Panasonic WH-MHF09G3E5 Service Manual
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Panasonic WH-MHF09G3E5 Service Manual

Air-to-water heatpump system. mono bloc unit
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This service
information is
designed for e
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Products pow
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tricity should be
service or re
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Order No
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WH-M
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WH-M
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© Panaso
onic Corporation
06105CE
Unit
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Summary of Contents for Panasonic WH-MHF09G3E5

  • Page 1 Order No o. PAPAMY150 06105CE Mono o Bloc U Unit WH-M MHF09G G3E5 WH-M MHF12G G6E5 Destina tion rope rkey WARNIN This service information is designed for e experienced rep pair technicians s only and is n ot designed for r use by the ge eneral public.

  • Page 2: Table Of Contents

    1. Safety Precautions ..........3 12.19 Dry Concrete Function .........70 2. Specifications ............. 5 13. Protection Control ..........71 WH-MHF09G3E5 ........... 5 13.1 Protection Control for All Operations ...71 WH-MHF12G6E5 ........... 7 13.2 Protection Control for Heating Operation..73 3. Features ............... 9 14.

  • Page 3: Safety Precautions

    1. Safety Precautions  Read the following “SAFETY PRECAUTIONS” carefully before installation of (Mono bloc) Air-to-Water Heatpump system (hereafter referred to as “Mono bloc unit”).  Electrical works and water installation works must be done by licensed electrician and licensed water system installer respectively.
  • Page 4 WARNING This equipment is strongly recommended to be installed with Residual Current Device (RCD) on-site according to the respective national wiring rules or country-specific safety measures in terms of residual current. The unit is only for use in a closed water system. Utilization in an open water system may lead to excessive corrosion of the water piping and risk of incubating bacteria colonies, particularly Legionella, in water.

  • Page 5: Specifications

    2. Specifications WH-MHF09G3E5 Item Unit Refrigerant System Performance Test Condition EN14511 Condition A7W35 A2W35 (Ambient/Water) 9.00 9.00 Heating Capacity BTU/h 30700 30700 kcal/h 7740 7740 4.64 3.45 kcal/hW 3.99 2.97 Air Flow /min (ft /min) 76.8 (2710) Refrigeration Control Device...
  • Page 6 Item Unit Mono Bloc Unit Power factor means total figure of compressor and outdoor fan motor. Number of core Power Cord Length m (ft) Thermostat Electronic Control Protection Device Electronic Control Item Unit Water System Performance Test Condition EN14511 Outdoor Ambient °C -20 ~ 35 Operation Range...

  • Page 7: Wh-Mhf12G6E5

    WH-MHF12G6E5 Item Unit Refrigerant System Performance Test Condition EN14511 Condition A7W35 A2W35 (Ambient/Water) 12.00 12.00 Heating Capacity BTU/h 41000 41000 kcal/h 10320 10320 4.46 3.26 kcal/hW 3.84 2.80 Air Flow /min (ft /min) 80.0 (2830) Refrigeration Control Device Expansion Valve Refrigeration Oil FV50S (1600) Refrigerant (R407C)
  • Page 8 Item Unit Mono Bloc Unit Power factor means total figure of compressor and outdoor fan motor. Number of core Power Cord Length m (ft) Thermostat Electronic Control Protection Device Electronic Control Item Unit Water System Performance Test Condition EN14511 Outdoor Ambient °C -20 ~ 35 Operation Range...

  • Page 9: Features

    3. Features  Inverter Technology - Energy saving  High Efficiency  Compact Design  Environment Protection - Non-ozone depletion substances refrigerant (R407C)  Easy to use remote control  Weekly Timer setting  Quality Improvement - Random auto restart after power failure for safety restart operation - Gas leakage protection - Prevent compressor reverse cycle - Inner protector to protect compressor...

  • Page 10: Location Of Controls And Components

    4. Location of Controls and Components Mono Bloc Unit Air inlet (rear) Top Plate Air inlet (side) Cabinet Front Plate Air outlet Handle (2 pieces front and 2 pieces behind)
  • Page 11 4.1.1 Main Components (VIEW WITHOUT COVER) DETAIL A g DETAIL A h WH-MHF12G6E5 WH-MHF09G3E5 (WITHOUT OLP (WITHOUT OLP COVER) COVER) View without cabinet top plate Optional cord / cable :- • Power Supply 1 3-way Valve cable (3 x min 0.5mm •...
  • Page 12 4.1.2 Locatio on of Con ntrol 4.1.2 mote Cont trol The u ser interface e allows the i nstaller and user to setup p, use and m maintain the u unit. 　 OFF/ON N Button This but tton starts or stops the mo ode operation function of th...
  • Page 13 4.1.3 To adjust initial settings Dealer Select menus and determine settings according to the system available in the household. It is recommended that all alterations of settings are done by an authorised dealer or specialist. Operation LED Display • After initial installation, you may manually adjust the settings. The initial setting remains active until the user changes it.
  • Page 14 Operation/settings to be done only by the authorised dealer/specialist. Dealer Operation/settings to be done by the authorised dealer/specialist or user. User Booster Heater To activate or deactivate the water tank’s booster heater. Note: If NO is selected, menu 10 is skipped. Booster Heater Delay Timer 20 minutes ~ To delay time for the booster heater to activate while the system is...
  • Page 15 4.1.4 How to use User The system is turned off by an external switch. Turn on or off the system Press When the system is ON, the operation LED is lit and the actual water outlet temperature and outdoor ambient temperature are shown on the display.
  • Page 16 Operation/settings to be done only by the authorised dealer/specialist. Dealer Operation/settings to be done by the authorised dealer/specialist or user. User Dealer Display Temperature setting System temperature setting The system controls the temperature for each menu based on the outdoor ambient temperature. •...
  • Page 17 User Desired temperature setting Shifting the water temperature This easily shifts the water outlet temperature if the setting is undesirable. 1 Press to enter the water temperature shifting mode. 2 Press to change setting. 3 Press to set the desired temperature. (temperature range: -5 °C ~ 5 °C) Temperature setting
  • Page 18 Operation/settings to be done only by the authorised dealer/specialist. Dealer Operation/settings to be done by the authorised dealer/specialist or user. User User Weekly timer setting Promotes energy saving by allowing you to set up to 6 programmes in any given day. Lights up if Timer operation is selected Indicates the next timer operation programme...
  • Page 19 Dry Concrete Function • During construction to dry the concrete under a preset temperature. 1 Press simultaneously and hold for 5 seconds until the display shows “ ”. 2 Press (The display shows “ ”.) 3 Press to select day. Press to set the desired temperature.

