or more LOSSNAY units are connected (manual address setup for both indoor and outdoor units) Sample control wiring Interlock operation with the ventilation unit In the case of Y Group Group...
Page 36 [ II Restrictions ] Wiring method 1) Indoor/outdoor transmission line Same as [4] 1. [Shielded cable connection] Same as [4] 1. 2) Transmission line for centralized control No connection is required. 3) MA remote controller wiring Same as [4] 1. [When 2 remote controllers are connected to the system] Same as [4] 1.
Page 37 [ II Restrictions ] Wiring method/address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Indoor Main unit 01 to 50 Assign the smallest address to Port number setting is unit the main unit in the group. required by an R2 sys- In an R2 system with a sub BC tem.
Page 38 [ II Restrictions ] - 29 -...
Page 39 [ II Restrictions ] 3. Group operation of units in a system with multiple outdoor units Sample control wiring Interlock operation with the ventilation unit In the case of R2 In the case of Y CN41 CN40 CN41 CN40 Replace Replac e Group Group...
Page 40 [ II Restrictions ] Wiring method 1) Indoor/outdoor transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB3) on the outdoor unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor transmission line (TB02) on the BC controller (BC and BS), and terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on each indoor unit (IC).
Page 41 [ II Restrictions ] Address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Indoor Main unit 01 to 50 Assign the smallest address to the Port number setting is re- unit main unit in the group. quired by an R2 system.
Page 42 [ II Restrictions ] - 33 -...
Page 43 [ II Restrictions ] 4. An example of a system in which a system controller is connected to the transmission line for central- ized control Sample control wiring Interlock operation with the ventilation unit In the case of R2 In the case of Y CN41 CN40 CN41 CN40 Replace...
Page 44 [ II Restrictions ] Wiring method 1) Indoor/outdoor transmission line Same as [4] 3. [Shielded cable connection] Same as [4] 1. 2) Transmission line for centralized control Daisy-chain terminals M1 and M2 on the terminal block for transmission line for centralized control (TB7) on each out- door unit (OC).
Page 45 [ II Restrictions ] Address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Indoor Main unit 01 to 50 Assign the smallest address to Port number setting is unit the main unit in the group. required by an R2 sys- In an R2 system with a sub BC tem.
Page 46 [ II Restrictions ] - 37 -...
Page 47 [ II Restrictions ] 5. An example of an R2 system to which multiple BC controllers are connected (a system in which a system controller is connected to the transmission line for centralized control). Sample control wiring CN41 CN40 Replace SW2-1 OFF ON Group Group...
Page 48 [ II Restrictions ] Wiring method 1) Indoor/outdoor transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB3) on the outdoor unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor transmission line (TB02) on the main BC control- ler (BC) and the sub BC controller (BS), and terminals M1 and M2 on the terminal block for indoor-outdoor transmis- sion line (TB5) on each indoor unit (IC).
Page 49 [ II Restrictions ] Address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Indoor Main unit 01 to 50 Assign the smallest address to Port number setting is re- unit the main unit in the group. quired by an R2 system.
Page 50 [ II Restrictions ] - 41 -...
Page 51 [ II Restrictions ] 6. An example of a system in which a system controller is connected to the indoor-outdoor transmission line (except LM adapter) Sample control wiring Interlock operation with the ventilation unit In the case of Y In the case of R2 CN41 CN40 CN41 CN40 Replace...
Page 52 [ II Restrictions ] Wiring method 1) Indoor/outdoor transmission line Daisy-chain terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB3) on the outdoor unit (OC), terminals M1 and M2 of the terminal block for indoor-outdoor transmission line (TB02) on the BC con- troller (BC and BS), terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on each indoor unit (IC), and terminals M1 and M2 on the system controller.
Page 53 [ II Restrictions ] Address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Indoor Main unit 01 to 50 Assign the smallest address to Port number setting is unit the main unit in the group. required by an R2 sys- In an R2 system with a sub BC tem.
Page 54 [ II Restrictions ] - 45 -...
Page 55: An Example Of A System To Which An M-Net Remote Controller Is Connected
[ II Restrictions ] [5] An Example of a System to which an M-NET Remote Controller is connected 1. An example of a system in which a system controller is connected to the transmission line for central control Sample control wiring Interlock operation with In the case of R2 In the case of Y...
Page 56 [ II Restrictions ] Wiring method 1) Indoor/outdoor transmission line Same as [4] 3. [Shielded cable connection] Same as [4] 1. 2) Transmission line for centralized control Same as [4] 4. [Shielded cable connection] Same as [4] 3. 3) M-NET remote controller wiring Connect terminals M1 and M2 on the terminal block for indoor-outdoor transmission line (TB5) on the indoor units (IC) to appropriate terminals on the terminal block on M-NET remote controller (RC).
Page 57 [ II Restrictions ] Address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Indoor Main unit 01 to 50 Assign the smallest address to Enter the indoor unit unit the main unit in the group. group settings on the In an R2 system with a sub BC system controller...
Page 58 [ II Restrictions ] - 49 -...
Page 59: An Example Of A System To Which Both Ma Remote Controller And M-Net Remote Controller Are Connected
[ II Restrictions ] [6] An Example of a System to which both MA Remote Controller and M-NET Remote Controller are connected Sample control wiring In the case of R2 In the case of Y CN41 CN40 CN41 CN40 Replace Replace SW2-1 OFF ON Group...
Page 60 [ II Restrictions ] Wiring method/address setting method 1) Indoor/outdoor transmission line Same as [4] 3. [Shielded cable connection] Same as [4] 1. 2) Transmission line for centralized control Same as [4] 4. [Shielded cable connection] Same as [4] 3. 3) MA remote controller wiring Same as [4] 1.
Page 61 [ II Restrictions ] Wiring method/address setting method Address Facto- Unit or controller setting Setting method Notes ry set- range ting Opera- Indoor Main 01 to 50 After assigning an address to all Enter the indoor unit indoor units to be controlled group settings on the tion with unit...
Page 62: Restrictions On Pipe Length
[ II Restrictions ] [7] Restrictions on Pipe Length The refrigerant pipe from the outdoor unit is branched at the pipe end, and each branch is then connected to an indoor unit. Flare connections are used for the pipes on the indoor units and for the liquid pipes on the outdoor units. Flange connections are used for gas pipes on the outdoor units.
Page 63 [ II Restrictions ] 1. PUHY (1) Line branching Outdoor unit To downstream units Note : "Total sum of downstream unit model numbers" in the table is the sum of the model numbers of the units after point A in the figure. First branch Indoor Indoor...
Page 64 [ II Restrictions ] (2) Header branching Outdoor unit Note:Pipes from the header may not be re-branched. First branch Indoor Indoor Indoor Indoor Indoor Indoor Unit: m [ft] Allowable length of Operation Pipe sections pipes Length Total pipe length A+a+b+c+d+e+f 300 [984] or less Total pipe length (L) from the outdoor unit to the 150 [492] or less...
Page 65 [ II Restrictions ] (3) A combination of line and header branching Outdoor unit To downstream units Note : "Total sum of downstream unit model numbers" in the table is the sum of the model numbers of the units after point A in the figure. Branch header Note : Pipes from the header may not be First branch...
Page 66 [ II Restrictions ] 2. PURY (1) Line branching System that requires 16 BC controller ports or fewer Outdoor unit 110 m [360ft] or less BC controller 40 m [131ft] or less Branch joint (For use with the Y series) CMY-Y102S-G...
Page 67 [ II Restrictions ] (2) Line branching System that requires more than 16 BC controller ports or with multiple BC controllers Outdoor unit Indoor unit Indoor unit BC controller...
Page 68 [ II Restrictions ] 3. Refrigerant pipe size (1) Between outdoor unit and BC controller (Part A) Unit: mm [in] Outdoor unit Operation PURY- PURY- PURY- PURY- PURY- P72TGMU-A P96TGMU-A P108TGMU-A P126TGMU-A P144TGMU-A Refrigerant High- pipe size pressure ø15.88 [5/8"] ø19.05 [3/4"] ø22.2 [7/8"] pipe...
Page 69 [ II Restrictions ] (2) Between BC controller and indoor unit (Parts a, b, c, d, and e) Unit: mm [in] Indoor unit Operation 06,08,12,15,18 24,27,30,36,48 Refrigerant pipe Liquid ø6.35 [1/4"] ø9.52 [3/8"] size pipe ø12.7 [1/2"] ø15.88 [5/8"] ø19.05 [3/4"] ø22.2 [7/8"] pipe Connection to...
Page 70 [ II Restrictions ] 4. Connecting the BC controller (1) Size of the pipe that fits the standard BC controller ports P72-P126 models Connection: Brazed connection To outdoor unit BC controller Reducer Branch joint (Model name:CMY-Y102S-G) Junction pipe kit (Standard (Optional accessory) (Model name: supplied parts)
Page 71 [ II Restrictions ] 1) To connect P06-P18 models of indoor units use the 2) To connect P72 or P96 models of indoor units (or when the reducer that is supplied with the BC controller. total capacity of indoor units exceeds P55), use a junction pipe kit (model name: CMY-R160J) and merge the two nozzles.
Page 72 [ II Restrictions ] (2) Size of the pipe that fits the main BC controller ports P72-P234 models Branch joint (Model name:CMY-Y102S-G) (Optional accessory Connection: brazed connection for use with the Y series To outdoor unit of City Multi) Junction pipe kit Main BC controller (Model name: CMY-R160-J)
Page 73 [ II Restrictions ] (3) Size of the pipe that fits the sub BC controller ports P72-P234 models Connection: brazed connection Main BC controller Branch joint (Model name:CMY-Y102S-G) (Optional accessory Junction pipe kit Sub BC controller for use with the Y series (Model name: of City Multi) CMY-R160-J)
Page 74: Outdoor Unit / Bc Controller Components
III Outdoor Unit / BC Controller Components [1] Outdoor Unit Components and Refrigerant Circuit ............67 [2] Control Box of the Outdoor Unit..................79 [3] Outdoor Unit Circuit Board....................81 [4] BC Controller (Under the panel) ..................86 [5] Control Box of the BC Controller ..................88 [6] BC Controller Circuit Board .....................
Page 75 - 66 -...
Page 76: Outdoor Unit Components And Refrigerant Circuit
[ III Outdoor Unit / BC Controller Components ] III Outdoor Unit / BC Controller Components [1] Outdoor Unit Components and Refrigerant Circuit 1. PUHY-P72, P96 and P108 models (1) Appearance Fan guard Heat exchanger(Rear) Heat exchanger(Front) Control box - 67 -...
Page 77 [ III Outdoor Unit / BC Controller Components ] (2) Front view of a refrigerant circuit Linear expansion valve (LEV1) High-pressure check joint *1 Pressure switch Oil separator High-pressure sensor Accumulator 4-way valve Discharge muffler Low-pressure check joint *1 Gas-side ball valve *1 Low-pressure sensor Liquid-side ball valve *1...
Page 78 [ III Outdoor Unit / BC Controller Components ] 2. PUHY-P126 and P144 models (1) Appearance Fan guard Heat exchanger(Rear) Heat exchanger(Front) Control box - 69 -...
Page 79 [ III Outdoor Unit / BC Controller Components ] (2) Front view of a refrigerant circuit High-pressure check joint *1 Fusible plug Low-pressure sensor Oil separator Pressure switch High-pressure sensor 4-way valve Accumulator (21S4a) Discharge muffler 2-way valve (SV5b) Gas-side ball valve *1 4-way valve Liquid-side ball valve *1...
