Carrier 42QZA009DS-1 Service Manual
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Carrier 42QZA009DS-1 Service Manual

Light commercial multi type
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Light Commercial
SUPER INVERTER SERIES
MULTI TYPE
Service Manual 2017

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Summary of Contents for Carrier 42QZA009DS-1

  • Page 1 Light Commercial SUPER INVERTER SERIES MULTI TYPE Service Manual 2017...

  • Page 2: Table Of Contents

    CONTENTS 1. General information of Indoor Units ......1 Features ............... 2 Dimensions ..............12 Service Space (unit: mm) .......... 19 Wiring diagram ............22 Static Pressure (Duct) ..........28 Operation temperature range ........29 8. Electronic function ............30 9.
  • Page 3 ※The specifications, designs, and information in this book are subject to change without notice for product improvement.

  • Page 4: General Information Of Indoor Units

    1. General information of Indoor Units Four-way cassette (compact) Silm cassette Console A5 Ducted A6 Ducted 38QUS014DS2* 38QUS018DS2* 38QUS036DS4* 38QUS027DS3* 38QUS042DS5* Model Four-way Super slim cassette Console A5 Duct A6 Duct cassette 42QTD009DS* 42QTD024DS* 42QZA009DS* 42QHC007DS 42QSS012DS* 42QSS018DS* 38QUS014DS2* 42QTD012DS* 42QZA012DS* 42QHC009DS 42QSS024DS*...

  • Page 5: Features

    2. Features 2.1 Four-way cassette type(compact) ⑴ New panel  360° surrounding air outlet design, affords comfortable feeling ⑵ Compact design  The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for installation and will not damage the decoration. The panel size is 647×50×647mm. ...
  • Page 6 Fresh Dimension:Φ75mm ⑸ Air passage function  Reserves the space for air outlet from the side of indoor unit; It’s availed to connect air duct from the two sides to the nearby small rooms.
  • Page 7 2.2 A5 Duct ⑴ Installation accessories: (Optional)  Front Board, Canvas Air Passage, Filter, Panel, for easy installation Filter Panel Front Board ⑵ Easy Installation: Two air inlet styles (Bottom side or Rear side)  Air inlet from rear is standard for all capacity; air inlet from bottom is optional. ...
  • Page 8  Replace the motor or centrifugal fan Remove the ventilated panel firstly. Remove a half of blower housing and take out the motor with centrifugal fan. Directly remove two bolts, and then replace the motor or centrifugal fan easily. Motor Blower Housing Ventilated Panel ⑸...
  • Page 9 Remote on-off ports Central control ports ⑹ Built-in drain pump (Optional):  Built-in drain pump can lift the water to 750mm upmost. It’s convenient to install drainage piping under most space condition. ⑺ Built-in display board  The standard indoor unit can be controlled by wired controller. ...
  • Page 10 Wired Controller (Standard) Remote Controller (Optional) Display 2.3 Console (1) Consumes up to 30% less energy than non-inverter units ——DC inverter compressor ——indoor fan motor adopts DC motor (2) Achieves set temperature more quickly ——air supplying from top and bottom or from top only ——air inlet from four directions (3) Compact unit body, space saving ——this unit body is very thin and harmonious with room.
  • Page 11 (8) Easy cleaning grille and maintenance (9) Indoor unit adopts DC motor, it has five level fan speed meet different requirements. Super slim cassette (1) Overview  Compact design, super slim body size, less space requiring in installation  Each louver can be separately controlled, more comfort air blowing is possible. ...
  • Page 12 (4) External air duct design  Reserve external air duct, more flexible for the air supply. (5) Built-in draining pump  Due to the improvement of structure, more convenient to repair or replace the draining pump. Draining Pump  Built-in draining pump to make sure condensed water drain out reliably. (6) Terminals for alarm lamp and long-distance on-off controller connection are standard ...
  • Page 13 Alarm lamp Long-distance on-off controller Ceiling-Floor (1) New design, more modern and elegant appearance. (2) Convenient installation --The ceiling type can be easily installed into a corner of the ceiling even if the ceiling is very narrow --It is especially useful when installation of an air conditioner in the center of the ceiling is impossible due to a structure such as one lighting.
  • Page 14 (5) Easy operation. (6) Remote control and optional wired control method.