  • Page 20: Dimensions

    5. Dimensions Mono Bloc Unit (579) 1283 (30) 318.5 Unit: mm 83.5...

  • Page 21: Refrigeration And Water Cycle Diagram

    6. Refrigeration and Water Cycle Diagram Outdoor Side Mono bloc Unit Water Pressure Gauge Expansion Liquid Vessel Water Capillary Side Flow Expansion Tube (3-Way Switch Valve Strainer Strainer Valve) Subcooler Water Inlet (Connect Water Pump Sanitary Pipe Tank) Temp. Expansion Strainer Pipe Sensor...
  • Page 22 Indoor Side Room Thermo (Optional) Fan Coil Unit (Heating / Cooling) Connect to Mono bloc Unit Terminal Board (Water System) Panel Heater Unit (Heating) 3-Way Valve 2-Way Valve To Water Inlet Mono bloc Unit From Water Outlet Mono bloc Unit Floor Heating Panel (Heating) Heater 1 (3kW)

  • Page 23: Block Diagram

    7. Block Diagram WH-MHF09G3E5...

  • Page 24: Wh-Mhf12G6E5

    WH-MHF12G6E5...

  • Page 25: Wiring Connection Diagram

    8. Wiring Connection Diagram WH-MHF09G3E5...

  • Page 26: Wh-Mhf12G6E5

    WH-MHF12G6E5...

  • Page 28: Electronic Circuit Diagram

    9. Electronic Circuit Diagram WH-MHF09G3E5...

  • Page 29: Wh-Mhf12G6E5

    WH-MHF12G6E5...

  • Page 31: Printed Circuit Board

    10. Printed Circuit Board 10.1 Water system 10.1.1 Main Printed Circuit Board CN-SOLAR CN-TH1 CN-TH2 CN-TH3 CN-FLOW CN-T1 CN-OLP2 CN-REMOTE2 CN-THERMO CN-PUMP2 CN-OLP1 CN-RCV2 AC1-L1 CN-V3 DATA AC1-L2 CN-PWR AC1-L3 CN-HT AC1-N...
  • Page 32 10.1.2 Solar Printed Circuit Board (Optional) ACN-3V ACL2-3V ACL1-3V PUMP-L PUMP-N CN-SOLAR_B...

  • Page 33: Refrigerant System

    10.2 Refrigerant System 10.2.1 Main Printed Circuit Board CN-FM1 CN-FM2 COM3 AC-WHT02 AC-BLK02 CN-HT1 CN-HT2 CN-HOT CN-PSW1 CN-RY1 CN-LPS CN-TH2 CN-HPS CN-EV2 CN-TH3 CN-DIS CN-TH1 CN-EV...
  • Page 34 10.2.2 Noise Filter Printed Circuit Board CN-ACL AC-BLK CN-BLK AC-WHT CN-ACN CN-WHT 10.2.3 Capacitor Printed Circuit Board DCN-IN DCN-OUT DCP-IN AC-C...

  • Page 35: Installation Instruction

    11. Installation Instruction Mono Bloc Unit Dimension Diagram 1283 Front view Rear view 83.5 Bottom view Drain hose connector Water Outlet Pipe Water Inlet Pipe...
  • Page 36 Main Components (VIEW WITHOUT COVER) DETAIL A g DETAIL A h WH-MHF12G6E5 WH-MHF09G3E5 (WITHOUT OLP (WITHOUT OLP COVER) COVER) View without cabinet top plate Optional cord / cable :- • Power Supply 1 3-way Valve cable (3 x min 0.5mm •...

  • Page 37: Select The Best Location

    11.1 Select The Best Location 11.2 Mono Bloc Unit Installation  Mono bloc unit will become heavy when filled with Install the Mono bloc unit in outdoor locations only.  water. Please install the unit on a strong concrete floor Avoid installations in areas where the ambient and consider the weight of the unit and water.