Page 80 [ III Outdoor Unit / BC Controller Components ] 3. PUHY-P168, P192, P204, P216 and P234 models (1) Appearance Fan guard Heat exchanger(Rear) Heat exchanger(Front) Control box - 71 -...
Page 81 [ III Outdoor Unit / BC Controller Components ] (2) Front view of a refrigerant circuit Fusible plug Low-pressure check joint *1 High-pressure 2-way valve sensor (SV5b) High-pressure check joint *1 4-way valve Accumulator (21S4a) 4-way valve Non-inverter (21S4b) compressorr Gas-side (No.2) ball valve *1...
Page 82 [ III Outdoor Unit / BC Controller Components ] 4. PURY-P72, P96 and P108 models (1) Appearance Fan guard Heat exchanger(Rear) Heat exchanger(Front) Control box - 73 -...
Page 83 [ III Outdoor Unit / BC Controller Components ] (2) Front view of a refrigerant circuit Low-pressure check joint *1 High-pressure check joint *1 Pressure switch High-pressure sensor Fusible plug Oil separator 4-way valve Accumulator Discharge muffler Check-valve block Ball valve on low pressure pipe side *1 Ball valve on high pressure pipe side *1...
Page 84 [ III Outdoor Unit / BC Controller Components ] 5. PURY-P126 and P144 models (1) Appearance Fan guard Heat exchanger(Rear) Heat exchanger(Front) Control box - 75 -...
Page 85 [ III Outdoor Unit / BC Controller Components ] (2) Front view of a refrigerant circuit High-pressure check joint *1 Fusible plug Pressure switch Accumulator High-pressure Oil separator sensor 4-way valve Discharge muffler Check-valve block Ball valve on low pressure pipe side *1 Ball valve on high pressure pipe side *1...
Page 86 [ III Outdoor Unit / BC Controller Components ] 6. PURY-P168, P192, P204, P216 and P234 models (1) Appearance Fan guard Heat exchanger(Rear) Heat exchanger(Front) Control box - 77 -...
Page 87 [ III Outdoor Unit / BC Controller Components ] (2) Front view of a refrigerant circuit 4-way valve Pressure switch Fusible plug Low-pressure check joint *1 (21S4b) High-pressure sensor 4-way valve (21S4a) Accumulator Non-inverter Check-valve compressor(No.2) block 1 Oil balance pipe Ball valve on low pressure pipe side *1 Oil separator...
Page 88: Control Box Of The Outdoor Unit
[ III Outdoor Unit / BC Controller Components ] [2] Control Box of the Outdoor Unit 1. PUHY/PURY-P72, P96, P108, P126 and P144 models (1) Under the circuit board cover ACCT-U phase ACCT-W phase DCL ... Rear DCCT Smoothing capacitor(C1) Gateamp board Electromagnetic relay(52C) In-rush current protection(R1)
Page 89 [ III Outdoor Unit / BC Controller Components ] 2. PUHY/PURY-P168, P192, P204, P216 and P234 models (1) Under the circuit board cover (right side) ACCT-U phase ACCT-W phase Overcurrent relay (51C2) Gateamp board Electromagnetic contactor (52C2) Control circuit board DCCT In-rush current protection(R1) Relay board...
Page 90: Outdoor Unit Circuit Board
[ III Outdoor Unit / BC Controller Components ] [3] Outdoor Unit Circuit Board 1. Outdoor MAIN board (1) PUHY/PURY CNRS3A CNS1 CNS2 Serial communication input from For indoor/outdoor For centralized control CN40(with power supply and output to fan inverter board transmission line (DC30V) system (DC30V) CNRS3B...
Page 91 [ III Outdoor Unit / BC Controller Components ] 2. Outdoor unit inverter board (1) PUHY/PURY LED3 charge lamp CNDC2 DC bus voltage input 1 - 3 DC 280V CN15V2 Power output for IPM control 1 - 2 DC 15V 5 - 6 DC 15V 9 - 10 DC 15V 13 - 14 DC 15V...
Page 92 [ III Outdoor Unit / BC Controller Components ] 3. Outdoor unit fan inverter board (1) PUHY/PURY CNINV CNVDC Fan motor output DC bus voltage input 1 - 3 Fuse AC 250V/15A DIP IPM CNTR (Rear) CNRS2 Serial communication input from and output to main circuit board LED2 LED1...
Page 93 [ III Outdoor Unit / BC Controller Components ] 4. RELAY BOARD (RELAY BOARD) (1) PUHY/PURY CNOUT2 CN51C2 Relay drive output 51C2 Contact input CNRT2 1 - 5 52C2,52F,CH12 Power input (AC 208/230V) 1 - 3 51C2 Detection signal output CN52C2 52C2 driving output 1 - 5 AC 208/230V...
Page 94 [ III Outdoor Unit / BC Controller Components ] 5. RELAY BOARD (RELAY02- BOARD) (1) CMB CNAC1 CNIN CH12 Power input Relay drive output - 3 AC 208/230V CNX10 CN01 CH12 Output 3 - 5 AC208/230V - 85 -...
Page 95: Bc Controller (Under The Panel)
[ III Outdoor Unit / BC Controller Components ] [4] BC Controller (Under the panel) 1. CMB-P NU-G (A) (1) Front Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) (2) Rear view LEV2 TH16 LEV3 TH11 LEV1 Gas/Liquid separator SVM2...
Page 96 [ III Outdoor Unit / BC Controller Components ] 2. CMB-P NU-GB (1) Front Liquid pipe (Indoor unit side) Gas pipe (Indoor unit side) (2) Rear view TH22 LEV3a TH25 - 87 -...
Page 97: Control Box Of The Bc Controller
[ III Outdoor Unit / BC Controller Components ] [5] Control Box of the BC Controller 1. CMB-P1016NU-GA Transformer Terminal block for power supply Terminal block for transmission line Relay board BC controller board - 88 -...
Page 98: Bc Controller Circuit Board
[ III Outdoor Unit / BC Controller Components ] [6] BC Controller Circuit Board 1. BC controller circuit board (BC board) - 89 -...
Page 99 [ III Outdoor Unit / BC Controller Components ] 2. RELAY BOARD (RELAY 4 board) 3. RELAY BOARD (RELAY 10 board) - 90 -...
Page 100: Remote Controller
IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers ........93 [2] Group Settings and Interlock Settings via the ME Remote Controller ......94 [3] Interlock Settings via the MA Remote Controller ............. 98 [4] Using the built-in Temperature Sensor on the Remote Controller......... 101 - 91 -...
Page 101 - 92 -...
Page 102: Functions And Specifications Of Ma And Me Remote Controllers
[ IV Remote Controller ] IV Remote Controller [1] Functions and Specifications of MA and ME Remote Controllers There are two types of remote controllers: M-NET (ME) remote controller, which is connected on the indoor-outdoor transmis- sion line, and MA remote controller, which is connected to each indoor unit. 1.
Page 103: Group Settings And Interlock Settings Via The Me Remote Controller
[ IV Remote Controller ] [2] Group Settings and Interlock Settings via the ME Remote Controller 1. Group settings/interlock settings Make the following settings to perform a group operation of units that are connected to different outdoor units or to manually set up the indoor/outdoor unit address.
Page 104 [ IV Remote Controller ] Repeat steps in the previous page to interlock all the indoor units in a group with the LOSSNAY unit. (C) To return to the normal display When all the group settings and interlock settings are made, take the To go back to the normal display, To search for an address, following step to go back to the normal display.
Page 105 [ IV Remote Controller ] (A) To delete group settings (B) To delete interlock settings If deletion is successfully completed, will appear in the unit type display window. If the deletion fails, will (Displayed alternately) will be displayed in the room temperature display window. appear in the unit type display - If a transmission error occurs, the selected setting will not be window.
Page 106 [ IV Remote Controller ] [Operation Procedures] 1. Press the [ON/OFF] button on the remote controller to bring the unit to a stop. The display will appear as shown in the previous page (Normal display). 2. Press buttons [CHECK] and [MODE] simultaneously for 2 seconds to go into the operation mode display selection mode under the remote controller function selection mode.
Page 107: Interlock Settings Via The Ma Remote Controller
[ IV Remote Controller ] [3] Interlock Settings via the MA Remote Controller 1. LOSSNAY interlock setting (Make this setting only when necessary.) Make this setting only when necessary. *When an upper controller is connected, make the settings on the upper controller. NOTE : To perform an interlocked operation with LOSSNAY units, interlock all the indoor units in the group with the LOSSNAY units.
Page 108 [ IV Remote Controller ] < 2. Search Procedures > To search for the LOSSNAY unit that is interlocked with a particular indoor unit, enter the address of the indoor unit into the remote controller that is connected to it. ...
Page 109 [ IV Remote Controller ] 2. Remote controller function selection via the MA remote controller (1) Remote controller function The settings for the following remote controller functions can be changed in the remote controller function selection mode. Change the settings as necessary. Category 1 Category 2 Category 3 (Setting content)
Page 110: Using The Built-In Temperature Sensor On The Remote Controller
[ IV Remote Controller ] [Setting details] [4] -3. Mode selection (1) Remote controller main/sub setting [4] -1. Language selection The language that appears on the dot display can be selected from among Press the [ ON/OFF] button to change the following setting. the following.
Page 111 - 102 -...
Page 112: Electrical Wiring Diagram
V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit ............... 105 [2] Electrical Wiring Diagram of the BC Controller.............. 109 - 103 -...
Page 113 - 104 -...
Page 114: Electrical Wiring Diagram Of The Outdoor Unit
[ V Electrical Wiring Diagram ] V Electrical Wiring Diagram [1] Electrical Wiring Diagram of the Outdoor Unit 1. Electrical wiring diagram of the outdoor unit (1) PUHY-P72, P96, 108, P126 and P144 models - 105 -...
Page 115 [ V Electrical Wiring Diagram ] (2) PUHY-P168, P192, P204, P216 and P234 models - 106 -...
Page 116 [ V Electrical Wiring Diagram ] (3) PURY-P72, P96, P108, P126 and P144 models - 107 -...
Page 117 [ V Electrical Wiring Diagram ] (4) PURY-P168, P192, P204, P216 and P234 models - 108 -...
Page 118: Electrical Wiring Diagram Of The Bc Controller
[ V Electrical Wiring Diagram ] [2] Electrical Wiring Diagram of the BC Controller (1) CMB-P104NU-G - 109 -...
Page 119 [ V Electrical Wiring Diagram ] (2) CMB-P105 and 106NU-G - 110 -...
Page 120 [ V Electrical Wiring Diagram ] (3) CMB-P108 and 1010NU-G - 111 -...
Page 121 [ V Electrical Wiring Diagram ] (4) CMB-P1013 and 1016NU-G - 112 -...
Page 122 [ V Electrical Wiring Diagram ] (5) CMB-P108 and 1010NU-GA - 113 -...
Page 123 [ V Electrical Wiring Diagram ] (6) CMB-P1013 and 1016NU-GA LEV3 LEV2 - 114 -...
Page 124 [ V Electrical Wiring Diagram ] (7) CMB-P104NU-GB - 115 -...
Page 125 [ V Electrical Wiring Diagram ] (8) CMB-P108NU-GB - 116 -...
Page 126: Refrigerant Circuit
VI Refrigerant Circuit [1] Refrigerant Circuit Figure....................119 [2] Principal Parts and Functions ..................126 - 117 -...
Page 127 - 118 -...