  • Page 15: Dimensions

    3. Dimensions 3.1 Four-way cassette type (compact): Drain hole Gas side ( for Service ) Liquid side Body 4-install hanger 150 Distribution duct E-parts box 4-Screw hole (for install panel) Drain pipe Fresh air intake Wiring connection port Panel...
  • Page 16 3.2 A5 Duct a i r i n l e t f r o m r e a r s i d e A i r f i l t e r o p t i o n a l 4 - i n s t a l l h a n g e r L i q u i d...
  • Page 17 3.3 Console Hanging arm 16 Drain pipe...
  • Page 18 3.4 Super-Slim Cassette Type 92 92 Fresh air intake 4-install hanger Body Gas side Liquid side Wiring connection port E-parts box Service hole for Test mouth & Test cover draining pump Drain hole 92 92 92 92 Panel Unit: mm Model 42QTD024DS*...
  • Page 19 3.5 Ceiling &Floor Type Wiring connection port Drain discharge port Fresh air intake Refrigerant pipe hole Hanging arm Capacity (KBtu/h) 18/24 1068...
  • Page 20 3.6 A6 Duct Model unit (KBtu/h) inch 34.65 8.27 26.54 23.62 5.51 27.80 1.97 5.35 30.79 7.48 1.57 36.22 20.00 3.07 5.83 3.46 4.41...
  • Page 21 3.7 Hi-wall 3.7.1 Indoor Unit Model (KBtu/h) 42QHC007DS* 42QHC009DS* 42QHC012DS* 42QHC018DS* 42QHC024DS* 1082...

  • Page 22: Service Space (Unit: Mm)

    4. Service Space (unit: mm) 4.1 Four-way cassette (compact) 4.2 Duct Ensure enough space required for installation and maintenance . All the indoor units reserve the hole to joint the fresh air pipe. The hole size as following:...
  • Page 23 Ne cessary roo m Drain sid out let intle t outlet Chart 1 ground No te: 180 00-24000Btu/h(R 22) Series A 26 0mm ≥ 36000-48000Btu/h(R 22) Series A 330mm ≥ 4.3 Console Hook Body Ceiling 880mm Panel Chart 2 No te: 180 00- 24000B tu/h(R 22) Seri es B= 240mm 360 00- 48000Btu /h(R 22)
  • Page 24 4.5 Ceiling &Floor Type 4.6 Hi-wall...

  • Page 25: Wiring Diagram

    Wiring diagram 38QUS014DS2* 38QUS018DS2*...
  • Page 26 38QUS027DS3* 38QUS036DS4*...
  • Page 27 38QUS042DS5* 42QHC009DS*、42QHC012DS*、42QHC018DS*、42QHC024DS* 16022000A83297...
  • Page 28 42QTD009DS* 、42QTD012DS* 、42QTD018DS* 42QTD024DS*...
  • Page 29 42QSS012DS* 42QSS018DS*, 42QSS024DS*...
  • Page 30 42QZA009DS*, 42QZA012DS*, 42QZA018DS*...

  • Page 31: Static Pressure (Duct)

    Static Pressure (Duct) 42QSS012DS*...

  • Page 32: Operation Temperature Range

    Operation temperature range Temperature Cooling operation Heating operation Drying operation Mode Room temperature 18℃～32℃ 0℃～27℃ 18℃～32℃ Outdoor temperature 0℃～46℃ -15℃～24℃ 0℃～46℃ CAUTION: 1. If the air conditioner is used beyond the above conditions, certain safety protection features may come into operation and cause the unit to operate abnormally. 2.

