Daikin ComfortNet DX16TC Series Service Instructions Manual
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Daikin ComfortNet DX16TC Series Service Instructions Manual

Condensing units, split system heat pumps with r-410a refrigerant blowers, coils, & accessories
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Service Instructions
ComfortNet™
DX16TC & DX18TC Condensing Units,
DZ16TC & DZ18TC Split System Heat Pumps
with R-410A Refrigerant
Blowers, Coils, & Accessories
This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman
does not assume any responsibility for property damage or personal injury due to improper
service procedures or services performed by an unqualified person.
RSD6200007r21
March 2020
Copyright © 2015-2020 Daikin Manufacturing Company, L.P.
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Summary of Contents for Daikin ComfortNet DX16TC Series

  • Page 1 This manual is to be used by qualified, professionally trained HVAC technicians only. Goodman does not assume any responsibility for property damage or personal injury due to improper service procedures or services performed by an unqualified person. RSD6200007r21 March 2020 Copyright © 2015-2020 Daikin Manufacturing Company, L.P.
  • Page 2 INDEX IMPORTANT INFORMATION.............3 SYSTEM OPERATION...............27 PRODUCT IDENTIFICATION............4 TROUBLESHOOTING CHART............31 ACCESSORIES................17 SERVICING TABLE OF CONTENTS...........32 PRODUCT DESIGN..............24 SERVICING................33 WIRING DIAGRAM..............98 IMPORTANT INFORMATION Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service.
  • Page 3 IMPORTANT INFORMATION SAFE REFRIGERANT HANDLING While these items will not cover every conceivable situation, they should serve as a useful guide. WARNING WARNING O AVOID POSSIBLE EXPLOSION: EFRIGERANTS ARE HEAVIER THAN AIR. HEY CAN "PUSH OUT" THE • EVER APPLY FLAME OR STEAM TO A REFRIGERANT CYLINDER. F YOU OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE.
  • Page 4 PRODUCT IDENTIFICATION ComfortNet™ D X 16 T C 024 1 7,8.9 11,12 Brand Engineering D - Daikin brand Major/Minor Revisions Type Voltage AC- R-410A 1 - 208/230V Single-Phase 60 Hz HP R-410A 3 - 208/230V Three-Phase 60 Hz 4 - 460V Three-Phase 60 Hz...
  • Page 5 PRODUCT IDENTIFICATION ComfortNet™ A R U F 18 B 1 4 AA 10,11 Brand Engineering* A Single-Piece Major/Minor Revisions Airhandler Unit Application Refrigerant Charge Ceiling Mount PSC Motor 4 = R-410a Multi Position PSC Motor Multi Position EEM Motor Electrical W Wall Mount PSC/EEM Motor 1 208/240V, 1 Phase, 60 Hz Cabinet Finish...
  • Page 6 PRODUCT IDENTIFICATION C A P F 1824 A 6 AA 5,6,7,8 11,12 Brand Engineering* Indoor Coil Major/Minor Revisions Refrigerant Charge Unit Application 2 = R-22 A Upflow/Downflow Coil 4 = R-410A H Horizontal A-Coil 6 = R-410A or R-22 Horizontal Slab Coil Coated Coils Nominal Width for Gas Furnace A = Fits 14"...
  • Page 7 PRODUCT IDENTIFICATION Product Category C - Indoor Coil Engineering Major/Minor Revision i r f t i s Cabinet Finish U - Uncased Nominal Width for Gas Furnace " 4 " 5 C - 21" Width " 5 plicable (Slab Coil) T - TXV 14 - 14"...
  • Page 8 PRODUCT IDENTIFICATION ComfortNet™ MB V C 12 Electrical Brand MB - Modular Blower 1: 208-230V/60Hz/1 PH Design Series Type A: First Series Variable Speed Circuit Breaker Communication Feature A: No Circuit Breaker 4-Wire Communication Ready B: Circuit Breaker Factory Heat Airflow 1200 CFM 00 No Heat...
  • Page 9 PRODUCT IDENTIFICATION ComfortNet™ D V 18 P T C B 1 4 AA 11,12 Brand Engineering* D Daikin Single Piece Major/Minor Revisions Airhandler *Not used for inventory management Unit Application Refrigerant Charge Multi Position 4 = R-410A Variable Speed Motor...