Page 128: Refrigerant Circuit Figure
[ VI Refrigerant Circuit ] VI Refrigerant Circuit [1] Refrigerant Circuit Figure 1. Outdoor unit (1) PUHY-P72, P96 and P108 models - 119 -...
Page 129 [ VI Refrigerant Circuit ] (2) PUHY-P126 and P144 models - 120 -...
Page 130 [ VI Refrigerant Circuit ] (3) PUHY-P168, P192, P204, P216 and P234 models - 121 -...
Page 131 [ VI Refrigerant Circuit ] (4) PURY-P72, P96, P108, P126 and P144 models - 122 -...
Page 132 [ VI Refrigerant Circuit ] (5) PURY-P168, P192, P204, P216 and P234 models - 123 -...
Page 133 [ VI Refrigerant Circuit ] 2. BC controller (1) CMB-P104, P105, P106, P108, P1010, P1013 and P1016NU-G Solenoid valves Block TH15 LEV3 TH12 HIC-B PS1 PS3 TH11 LEV1 TH16 Gas/Liquid Check valves Block Separator SVM1 (2) CMB-P108, P1010, P1013 and P1016NU-GA (main) Solenoid valves Block Gas pipe...
Page 134 [ VI Refrigerant Circuit ] (3) CMB-P104 and P108NU-GB (sub) Solenoid valves Block TH25 TH22 LEV3a Check valves Block - 125 -...
Page 135: Principal Parts And Functions
[ VI Refrigerant Circuit ] [2] Principal Parts and Functions 1. Outdoor unit (1) PUHY Part Symbols Check Notes Usage Specifications name (functions) method Compres- Adjusts the amount of circulating Low-pressure shell scroll (Comp1) refrigerant by adjusting the oper- compressor ating frequency based on the op- Wirewound resistance erating pressure data...
Page 136 [ VI Refrigerant Circuit ] Part Symbols Check Notes Usage Specifications name (functions) method Ther- TH11 TH12 is 1. Detects discharge air temper- Resis- = 7.465k mistor TH12 available ature tance = 4057 25/120 (Discharge) only on 2. Provides high-pressure pro- check P168- tection...
Page 137 [ VI Refrigerant Circuit ] Part Symbols Check Notes Usage Specifications name (functions) method Linear ex- Adjusts the amount of bypass DC12V Same as pansion (SC coil) flow from the liquid pipe on the Opening of a valve driven by a indoor LEV valve outdoor unit during cooling...
Page 138 [ VI Refrigerant Circuit ] (2) PURY Symbols Part Check (func- Notes Usage Specifications name method tions) Compres- Adjusts the amount of circulating Low-pressure shell scroll (Comp1) refrigerant by adjusting the oper- compressor ating frequency based on the op- Wirewound resistance erating pressure data 10°C [50°F] : 0.155ohm 20°C [68°F] : 0.161ohm...
Page 139 [ VI Refrigerant Circuit ] Symbols Part Check (func- Notes Usage Specifications name method tions) Ther- TH11 TH12 is 1. Detects discharge air temper- Resis- = 7.465k mistor TH12 available ature tance = 4057 25/120 (Dis- only on 2. Provides high-pressure pro- check charge) P168-P234...
Page 140 [ VI Refrigerant Circuit ] Symbols Part Check (func- Notes Usage Specifications name method tions) Solenoid 1. High/low pressure bypass at AC208/230V Continuity valve Dis- start-up and stopping, and ca- Open while being powered/ check with charge- pacity control during low-load closed while not being powered a tester suction...
Page 141 [ VI Refrigerant Circuit ] 2. Indoor unit Part Symbols Notes Usage Specifications Check method name (functions) Linear ex- 1. Adjusts superheat at the heat DC12V Refer to the sec- pansion exchanger outlet of the indoor Opening of a valve driven by tion "...
Page 142 [ VI Refrigerant Circuit ] 3. BC controller (1) G type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 63HS1 1. Detects high pressure Pressure sensor (High pres- 2. LEV control 63HS 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi]...
Page 143 [ VI Refrigerant Circuit ] (2) GA type Symbols Part Part name Usage Specifications Check method (functions) code Pressure 63HS1 1. Detects high pressure Pressure sensor (High pres- 2. LEV control 63HS 0~4.15 MPa [601psi] Vout 0.5~3.5V sure side) 1 2 3 0.071V/0.098 MPa [14psi] Pressure [MPa] Con-...
Page 144 [ VI Refrigerant Circuit ] (3) GB type Symbols Part Part name Usage Specifications Check method (functions) code Thermistor TH22 LEV control (Superheat) (Bypass = 15k outlet tem- = 3460 0/80 perature) R = 15 3460 TH25 LEV control (Superheat) 0°C[32°F] : 15kohm (Bypass in- 10°C[50°F] :9.7kohm...
Page 145 - 136 -...
Page 146: Control
VII Control [1] Functions and Factory Settings of the Dipswitches ............139 [2] Controlling the Outdoor Unit ..................148 [3] Controlling BC Controller ....................164 [4] Operation Flow Chart..................... 165 - 137 -...
Page 147 - 138 -...
Page 148: Functions And Factory Settings Of The Dipswitches
[ VII Control ] VII Control [1] Functions and Factory Settings of the Dipswitches 1. Outdoor unit (1) Main board [PUHY] Function according to switch setting Switch setting timing Switch Function Unit address setting Set to 00 or 51-100 with the dial switch Before power on For self-diagnosis/op- Refer to the LED monitor display on the...
Page 149 [ VII Control ] Function according to switch setting Switch setting timing Switch Function Emergency opera- Enabled Disabled Anytime after power on tion enabled/disabled NIGHT MODE/Step NIGHT MODE Step DEMAND Before power on DEMAND mode Unit model selection Refer to the next page Before power on Heating backup Disabled...
Page 150 [ VII Control ] [PURY] Function according to switch setting Switch setting timing Switch Function Unit address setting Set to 00 or 51-100 with the dial switch Before power on For self-diagnosis/op- Refer to the LED monitor display on the 1-10 Anytime after power on eration monitoring...
Page 151 [ VII Control ] Function according to switch setting Switch setting timing Switch Function Emergency opera- Enabled Disabled Anytime after power on tion enabled/disabled NIGHT MODE/Step NIGHT MODE Step DEMAND Before power on DEMAND mode Unit model selection Refer to the next page. Before power on Heating backup Disabled...
Page 152 [ VII Control ] (2) Compressor INV board [PUHY/PURY] Function according to switch Switch setting timing setting Switch Function Enabling/disabling the following error Error detec- Error detec- Anytime after power on detection functions; tion enabled tion disabled ACCT or DCCT sensor circuit error (530X Detail No.
Page 153 [ VII Control ] 2. Function of the switch (Indoor unit) (1) Dipswitches [SW1,3] Function according to switch setting Switch setting timing Notes Switch Function Set to ON (built-in sensor on the remote controller) Room temperature Built-in sensor on Indoor unit inlet on All Fresh (PEFY-NMHU-E-F) model units detection position the remote controller...
Page 154 [ VII Control ] [SW2] Model Capacity (model) code 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6 setting Model Capacity (model) code...
Page 155 [ VII Control ] (2) Slide switches Switch Switch Function Function according to switch setting setting tim- (PCFY-NGMU) Anytime af- Ceiling height Ceiling height ter power (High ceiling) 3.5m[11.45ft] setting (Standard-height ceiling) 2.8m[9.1ft] (Low ceiling) 2.3m[7.5ft] Ceiling height (PLFY-NAMU) Anytime af- P12-24 P30,36 setting...
Page 156 [ VII Control ] 3. Function of the switch ME remote controller (PAR-F27MEA-US) Set the address of the remote controller with the rotary switch. Rotary switch 10's digits 1's digits (left) (right) Remote controller unit Example: In case of address 108 Address setting range Setting method Main remote controller...
Page 157: Controlling The Outdoor Unit
[ VII Control ] [2] Controlling the Outdoor Unit -1- Initial Control When the power is turned on, the initial processing of the microcomputer is given top priority. During the initial processing, control processing of the operation signal is suspended. The control processing is resumed after the initial processing is completed.
Page 158 [ VII Control ] -4- Bypass Control Bypass solenoid valves (P72-P144,SV1, SV2; P168-P234,SV1, SV2, SV3), which bypass the high- and low- pressure sides, perform the following functions. (1) Bypass solenoid valve (SV1) (ON = Open) Operation At No. 1 compressor start-up or at No. 2 ON for 4 minutes.
Page 159 [ VII Control ] -5- Compressor Frequency Control Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temper- ature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.
Page 160 [ VII Control ] -6- Compressor Frequency Control Depending on the capacity required, the frequency of the compressor is controlled to keep constant evaporation temper- ature (0°C [32°F] = 0.71 MPa [103 psi]) during cooling operation, and condensing temperature (49°C [120°F] = 2.88 MPa [418 psi]) during heating operation.
Page 161 [ VII Control ] -7- Defrost Operation Control (1) Starting the defrost operation Defrost operation is started when the pipe temperature (TH5) of -10°C [14°F] or below (-8°C [18°F] or below for P126- type and above) has continuously been detected for 3 minutes after the integrated compressor operation time of 50 min- utes have passed (90 minutes when the defrost prohibit timer is set to 90 minutes).
Page 162 [ VII Control ] -8- Defrost Operation Control (1) Starting the defrost operation Defrost operation is started when the pipe temperature (TH5) of -10°C [14°F] or below (-8°C [18°F] or below for P126- type and above) has continuously been detected for 3 minutes after the integrated compressor operation time of 50 min- utes have passed (90 minutes when the defrost prohibit timer is set to 90 minutes).
Page 163 [ VII Control ] -9- Refrigerant Recovery Control Recovery of refrigerant is performed during heating operation to prevent the refrigerant from accumulating inside the unit while it is stopped (unit in fan mode), or inside the indoor unit that is in cooling mode or in heating mode with thermo off. It is also performed during cooling operation to prevent an excessive amount of refrigerant from accumulating in the outdoor heat exchanger.
Page 164 [ VII Control ] -11- Capacity Control of Outdoor Fan and Heat Exchanger (1) Control method Depending on the capacity required, the rotation speed of the outdoor unit fan is controlled by the inverter, targeting a constant evaporation temperature of (0°C [32°F]= 0.71 MPa [103 psi]) during cooling operation and constant condensing temperature of (49°C [120°F]= 2.88 MPa [418 psi]) during heating operation.
Page 165 [ VII Control ] (3) Capacity control of outdoor heat exchanger Solenoid valve Operation Operation mode pattern SV4a SV4b SV4c SV4d SV5a SV5b Cooling only Cooling main Heating only Heating main Defrost All solenoid valves are turned off while the unit is stopped. *SV5a and SV5b are available only on the P168 model and above.
Page 166 [ VII Control ] -13- Subcool Coil Control (Linear Expansion Valve ) The amount of super heat is controlled and kept constant based on the bypass outlet temperature (TH8) of subcool coil every 30 seconds. The degree of opening is controlled based on the subcool coil outlet/inlet temperature (TH5, TH7), high pressure (Pd), and discharge temperature.
Page 167 [ VII Control ] -15- Control at Initial Start-up When the unit is started for the first time, it will run the following course of operation. (1) Flow chart of initial operation mode Start of initial operation mode Step 1 Operation of No.1 compressor only P72~P144 60 Hz.