  • Page 38: Piping Installation

    11.3 Piping Installation WARNING This section is for authorized and licensed electrician / water system installer only. Work behind the front plate secured by screws must only be carried out under supervision of qualified contractor, installation engineer or service person. Please engage a licensed water circuit installer to install this water circuit.

  • Page 39: Connect The Cord And Cable To Mono Bloc Unit

    Drainage piping installation  Use a drain hose with inner diameter of 15 mm.  The hose must be installed in a continuously downward direction and left open to the frost-free atmosphere.  If drain hose is long, use a metal support fixture along the way to eliminate the wavy pattern of drain tube. ...
  • Page 40 Bind all power supply cords to the U-Shaped Tube (Covered with foam) with band strap (field supply) Bind all optional cables and cords with this bands. Bind all power supply cords to the Tube (Covered with foam) with band strap (field supply) Apply cut Guide all the Bushing 7...
  • Page 41 10. Solar Three-way Valve cable shall be (3 × min 0.5 mm ), double insulation layer PVC-sheathed or polychloroprene sheathed cable. 11. Solar Pump Station cable shall be (2 × min 0.5 mm ), of double insulation PVC-sheathed or polychloroprene sheathed cable.
  • Page 42 11.4.3 Wired Remote Control Installation WARNING Do not modify the length of the remote control cable. Otherwise, it will cause fire or electrical shock. Be sure to turn off the main power before installing and connecting the remote control. Otherwise, it will cause the electrical shock. Use the attached accessories parts and specified parts for installation.
  • Page 43 Embed an outlet box (JIS C 8336) into the wall. Outlet box may be purchased separately. Medium-sized square outlet box (obtain locally) Part No. DS3744 (Panasonic Co., Ltd.) or equivalent. Secure the remote control lower case to the outlet box with the two accessory screws (3).
  • Page 44 B. If Remote Control Cable Is Exposed Use nipper to cut a notch at the upper case. Install the remote control lower case to the (Select the intended feeding-out position) wall with the two accessory screws (4). Route the remote control cable (2) inside the Fasten the screws properly until screw head is lower case in accordance with the intended lower than the rib and reach the base of...

  • Page 45: Checking And Test Run Procedures

    11.5 Checking and Test Run Procedures WARNING Be sure to switch off all the power supply before performing each of the below action. Remove The Cabinet Front Plate (1) Remove the 5 mounting screws as shown in the illustration. (2) Slide the cabinet front plate downward to release the pawls.

  • Page 46: Operation And Control

    Opera ation an nd Contr 12.1 1 Basic F Function Invert er control, w which equippe ed with a mic crocomputer in determini ng the most suitable ope erating mode e as time passe es, automatic cally adjusts output powe er for maximu um comfort a always.
  • Page 47 Heat Mode Operation Time Chart 12.1.3 Tank Mode Operation Control contents:  3 ways valve direction 3 ways valve switch to tank side during Tank Thermo ON condition. Switch 3 ways valve to room side when tank achieve Tank Thermo OFF temperature and SOLAR turn ON condition. ...
  • Page 48  Water Inlet Thermo Condition Heat pump THERMO OFF TEMP: 1. Water inlet temperature > 65°C for continuous 60 seconds, heat pump OFF. Heat pump THERMO ON TEMP: 1. Heat pump THERMO ON TEMP = Water inlet temperature < 65°C. ...
  • Page 49 Tank mode (Solar Priority is not set) 3 ways valve Heat pump thermo-off Heat Pump Tank thermo on Tank thermo-off Booster Heater ID Water Pump Solar request Solar 3 way valve off eventhough solar request on due Solar 3 way valve to heat pump operates Timer for Booster heater turn On back...
  • Page 50 Tank Thermo ON/OFF Characteristic THERMO OFF TEMP: 1. THERMO OFF TEMP = Heat pump tank target temperature + [0°C]. 2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF due to water thermo, switch 3 ways valve to room side OR 3.
  • Page 51 Heat + Tank Mode (Heating priority set) Under Solar Priority Set Condition: Room Room Thermo Thermo OFF Room Thermo On, 3 ways valve switch to room side Tank Heat Pump Tank Heat Pump Thermo Off Heat Pump Thermo On Water Pump Backup Heater Booster Heater Solar Request...
  • Page 52 Setting 2: When heating priority is not set by control panel:  When Solar Priority is set/not set by control panel: 1. 3 ways valve control: 3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank heat-up interval.
  • Page 53 Solar Operation Condition (Only during solar priority is set condition)  When solar pump ON, tank heat-up interval end early and 3 ways valve switch to room side. THERMO IN TEMP: 1. THERMO ON TEMP = Heat pump tank target temperature + [-8°C]. 2.
  • Page 54 Room thermo Room Thermo Go in tank interval Start with tank only after solar OFF mode first 3-way valve Switch to tank heat-up 2-way valve when room thermo OFF Tank thermo Heat pump OFF (End) thermo OFF Heat Pump Heat pump OFF at room side when room thermo OFF and Water Pump high tank temp...
  • Page 55 Heat + Tank Mode (Heating priority not set) Under Solar Priority Not Set Condition: Room thermo Room Thermo Go in room interval Start with tank only after solar OFF mode first 3-way valve Switch to tank heat-up 2-way valve when room thermo OFF Tank thermo Heat pump OFF (End)
  • Page 56 12.1.5 Setting Water Outlet Temperature for Heat Mode  The set temperature defines the parameters for the outdoor ambient temperature dependent operation of the unit. Where by the internal water setting temperature is determined automatically depending on the outdoor temperature. The colder outdoor temperatures will result in warmer water and vice versa. The user has the possibility to shift up or down the target water temperature by control panel setting.