  • Page 10 PRODUCT IDENTIFICATION DX16TC DAIKIN BRAND X [AC], 16 SEER, TWO STAGE COMPRESSOR, COMMUNICATING Model/Rev Description Introduces Daikin brand 2-stage 16 SEER condensing units with R-410A, communicating DX16TC[024-060]1AA models. DX16TC0[24, 48]1AC Refrigerant charge reduction DX16TC0[24,36,48,60]1CA 16 SEER 2-Stage AC Development with improved performance.
  • Page 11 Introduces Daikin brand 2-stage 16 SEER heat pump units with R-410A, communicating DZ16TC[024-060]1AA models. DZ16TC[024-060]1AB Introduces Daikin brand 2-stage 16 SEER heat pump units with SanHau reversing valves. Replaced compressors with Copeland's UltraTech™ 3 lineup. Transitioned coils to 7mm. DZ16TC0[24,36,48,60]1CA Offers improved performance.
  • Page 12 PRODUCT IDENTIFICATION DV**PTC*14 SINGLE PIECE DAIKIN AIR HANDLER MULTIPLE-POSITION VARIABLE SPEED PAINTED TXV WITH 4-WIRE COMMUNICATING CONTROL Model/Rev Description DV24PTCB14AA Initial release of 13 SEER air handler with communicating control and serial DV[30-36, 48]PTCC14AA communicating indoor blower motor. DV[42-60]PTCD14AA DV24PTCB14AB DV[36, 48]PTCC14AB Updating the shared data information for all DV**PTC communicating models.
  • Page 13 PRODUCT IDENTIFICATION MBVC MODULAR BLOWER AIR HANDLER V-MULTI-POSITION VARIABLE-SPEED COMMUNICATING READY W/4-WIRES Model/Rev Description MBVC1200AA1-AA Introduction of module blower with variable speed blower motor with the new MBVC1600AA1-AA communicating control & serial communicating indoor blower motor. MBVC2000AA1-AA MBVC1200AA1-AB Introduction of a module blower with variable speed blower motor with communicating MBVC1600AA1-AB control &...
  • Page 14 PRODUCT IDENTIFICATION CAUF C-INDOOR COIL A-UPFLOW/DOWNFLOW UNCASED FLOWRATOR Model/Rev Description CAUF*****6AA Initial release of CAUF Dayton Upflow/Downflow coils. CAUF*****6BA Burr Oak Louvered Fin released in place of the Wavy Fin. CAUF****6*DA Replaced existing copper coils and other associated parts with aluminum components. CAUF*****6DB Drain pan material changed.
  • Page 15 PRODUCT IDENTIFICATION CHPF C-INDOOR COIL HORIZONTAL A-COIL PAINTED FLOWRATOR Model/Rev Description CHPF*****6AA Intial release of 13 SEER CHPF horizontal A coil. Released Burr Oak Louvered Fin in place of the Wavy Fin. The rows changed by one, (i.e. CHPF*****6BA 4 row to 3 row; 3 row to 2 row) where applicable. CHPF1824A6CA CHPF2430B6CA CHPF3636B6CA...
  • Page 16 PRODUCT IDENTIFICATION CAPF C-INDOOR COIL A-UPFLOW/DOWNFLOW PAINTED FLOWRATOR Model/Rev Description CAPF*****6AA Initial release of CAPF Dayton Upflow/Downflow coils CAPF*****6BA Burr Oak Louvered Fin released in place of the Wavy Fin CAPF36***CA Redesigned for performance improvement from 2 row to 3 row CAPF*****6DA Replaced existing copper coils and other associated parts with aluminum components CAPF*****6DB...
  • Page 17 ACCESSORIES DX16TC / DX18TC Model Description DX16TC024 DX16TC036 DX16TC048 DX16TC060 DX18TC024 DX18TC036 DX18TC048 DX18TC060 ABK-20 Anchor Bra cket Ki t TX2N4A TXV Ki t TX3N4 TXV Ki t TX5N4 TXV Ki t CSR-U-1 Ha rd-s ta rt Ki t CSR-U-2 Ha rd-s ta rt Ki t CSR-U-3 Ha rd-s ta rt Ki t...
  • Page 18 ACCESSORIES For Applications requiring a field installed access fitting 1/4 FLARE CONNECTION BULB TO BE LOCATED AT 10 OR 2 O'CLOCK BULB SUCTION LINE EVAPORATOR COIL TAILPIECE PISTON SEAL SEAL SUPPLIED W/ KIT DISTRIBUTOR BODY SEAL SUPPLIED W/ KIT EXPANSION VALVE 3/8"- SWEAT REMOVE BEFORE INSTALLING EXPANSION VALVE...