Page 168 [ VII Control ] -16- Emergency Operation Mode (P168-P234 models only) When compressors (No.1 or No.2) fails, the unit goes into the emergency operation mode to respond to the problem. The unit can be put into this mode by performing an error reset on the remote controller. (1) Starting the emergency operation 1) When an error occurs, the error source and the error code will be displayed on the display on the remote controller.
Page 169 [ VII Control ] -17- Control Method Daisy-chained Non-polar 2-wire Data signal exchange non-polar 2-wire serial communication between system equipment method transmission line 16-bit CPU Calculation, processing microcomputer operation processing System control Adjustment of refrigerant flow rate Autonomous distributed Adjustment of rotation speed of control system compressor or fan...
Page 170 [ VII Control ] -18- Cooling/heating Circuit Control and General Function of System Equipment Operation Schematic diagram of refrigerant circuit Schematic diagram of refrigerating cycle Two-phase status Liquid 4-way valve Check valve Selector valve Low- Pressure pressure Low-pressure two-phase pipe Low-pressure Liquid Cooling...
Page 171 [ VII Control ] -19- Operation Mode (1) Indoor unit operation mode The operation mode can be selected from the following 5 modes using the remote controller. Cooling mode Heating mode Dry mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling mode All indoor units in operation are in cooling mode.
Page 172 [ VII Control ] -20- Operation Mode (1) Indoor unit operation mode The operation mode can be selected from the following 6 modes using the remote controller. Cooling mode Heating mode Dry mode Automatic cooling/heating mode Fan mode Stopping mode (2) Outdoor unit operation mode Cooling only mode All indoor units in operation are in cooling mode.
Page 173: Controlling Bc Controller
[ VII Control ] [3] Controlling BC Controller 1. Control of SV A, SV B, and SV A, SV B, and SV C turn on or off depending on the operation mode of the branch. Mode Cooling Heating Stopped Defrost Port 2.
Page 174: Operation Flow Chart
[ VII Control ] [4] Operation Flow Chart 1. Mode determination flowchart (1) Indoor unit (cooling, heating, dry, fan mode) Start Normal operation Error Breaker Unit in the stopped state turned on From outdoor unit Operation SW turned on 1.
Page 175 [ VII Control ] (2) Outdoor unit (cooling and heating modes) Start Normal operation Error Breaker turned on Unit in the stopped state "HO" / "PLEASE WAIT" blinks on the remote controller *Note 1 Indoor units registered to the remote controller From indoor unit Operation command...
Page 176 [ VII Control ] 2. Operations in each mode (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat ON 3-minute restart prevention 1.
Page 177 [ VII Control ] (2) Heating operation Normal operation Defrost operation Heating operation Unit in the stopped state *Note 1,2 During test run mode Defrost operation 4-way valve ON 4-way valve OFF 1. Indoor unit fan stops Test run mode 2.
Page 178 [ VII Control ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18 C[64 F] 1. Indoor unit fan stop 1. Outdoor unit (compressor) intermittent operation 2.
Page 179 [ VII Control ] 3. Mode determination flowchart (1) Indoor unit (cooling, heating, dry and fan modes) Start Normal operation Error Breaker Stop turned on Operation SW turned on *Note 1 1. Protection function self-holding cancelled. 2. Indoor unit LEV fully closed. *Note 2 Remote controller Error mode...
Page 180 [ VII Control ] (2) Outdoor unit (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state "HO" / "PLEASE WAIT" blinks *Note 1 on the remote controller Indoor units registered to the remote controller...
Page 181 [ VII Control ] (3) BC controller (cooling only, heating only, cooling main and heating main modes) Start Normal operation Error Breaker turned on Unit in the stopped state Operation command 1. Determination of operation mode Protection function (Cooling only, Heating only, Mixture self-holding cancelled.
Page 182 [ VII Control ] 4. Operations in each mode (1) Cooling operation Cooling operation Normal operation During test run mode 4-way valve OFF Unit in the stopped state Indoor unit fan *Note 1 operation Test run mode Thermostat 3-minute restart prevention 1.
Page 183 [ VII Control ] (2) Heating operation Normal operation Heating operation Defrost operation *Note 1,2 Unit in the stopped state Defrost operation During test run mode 4-way valve ON 4-way valve OFF Test run mode 1. Indoor unit fan stop 2.
Page 184 [ VII Control ] (3) Dry operation Dry operation Normal operation Thermostat ON 4-way valve OFF Unit in the stopped state Test run mode *Note 2 Thermostat ON Suction temperature 18 C[64 F] *Note 1 1. Indoor unit fan stop 1.
Page 185 - 176 -...
Page 186: Test Run Mode
VIII Test Run Mode [1] Items to be checked before a Test Run................. 179 [2] Test Run Method ......................180 [3] Operating Characteristic and Refrigerant Amount............181 [4] Adjusting the Refrigerant Amount.................. 182 [5] Refrigerant Amount Adjust Mode................... 187 [6] The following symptoms are normal................191 [7] Standard Operation Data (Reference Data) ..............
Page 187 - 178 -...
Page 188: Items To Be Checked Before A Test Run
[ VIII Test Run Mode ] VIII Test Run Mode [1] Items to be checked before a Test Run Check for refrigerant leak and loose cables and connectors. Measure the insulation resistance between the power supply terminal block and the ground with a 500V megger and make sure it reads at least 1.0Mohm.
Page 189: Test Run Method
[ VIII Test Run Mode ] [2] Test Run Method The figure shows an MA deluxe remote controller. ON/OFF button Set Temperature buttons Down Fan Speed button TIME SUN MON TUE WED THU FRI SAT TIMER AFTER AFTER ERROR CODE FUNCTION FILTER WEEKLY...
Page 190: Operating Characteristic And Refrigerant Amount
[ VIII Test Run Mode ] [3] Operating Characteristic and Refrigerant Amount It is important to have a clear understanding of the characteristics of refrigerant and the operating characteristics of air condi- tioners before attempting to adjust the refrigerant amount in a given system. 1.
Page 191: Adjusting The Refrigerant Amount
[ VIII Test Run Mode ] [4] Adjusting the Refrigerant Amount 1. Symptoms Overcharging or undercharging of refrigerant can cause the following symptoms : Before attempting to adjust the amount of refrigerant in the system, thoroughly check the operating conditions of the system. Then, adjust the refrigerant amount by running the unit in the refrigerant amount adjust mode.
Page 192 [ VIII Test Run Mode ] 3. Amount of refrigerant to be added The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Outdoor unit model P108 P126...
Page 193 [ VIII Test Run Mode ] (2) Example: PUHY-P234TGMU-A 9.52 [3/8"](10 m [32 ft]) 15.88 [3/4"](10 m [32 ft]) 6.35 [1/4"] 9.52 [3/8"] 9.52 [3/8"] 9.52 [3/8"] 9.52 [3/8"] (10 m [32 ft]) (20 m [65 ft]) (20 m [65 ft]) (10 m [32 ft]) (10m [32 ft]) 15.88 [3/4"](30 m [98 ft])
Page 194 [ VIII Test Run Mode ] 4. Amount of refrigerant to be added The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units. The amount necessary for extended pipe (field piping) is not included and must be added on site. Outdoor unit model P108 P126...
Page 195 [ VIII Test Run Mode ] (2) Example Outdoor unit To downstream units Note : "Total sum of downstream unit model numbers" 110 m [360 ft] or less in the table is the sum of the model numbers of the units after point A in the figure. Sub BC controller (Main pipe) Main BC controller...
Page 196: Refrigerant Amount Adjust Mode
[ VIII Test Run Mode ] [5] Refrigerant Amount Adjust Mode 1. Procedures Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch switches (SW2-4) on the main board on the outdoor unit are turned to ON, the unit will go into the refrigerant amount adjust mode.
Page 197 [ VIII Test Run Mode ] Start SW2-4 ON Put all indoor units in the test run mode *Refer to the previous page for *Notes 1-4 in the chart. and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least 30 minutes since...
Page 198 [ VIII Test Run Mode ] 2. Procedures Follow the procedures below to add or extract refrigerant as necessary depending on the operation mode. When the function switch switches (SW2-4) on the main board on the outdoor unit are turned to ON, the unit will go into the refrigerant amount adjust mode.
Page 199 [ VIII Test Run Mode ] Start SW2-4 ON *Refer to the previous page for Note 1-4 in the chart . Put all indoor units in the test run mode and run the units in cooling mode. Has the initial start-up mode been completed? Has it been at least 30 minutes since start up?
Page 200: The Following Symptoms Are Normal
[ VIII Test Run Mode ] [6] The following symptoms are normal. Remote controller dis- Symptoms Cause play The indoor unit does not start "Cooling (heat- The unit cannot perform a heating (cooling) operation when other in- after starting cooling (heating) ing)"...
Page 201: Standard Operation Data (Reference Data)
[ VIII Test Run Mode ] [7] Standard Operation Data (Reference Data) 1. PUHY (1) Cooling operation Outdoor unit model Operation PUHY-P72TGMU-A PUHY-P96TGMU-A Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connected units Unit Indoor No.
Page 202 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P108TGMU-A PUHY-P126TGMU-A Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 203 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P144TGMU-A PUHY-P168TGMU-A Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 204 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P192TGMU-A PUHY-P204TGMU-A Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 205 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P216TGMU-A PUHY-P234TGMU-A Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 206 [ VIII Test Run Mode ] (2) Heating operation Outdoor unit model Operation PUHY-P72TGMU-A PUHY-P96TGMU-A Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe...
Page 207 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P108TGMU-A PUHY-P126TGMU-A Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 208 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P144TGMU-A PUHY-P168TGMU-A Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 209 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P192TGMU-A PUHY-P204TGMU-A Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 210 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P216TGMU-A PUHY-P234TGMU-A Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 211 [ VIII Test Run Mode ] 2. PUHY (1) Cooling operation Outdoor unit model Operation PUHY-P72TGMU-A PUHY-P96TGMU-A Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connected units Unit Indoor No. of units in opera- unit tion Operat-...
Page 212 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P108TGMU-A PUHY-P126TGMU-A Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 213 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P144TGMU-A PUHY-P168TGMU-A Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 214 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P192TGMU-A PUHY-P204TGMU-A Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 215 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P216TGMU-A PUHY-P234TGMU-A Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connected units Unit Indoor No. of units in opera- unit tion Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 216 [ VIII Test Run Mode ] (2) Heating operation Outdoor unit model Operation PUHY-P72TGMU-A PUHY-P96TGMU-A Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe...
Page 217 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P108TGMU-A PUHY-P126TGMU-A Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 218 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P144TGMU-A PUHY-P168TGMU-A Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 219 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P192TGMU-A PUHY-P204TGMU-A Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 220 [ VIII Test Run Mode ] Outdoor unit model Operation PUHY-P216TGMU-A PUHY-P234TGMU-A Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connected units Unit Indoor No. of units in op- unit eration Operat- ing condi- Model tions Main pipe Piping Branch pipe...
Page 221 [ VIII Test Run Mode ] 3. PURY (1) Cooling only operation Outdoor unit model Model name of BC controller Operation PURY-P72TGMU-A PURY-P96TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No.
Page 222 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P108TGMU-A PURY-P126TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connect- ed units Unit Indoor No.
Page 223 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P144TGMU-A PURY-P168TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connect- ed units Unit Indoor No.
Page 224 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P192TGMU-A PURY-P204TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connect- ed units Unit Indoor No.
Page 225 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P216TGMU-A PURY-P234TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 26.7/19.4 26.7/19.4 tempera- Outdoor 35.0/- 35.0/- ture °C No. of connect- ed units Unit Indoor No.