  • Page 33: Electronic Function

    Electronic function Note: Below function only for light commercial, for Hi-wall units, please refer to 1 drive 1 service manuals. 8.1 Abbreviation T1: Indoor room temperature T2: Indoor evaporator temperature T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature...
  • Page 34 8.2.4 Super slim cassette 8.2.5 Ceiling& floor 8.2.6 15C 8.3 Main Protection 8.3.1 Three minutes delay at restart for compressor. 8.3.2 Sensor protection at open circuit and breaking disconnection. 8.3.3 Indoor fan delayed open function...
  • Page 35 ----When system starts up, the louver will be active immediately, and the indoor fan will open after certain time. ----If the system runs in heating mode, the anti-cold wind function has priority. 8.3.4 Fan speed is out of control (For the units used DC fan motor) For console: When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure.
  • Page 36 While A,B,C…means different fan speed of outdoor unit. 8.4.2.2 Indoor fan running rules For all models: In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low and auto. When the compressor is running, the indoor fan is controlled as below: Setting fan T1-Td ℃(°...
  • Page 37 8.4.3 Dry mode 8.4.3.1 Indoor fan speed is fixed at breeze and can’t be changed. The louver angle is the same as in cooling mode. 8.4.3.2 Low indoor room temperature protection In drying mode, if room temperature is lower than 10℃, the indoor fan will stop and not resume until room temperature exceeds 12℃.
  • Page 38 Auto fan action in heating mode: T1-Td (H+-L)*0.2+L (H+-L)*0.4+L (H+-L)*0.6+L (H+-L)*0.6+L (H+-L)*0.8+L 8.4.4.3 High evaporator coil temp.T2 protection: If T2>63℃, the indoor unit has no capacity demand and resume till 48℃. 8.4.4.4 Prevent Over-Heating In heating mode, when the indoor unit has no capacity requirement due to indoor room temperature increased, the Indoor fan will run in super breeze.
  • Page 39 4-Way valve no longer than 10min Compressor Cool-F9 TimeA 10S 30S Indoor fan Anti cold wind Outdoor fan PMV running 4 mins with 480P 480P 8.4.5 Auto-mode This mode can be chosen by remote controller and the setting temperature can be changed between 17~30℃.
  • Page 40 Forced cooling mode: The compressor runs at F2 frequency and indoor fan runs as breeze. After running for 30 minutes. the machine will turn to auto mode as 24℃ setting temperature. Forced auto mode: The action of forced auto mode is the same as normal auto mode with 24℃ setting temperature. 8.4.6.4 When there’s indoor unit running in forced cooling, it is the master forced cooling unit.
  • Page 41 8.4.8.4 Timer off and remote controller off signals have the priority compared with sleep function. 8.4.9 Auto-Restart function The indoor unit is equipped with auto-restart function, which is carried out through an auto-restart module. In case of a sudden power failure, the module memorizes the setting conditions before the power failure. The unit will resume the previous operation setting (not including swing function) automatically after 3 minutes when power returns.
  • Page 42 same as that from wireless remote controller, but buzzer will not emit a sound. When the PCB receives turning-off follow-me signal from wired remote controller, the unit will quit follow-me function at once. The follow-me function controlled by wired remote controller prevails that by wireless remote controller. 8.4.12 Mode conflict The indoor units can not work cooling mode and heating at same time.

  • Page 43: General Information Of Outdoor Units

    General information of Outdoor Units Model name Dimension (mm) Compressor 38QUS014DS2* ASN108D22UEZ 800x333x554 38QUS018DS2* ASM135D23UFZ 845x363x702 38QUS027DS3* ATF235D22UMT 845x363x702 38QUS036DS4* ATF310D43UMT 946x410x810 38QUS042DS5* ATF310D43UMT 946x410x810...

  • Page 44: Features

    Features Outdoor unit Power relay control Low noise air flow system Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode. 4 way valve control It is only operated in the heating operation mode except defrosting operation. Anti-rust cabinet Valve protection cover It protects the valves and prevents water from dripping.

  • Page 45: Dimensions

    Dimensions Unit：mm Model 38QUS014DS2* 38QUS018DS2* 38QUS027DS3* 38QUS036DS4* 1034 38QUS042DS5* 1034...

  • Page 46: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram 12.1 Refrigeration circuit drawing of inverter 1 drive 2 type INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A CHECK VALVE EXV B CAPILLARY B LIQUID VALVE B Condenser temp. sensor CAPILLARY TUBE HEAT HEAT EXCHANGE T4 Ambient T1 Room EXCHANGE (EVAPORATOR)
  • Page 47 12.3 Refrigeration circuit drawing of inverter 1 drive 4 type INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A EXV B CAPILLARY B LIQUID VALVE B CHECK VALVE EXV C CAPILLARY C LIQUID VALVE C Condenser temp. sensor EXV D CAPILLARY D CAPILLARY TUBE LIQUID VALVE D HEAT...