  • Page 19 ACCESSORIES FSK01A Freeze Thermostat Wire Nut Wire Nut Install Line Install Line Thermostat Thermostat Here Here Wire Nut Wire Nut...
  • Page 20 ACCESSORIES HK* SERIES ELECTRIC HEAT KITS - ELECTRIC HEAT KIT APPLICATIONS - MBVC ELECTRIC HEAT KIT BLOWER MBVC1200AA-1** MBVC1600AA-1** MBVC2000AA-1** X = Allowable combinations ^ = Circuit 1: Single Phase for Air Handler Motor Circuit 2: 3-Phase for HKR3 Heater Kits - = Restricted combinations...
  • Page 21 ACCESSORIES ELECTRIC HEAT KIT APPLICATIONS - AVPTC MODELS HKR-03* HKR-05*/-05C* HKR-06* HKR-08*/-08C* HKR-10*/-10C* HKR-15C* HKR-20C* HKR-21C* HKA-15C* HKA-20C* AVPTC183014A* AVPTC313714A* AVPTC426014A* Revision level that may or may not be designated. Circuit breaker option. NOTE: When 8kW and 10kW heat kits are used with an AVPTC1830 and AVPTC3137, matched with 2- ton outdoor unit, see Note 1 be- low.
  • Page 22 ACCESSORIES DV**PTC14** DVPTC Heat Kit Applications † †† ††† Type / Model 24B14-A* 30C14-A* 36C14-A* 48C14-A* 42D14-A* 48D14-A* 60D14-A* HKSX03XC HKSX05XC HKSX06XC HKSX08XC HKSX10XC HKSX15XF* HKSX20XF* HKSC05XC HKSC08XC HKSC10XC HKSC15XA HKSC15XB HKSC15XF* HKSC19CA* HKSC19CB* HKSC20DA HKSC20DB HKSCX20XF* HKSC25DC* * Revision level that may or may not be designated. Refer to the minimum airflow requirements for each of the heat kits.
  • Page 23 ACCESSORIES DV**PTC14** READY 15 DVPTC Model DV25PTCB14 DV29PTCB14 DV31PTCC14 DV33PTCC14 DV35PTCB14 DV37PTCB14 DV39PTCC14 DV37PTCC14 DV37PTCD14 DV49PTCC14 DV49PTCD14 DV59PTCC14 DV59PTCD14 DV61PTCD14 HKSX03XC HKSX05XC HKSX06XC HKSX08XC HKSX10XC HKSC05XC HKSC08XC HKSC10XC HKSC15XA HKSC15XB HKSC15XF HKSC19CA HKSC19CB HKSC19CH HKSC20DA HKSC20DB HKSC20DH HKSC20XF HKSC25DA HKSC25DB...
  • Page 24 PRODUCT DESIGN This section gives a basic description of cooling unit operation, The ZPS two-step modulated scroll uses a single step of un- its various components and their basic operation. Ensure loading to go from full capacity to approximately 67% capacity. your system is properly sized for heat gain and loss according A single speed, high efficiency motor continues to run while to methods of the Air Conditioning Contractors Association...
  • Page 25 PRODUCT DESIGN UNLOADER SOLENOID • Compliant Scroll compressors are more tolerant of liquid refrigerant. A nominal 24-volt direct current coil activates the internal un- loader solenoid. The input control circuit voltage must be 18 to NOTE: Even though the compressor section of a Scroll 28 volt ac.
  • Page 26 PRODUCT DESIGN Communicating Unitary Control (UC) PCB speed condenser fan relays and the Active Protection compo- nent of enabled thermostats. The control is designed to work The Communicating System Unitary Control PCB is a micro- as part of a fully communicating HVAC system with 4 wires. processor-based control for heat pump and air conditioning The control also supports legacy 24VAC thermostat inputs for condensing units with single-phase compressors up to 5 ton...
  • Page 27 SYSTEM OPERATION COOLING HEATING The refrigerant used in the system is R-410A. It is a clear, The heating portion of the refrigeration cycle is similar to the colorless, non-toxic and non-irritating liquid. R-410A is a 50:50 cooling cycle. By energizing the reversing valve solenoid coil, blend of R-32 and R-125.