Page 226 [ VIII Test Run Mode ] (2) Heating only operation Outdoor unit model Model name of BC controller Operation PURY-P72TGMU-A PURY-P96TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connect- ed units Unit Indoor...
Page 227 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P108TGMU-A PURY-P126TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connect- ed units Unit Indoor No.
Page 228 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P144TGMU-A PURY-P168TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connect- ed units Unit Indoor No.
Page 229 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P192TGMU-A PURY-P204TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connect- ed units Unit Indoor No.
Page 230 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P216TGMU-A PURY-P234TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 21.1/- 21.1/- tempera- Outdoor 8.3/6.1 8.3/6.1 ture °C No. of connect- ed units Unit Indoor No.
Page 231 [ VIII Test Run Mode ] 4. PURY (1) Cooling only operation Outdoor unit model Model name of BC controller Operation PURY-P72TGMU-A PURY-P96TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F...
Page 232 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P108TGMU-A PURY-P126TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connect- ed units Unit Indoor No.
Page 233 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P144TGMU-A PURY-P168TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connect- ed units Unit Indoor No.
Page 234 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P192TGMU-A PURY-P204TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connect- ed units Unit Indoor No.
Page 235 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P216TGMU-A PURY-P234TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 80/67 80/67 tempera- Outdoor 95/- 95/- ture °F No. of connect- ed units Unit Indoor No.
Page 236 [ VIII Test Run Mode ] (2) Heating only operation Outdoor unit model Model name of BC controller Operation PURY-P72TGMU-A PURY-P96TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connect- ed units Unit Indoor...
Page 237 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P108TGMU-A PURY-P126TGMU-A CMB-P104NU-G CMB-P104NU-G Power supply 208/230 208/230 Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connect- ed units Unit Indoor No.
Page 238 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P144TGMU-A PURY-P168TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connect- ed units Unit Indoor No.
Page 239 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P192TGMU-A PURY-P204TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connect- ed units Unit Indoor No.
Page 240 [ VIII Test Run Mode ] Outdoor unit model Model name of BC controller Operation PURY-P216TGMU-A PURY-P234TGMU-A CMB-P108NU-GA CMB-P108NU-GA Power supply 208/230 208/230 Ambient Indoor 70/- 70/- tempera- Outdoor 47/43 47/43 ture °F No. of connect- ed units Unit Indoor No.
Page 241 - 232 -...
Page 242 IX Troubleshooting [1] Check Code Lists......................235 [2] Responding to Error Display on the Remote Controller..........239 [3] Investigation of Transmission Wave Shape/Noise ............314 [4] Troubleshooting Principal Parts..................317 [5] Refrigerant Leak ......................350 [6] Compressor Replacement Instructions (only P168-P234 types) ........351 [7] Collecting the Cooling Liquid from the Accumulator (Only P168-P234 types)....
Page 243 - 234 -...
Page 244: Check Code Lists
[ IX Troubleshooting ] IX Troubleshooting [1] Check Code Lists Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4300 0403 Serial communication error 4305 (Note) 0900 Test run mode 1102 1202 Abnormal discharge air temperature 1301 Abnormal low pressure...
Page 245 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code 4360 4260 4365 4265 (No er- Cooling fan abnormality (Note) ror his- tory) Suction air temperature (TH21) Temperature sensor Return of OA processing 5101 1202...
Page 246 [ IX Troubleshooting ] Searched unit Error Prelimi- (prelim- Error nary inary) Error code definition Notes Code error detail code code [115] ACCT sensor failure [116] DCCT sensor failure [117] ACCT sensor circuit failure 5301 4300 (Note) (Note) [118] DCCT sensor circuit failure [119] IPM open/Disconnected ACCT connector [120]...
Page 247 [ IX Troubleshooting ] Example Code 4225 : Bus voltage drop in the fan inverter system Code 4250 : IPM / overcurrent breaker trip in the compressor inverter system The last digit Inverter address (system) Inverter system 0 or 1 Compressor inverter system Fan inverter system - 238 -...
Page 248: Responding To Error Display On The Remote Controller
[ IX Troubleshooting ] [2] Responding to Error Display on the Remote Controller -1- PUHY 1. Mechanical system Error definition and error Error Code Cause Check method and remedy detection method 0403 Serial commu- Serial communication er- (1) Faulty wiring Check for wiring between the con- nication error ror between the main...
Page 249 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1102 Abnormal dis- 1. If the discharge tem- (1) Gas leak, gas shortage Refer to the page on refrigerant charge air tem- perature of 120°C amount evaluation.
Page 250 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1301 Abnormal low When starting the com- (1) Inner pressure drop due to Refer to the section on troubleshoot- pressure pressor from Stop Mode a leakage.
Page 251 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1302 Abnormal high (1) LEV failure on the indoor Perform a heating operation and 1. If the pressure of 3.87MPa [561psi] or higher is detect- pressure 1 unit check the operation.
Page 252 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1500 Refrigerant An error can be detected (1) Overcharged refrigerant Refer to the page on refrigerant overcharge by the discharge temper- amount evaluation. ature superheat.
Page 253 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 2502 Drain pump When the drain sensor (1) Drain pump malfunction 1) Check for drain pump malfunc- failure detects water or its tip be- (2) Clogged drain pump intake tion (The error...
Page 254 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 2503 Drain sensor When a short or an open (1) Thermistor failure Check the thermistor resistance. failure is detected during opera- (2) Connector contact failure 0°C [32°F] : 6.0 kohm tion (cannot be detected (loose connector)
Page 255 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4108 Overcurrent 1. First detection (1) Overload operation that Check the unit working condition. protection If 51C2 is started dur- exceeds unit use limit ing the operation of (2) Power supply error Check the voltage of the power sup-...
Page 256 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4220 Bus voltage If Vdc 150V or less is de- (1) Power supply environment Check whether the unit makes an instanta- neous stop when the detection result is ab- 4225 drop tected during Inverter op-...
Page 257 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4220 Logic error If only the H/W error logic In the case of 4220 Refer to 9 [4]-8-(2) [1] and replace 4225 (Detail code circuit operates, and no (1) External noise the G/A board.
Page 258 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4240 Overload pro- When the greater output (1) Short cycle of the air pas- Check that the waste heat from the 4245 tection current (Iac) than the sage outdoor unit fan is not short cycled.
Page 259 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4250 IPM error When an error signal of In the case of 4250 Same as 4230 error 4255 (Detail code IPM is detected (1) Inverter output related 101) (2) Same as 4230 error...
Page 260 [ IX Troubleshooting ] Temperature sensor failure (indoor unit) Error definition and error Error Code Cause Check method and remedy detection method 5101 Air inlet If a short or an open is (1) Thermistor failure Check the thermistor resistor. detected during thermo- (2) Connector contact failure 0°C [32°F]: 15 kohm 5102...
Page 261 [ IX Troubleshooting ] Temperature sensor failure (outdoor unit) Error definition and error Error Code Cause Check method and remedy detection method 5101 Discharge 1. When a short (high (1) Thermistor failure Check thermistor resistance. (TH1) temperature intake) or an open (low tempera- 5105 Piping (2) Pinched lead wire...
Page 262 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 5110 Heat sink fail- When a short or an open (1) THHS sensor failure Check for short circuit in THHS sen- of THHS is detected just sor.
Page 263 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 5301 ACCT sensor When an error value is (1) Compressor INV board Refer to 9 [4]-8-(2) [1] circuit failure detected with the ACCT failure "Check the compressor INV board (Detail code...
Page 264 [ IX Troubleshooting ] 2. Transmission error Error Error definition and error detec- Cause Check method and remedy Code tion method 6201 Remote controller board failure Remote controller failure Replace the remote controller. An error occurs when the data cannot be read normally from the nonvolatile memory built in on the remote controller.
Page 265 [ IX Troubleshooting ] Error Error definition and error detec- Check method and remedy Code tion method 6602 Transmission processor hard- (1) When the wiring work of or the polarity of either the indoor or outdoor trans- ware error mission line is performed or is changed while the power is on, the transmitted data will collide, the wave shape will be changed, and an error will be detect- Although "0"...
Page 266 [ IX Troubleshooting ] Error Error definition and error detec- Cause Check method and remedy Code tion method 6603 Transmission circuit bus-busy (1) The transmission processor No noise indicates that the error source cannot be transmitted as the controller is a failure. 1.
Page 267 [ IX Troubleshooting ] (1) System with one outdoor unit Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 268 [ IX Troubleshooting ] (2) Grouping of units in a system with multiple outdoor units Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission.
Page 269 [ IX Troubleshooting ] (2) Grouping of units in a system with multiple outdoor units Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission.
Page 270 [ IX Troubleshooting ] (3) System connected to the system controllers (MELANS) Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission. (eg. When the data is transmitted six times in a row with 30 seconds ued) interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller...
Page 271 [ IX Troubleshooting ] Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission. (eg. When the data is transmitted six times in a row with 30 seconds ued) interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller...
Page 272 [ IX Troubleshooting ] (3) System connected to the system controllers (MELANS) Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission. (eg. When the data is transmitted six times in a row with 30 seconds ued) interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller...
Page 273 [ IX Troubleshooting ] (4) Errors that are not limited to a particular system Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission.
Page 274 [ IX Troubleshooting ] Error Error definition and error detec- Cause Check method and remedy Code tion method 6608 No response (1) The transmission line work is 1) When an error occurs at commission- When no response command performed while the power is on, is returned although acknowl- the transmitted data will collide, Turn off the power source of the out-...
Page 275 [ IX Troubleshooting ] Error Error definition and error detec- Cause Check method and remedy Code tion method 6831 MA communication error or no (1) Contact failure of the remote 1) Check for disconnected or loose reception error controller lines of MA remote transmission lines for the indoor units Communication between the controller or the indoor unit.
Page 276 [ IX Troubleshooting ] 3. System error Error Error definition and error Error source Cause Check method and remedy Code detection method 7100 Outdoor unit Total capacity error The model total of indoor units 1) Check the model total (capacity in the system with one outdoor code total) of indoor units con- The model total of indoor...
Page 277 [ IX Troubleshooting ] Error Error definition and error Error source Cause Check method and remedy Code detection method 7102 Outdoor unit Error in the number of (1) Number of indoor units 1) Check whether the number of connected units connected to the outdoor units connected to the outdoor terminal block (TB3) for in-...
Page 278 [ IX Troubleshooting ] Error Error definition and error Error source Cause Check method and remedy Code detection method 7111 Indoor unit Remote controller sen- The remote controller without Replace the remote controller with OA processing sor failure the temperature sensor (the the one with built-in temperature unit wireless remote controller or...
Page 279 [ IX Troubleshooting ] -2- PURY 1. Mechanical system Error definition and error Error Code Cause Check method and remedy detection method 0403 Serial commu- Serial communication er- (1) Faulty wiring Check for wiring between the male nication error ror between the main connector (CNRS3B) on the main board and the INV board board and the male connector...
Page 280 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1102 Abnormal dis- 1. If the discharge tem- (1) Gas leak, gas shortage Refer to the page on refrigerant charge air tem- perature of 120 amount evaluation.
Page 281 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1301 Abnormal low When starting the com- (1) Inner pressure drop due to Refer to the section on troubleshoot- pressure pressor from Stop Mode a leakage.
Page 282 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1302 Abnormal high 1. If the pressure of (1) LEV failure on the indoor Perform a heating operation and pressure 1 3.87MPa[561psi] or unit check the operation.