  • Page 57: Water Pump

    12.1.7 Fan Motor Operation Fan motor is adjusted according to operation condition. It starts when compressor starts operation and it stops 30 seconds after compressor stops operation. Compressor: Fan Speed Outdoor Fan: 30 sec 12.2 Water Pump 12.2.1 Water Pump Control ...
  • Page 58 12.2.2 A-class Pump Specification Power for drive DC280-373V Pump Power for control DC15±10% Control Signal DC0V-DC6V Feedback Speed (pulse signal) 4 pulse/rotation Control signal is analog voltage (DC0V-6V) generated by microcomputer PWM port. Microcomputer can change analog voltage by changing PWM duty. 12.2.3 Water Flow Rate Setting ...

  • Page 59: Pump Down Operation [Service Mode: 01]

    12.2.4 Water Pump Speed Feedback Error  Basically pump speed feedback is control by micon.  When pump speed is below low limit or over high limit for a few seconds, micon detect pump error and system is stopped.  Error detection conditions: ...

  • Page 60: Mono Bloc Unit Safety

    12.5 Mono Bloc Unit Safety 12.5.1 Mono Bloc Unit Safety Control When water pump is ON, the system will start checking flow switch status (ON/OFF). If the flow switch ON for 10 seconds, the system will check on the water inlet temperature for 10 seconds. If the water inlet temperature not exceeds 80°C, the water pump shall be continuously running with normal mode.

  • Page 61: Back-Up Heater Control

    12.8 Back-Up Heater Control 12.8.1 Electric Heater Control Normal Heating Mode Heater On condition: a. Heater switch is ON b. After Heatpump thermo ON for [30] mins c. After water pump operate [9] mins d. Outdoor air temperature < Outdoor set temperature for heater e.

  • Page 62: Tank Booster Heater Control

    12.9 Tank Booster Heater Control 12.9.1 Tank Booster Heater Control Heating operation condition: Heater OFF Tank set temperature + Tank set temperature + [-5°C] [+2°C] Heater ON Booster heater Turn On condition: After BOOSTER HEATER DELAY TIMER fulfill during heatpump startup time in tank mode, or during switching from heating heat-up interval to tank heat-up interval in heat + tank mode (heating priority not set).

  • Page 63: Sterilization Mode

    12.11 Sterilization Mode  Purpose: To sterilize water tank by setting the required boiling temperature.  Control start condition: Tank connection menu is set to YES by control panel. Sterilization menu is set to YES by control panel. Sterilization signal received from control panel by timer. ...

  • Page 64: Anti Freeze Control

    12.13 Anti Freeze Control  Anti freeze protection control menu can be set YES or NO by control panel.  In heatpump system, there are 3 types of anti freeze control: 1. Expansion tank anti-freeze control  Expansion tank anti freeze heater ON condition: Outdoor ambient temp.

  • Page 65: Solar Operation (Optional)

    12.14 Solar Operation (Optional) 12.14.1 Solar Operation: External solar heat source signal can be connect to unit for proper control of heat source switching during tank boiling time. Control according to preset whether solar priority is set or not. When tank connection is NOT set at SETTING mode, solar operation is disabled. When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump 3 Way Valve is requested ON (Refer to figure below).
  • Page 66 Solar Operation Chart in different mode and condition Tank Mode (Solar Priority SET condition) 3 way valve tank side Heatpump Booster heater Solar request Solar off due to upper limit Solar 3 way valve Tank Mode (Solar Priority NOT SET condition) 3 way valve tank side Heat pump...
  • Page 67 Heat + Tank Mode (Heating Priority NOT SET) (Solar Priority SET condition) When solar 3 way valve turn on during Tank interval, cancel Tank interval immediately and switch 3-way valve to the After heating/cooling interval, stand by to go in tank side after solar 3 way room side and start a heating/cooling interval.

  • Page 68: External Room Thermostat Control (Optional)

    12.15 External Room Thermostat Control (Optional) Purpose: Better room temperature control to fulfill different temperature request by external room thermostat. Recommended external room thermostat: Maker Characteristic Siemen (REV200) Touch panel Siemen (RAA20) Analog Connection of external room thermostat: Wire Connection and thermo characteristic of Siemen REV200: Setting L/L1 (H) Heat Thermo...

  • Page 69: Three Ways Valve Control

    * During pump down and force mode, fix 3 ways valve in close condition. * Recommended Parts : SFA 21/18 (Siemens) 12.17 External OFF/ON Control  Communication circuit between Mono Bloc unit and external controller is as per below. Panasonic 12V_4 External Controller 0.01µ...