  • Page 28 SYSTEM OPERATION When the thermostat is satisfied, appropriate commands are sent to the UC control. The compressor relay and outdoor fan relay is de-energized. The compressor high stage solenoid is de-energized if it was energized. The UC control sends an appropriate command to the indoor unit to de-energize the indoor blower motor.
  • Page 29 SYSTEM OPERATION COOLING CYCLE Reversing Valve (Energized) Indoor Outdoor Coil Coil Accumulator Thermostatic Expansion Valve Bi-Flow Filter Dryer Check Valve HEATING CYCLE Reversing Valve (De-Energized) Indoor Outdoor Coil Coil Accumulator Thermostatic Expansion Valve Bi-Flow Filter Dryer Check Valve...
  • Page 30 EXPANSION VALVE/CHECK VALVE ASSEMBLY IN COOLING OPERATION IN HEATING OPERATION Most expansion valves used in current Daikin Brand Heat Pump products use an internally checked expansion valve. This type of expansion valve does not require an external check valve as shown above.
  • Page 31 TROUBLESHOOTING CHART COOLING/HP ANALYSIS CHART System Unsatisfactory Com plaint No Cooling Operating Cooling/Heating Pressures POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Pow er Failure Test Voltage • • • Blow n Fuse Inspect Fuse Size & Type •...
  • Page 32 SERVICING SERVICING TABLE OF CONTENTS S-21 CHECKING REVERSING VALVE AND SOLENOID..81 CHECKING VOLTAGE...........33 S-24 TESTING DEFROST CONTROL........81 CHECKING WIRING..........33 S-26 TESTING TEMPERATURE SENSORS S-3E CTK0*** COMFORTNETTM THERMOSTAT..33 CHECKING TRANSFORMER AND CONTROL (COMFORTNET READY MODELS ONLY)......82 CIRCUIT...............46 S-40A DVPTC/MBVC ELECTRONIC BLOWER/HEATER CONTROL..............82 CHECKING TIME DELAY RELAY......46 S-60...
  • Page 33 SERVICING CHECKING VOLTAGE NOTE: When operating electric heaters on voltages other than 240 volts, refer to the System Operation section on electric heaters to calculate temperature rise and air flow. Low voltage 1. Remove outer case, control panel cover, etc., from unit may cause insufficient heating.
  • Page 34 SERVICING Control Wiring indoor and outdoor units also interact with one another. The outdoor unit may send commands to or request information NOTE: Refer to section Electrical Connections - High Voltage from the indoor unit. This two-way digital communications be- Connections for 208/230 volt line connections to the air condi- tween the thermostat and subsystems (indoor/outdoor unit) tioner or heat pump.
  • Page 35 SERVICING ComfortNet™ System Advanced Features The ComfortNet™ system permits access to additional system information, advanced setup features, and advanced diag- nostic/troubleshooting features. These advanced features are organized into a menu structure. Refer to the Installation and Thermostat Start-Up instructions shipped with your particular CTKO*** thermostat.
  • Page 36 SERVICING Network Troubleshooting • Red communications LED – Indicates the status of the network. The table below indicates the LED status and the corresponding potential problem. The ComfortNet™ system is a fully communicating system, and thus, constitutes a network. Occasionally the need to trouble- •...
  • Page 37 SERVICING 7 SEGMENT LED DESCRIPTION OF CONDITION (characters will alternate) (no display) INTERNAL CONTROL FAULT / NO POWER STANDBY, WAITING FOR INPUTS HEATER KIT TOO LARGE, TOO SMALL, OR NO MATCH FUSE OPEN AUXILIARY SWITCH OPEN DATA NOT ON NETWORK INVALID DATA ON NETWORK INVALID MEMORY CARD DATA BLOWER MOTOR NOT RUNNING...
  • Page 38 SERVICING PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES SERVICING...
  • Page 39 SERVICING PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES...
  • Page 40 SERVICING PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES...
  • Page 41 SERVICING PCBJA101- PCBJA102 AIR HANDLER DIAGNOSTIC CODES...
  • Page 42 SERVICING PCBJA104 AIR HANDLER DIAGNOSTIC CODES...
  • Page 43 SERVICING PCBJA104 AIR HANDLER DIAGNOSTIC CODES...
  • Page 44 SERVICING PCBJA104 AIR HANDLER DIAGNOSTIC CODES...
  • Page 45 SERVICING PCBJA104 AIR HANDLER DIAGNOSTIC CODES...