Page 283 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 1302 Abnormal high If the pressure of (1) Inner pressure drop due to Refer to the page on the trouble- pressure 2 0.098MPa[14psi] or low- a leakage.
Page 284 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 2502 Drain pump When the drain sensor (1) Drain pump malfunction 1) Check for drain pump malfunction Check whether there is water in the failure detects water or its tip be- (2) Clogged drain pump intake...
Page 285 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 2503 Drain sensor When a short or an open (1) Thermistor failure Check the thermistor resistance. failure is detected during opera- (2) Connector contact failure 0°C [32°F] : 6.0 kohm tion (cannot be detected (loose connector)
Page 286 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4108 Overcurrent (1) Overload operation that Check the unit working condition. 1. First detection If 51C2 is started during protection exceeds unit use limit the operation of No.2 com- (2) Power supply error Check the voltage of the power sup-...
Page 287 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4220 Bus voltage If Vdc 150V or less is de- (1) Power supply environment Check whether the unit makes an instanta- neous stop when the detection result is ab- 4225 drop tected during Inverter op-...
Page 288 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4220 Logic error If only the H/W error logic In the case of 4220 Refer to 9 [4]-8-(2)[1]. 4225 (Detail code circuit operates, and no (1) External noise Replace the G/A board.
Page 289 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 4250 IPM error When an error signal of In the case of 4250 Same as 4230 error 4255 (Detail code IPM is detected (1) Inverter output related 111) (2) Same as 4230 error...
Page 290 [ IX Troubleshooting ] Temperature sensor failure (indoor unit) Error definition and error Error Code Cause Check method and remedy detection method 5101 Air inlet If a short or an open is (1) Thermistor failure Check the thermistor resistor. detected during thermo- (2) Connector contact failure 0°C [32°F] : 15 kohm 5102...
Page 291 [ IX Troubleshooting ] Temperature sensor failure (outdoor unit) Error definition and error Error Code Cause Check method and remedy detection method 5101 Discharge 1. When a short (high (1) Thermistor failure Check thermistor resistance. (TH11) temperature intake) or (TH12) an open (low tempera- ture intake) of the ther- 5105...
Page 292 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 5110 Heat sink fail- When a short or an open (1) THHS sensor failure Check for short circuit in THHS sen- of THHS is detected just sor.
Page 293 [ IX Troubleshooting ] High pressure sensor failure (BC controller) Error definition and error Error Code Cause Check method and remedy detection method 5201 Liquid side When the pressure of (1) High pressure sensor fail- Refer to the page on the troubleshooting of the high pressure sensor.(9 [4] -1-) 4.06MPa [589psi] or more is detected by the pressure...
Page 294 [ IX Troubleshooting ] Error definition and error Error Code Cause Check method and remedy detection method 5301 ACCT sensor When an error value is (1) Compressor INV board Refer to 9. [4].8.(2). [1] "Check the compres- sor INV board error detection circuit" circuit failure detected with the ACCT failure...
Page 295 [ IX Troubleshooting ] 2. Transmission error Error Error definition and error detec- Cause Check method and remedy Code tion method 6201 Remote controller board failure Remote controller failure Replace the remote controller. An error occurs when the data cannot be read normally from the nonvolatile memory built in on the remote controller.
Page 296 [ IX Troubleshooting ] Error Error definition and error detec- Check method and remedy Code tion method 6602 Transmission processor hard- (1) When the wiring work of or the polarity of either the indoor or outdoor trans- ware error mission line is performed or is changed while the power is on, the transmitted data will collide, the wave shape will be changed, and an error will be detect- Although "0"...
Page 297 [ IX Troubleshooting ] Error Error definition and error detec- Cause Check method and remedy Code tion method 6603 Transmission circuit bus-busy (1) The transmission processor Check transmission wave shape/noise on cannot be transmitted as the trans-mission line by following
Page 298 [ IX Troubleshooting ] (1) System with one outdoor unit Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the transmission. (eg. When the data is transmitted six times in a row with 30 seconds interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller indicates the controller which did not provide the response (ACK).
Page 299 [ IX Troubleshooting ] (2) Grouping of units in a system with multiple outdoor units Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission.
Page 300 [ IX Troubleshooting ] (2) Grouping of units in a system with multiple outdoor units Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission.
Page 301 [ IX Troubleshooting ] (3) System connected to the system controllers (MELANS) Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission. (eg. When the data is transmitted six times in a row with 30 seconds ued) interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller...
Page 302 [ IX Troubleshooting ] (3) System connected to the system controllers (MELANS) Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission. (eg. When the data is transmitted six times in a row with 30 seconds ued) interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller...
Page 303 [ IX Troubleshooting ] (3) System connected to the system controllers (MELANS) Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission. (eg. When the data is transmitted six times in a row with 30 seconds ued) interval, the error is detected on the transmission side.) Note: The address/attribute appeared on the display on the remote controller...
Page 304 [ IX Troubleshooting ] (4) Errors that are not limited to a particular system Error Code Error definition and error detection method 6607 No ACK abnormality The error is detected when no acknowledgement (ACK signal) is received after the (Contin- transmission.
Page 305 [ IX Troubleshooting ] Error Error definition and error detec- Cause Check method and remedy Code tion method 6608 No response (1) The transmission line work of 1) When an error occurs at commission- When no response command one of the indoor unit, outdoor is returned although acknowl- unit, or the BC controller is per- Turn off the power sources of the out-...
Page 306 [ IX Troubleshooting ] Error Error definition and error detec- Cause Check method and remedy Code tion method 6831 MA communication error or no (1) Contact failure of the remote 1) Check for disconnected or loose reception error controller lines of MA remote transmission lines for the indoor units Communication between the controller or the indoor unit.
Page 307 [ IX Troubleshooting ] 3. System error Error Error definition and error Error source Cause Check method and remedy Code detection method 7100 Outdoor unit Total capacity error The model total of indoor units 1) Check the model total (capacity in the system with one outdoor code total) of indoor units con- The model total of indoor...
Page 308 [ IX Troubleshooting ] Error Error definition and error Error source Cause Check method and remedy Code detection method 7102 Outdoor unit Error in the number of (1) Number of indoor units 1) Check whether the number of connected units connected to the outdoor units connected to the outdoor terminal block (TB3) for in-...
Page 309 [ IX Troubleshooting ] Error Error definition and error Error source Cause Check method and remedy Code detection method 7106 Attribute setting error MA remote controller intended To operate the OA processing unit for use with indoor units, such using remote controllers for indoor as an MA remote controller, is units, such as MA remote controller, connected to the OA process-...
Page 310 [ IX Troubleshooting ] Error Error source Check method and remedy Code 7107 BC controller For the address of the BC controller (Sub), is 50 added to Change the BC Is there a BC the smallest indoor unit address, controller controller (Sub)? which is connected to the (Sub) address.
Page 311 [ IX Troubleshooting ] 4. Troubleshooting according to the remote controller malfunction or the external input error (1) In the case of MA remote controller Phenomena Cause Check method and remedy Even if the operation button on 1. The power is not supplied to the (1) Measure voltages of the MA remote the remote controller is indoor unit.
Page 312 [ IX Troubleshooting ] Phenomena Cause Check method and remedy When the remote controller op- 1. The power for the M-NET trans- When 2. and 3. apply, check code 7102 eration SW is turned on, the mission line is not supplied from will be displayed on the self-diagnosis operation status briefly ap- the outdoor unit.
Page 313 [ IX Troubleshooting ] Phenomena Cause "HO" or "PLEASE WAIT" dis- 1. The power for the M-NET transmission line is not supplied from the outdoor unit. play on the remote controller 2. Short-circuited transmission line does not disappear, and no op- 3.
Page 314 [ IX Troubleshooting ] Flow chart Even if the operation button on the remote controller is pressed, the indoor and the outdoor units do not start running. - 305 -...
Page 315 [ IX Troubleshooting ] (2) In case of M-NET remote controller Phenomena Cause Check method and remedy Even if the operation button on 1. The power for the M-NET trans- Check voltage of the transmission terminal the remote controller is mission line is not supplied from block for of the M-NET remote controller.
Page 316 [ IX Troubleshooting ] Phenomena Cause Check method and remedy When the remote controller op- 1. The power is not supplied to the indoor unit. eration SW is turned on, a tem- The main power of the indoor unit (AC208/230V) is not on. porary operation display is The connector on the indoor unit board has come off.
Page 317 [ IX Troubleshooting ] Phenomena Cause "HO" display on the remote Without using MELANS 1. Outdoor unit address is set to "00" controller does not disappear, 2. A wrong address is set. and no operation is performed A wrong address is set to the indoor unit to be coupled with the remote controller. even if the button is pressed.
Page 318 [ IX Troubleshooting ] Phenomena Cause "88" appears on the remote An error occurs when the ad- (1) Confirm the address of unit to be cou- controller when the address is dress is registered or confirmed. pled. registered or confirmed. (common) (2) Check the connection of transmission 1.
Page 319 [ IX Troubleshooting ] (3) Both for MA remote controller and M-NET remote controller Phenomena Cause Check method and remedy Although cooling operation 1. Compressor frequency does not (1) Check pressure difference between the starts with the normal remote rise sufficiently. detected pressure by the pressure sen- controller display, the capacity Faulty detection of pressure...
Page 320 [ IX Troubleshooting ] Phenomena Cause Check method and remedy Although cooling operation 4. Long piping length Confirm that the characteristic of capacity starts with the normal remote The cooling capacity varies great- drop due to piping length. controller display, the capacity ly depending on the pressure The piping pressure loss can be assumed is not enough.
Page 321 [ IX Troubleshooting ] Phenomena Cause Check method and remedy Although heating operation 1. Compressor frequency does not (1) Check pressure difference between the starts with the normal remote rise sufficiently. detected pressure by the pressure sen- controller display, the capacity Faulty detection of pressure sor and the actual pressure with self-di- is not enough.
Page 322 [ IX Troubleshooting ] Phenomena Cause Check method and remedy Although heating operation 5. Insulation failure of the refrigerant starts with the normal remote piping controller display, the capacity 6. Long piping length Confirm that the characteristic of capacity is not enough. Excessively long piping on the drop due to piping length.
Page 323: Investigation Of Transmission Wave Shape/Noise
[ IX Troubleshooting ] [3] Investigation of Transmission Wave Shape/Noise 1. M-NET transmission Control is performed by exchanging signals between the outdoor unit and the indoor unit (M-NET remote controller) through M-NET transmission. Noise interference on the transmission line will interrupt the normal transmission, leading to errone- ous operation.
Page 324 [ IX Troubleshooting ] (3) Check method and remedy 1) Measures against noise Check the followings when noise exists on the wave or the errors described in (1) occur. Error code definition Remedy Check 1. The transmission line and the power Isolate the transmission line from the power line (5cm [1-31/ that the 208 / 230 V line are not wired too...
Page 325 [ IX Troubleshooting ] 2. MA remote controller transmission The communication between the MA remote controller and the indoor unit is performed with current tone burst. (1) Symptoms caused by noise interference on the transmission line If noise is generated on the transmission line, and the communication between the MA remote controller and the indoor unit is interrupted for 3 minutes in a row, MA transmission error (6831) will occur.
Page 326: Troubleshooting Principal Parts
[ IX Troubleshooting ] [4] Troubleshooting Principal Parts -1- High-Pressure Sensor (63HS) 1. Compare the pressure that is detected by the high pressure sensor, and the high-pressure gauge pres- sure to check for failure. Set the digital display switch (SW1) as shown below to display the pressure that is detected by the high pressure sensor on the light emitting diode 1 2 3 4 5 6 7 8 9 10 (1) While the sensor is stopped, compare the gauge pressure and the pressure displayed on self-diagnosis LED1.