  • Page 48: Wiring Diagram

    Wiring diagram 38QUS014DS2*, 38QUS018DS2*...
  • Page 49 Note: S(1)&S(2) are used in other type of models. They don't need to be connected in multi models. 38QUS027DS3*...
  • Page 50 38QUS036DS4*...
  • Page 51 38QUS042DS5*...

  • Page 52: Indoor Units Combination

    Indoor units combination 14.1 Indoor unit combination for 38QUS014DS2* 14K 1 Drive 2 Two Unit 14.2 Indoor unit combination for 38QUS018DS2* 18K 1 Drive 2 One Unit Two Unit 9+12 12+12 9+18* * means two indoor unit shall not operate simultaneously due to performance reduction. 14.3 Indoor unit combination for 38QUS027DS3* 27K 1 Drive 3 One Unit...

  • Page 53: Sound Levels

    15 Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) 38QUS014DS2* 38QUS018DS2* 59.5 38QUS027DS3* 38QUS036DS4* 38QUS042DS5*...

  • Page 54: Installation Details

    16 Installation Details 16.1.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque N.cm N.cm Ф6.35 1500(153kgf.cm) 1600(163kgf.cm) Ф9.52 2500(255kgf.cm) 2600(265kgf.cm) Ф12.7 3500(357kgf.cm) 3600(367kgf.cm) 16.1.2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet. Rated current of appliance Nominal cross-sectional area (mm²...
  • Page 55 ● When refrigerant pipe diameter is different from that of outdoor unit union (for 18K&24K indoor unit), additional transfer connector needs to be used on outdoor unit union. Indoor unit Extension pipe diameter (mm/inch) Model Pipe diameter (mm/inch) Liquid 6.35(1/4) Liquid 6.35(1/4) 7K9K12K...
  • Page 56 (Indoor unit) (Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Close Manifold valve Compound meter Pressure gauge -0.1MPa Handle Lo Handle Hi Charge hose Charge hose Vacuum pump Vacuum pump 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the 2-way and 3-way valves are set to the closed position.
  • Page 57 2. Adding the refrigerant if the pipe length >5m Electronic scale Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve. Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.
  • Page 58 16.1.5 Adding the refrigerant after running the system for many years Electronic scale Procedure: 1). Connect the charge hose to the 3-way service port, open the 2-way valve and the 3-way valve. Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R410A, make the cylinder bottom up to ensure liquid charge.
  • Page 59 16.1.6 Re-installation while the indoor unit need to be repaired 1. Collecting the refrigerant into the outdoor unit Procedure 1). Confirm that both the 2-way and 3-way valves are set to the opened position Remove the valve stem caps and confirm that the valve stems are in the opened position. Be sure to use a hexagonal wrench to operate the valve stems.
  • Page 60 16.1.7 Re-installation while the outdoor unit need to be repaired 1. Evacuation for the whole system Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the opened position. 2). Connect the vacuum pump to 3-way valve’s service port. 3).
  • Page 61 2. Refrigerant charging Procedure: 1). Connect the charge hose to the charging cylinder, open the 2-way valve and the 3-way valve Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder.

  • Page 62: Electronic Control Function

    Electronic control function 17.1 Abbreviation T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet(This sensor is located in outdoor unit) T3: Coil temperature of outdoor heat exchanger T4: Outdoor ambient temperature T5: Compressor discharge temperature Ts: Setting temperature 17.2 Electric control working environment.
  • Page 63 17.4 Outdoor unit point check function There is a check switch in outdoor PCB. Press the switch N times it will display the content corresponding to No. N. After getting into the check function, it will display No. N with 1.5s, meanwhile the low bit decimal of digit display flashing, indicated to get into the check function display.
  • Page 64 For example ,the digital display tube show “Cd”, it means AD value is AD value of voltage 205. EXV open angle for A indoor unit Actual data/4. EXV open angle for B indoor unit If the value is higher than 99, the digital display tube will show single EXV open angle for C indoor unit digit and tens digit.
  • Page 65 17.5.4 Compressor current limit protection Temperature interval.of current limit is same as range of T4 limited frequency. Cooling mode: CoolZone5 CoolZone4 CoolZone3 CoolZone2 CoolZone1 Heating mode: HeatZone4 HeatZone3 HeatZone2 HeatZone1 17.5.5 Indoor / outdoor units communication protection If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes, the AC will stop and display the failure.
  • Page 66 If the outdoor ambient is higher than setting frequency during the oil return, the AC quit oil return. 17.5.9 Low outdoor ambient temperature protection When compressor is off, T4 is be lower than -35℃.for 10s, the AC will stop and display “LP”. When compressor is on, T4 is be lower than -40℃.for 10s, the AC will stop and display “LP”.