  • Page 46 SERVICING Checking Transformer And control circuit 3. Using an ohmmeter, check for continuity across terminals 3 and 1, and 4 and 5. 4. Apply 24 volts to terminals H1 and H2. Check for continu- ity across other terminals - should test continuous. If not as above - replace.
  • Page 47 SERVICING CHECKING HIGH AND LOW VOLTAGE TO Checking Relay Contacts - PSC Fan Motor ECM MOTOR HIGH VOLTAGE! HIGH VOLTAGE! Disconnect ALL power before servicing Disconnect ALL power before servicing or installing. Multiple power sources or installing. Multiple power sources may be present.
  • Page 48 SERVICING S-10A Copeland Comfort Alert™ - Unitary (UC) Control Diagnostics Applies to DX16TC, DX18TC, DZ16TC, DZ18TC models HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death.
  • Page 49 PCBHR101-103 SERVICING PBBGR101-102...
  • Page 50 PCBHR101-103 SERVICING PBBGR101-102...
  • Page 51 PCBHR101-103 SERVICING PBBGR101-102...
  • Page 52 PCBHR101-103 SERVICING PBBGR101-102...
  • Page 53 PCBHR101-103 SERVICING PBBGR101-102...
  • Page 54 PCBHR104/PCBHR105 SERVICING 7 SEGMENT LED 7 SEGMENT LED DESCRIPTION OF CONDITION (DS2) (DS1) Low Pressure CO Trip Low Side Fault High Pressure CO Trip High Side Fault Short Cy cling Locked Rotor Open Circuit Open Start Circuit Open Run Circuit No Line Voltage Low Pilot Voltage Pow er Up...
  • Page 55 SERVICING PCBHR104 Integrated control Outdoor air Shorted sensor. Check sensor Turn power OFF prior module diagnostic/status temp sensor Open sensor. connection. to repair. LED display shows the fault Sensor Replace open/ Replace with correct indicated code. disconnected. shorted sensor. replacement part. Sensor out of displays ‘---‘...
  • Page 56 SERVICING PCBHR104 Air conditioner/heat pump Data not yet Air conditioner/ Verify Turn power OFF prior fails to operate. DATA heat pump is system type to repair. Integrated control wired as part of (communicating Use memory card for module diagnostic/status a communicating or legacy) LED display shows the system and...
  • Page 57 SERVICING PCBHR104 Air conditioner/heat pump Shared data sent Verify Turn power OFF prior fails to operate. Mis-match to integrated system type to repair. Integrated control module control module (communicating Use memory card for diagnostic/status LED does not match or legacy). display shows the indicated hardware Verify shared...
  • Page 58 SERVICING PCBHR104 Digit 3 Digit 2 Digit 1 Compressor and outdoor Low Pressure Low refr igerant Ve rify refr igerant Tu rn power OFF pr ior Cut Out charge . charge; adjust as to repai r. Low pressure s witch Loc kout Restr iction in needed.
  • Page 59 SERVICING PCBHR104 Digit 3 Digit 2 Digit 1 Run time f or last 4 cycles Shor t Cycling CMPR Intermittent Chec k ther mostat Tu rn power OFF pr ior is less than 3 minutes SHR T thermostat and ther mostat to repai r.
  • Page 60 SERVICING PCBHR104 Digit 3 Digit 2 Digit 1 Compressor and outdoor Open Star t Compressor star t Chec k Tu rn power OFF pr ior Circuit ST AR T winding is open. compressor ; to repai r Low pressure and high Loc kout Failed repair/replace as...
  • Page 61 SERVICING PCBHR104 Digit 2 Digit 1 Digit 3 Air conditioner/heat High Line High line Correct high line Tu rn power OFF pr ior pump may appear to be Voltage VO LT voltage voltage condition; to repai r. operating nor mally. contact local utility Control detects line Compressor protector...
  • Page 62 SERVICING Integrated control Outdoor air Shorted sensor. Check sensor Turn power OFF prior module diagnostic/status temp sensor Open sensor. connection. to repair. LED display shows the fault Sensor Replace open/ Replace with correct indicated code. disconnected. shorted sensor. replacement part. Sensor out of displays ‘---‘...
  • Page 63 SERVICING Air conditioner/heat pump Data not yet Air conditioner/ Verify Turn power OFF prior fails to operate. DATA heat pump is system type to repair. Integrated control wired as part of (communicating Use memory card for module diagnostic/status a communicating or legacy) LED display shows the system and...