Page 327 [ IX Troubleshooting ] -2- Low-Pressure Sensor (63LS) 1. Compare the pressure that is detected by the low pressure sensor, and the low pressure gauge pressure to check for failure. Set the digital display switch (SW1) as shown below to display the pressure that is detected by the low pressure sensor on the self-diagnosis LED.
Page 328 [ IX Troubleshooting ] -3- Solenoid Valve Check whether the output signal from the control board and the operation of the solenoid valve match. Setting the self-diagnosis switch (SW1) as shown in the figure below causes the ON signal of each relay to be output to the LED's.
Page 329 [ IX Troubleshooting ] (4) In the case of SV2 (Bypass valve) (applicable to the PURY series only) This solenoid valve opens when powered (Relay ON). In the case of heating-only or heating-main, the valve turns on when the low pressure (LPS) becomes 0.25MPa [36psi] or less 5 minutes after the compressor starts.
Page 330 [ IX Troubleshooting ] Refrigerant Circuit Figure (P72 ~ P144 models) SV4a SV4b SV4c Solenoid Valves Block SV4d SV4d SV4b SV4a Valve SV4c HEXb1 HEXf3 HEXf2 CV7a HEXf1 Solenoid valve block ST14 ST15 ST16 ST17 CV9a CV5a CV10a CV3a CV4a CV8a CV6a CV2a...
Page 331 [ IX Troubleshooting ] Solenoid valve block 1 Refrigerant Circuit Figure (P168 ~ P234 models) Solenoid Valves Block 2 SV5a CV7b SV5b Solenoid Valves Block 1 Valve SV4d HEXb2 HEXf4 SV4b SV4a SV4c HEXb1 HEXf3 Solenoid valve block 2 ST18 ST19 HEXf2 CV7a...
Page 332 [ IX Troubleshooting ] -4- Outdoor Unit Fan To check the revolution of the fan, check the inverter output state on the self-diagnosis LED, as the inverter on the outdoor fan controls the revolutions of the fan.The revolution of the fan is approximately 600rpm at full speed. When starting the fan, the fan runs at full speed for 5 seconds.
Page 333 [ IX Troubleshooting ] -5- Check Valve Block (applicable to the PURY series only) By turning on or off SV4a-4d, 5a, and 5b on and off, the refrigerant flows through , and . Check the LED monitor. Valve plug A, B, and C can be removed with 3 kinds of hex wrenches. Refrigerant Circuit Figure (P72 ~ P144 models) Refrigerant flow in the cooling cycle Refrigerant flow in the heating cycle...
Page 334 [ IX Troubleshooting ] -6- LEV LEV operation The LEV receives pulse signal from the board and the valve is driven by the stepping motor. (1) Indoor LEV and BC controller LEV The valve opening changes according to the number of pulses. Control board Intermediate connector DC 12V...
Page 335 [ IX Troubleshooting ] (2) Outdoor LEV (applicable to the PUHY series only) The valve opening changes according to the number of pulses. Outdoor MAIN board DC 12V Brown Drive circuit Blue Orange...
Page 336 [ IX Troubleshooting ] (3) Judgment methods and possible failure mode Note: The specifications of the outdoor unit (outdoor LEV) and the indoor unit (indoor LEV) differ.Therefore, remedies for each failure may vary. Check the remedy specified for the appropriate LEV as indicated in the right column. Malfunction Judgment method Remedy...
Page 337 [ IX Troubleshooting ] (4) Outdoor LEV coil removal procedure (applicable to the PUHY series only) LEV component As shown in the figure, the outdoor LEV is made in such a way that the coils and the body can be separated. Body Coils Stopper...
Page 338 [ IX Troubleshooting ] -7- Troubleshooting Principal Parts of BC Controller 1. Pressure sensor Troubleshooting flow chart for pressure sensor START Note 1 Check whether the pressure sensor or the connectors of P1 and P3 are not disconnected, not loose, or not connected wrongly. Repair the fault.
Page 339 [ IX Troubleshooting ] Note1 BC controller: Phenomena when the pressure sensor is connected wrongly (reverse connection of P1 and P3) to the board. Symptoms Cooling-only Cooling-main Heating only Heating main Non-cooling Indoor heating SC small Normal Non-cooling SC11 large SC11 large SC11 large Indoor heating SC small...
Page 340 [ IX Troubleshooting ] 2. Temperature sensor Troubleshooting instructions for thermistor START Note 1 Pull out the thermistor connector in trouble from the board. Note 2 Measure the temperature of the thermistor in trouble. (actual measurement value) Note 3 Check the thermistor resistor. Compare the temperature corresponding to the resistance measured by the thermistor and the temperature measured by a commercially...
Page 341 [ IX Troubleshooting ] Note1 For the connectors on the board, TH11 and TH12 are connected to CN10, and TH15 and TH16 are connected to CN11. Disconnect the connector in trouble, and check the sensor of each number. Note 2, 3 1) Pull out the sensor connector from the I/O board Do not pull the sensor by holding the lead wire.
Page 342 [ IX Troubleshooting ] 3. Troubleshooting flow chart for LEV Solenoid valve (1) LEV No cooling capacity No heating capacity Note 1 Check whether the electric expansion valve and the solenoid valve connector are not disconnected or not loose. Fault is found. Repair the fault.
Page 343 [ IX Troubleshooting ] Note1 BC controller: Phenomena when LEV is connected wrongly (reverse connection of LEV1 and LEV3) to the board. Phenomena Cooling-only Cooling-main Heating only Heating main Non-cooling Non-cooling and non-heat- Indoor heating SC small Non-cooling SH12 small, SC11 small PHM large Indoor heating SC small SH16 small, branch pipe...
Page 344 [ IX Troubleshooting ] Self-diagnosis LED Measurement data Symbol SW1 setting value 1 2 3 4 5 6 7 8 9 10 LEV1 opening 1 2 3 4 5 6 7 8 9 10 LEV2 opening NU-G GA 1 2 3 4 5 6 7 8 9 10 LEV3 opening (Standard / main)
Page 345 [ IX Troubleshooting ] Troubleshooting flow chart for solenoid Troubleshooting flow chart for solenoid valve body Start Check for pins not fully inserted on the connector and check the colors of the lead wires visually. Intermediate connector Control board When LEV is fully closed : tick sound When LEV is fully open : no sound Brown Brown...
Page 346 [ IX Troubleshooting ] (2) Solenoid valve (SVA, SVB, SVC) Faulty judgment of solenoid valve Stop the operation of the applied BC remote controller system. Stop the operation Check whether the wire to the solenoid valve is not connected wrongly, or the connector is not loose. No fault Repair the fault.
Page 347 [ IX Troubleshooting ] Check whether the BC board output signal corresponds with the solenoid valve operation correspond. Note1 SVA, SVB, SVC SVA, SVB, and SVC turn on or off according to the indoor unit operation mode. Mode Cooling Heating Stopped Defrost Port...
Page 348 [ IX Troubleshooting ] -8- Inverter Replace only the compressor if only the compressor is found to be defective. Overcurrent will flow through the inverter if the compressor is damaged, however, the power supply is automatically cut when overcurrent is detected, protecting the inverter from damage.
Page 349 [ IX Troubleshooting ] Note: 1. Due to a large capacity electrolytic capacitor used in the inverter, voltage still flows through even after the unit is turned off, which may cause electric shock.As a result, wait for a sufficient length of time (5~10 minutes) after the main power is turned off, and check the voltage drop at both terminals of the electrolytic condensers.
Page 350 [ IX Troubleshooting ] Items to be checked Phenomena Remedy Perform the following: 1) IPM/overcurrent breaker Refer to item [5] for inverter circuit Check whether (1) Reconnect the connector trip trouble. the inverter is that was removed in section (4250 Detail code No. damaged.
Page 351 [ IX Troubleshooting ] Items to be checked Phenomena Remedy Check whether the IPM screw 1) Terminal screws are Check for loose IPM terminal Check the in- terminal is not loose. loose. screws and tighten them. verter circuit Check the exterior of the IPM. 2) IPM is cracked due to Replace the IPM.
Page 352 [ IX Troubleshooting ] (3) Trouble treatment when the main power breaker is tripped. Items to be checked Phenomena Remedy Perform Meg check between the Zero to several ohm, or Meg failure Check each part in the main inverter cir- terminals on the power terminal cuit.
Page 353 [ IX Troubleshooting ] (4) Simple checking procedure for individual components of main inverter circuit Before checking, turn the power off and remove the parts to be checked from the control box. Part name Judgment method Diode stack Refer to "Diode stack" ( 9.[4].5.(6) ) IPM (Intelligent power Refer to "Intelligent power module (IPM)"...
Page 354 [ IX Troubleshooting ] (5) Intelligent power module (IPM) Measure resistances between each pair of terminals on the IPM with a tester, and use the results for troubleshooting. Notes on measurement Check the polarity before measuring. (On the tester, black normally indicates plus.) Check that the resistance is not open ( ohm) or not shorted (to 0 ohm).
Page 355 [ IX Troubleshooting ] (6) Diode stack Measure resistances between each pair of terminals on the diode stack with a tester, and use the results for troubleshoot- ing.Refer to (5) " Intelligent power module (IPM) " for notes on measurement and tester selection. Judgment value (reference) Black ( + ) External view...
Page 356 [ IX Troubleshooting ] -9- Control Circuit (1) Control power source function block P72 - P144 models Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) AC 208 / 230 V TB1 Terminal block for Rectifier 52C1 Inverter...
Page 357 [ IX Troubleshooting ] P168 - P234 models Power source system (AC 208 / 230 V) Control system (DC 5 ~ 30 V) 51C2 Fuse (63 A) 52C2 No.2 Compressor AC 208 / 230 V TB1 Terminal block for Rectifier Noise filter 52C1 Smoothing capacitor...
Page 358 [ IX Troubleshooting ] (2) Troubleshooting transmission power circuit of outdoor unit Check the voltage at the indoor/outdoor transmission terminal block (TB3) of outdoor unit. DC 24 ~ 30 V Check whether the transmission line is disconnected, check for contact failure, and repair the problem. Check the voltage at TB3 after removing transmission line from TB3.
Page 359: Refrigerant Leak
[ IX Troubleshooting ] [5] Refrigerant Leak 1. Leak spot: In the case of extension pipe for indoor unit (Cooling season) 1) Mount a pressure gauge on the service check joint (CJ2) on the low-pressure side. 2) Stop all the indoor units, and close the liquid ball valve (BV2) inside the outdoor unit while the compressor is being stopped.
Page 360: Compressor Replacement Instructions (Only P168-P234 Types)
[ IX Troubleshooting ] 10) To adjust refrigerant amount, open the ball valves (BV1 and BV2) inside the outdoor unit. Note : When the power to the outdoor/indoor unit must be turned off to repair the leak after closing the ball valves specified in the item 5, turn the power off in approximately one hour after the outdoor/indoor units stop.
Page 361 [ IX Troubleshooting ] 1) Check that the main power is OFF. When replacing the compressor due to megger failure and when the megger is 1M ohm or more, megger drop is likely due to the liquified refrigerant entering and accumulating in the compressor. Turn the power off after powering the crankcase heater at least 12 hours, and apply megger again.