  • Page 67: Troubleshooting

    18 Troubleshooting 18.1 Indoor unit error code explanation: For Console Operation Lamp Malfunction Timer Lamp (flashes) Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units Indoor fan speed has been out of control Open or short circuit of T1 temperature sensor Open or short circuit of T2 temperature sensor Overcurrent protection (For some units) Open or short circuit of T4 temperature sensor...

  • Page 68: Ipm Module Malfunction

    slim cassette with auto-lifting panel) Auto-lifting panel is faulty (For slim cassette with auto-lifting panel) Auto-lifting panel is not closed (For slim cassette with auto-lifting panel) ☆ IPM module malfunction ☆ Over voltage or over low voltage protection ☆ Too low ambient temperature protection ☆...
  • Page 69 Note: Once these error codes display, they will disappear in at least 30 seconds if the unit come back to normal.(Except E2&E3)

  • Page 70: Indoor Eeprom Malfunction E0

    Trouble shooting 18.3 18.3.1 For the indoor unit 18.3.1.1 Indoor EEPROM malfunction Power off, then restart the unit 2 minutes later Replace the indoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 71 18.3.1.2 Indoor / outdoor units communication error Indoor / outdoor units communication error Start: Power off , then Power on the A/C by the Breaker. (reconnect the power wire). Is it still displaying the error code? Check wiring on the outdoor and indoor terminal follow the wiring diagram.
  • Page 72 Pic 1: check the voltage of N to S (Vs), is it moving alternately between positive value and negative value? Pic 2: IPM or outdoor main PCB Operating Self-Check Pic 2: IPM or outdoor main PCB Power, Self-Check Operating els)
  • Page 73 PIC3 : Main board LED when power on and unit standby. PIC 4: check point button, Press 1 time for check how many indoor units are connected...

  • Page 74: Indoor Fan Speed Has Been Out Of Control E3

    18.3.1.3 indoor unit fan speed has been out of control Power off, then restart the Power off, then restart the unit 2 minutes later. Is it still The unit operates normally. unit 2 minutes later. Is it still The unit operates normally. displaying the error code? displaying the error code? Find out the cause and...
  • Page 75 For console: DC motor voltage input and output For split type: Color Signal Voltage Vs/Vm 280V~380V Black White 14-17.5V Yellow 0~5.6V Blue 14-17.5V For other types: Color Signal Voltage Vs/Vm 192V~380V Black White 13.5-16.5V Yellow 0~6.5V Blue 13.5-16.5V...

  • Page 76: Open Or Short Circuit Of T1 Temperature Sensor E4

    18.3.1.4 Open or short circuit of temperature sensor. Check the connections Check the connections between temperature between temperature Correct the connections. Correct the connections. sensor and PCB. Are the sensor and PCB. Are the connections good? connections good? Measure the resistance value Measure the resistance value of the sensor via Appendix 1 of the sensor via Appendix 1...
  • Page 77 18.3.2 For the super-slim cassette with up-down panel 18.3.2.1 Communication error between indoor unit and up-down panel F0 Displayed F0 Displayed Communication failure between Communication failure between indoor unit and up-down panel indoor unit and up-down panel Check the wire connection Check the wire connection between up-down panel and Correct the connection...