  • Page 64 SERVICING Air conditioner/heat pump Shared data sent Verify Turn power OFF prior fails to operate. Mis-match to integrated system type to repair. Integrated control module control module (communicating Use memory card for diagnostic/status LED does not match or legacy). display shows the indicated hardware Verify shared Insert memory card...
  • Page 65 SERVICING Digit 3 Digit 2 Digit 1 Compressor and outdoor Low Pressure Low refr igerant Ve rify refr igerant Tu rn power OFF pr ior Cut Out charge . charge; adjust as to repai r. Low pressure s witch Loc kout Restr iction in needed.
  • Page 66 SERVICING Digit 3 Digit 2 Digit 1 Run time f or last 4 cycles Shor t Cycling CMPR Intermittent Chec k ther mostat Tu rn power OFF pr ior is less than 3 minutes SHR T thermostat and ther mostat to repai r.
  • Page 67 SERVICING Digit 3 Digit 2 Digit 1 Compressor and outdoor Open Star t Compressor star t Chec k Tu rn power OFF pr ior Circuit ST AR T winding is open. compressor ; to repai r Low pressure and high Loc kout Failed repair/replace as...
  • Page 68 SERVICING Digit 2 Digit 1 Digit 3 Air conditioner/heat High Line High line Correct high line Tu rn power OFF pr ior pump may appear to be Voltage VO LT voltage voltage condition; to repai r. operating nor mally. contact local utility Control detects line Compressor protector if needed.
  • Page 69 SERVICING S-12 CHECKING HIGH PRESSURE CONTROL Test for continuity using a VOM and if not as above, replace the control. S-14 CHECKING HIGH AND LOW PRESSURE SWITCH VOLTAGE HIGH VOLTAGE! The HPC and LPC are wired in series so output at both switches Disconnect ALL power before servicing should be the same when switches are closed voltage reading should be 6.5vdc or 8.0vac.
  • Page 70 SERVICING S-16G CHECKING EMERSON ULTRATECHTM ECM MOTORS DESCRIPTION The DVPTC and MBVC models utilize an Emerson, 4-wire variable speed ECM blower motor. The ECM blower motor provides constant CFM. The motor is a serially communicating variable speed motor. Only four wires are required to control the motor: +Vdc, Com- mon, Receive, and Transmit.
  • Page 71 SERVICING Emerson UltraCheck-EZ™ Diagnostic Tool Power Green Motor Indication(s) The Emerson UltraCheck-EZTM diaganostic tool may be used Button Action to diagnose the ECM motor. Confirm 24VAC to UltraCheck-EZ tool. If 24VAC is confirmed, Rotating HIGH VOLTAGE! diagnostic tool is Disconnect ALL power before servicing inoperable.
  • Page 72 SERVICING 4. Remove the (3) screws securing the control/end bell to the motor. Separate the control/end bell. Disconnect the 3-circuit harness from the control/end bell to remove the Lines 1 and 2 will be connected control/end bell from the motor. for 12OVAC Power Connector 5.
  • Page 73 SERVICING 1. Disconnect power to air handler or modular blower. Normal* +10% -10% Normal OFF ON OFF ON OFF ON OFF ON NOTE: Motor contains capacitors that can hold a charge for several minutes after disconnecting power. Wait 5 minutes after removing power to allow capacitors to discharge.
  • Page 74 SERVICING MBVC Airflow Table Htr Kw MBVC1200* MBVC1 6000* MBVC2000* Speed Selection Dip Switches Cool Adjust Profile Selection Selection Selection Switches Switches Switches 1000 1000 OFF OFF OFF OFF OFF 1000 1000 1200 1400 1500 1500 ON OFF 2000 Profiles Pre-Run Short-Run OFF Delay...
  • Page 75 BLOWER PERFORMANCE DATA SWITCH SWITCH SWITCH HTR kW MBVC1200* MBVC1600* MBVC2000* 1000 1000 1000 1000 1200 1400 1500 1500 2000 ^ Factory setting COOL SELECTION ADJUST SELECTION PROFILE SELECTION LOW STAGE HIGH STAGE SWITCHES SWITCHES SWITCHES MODEL COOL COOL MBVC1200 1000 1200 1000...
  • Page 76 SERVICING Speed Selection Dip Switches Cooling/Heat Pump Airflow Table Low stage High stage Cool Adjust Profile Continuous Model Speed tap Selection Selection Selection (CFM) (CFM) Switches Switches Switches Speed DV24PTCB14 OFF OFF OFF OFF OFF OFF ON 1125 DV30PTCC14 1020 Profiles Pre-Run Short-Run...