  • Page 70: Holiday Mode

    ACTUAL AUTO HEATER HEAT BOOSTER MON TUE WED THU FRI SAT SUN °C COOL QUIET TANK SETTING HEATER STATUS °C FORCE SERVICE OPERATION During EXTERNAL SW OFF, display “EXT SW OFF” REMOTE CONTROLLER REMOTE CONTROLLER SIGNAL EXTERNAL CONTROLLER SWITCH UNIT * During External Switch OFF condition, it is allow to change the setting and also timer operation.

  • Page 71: Protection Control

    13. Protection Control 13.1 Protection Control for All Operations 13.1.1 Time Delay Safety Control The compressor will not start for three minutes after stop of operation. 13.1.2 30 Seconds Forced Operation Once the compressor starts operation, it will not stop its operation for 30 seconds. However, it can be stopped using control panel at mono bloc unit.
  • Page 72 13.1.6 Low Frequency Protection Control 2  When all the below conditions comply, the minimum compressor frequency will change to lower frequency. Temperature, T, for: Heating Outlet water (°C) T < 14 or T ≥ 48 Outdoor air (°C) T < 4 or T ≥ 24 Indoor heat exchanger (°C) T ≥...

  • Page 73: Protection Control For Heating Operation

    13.2 Protection Control for Heating Operation 13.2.1 Outdoor Air Temperature Control The maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoid compressor overloading. 13.2.2 Deice Operation When outdoor pipe temperature and outdoor air temperature is low, deice operation start where fan motor stop. ...
  • Page 74  Deice operation time diagram a. Deice mode 1 control: Free Free Compressor Four way valve ID pump OD fan Free Free Expansion valve Free max 9 minutes 30 seconds deice 1 b. Deice mode 2 control: Deice mode 2 Normal Heating Deice...

  • Page 75: Servicing Mode

    14. Servicing Mode 14.1 Remove The Cabinet Front Plate 1. Remove the 5 mounting screws as shown in the illustration. 2. Slide the cabinet front plate downward to release the pawls. Then, pull it toward front to remove it. Cabinet Front Plate Mounting screws Mounting screws...

  • Page 76: How To Adjust Water Flow Rate

    Before adjust the water flow rate, make sure that the total water volume in the installation is 50 litres minimum for heating side. The default setting is SPEED 4 (Only for WH-MHF09G3E5) and SPEED 5 for WH-MHF12G6E5. Please ensure the minimum flow rate is not less than 13 l/min and not more than 50 l/min.

  • Page 77: Eeprom Factory Default Data Setup Procedure

    14.7 EEPROM Factory Default Data Setup Procedure This process should be done at Gemstar (and/or) PAPAMY as the last process after any inspection. This condition should be activated by pressing combination of few SW's for certain time as shown. These 3 SW's should press continuously for 5secs. (Operation should be OFF during this period) When this condition is activated, default data should be written in EEPROM.

  • Page 78: Maintenance Guide

    Mainte enance Guide In ord er to ensure optimal perf formance of the unit, sea asonal inspec ctions on the unit, externa al filter and f field wiring have t to be carried d out at regul ar intervals. This mainten nance should d be carried out by autho...
  • Page 79 WARNI Be caref ful not to touch parts other than n RCCB/ELCB t test button when n the power is s supplied to Indo oor Unit. Else, el lectrical shock may hap ppen. Push the “TE EST” button o on the RCCB B/ELCB.

  • Page 80: Troubleshooting Guide

    16. Troubleshooting Guide 16.1 Refrigeration Cycle System Normal Pressure (Standard) In order to diagnose malfunctions, make sure that there Gas pressure are no electrical problems before inspecting the MPa (kg/cm refrigeration cycle. Such problems include insufficient insulation, problem Heating Mode 1.4 ~ 1.8 (14 ~ 18) with the power source, malfunction of a compressor and a fan.

  • Page 81: Relationship Between The Condition Of The Mono Bloc Unit And Pressure And Electric Current

    16.2 Relationship Between The Condition Of The Mono Bloc Unit And Pressure And Electric Current Heating Mode Condition of the Mono Bloc Unit Low Pressure High Pressure Electric current during operation Water leakage or insufficient water flow rate in the system Excessive amount of refrigerant Inefficient compression Insufficient refrigerant...

  • Page 82: Breakdown Self Diagnosis Function

    16.3 Breakdown Self Diagnosis Function 16.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)  When abnormality occur during operation, the system will stop operation, and OFF/ON remote control LED will blink and error code will display on the remote control Timer display LCD. ...

  • Page 83: Error Codes Table

    16.4 Error Codes Table Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verify No abnormality detected — —  Indoor/outdoor connection wire  Indoor/outdoor PCB Indoor/Outdoor capacity unmatched 90s after power supply  Specification and combination table in catalogue ...
  • Page 84 Diagnosis display Abnormality/Protection control Abnormality Judgement Primary location to verify  Water outlet sensor 2 (defective or Water outlet sensor 2 abnormality Continue for 5 sec. disconnected)  Outdoor air temperature sensor Outdoor air temperature sensor Continue for 5 sec. abnormality (defective or disconnected) ...