  • Page 78: Outdoor Eeprom Malfunction (For Some Units)

    18.3.3 For the outdoor unit 18.3.3.1 Outdoor EEPROM malfunction(ODU E0) Power off, then restart the Power off, then restart the unit 2 minutes later unit 2 minutes later Replace the outdoor main PCB Replace the outdoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
  • Page 79 18.3.3.2 Communication malfunction between IPM board and outdoor main board(ODU E3) E3 display Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? Check the signal wire between the IPM board and the main board, is it connected good? Reconnect and retry.
  • Page 80 18.3.3.3 Voltage protection(ODU E5) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(L1) and N (L2) is about 220~240VAC Check whether the voltage of IPM board P and N is normal? DC277-356V for 18-27KBtu/h;...
  • Page 81 18.3.3.4 Outdoor unit fan speed has been out of control (E8) Power off, then restart the Power off, then restart the unit 2 minutes later. Is it still The unit operates normally. unit 2 minutes later. Is it still The unit operates normally. displaying the error code? displaying the error code? Find out the cause and...
  • Page 82 18.3.3.5 High pressure protection (ODU P1)(For 38QUS036DS4*, 38QUS042DS5*) High pressure protection High pressure protection Whether the wiring Whether the wiring between the high pressure between the high pressure switch and main control switch and main control Connect it well Connect it well board is connected well or board is connected well or correctly...
  • Page 83 18.3.3.6 Low pressure protection (ODU P2)(For38QUS036DS4*, 38QUS042DS5*) Low pressure protection Low pressure protection Whether the wiring Whether the wiring between the low pressure between the low pressure protector and main control Connect it well protector and main control Connect it well board is connected well or board is connected well or correctly...
  • Page 84 18.3.3.7 Current protection of compressor (ODU P3) Current protection of compressor Judge 1: Check whether the input current of the power supply wire is higher than max protection current value Check whether the refrigerant system is ok Judge 2: Check whether the outdoor ambient Stop the unit temperature is higher than...
  • Page 85 18.3.3.8 Temperature protection of compressor discharge (ODU P4) Temperature protection of Temperature protection of compressor discharge compressor discharge Check whether the Check whether the Check whether the Check whether the compressor discharge temp. is compressor discharge temp. is Stop leaking and add refrigerant Stop leaking and add refrigerant refrigerant is leak refrigerant is leak...
  • Page 86 18.3.3.9 High temperature protection of condenser (ODU P5) When outdoor pipe temperature is more than 65° C, the unit will stop, and unit runs again when outdoor pipe temperature less than 52° C. Check the connection Check the connection between temperature Correct the connection between temperature Correct the connection...
  • Page 87 18.3.3.10 IPM module protection (ODU P6) IPM module protection Check whether the voltage range Check whether the input Regulate it to correct, then of P-N on IPM module is normal? power supply is correct? check whether the system DC277-356V for 18-28KBtu/h; 208-230V, 1N, 60Hz can work normally? DC277-410V for 36-42KBtu/h...
  • Page 88 18.4 Main parts check Spec. Indoor unit 9K/12K/18K/24K 9K/12K/18K 9K/12K 18K/24K Model Cassette Console Ducted Indoor fan motor ZKFP-46-8-1 ZKFP-20-8-2 ZKFN-55-8-1 ZKFN-55-8-1 18K/24K Model Cassette Ducted Indoor fan motor ZKFP-124-8-2 ZKFN-160-8-1-2 Outdoor unit Model 1x2(14k) 1x2(18k) 1x3(21K) 1x3(27K) Compressor ASN108D22UEZ ASM135D23UFZ ASM135D23UFZ ATF235D22UMT...
  • Page 89 1. Temperature sensor checking Disconnect the temperature sensor from PCB, measure the resistance value with a tester. Temperature Sensors. Room temp.(T1) sensor, Indoor coil temp.(T2) sensor, Outdoor coil temp.(T3) sensor, Outdoor ambient temp.(T4) sensor, Compressor discharge temp.(T5) sensor. Measure the resistance value of each winding by using the multi-meter.
  • Page 90 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4,T2B (℃--K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190...
  • Page 91 Appendix 2 Temperature Sensor Resistance Value Table for T5 (℃--K) ℃ K Ohm ℃ K Ohm ℃ K Ohm ℃ K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37 11.79 3.296 406.7 54.89...
  • Page 92 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue - 1.57Ω(20℃) 1.75Ω(20℃) 0.75Ω(20℃) 0.65Ω(20℃)
  • Page 93 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...

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