  • Page 77 SERVICING READY DVPTC AIRFLOW TABLES Cooling/Heat Pump Airflow Table Speed Selection Dip Switches MODEL Low Stage High Stage Cool Adjust Profile Continuous Selection Selection Selection Fan Speed Switches Switches Switches DV25PTCB14 1020 DV29PTCB14 DV37PTCB14 1085 Profiles Pre-Run Short-Run OFF Delay ------ ------ 60 sec/100%...
  • Page 78 SERVICING READY DVPTC AIRFLOW TABLES DIP SWITCH SETTING & AIRFLOW TABLE FOR ELECTRIC HEAT DV35PTCB14 DV25PTCB14 DV29PTCB14 DV33PTCC14 DV39PTCC14 DV49PTCC14 DV37PTCC14 DV59PTCC14 DV37PTCD14 DV59PTCD14 DV49PTCD14** DV61PTCD14*** DV31PTCC14 DV37PTCB14 (kW) ON ON ON ON ON OFF 1030 ON OFF ON 1110 1060 1150 ON OFF OFF...
  • Page 79 SERVICING S-17 CHECKING COMPRESSOR HIGH VOLTAGE! WARNING Disconnect ALL power before servicing or installing. Multiple power sources Hermetic compressor electrical terminal venting can may be present. Failure to do so may be dangerous. When insulating material which cause property damage, personal injury supports a hermetic compressor or electrical terminal or death.
  • Page 80 SERVICING 1. DO NOT remove protective terminal cover. Disconnect the three leads going to the compressor terminals at the nearest point to the compressor. 2. Identify the leads and using an ohmmeter on the R x 10,000 scale or the highest resistance scale on your ohm- meter check the resistance between each of the three leads separately to ground (such as an unpainted tube on the compressor).
  • Page 81 SERVICING S-21 CHECKING REVERSING VALVE AND SOLENOID 1. Remove unit wiring from disconnect switch and wire a test cord to the disconnect switch. Occasionally the reversing valve may stick in the heating or cooling position or in the mid-position. NOTE: The wire size of the test cord must equal the line wire size and the fuse must be of the proper size and type.
  • Page 82 SERVICING S-26 TESTING TEMPERATURE SENSORS Features (COMFORTNET READY MODELS ONLY) The new air handler control includes advanced diagnostic features with fault recall, estimated CFM display via on-board The DX16TC and DX18TC ComfortNet ready air conditioner LED, and ComfortNetTM ready. Diagnostics includes heater models are factory equipped with an outdoor air temperature kit selection diagnostics, open fuse, internal control fault, data (OAT) sensor.
  • Page 83 SERVICING WARNING Line Voltage now present. HIGH VOLTAGE! Disconnect ALL power before servicing or installing. Multiple power sources Data Line Voltage Troubleshooting and Bias may be present. Failure to do so may Switches cause property damage, personal injury or death. Proper data voltage is essential to robust and reliable commu- nication on the ComfortNet™...
  • Page 84 SERVICING SEQUENCE OF OPERATION 3.0 Continuous Fan Operation 3.1 With a demand for continuous fan operation, the CTK0* DVPTC/MBVC with DX**TC Condenser and CTK0* thermostat sends a fan request to the integrated air han- Communicating Themostat dler control along with a fan demand. The control energiz- es the variavble speed ECM motor at fan demand provided The DVPTC or MBVC air handle/modular blower matched by the thermostat.
  • Page 85 SERVICING 1.0 Cooling Operation - Low and High Stage Cool 2.8 The system operates at high stage heat pump heating. 1.1 The CTK0* thermostat sends a request for low stage 2.9 If the thermostat demand cannot be met on high stage cooling through the network to the unitary (UC) control in heat pump heating, the CTK0* thermostat sends a request the heat pump.
  • Page 86 SERVICING 4.0 Defrost Operation Other components such as a Heating/Cooling Thermostat and 4.1 While the system is operating in heat pump heating (see Outdoor Thermostats are available to complete the installa- 2.0 Heating Operation), the control in the outdoor unit tion.