  • Page 85: Self-Diagnosis Method

    16.5 Self-diagnosis Method 16.5.1 Connection Capability Rank Abnormality (H12) Malfunction Decision Conditions: During startup operation of heating, the capability rank of indoor checked by the outdoor is used to determine connection capability rank abnormality. Malfunction Caused: Wrong model interconnected. Wrong indoor unit or outdoor unit PCB (main) used. Faulty indoor unit or outdoor unit PCB (main).
  • Page 86 16.5.2 Compressor Tank Temperature Sensor Abnormality (H15) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the compressor tank temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 87 16.5.3 Water Pump Abnormality (H20) Malfunction Decision Conditions: During startup and operation of cooling and heating, the rotation speed detected by the IPM of water pump motor during water pump operation is used to determine abnormal water pump (feedback of rotation > 6,000rpm or < 1,000rpm).
  • Page 88 16.5.4 Indoor Refrigerant Liquid Temperature Sensor Abnormality (H23) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the indoor refrigerant liquid temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main).
  • Page 89 16.5.5 Service Valve Error (H27) Malfunction Decision Conditions: During cooling operation, when:- [a] Indoor refrigerant pipe temperature at compressor startup - present indoor refrigerant pipe temperature < 2°C [b] Present high pressure - high pressure at compressor startup < 5kg/cm² **Judgment only for first time cooling operation and not during pump down operation.
  • Page 90 16.5.6 Compressor Low Pressure Protection (H42) Malfunction Decision Conditions: During operation of heating and after 5 minutes compressor ON, when outdoor pipe temperature below -29°C or above 26°C is detected by the outdoor pipe temperature sensor. Malfunction Caused: Dust accumulation on the outdoor unit heat exchanger. Air short circuit at outdoor unit.
  • Page 91 16.5.7 Water Flow Switch Abnormality (H62) Malfunction Decision Conditions: During operation of heating, the water flow detected by the indoor water flow switch is used to determine water flow error. Malfunction Caused: Faulty water pump. Water leak in system. Faulty connector connection. Faulty water flow switch.
  • Page 92 16.5.8 Outdoor Low Pressure Abnormality (H63) Malfunction Decision Conditions: During operation of heating, when the outdoor low pressure sensor output signal is 0Vdc or 5Vdc. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes. For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 93 16.5.9 Outdoor High Pressure Abnormality (H64) Malfunction Decision Conditions: During operation of heating, when the outdoor high pressure sensor output signal is 0Vdc or 5Vdc. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 4 times in 20 minutes. For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 94 16.5.10 Deice Circulation Error (H65) Malfunction Decision Conditions: During deice operation, flow switch detects water flow for 10 seconds during deice. Malfunction Caused: Secondary pump. Flow switch faulty. Water pump faulty. Indoor PCB. Abnormality Judgment: Continue 10 seconds. Troubleshooting: For safety reason and to prevent component breakdown, Caution always switch off the power before remove and connect the component.
  • Page 95 16.5.11 Indoor Backup Heater OLP Abnormality (H70) Malfunction Decision Conditions: During operation of indoor backup heater, when no power supplies to indoor backup heater or OLP open circuit. Malfunction Caused: Faulty power supply connector connection. Faulty connector connection. Faulty indoor backup heater overload protector (OLP). Faulty indoor unit PCB (main).
  • Page 96 16.5.12 Tank Temperature Sensor Abnormality (H72) Malfunction Decision Conditions: When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 97 16.5.13 Indoor-Control Panel Communication Abnormality (H76) Malfunction Decision Conditions: During standby and operation of heating, indoor-remote control error occur. Malfunction Caused: Faulty connector connection. Faulty remote control. Faulty indoor unit PCB (main). For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 98 16.5.14 Indoor/Outdoor Abnormal Communication (H90) Malfunction Decision Conditions: During operation of heating, the data received from outdoor unit in indoor unit signal transmission is checked whether it is normal. Malfunction Caused: Faulty outdoor unit PCB (main). Faulty indoor unit PCB (main). Indoor-outdoor signal transmission error due to wrong wiring.
  • Page 99 16.5.15 Tank Booster Heater OLP Abnormality (H91) Malfunction Decision Conditions: During operation of tank booster heater, and tank booster heater OLP open circuit. Malfunction Caused: Faulty connector connection. Faulty tank booster heater overload protector (OLP). Faulty indoor unit PCB (main). Abnormality Judgment: Continue for 60 seconds.
  • Page 100 16.5.16 Unspecified Voltage between Indoor and Outdoor (H95) Malfunction Decision Conditions: The supply power is detected for its requirement by the indoor/outdoor transmission. Malfunction Caused: Insufficient power supply. Faulty outdoor unit PCB (noise filter/main). For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 101 16.5.17 Outdoor High Pressure Protection (H98) Malfunction Decision Conditions: During operation of heating, when pressure 4.0 MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: Faulty water pump. Insufficient water flow rate in system. Water leak in system. 2/3 way closed.
  • Page 102 16.5.18 Indoor Freeze-up Protection (H99) Malfunction Decision Conditions: During anti-freezing control in cooling operation, when the indoor refrigerant liquid temperature < 0°C. Malfunction Caused: Faulty water pump. Insufficient water flow rate in system. Water leak in system. 2 way valve partially closed. Clogged expansion valve or strainer.
  • Page 103 16.5.19 Outdoor High Pressure Switch Activate (F12) Malfunction Decision Conditions: During operation of heating, when pressure 4.5MPa and above is detected by outdoor high pressure switch. Malfunction Caused: Dust accumulation on the outdoor unit heat exchanger. Air short circuit at outdoor unit. Faulty water pump.