Page 362: Collecting The Cooling Liquid From The Accumulator (Only P168-P234 Types)
[ IX Troubleshooting ] No.1 Compressor Soundproof material No. 2 compressor Oil balance pipe joint Drain oil plug Metal fitting 1 Flare nut Oil-equalizing pipe Flare Nut Metal fitting 2 Check joint for draining liquid [7] Collecting the Cooling Liquid from the Accumulator (Only P168-P234 types) 1) Perform evacuation inside the recovery cylinder.
Page 363: Servicing The Bc Controller
[ IX Troubleshooting ] [8] Servicing the BC controller (1) Service panel *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure 1. Remove 2 lock nuts on the control box, loosen 2 lock nuts, and remove the control box. 2.
Page 364 [ IX Troubleshooting ] (3) Thermistor (liquid pipe/gas pipe temperature detection) *Special care must be taken when replacing heavy parts. Work procedure Explanatory figure 1. Remove the service panel. (1) For TH11, TH12, and TH15, refer to (1)-1.2. (2) For TH16, refer to (1)-1.2.3. 2.
Page 365 [ IX Troubleshooting ] (5) LEV Work procedure Explanatory figure 1. Remove the service panel.(Refer to (1)-1.2.3.) 2. Replace the LEV in trouble. LEV2 TH16 Note: Secure enough service space in the ceiling for TH11 welding operation, and conduct the work carefully.If LEV3 required, dismount the unit from the ceiling, and conduct the work.
Page 366 [ IX Troubleshooting ] - 357 -...
Page 367 - 358 -...
Page 368 X LED monitor display on the outdoor unit board [1] How to read the LED on the service monitor ..............361 - 359 -...
Page 369 - 360 -...
Page 370: Xled Monitor Display On The Outdoor Unit Board
[ X LED monitor display on the outdoor unit board ] X LED monitor display on the outdoor unit board [1] How to read the LED on the service monitor 1. How to read the LED By setting the DIP SW 1-1 through 1-10 (Switch number 10 is represented by 0), the operating condition of the unit can be monitored on the service monitor.
Page 371 [ X LED monitor display on the outdoor unit board ] 3. Time data storage function The outdoor unit has a simple clock function that enables the unit to calculate the current time with an internal timer by re- ceiving the time set by the system controller, such as G50. If an error (including a preliminary error) occurs, the error history data and the error detection time are stored into the ser- vice memory.
Page 372 [ X LED monitor display on the outdoor unit board ] 4. Table of LED Codes LED monitor display Display Item Remarks 1234567890 Relay out- Comp in Comp 1 Comp 2 LD8 stays lit at Always put display 1 opera- in oper- in oper- 52C1...
Page 373 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 Indoor unit Unit No. Unit No. Unit No. Unit No. Unit No. Unit No. Unit No. Unit No. The lamp that 0000100000 check corresponds to the unit that Unit No.
Page 374 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0011010000 1011010000 TH11 -99.9 to 999.9 The unit is [°C] or [°F] 0111010000 TH12 -99.9 to 999.9 1111010000 0000110000 -99.9 to 999.9 1000110000 -99.9 to 999.9 0100110000 -99.9 to 999.9 *TH8...
Page 375 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 × Qj 0111001000 × Qjc + 0000 to 9999 × Qjh) 1111001000 × Qjc 0000 to 9999 0000101000 × Qjh 0000 to 9999 1000101000 Target Tc -99.9 to 999.9 The unit is [°C] or [°F]...
Page 376 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 COMP 1 op- Peak value 0011011000 eration cur- -99.9 to 999.9 [ A ] rent (DC) 1011011000 0111011000 COMP 1 bus The unit is 1111011000 0000 to 9999 voltage [ V ]...
Page 377 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 1000000100 0100000100 1100000100 0010000100 Relay out- SVM1 SVM2 Items from No. put display 132 to No. 167 1010000100 SVA1 SVB1 SVC1 SVA2 SVB2 SVC2 are applicable to (Main con- the PURY se- 0110000100...
Page 378 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 BC control- The unit is ler (Main [kgf/cm ] or controller or [psi] 1001100100 -99.9 to 999.9 standard controller) 63HS1 BC control- ler (Main controller or 0101100100 -99.9 to 999.9 standard...
Page 379 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 BC control- The unit is ler (Sub con- [°C] or [°F] 0010010100 -99.9 to 999.9 troller 2) TH22 BC control- ler (Sub con- 1010010100 -99.9 to 999.9 troller 2) TH25 BC control-...
Page 380 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 Error history Address and er- 0111110100 0000 to 9999 ror codes high- lighted Error details If no errors are 1111110100 Error details of inverter (0001-0120) of inverter detected, "---- "...
Page 381 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0100101100 Relay out- Comp in Comp 1 Comp 2 Items marked Always 1100101100 put display 1 opera- in oper- in oper- 52C1 52C2 with * are only Lighting tion ation...
Page 382 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 High-pres- The unit is 1100111100 sure sensor -99.9 to 999.9 [kgf/cm ] or data [psi] Low-pres- 0010111100 sure sensor -99.9 to 999.9 data 1010111100 0110111100 1110111100 0001111100 ×...
Page 383 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 Number of 1111000010 fans in oper- 0000 to 9999 ation 0000100010 1000100010 0100100010 1100100010 0010100010 1010100010 0110100010 COMP 1 op- Peak value eration cur- [ A ] 1110100010 -99.9 to 999.9 rent...
Page 384 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 COMP 1 Count-up at number of start-up start-stop The unit is 1110010010 0000 to 9999 events [Time] Lower 4 dig- COMP 2 number of start-stop 0001010010 0000 to 9999 events...
Page 385 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 BC control- The unit is ler (Main [°C] or controller or [°F] Items No. 0100001010 -99.9 to 999.9 standard 320 through No. controller) 325 and No. 330 TH15 through No.
Page 386 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 BC control- LEV 3a opening ler (Sub con- (Fully open: 1000101010 0000 to 2000 troller 2) 2000) LEV3a BC control- LEV 2 opening ler (Main (Fully open: controller or 2000)
Page 387 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC12 Displayed alter- 0101011010 Address/ca- 0000 to 9999 0000 to 9999 nately every 5 pacity code seconds IC13 1101011010 Address/ca- 0000 to 9999 0000 to 9999 pacity code IC14 0011011010...
Page 388 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC32 Displayed alter- 0111111010 Address/ca- 0000 to 9999 0000 to 9999 nately every 5 pacity code seconds 1111111010 0000000110 1000000110 0100000110 1100000110 0010000110 1010000110 0110000110 1110000110 0001000110 1001000110...
Page 389 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC10 Suction The unit is 1000010110 -99.9 to 999.9 temperature [°C] or [°F] IC11 Suction 0100010110 -99.9 to 999.9 temperature IC12 Suction 1100010110 -99.9 to 999.9 temperature IC13 Suction 0010010110...
Page 390 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0111110110 1111110110 0000001110 1000001110 0100001110 1100001110 0010001110 1010001110 0110001110 1110001110 0001001110 1001001110 The unit is 0101001110 Liquid pipe -99.9 to 999.9 [°C] or [°F] temperature 1101001110 Liquid pipe -99.9 to 999.9...
Page 391 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC14 The unit is 1110101110 Liquid pipe -99.9 to 999.9 [°C] or [°F] temperature IC15 0001101110 Liquid pipe -99.9 to 999.9 temperature IC16 1001101110 Liquid pipe -99.9 to 999.9 temperature IC17...
Page 392 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0101011110 1101011110 0011011110 1011011110 0111011110 1111011110 0000111110 1000111110 0100111110 1100111110 0010111110 1010111110 0110111110 1110111110 0001111110 1001111110 0101111110 1101111110 0011111110 1011111110 0111111110 1111111110 0000000001 Self-address Alternate display of self address and unit model IC/FU ad- 1000000001 Count-up display of number of connected units...
Page 393 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 The unit is 1011000001 Gas pipe -99.9 to 999.9 [°C] or [°F] temperature 0111000001 Gas pipe -99.9 to 999.9 temperature 1111000001 Gas pipe -99.9 to 999.9 temperature 0000100001 Gas pipe...
Page 394 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC22 The unit is 0000010001 Gas pipe -99.9 to 999.9 [°C] or [°F] temperature IC23 1000010001 Gas pipe -99.9 to 999.9 temperature IC24 0100010001 Gas pipe -99.9 to 999.9 temperature IC25...
Page 395 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 1101110001 0011110001 1011110001 IC1SH -99.9 to 999.9 The unit is [ deg°C ] or IC2SH 0111110001 -99.9 to 999.9 [ deg°F ] 1111110001 IC3SH -99.9 to 999.9 0000001001 IC4SH -99.9 to 999.9...
Page 396 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0100011001 1100011001 0010011001 1010011001 0110011001 1110011001 0001011001 1001011001 0101011001 1101011001 0011011001 1011011001 0111011001 1111011001 IC1SC -99.9 to 999.9 The unit is [ deg°C ] or IC2SC 0000111001 -99.9 to 999.9...
Page 397 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 1001000101 IC27SC -99.9 to 999.9 The unit is [ deg°C ] or IC28SC 0101000101 -99.9 to 999.9 [ deg°F ] 1101000101 IC29SC -99.9 to 999.9 0011000101 IC30SC -99.9 to 999.9...
Page 398 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0111010101 1111010101 0000110101 Current time 00:00 to 23:59 Hour: minute Current time Year and month, 1000110101 00.00 to 99.12 / 1 to 31 and date alter- nate display Time of error Hour: minute...
Page 399 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 Time of last Hour: minute 0110001101 data backup 00:00 to 23:59 before error Time of last Year and month, data backup and date alter- 1110001101 00.00 to 99.12 / 1 to 31 before error nate display...
Page 400 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC25 LEV Fully open: 2000 0100011101 0000 to 2000 opening IC26 LEV 1100011101 0000 to 2000 opening IC27 LEV 0010011101 0000 to 2000 opening IC28 LEV 1010011101 0000 to 2000 opening...
Page 401 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 IC8 Opera- 1100000011 tion mode IC9 Opera- 0010000011 tion mode IC10 Opera- 1010000011 tion mode IC11 Opera- 0110000011 tion mode IC12 Opera- 1110000011 tion mode IC13 Opera- 0001000011 tion mode...
Page 402 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0000010011 1000010011 0100010011 1100010011 0010010011 1010010011 0110010011 1110010011 0001010011 1001010011 0101010011 1101010011 0011010011 1011010011 0111010011 IC1 filter 0000 to 9999 Hours since last maintenance IC2 filter 1111001001 0000 to 9999 [ h ]...
Page 403 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 0001011011 IC27 filter 0000 to 9999 Hours since last maintenance 1001011011 IC28 filter 0000 to 9999 [ h ] 0101011011 IC29 filter 0000 to 9999 1101011011 IC30 filter 0000 to 9999...
Page 404 [ X LED monitor display on the outdoor unit board ] Display Item Remarks 1234567890 1101011011 0011011011 1011011011 0111011011 1111011011 Main board The unit is 0000111011 Reset 0 to 254 [ time ] counter Compressor INV board 1000111011 0 to 254 Reset counter 0100111011...

Mitsubishi Electric CITY MULTI PUHY-P108 Service Handbook

I Read before Servicing

Restrictions

Outdoor Unit / BC Controller Components

4 Remote Controller

5 Electrical Wiring Diagram

6 Refrigerant Circuit

7 Control

8 Test Run Mode

10 XLED Monitor Display on the Outdoor Unit Board

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