  • Page 87 SERVICING ELECTRIC HEATER CAPACITY BTUH S-62 CHECKING HEATER ELEMENTS 14.2 19.5 21.0 WARNING BTUH 10200 16200 20400 23800 32400 48600 66500 71600 Disconnect ALL power before servicing. FORMULAS: Heating Output = KW x 3413 x Corr. Factor 1. Disassemble and remove the heating element. Actual CFM = CFM (from table) x Corr.
  • Page 88 SERVICING Copper to Steel Joints - Silver Solder used without a flux (alloy This is the most important part of the entire service procedure. of 30% silver, 38% copper, 32% zinc). Recommended heat - The life and efficiency of the equipment is dependent upon the 1200°F.
  • Page 89 SERVICING S-103 CHARGING When opening valves with retainers, open each valve only until WARNING the top of the stem is 1/8” from the retainer. To avoid loss of refrigerant, DO NOT apply pressure to the retainer. When REFRIGERANT UNDER PRESSURE! opening valves without a retainer remove service valve cap * Do not overcharge system with refrigerant.
  • Page 90 SERVICING S-108 SUPERHEAT 4. Disconnect manifold set, installation is complete. The expansion valves are factory adjusted to maintain 7 to 9 SUBCOOLING FORMULA = SATURATED LIQUID TEMP. - LIQUID degrees superheat of the suction gas. Before checking the LINE TEMP. superheat or replacing the valve, perform all the procedures outlined under Air Flow, Refrigerant Charge, Expansion Valve NOTE: Check the Schrader ports for leaks and tighten valve...
  • Page 91 SERVICING S-109 CHECKING SUBCOOLING S-112 CHECKING RESTRICTED LIQUID LINE Refrigerant liquid is considered subcooled when its tempera- When the system is operating, the liquid line is warm to the ture is lower than the saturation temperature corresponding touch. If the liquid line is restricted, a definite temperature to its pressure.
  • Page 92 SERVICING CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is broken or damaged scroll flanks on Scroll compressors, reducing the ability of the compressor to pump refrigerant vapor. The condition of the scroll flanks is checked in the following manner. 1.
  • Page 93 SERVICING Pressure vs. Temperature Chart R-410A PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F -37.7 37.8 74.3 100.2 120.7 137.6 114.0 216.0 318.0 420.0 522.0 -34.7 116.0 38.7 218.0 74.9 320.0 100.7 422.0 121.0 524.0 137.9 -32.0 118.0 39.5...
  • Page 94 SERVICING REQUIRED LIQUID LINE TEMPERATURE LIQUID PRESSURE REQUIRED SUBCOOLING TEMPERATURE (°F) AT SERVICE VALVE (PSIG)
  • Page 95 SERVICING S-115 COMPRESSOR BURNOUT 7. Continue to run the system for a minimum of twelve (12) hours and recheck the pressure drop across the drier. When a compressor burns out, high temperature develops Pressure drop should not exceed 6 PSIG. causing the refrigerant, oil and motor insulation to decompose 8.
  • Page 96 SERVICING Air Handler Static Pressure Readings S-203A Two Piece Air Handler External Static Pressure S-203 Single Piece Air Handler External Static To determine proper airflow, proceed as follows: Pressure 1. Using a Inclined Manometer or Magnehelic gauge, mea- To determine proper airflow, proceed as follows: sure the static pressure between the outlet of the evap- orator coil and the inlet of the air handler, this will be a 1.
  • Page 97 WIRING DIAGRAMS DV**PTC/MBVC HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 40 VA TRANS FORMER, SEE N OTE 1 230 VAC GRND GRND...
  • Page 98 WIRING DIAGRAMS HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. 3-Phase Heat Kit Wiring is subject to change. Always refer to the wiring digram on the unit for the most up-to-date wiring.
  • Page 99 WIRING DIAGRAMS DX16TC HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. OAT OCT Wiring is subject to change. Always refer to the wiring digram on the unit for the most up-to-date wiring.
  • Page 100 WIRING DIAGRAMS DX18TC HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. Wiring is subject to change. Always refer to the wiring digram on the unit for the most up-to-date wiring.
  • Page 101 WIRING DIAGRAMS DZ18TC HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING OR INSTALLING THIS UNIT. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH. Wiring is subject to change. Always refer to the wiring digram on the unit for the most up-to-date wiring.

This manual is also suitable for:

Comfortnet dx18tc seriesComfortnet dz16tc seriesComfortnet dz18tc seriesComfortnet dx16tc0601aaComfortnet dx16tc0241acComfortnet dx16tc0481ac ... Show all

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