  • Page 104 16.5.20 Compressor Rotation Failure (F14) Malfunction Decision Conditions: A compressor rotation failure is detected by checking the compressor running condition through the position detection circuit. Malfunction Caused: Compressor terminal disconnect. Faulty outdoor unit PCB (main). Faulty compressor. Abnormality Judgment: Continue 4 times in 20 minutes. For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 105 16.5.21 Outdoor Fan Motor (DC Motor) Mechanism Locked (F15) Malfunction Decision Conditions: The rotation speed detected by the Hall IC of the fan motor during fan motor operation is used to determine abnormal fan motor (feedback of rotation > 2550rpm or < 50rpm). Malfunction Caused: Operation stop due to short circuit inside the fan motor winding.
  • Page 106 16.5.22 Input Over Current Detection (F16) Malfunction Decision Conditions: During operation of heating, when outdoor current above 27.9A is detected by the current transformer (CT) in the outdoor unit PCB. Malfunction Caused: Excessive refrigerant. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 20 minutes.
  • Page 107 16.5.23 Compressor Overheating (F20) Malfunction Decision Conditions: During operation of heating, when temperature above 112°C is detected by the compressor tank temperature sensor. Malfunction Caused: Faulty compressor tank temperature sensor. 2/3 way valve closed. Refrigerant shortage (refrigerant leakage). Clogged expansion valve or strainer. Faulty outdoor unit PCB (main).
  • Page 108 16.5.24 IPM Overheating (F22) Malfunction Decision Conditions: During operation of heating, when temperature 95°C is detected by the outdoor IPM temperature sensor. Malfunction Caused: Faulty outdoor unit fan motor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue 3 times in 30 minutes. For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 109 16.5.25 Output Over Current Detection (F23) Malfunction Decision Conditions: During operation of heating, when outdoor DC current is above 40.1 ± 5.0A (for: UD07~09CE) OR 44.7 ± 5.0A (for: UD12~16CE) is detected by the IPM DC Peak sensing circuitry in the outdoor unit PCB (main). Malfunction Caused: Faulty outdoor unit PCB (main).
  • Page 110 16.5.26 Refrigeration Cycle Abnormality (F24) Malfunction Decision Conditions: During operation of heating, compressor frequency > Frated. During operation of heating, running current: 0.65A < I < 1.65A. During operation of heating, indoor refrigerant liquid temperature - water inlet temperature < 5°C. Malfunction Caused: Faulty water inlet or indoor refrigerant liquid temperature sensors.
  • Page 111 16.5.27 Four Way Valve Abnormality (F25) Malfunction Decision Conditions: During heating operation, when the indoor pipe temperature of thermostat ON indoor unit < 0°C. Malfunction Caused: Faulty sensor. Faulty connector connection. Faulty outdoor unit PCB (noise filter/main). Faulty four way valve. Abnormality Judgment: Continue 4 times in 30 minutes.
  • Page 112 16.5.28 Outdoor High Pressure Switch Abnormal (F27) Malfunction Decision Conditions: During compressor stop, and outdoor high pressure switch is remain opened. Malfunction Caused: Faulty connector connection. Faulty switch. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 1 minute. For safety reason and to prevent component breakdown, Troubleshooting: always switch off the power before remove and connect the component.
  • Page 113 16.5.29 Indoor Water Outlet Temperature Sensor 2 Abnormality (F30) Malfunction Decision Conditions: During startup and operation of cooling and heating, the temperatures detected by the indoor water outlet temperature sensor 2 are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor.
  • Page 114 16.5.30 Outdoor Air Temperature Sensor Abnormality (F36) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor air temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 115 16.5.31 Indoor Water Inlet Temperature Sensor Abnormality (F37) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the indoor water inlet temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main).
  • Page 116 16.5.32 Outdoor Discharge Pipe Temperature Sensor Abnormality (F40) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor discharge pipe temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main).
  • Page 117 16.5.33 Power Factor Correction (PFC) Abnormality (F41) Malfunction Decision Conditions: During operation of heating, when the PFC protection circuitry in the outdoor unit PCB (main) senses abnormal high DC voltage level. Malfunction Caused: Power supply surge. Compressor windings not uniform. Faulty outdoor unit PCB (main).
  • Page 118 16.5.34 Outdoor Pipe Temperature Sensor Abnormality (F42) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor pipe temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 119 16.5.35 Outdoor Defrost Temperature Sensor Abnormality (F43) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the outdoor defrost temperature sensor are used to determine sensor error. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty outdoor unit PCB (main). Abnormality Judgment: Continue for 5 seconds.
  • Page 120 16.5.36 Indoor Water Outlet Temperature Sensor Abnormality (F45) Malfunction Decision Conditions: During startup and operation of heating, the temperatures detected by the indoor water outlet temperature sensor are used to determine sensor errors. Malfunction Caused: Faulty connector connection. Faulty sensor. Faulty indoor unit PCB (main).
  • Page 121 16.5.37 Outdoor Current Transformer Open Circuit (F46) Malfunction Decision Conditions: A current transformer (CT) open circuit is detected by checking the compressor running frequency (≥ rated frequency) and CT detected input current (< 0.65A) for continuously 20 seconds. Malfunction Caused: CT defective.
  • Page 122 16.5.38 Cooling High Pressure Overload Protection (F95) Malfunction Decision Conditions: During operation of cooling, when pressure 4.0MPa and above is detected by outdoor high pressure sensor. Malfunction Caused: Dust accumulation in the outdoor unit heat exchanger. Air short circuit at outdoor unit. 2 way valve closed.

  • Page 123: Disassembly And Assembly Instructions

    17. Disassembly and Assembly Instructions WARNING High Voltage are generated in the electrical parts area by the capacitor. Ensure that the capacitor has discharged sufficiently before proceeding with repair work. Failure to heed this caution may result in electric shocks. WARNING Be sure to switch off all the power supply before performing each of the below action.

  • Page 124: To Remove The Cabinet Rear Plate

    17.3 To Remove The Cabinet Rear Plate 2 Remove 2 mounting screws. 5 Slide the cabinet rear plate downward to release the pawls. Then, pull it out to remove it. 3 Remove 7 mounting screws. 4 Remove 2 mounting screws. 1 Remove 2 mounting screws.

  • Page 125: To Remove Transformer And Electronic Controller Board

    17.6 To Remove Transformer and Electronic Controller Board 1 Disconnect the 2 lead wire T1, T2 (Black) and connector CN-T1 (White) from the Electronic Controller Board. Transformer 2 Remove 4 screws to remove Transformer. Electronic Controller Board 4 Using screw driver remove screw to remove Electronic Controller Board.

  • Page 126: To Remove Water Pump

    During reinstall Air Purge Valve. Make sure plug is fully close in clockwise direction. Packing Apply some water based grease on packing surface before fix with shut off valve. 17.8 To Remove Water Pump Water Pump 3 Loosen the nut. 2 Remove the screw from the particular plate.

  • Page 127: To Remove Bottle Complete

    17.9 To Remove Bottle Complete 2 Remove the retaining ring. 4 Remove 4 screws to remove the Bottle Complete. 3 Loosen 2 nuts. 1 Remove the OLP terminal cover, then detached lead wire HT1-L2 (orange) and AC2-L3 (black) from the OLP terminal. Bottle Complete When reinstall the water pipe, use grease or water at the joining.

  • Page 128: Technical Data

    18. Technical Data 18.1 Operation Characteristics 18.1.1 WH-MHF09G3E5 Heating Characteristics at Different Outdoor Air Temperature  Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C 11.000 10.000 9.000 8.000...
  • Page 129 18.1.2 WH-MHF12G6E5 Heating Characteristics at Different Outdoor Air Temperature  Condition Outdoor air temperature : 7°C (DBT), 6°C (WBT) Indoor water inlet temperature : 30°C Indoor water outlet temperature : 35°C 14.000 13.000 12.000 11.000 10.000 9.000 Outdoor Temperature (°C) 6.500 5.500 4.500...

  • Page 130: Heating Capacity Table

    18.2 Heating Capacity Table 18.2.1 WH-MHF09G3E5 Water 65** Out (°C) Input Input Input Input Input Input Outdoor Capacity Capacity Capacity Capacity Capacity Capacity Power Power Power Power Power Power Air (°C) 9000 3460 9000 3710 9000 4010 8800 4260 8500...

  • Page 131: Exploded View And Replacement Parts List

    19. Exploded View and Replacement Parts List 19.1 (Refrigerant System)
  • Page 132 × 8...
  • Page 133 Note:  The above exploded view is for the purpose of parts disassembly and replacement.  The non-numbered parts are not kept as standard service parts.
  • Page 134 SAFETY REF. NO. DESCRIPTION & NAME QTY. WH-MHF09G3E5 WH-MHF12G6E5 REMARK BASE PAN ASS’Y (1) CWD52K1276 ← COMPRESSOR 4JD650XCA22 ← BUSHING - COMPRESSOR MOUNT CWH50055 ← NUT - COMPRESSOR MOUNT CWH561049 ← CRANKCASE HEATER CWA341053 ← CONDENSER COMPLETE CWB32C3987 ←...
  • Page 135 SAFETY REF. NO. DESCRIPTION & NAME QTY. WH-MHF09G3E5 WH-MHF12G6E5 REMARK TERMINAL BOARD ASS’Y (U, V, W, A) CWA28K1334 ← SOUND PROOF MATERIAL CWG302598 ← SOUND PROOF MATERIAL CWG302599 ← (Note)  All parts are supplied from PAPAMY, Malaysia (Vendor Code: 00029488).

  • Page 136: Water System)

    19.2 (Water System)
  • Page 137 Note:  The above exploded view is for the purpose of parts disassembly and replacement.  The non-numbered parts are not kept as standard service parts.
  • Page 138 SAFETY REF. NO. DESCRIPTION & NAME QTY. WH-MHF09G3E5 WH-MHF12G6E5 REMARK BASE PAN ASS’Y (2) CWD52K1381 ← HOT WATER COIL - COMPLETE CWB90C1138 ← RECEIVER CWB141073 ← FLOW SWITCH CN-FLOW CWB621128 ← PUMP CWB532116 ← BOTTLE COMP. CWH90C0054 ←...

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