Carrier 42QHC009DS Service Manual
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Carrier 42QHC009DS Service Manual

15c inverter series
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15C Inverter Series
Service Manual

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Summary of Contents for Carrier 42QHC009DS

  • Page 1 15C Inverter Series Service Manual...

  • Page 2: Table Of Contents

    CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Function ................................ 4 3. Dimension ..............................5 3.1 Indoor Unit ............................. 5 3.2 Outdoor Unit ..........................7 4. Wiring Diagram ............................8 5. Refrigerant Cycle Diagram ........................10 6.

  • Page 3: Precaution

    installing the product. Sharp edges could cause injury, be especially 1. Precaution careful of the case edges and the fins on the condenser and evaporator. 1.1 Safety Precaution  For installation, always contact the dealer or an authorized service center. ...
  • Page 4 from product, turn the breaker off or water is drained away properly. disconnect the power supply cable. A bad connection may cause water leakage.  There is risk of electric shock or fire. Keep level even when installing the  Stop operation and close the window product.
  • Page 5 through air inlet or outlet while the product is operated.  Do not drink the water drained from the product.  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.  Replace the all batteries in the remote control with new ones of the same type.

  • Page 6: Function

    2. Function Model Names of Indoor/Outdoor Units Capacity Indoor units Outdoor units 42QHC009DS/42QHC009ES 38QHC009DS/38QHC009ES 42QHC012DS/42QHC012ES 38QHC012DS/38QHC012ES 42QHC018DS/42QHC018ES 38QHC018DS/38QHC018ES 42QHC024DS/42QHC024ES 38QHC024DS/38QHC024ES 2 ways of drainage Filter Cold catalyst filter Louver Position Memory Function Super Ionizer(O) Refrigerant Leakage Detect Silver Ico Filter(O) Self-diag.

  • Page 7: Dimension

    3. Dimension 3.1 Indoor Unit Model 42QHC009 42QHC012 42QHC018 42QHC024 1082...
  • Page 8 For 42QHC009， For 42QHC012， For 42QHC018， For 42QHC024，...

  • Page 9: Outdoor Unit

    3.2 Outdoor Unit Mounting Dimentsion(mm) Outdoor Unit Dimentsion(mm) Outdoor Unit 38QHC009DS 38QHC012DS 38QHC009ES 38QHC018DS 38QHC012ES/38QHC018ES 38QHC024DS/38QHC024ES...

  • Page 10: Wiring Diagram

    Wiring Diagram The “W” is for system 1 watt consumption standby control, the “W” cable is the power line for outdoor unit. When the unit is turned off, the system will turn off outdoor power by the relay in the indoor unit to reduce power consumption.
  • Page 11 Indoor (42QHC009/42QHC012/42QHC018/42QHC024)

  • Page 12: Refrigerant Cycle Diagram

    5. Refrigerant Cycle Diagram INDOOR OUTDOOR CHECK VALVE LIQUID SIDE (Heating Model only) 2-WAY VALVE CAPILIARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) T1 Room temp. sensor T2 Evaporator temp. sensor GAS SIDE 4-WAY VALVE 3-WAY VALVE ACCUMULATOR COOLING COMPRESSOR HEATING...

  • Page 13: Installation Details

    6. Installation Details 6.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque inch 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) Ф15.9 4500(459kgf.cm) 4700(479kgf.cm) Ф19 6500(663kgf.cm) 6700(683kgf.cm) 6.2 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 14: Pipe Length And The Elevation

    6.3 Pipe length and the elevation The pipe length and refrigerant amount: Standard Max. Max. Additional Pipe size Model length Elevation Length refrigerant Liquid B (m) A (m) (g/m) 3/8’’(Ф9.52) 1/4’’(Ф6.35) 42QHC009+ 38QHC009 3/8’’(Ф9.52) 1/4’’(Ф6.35) 42QHC012+ 38QHC012 1/4’’(Ф6.35) 42QHC018+ 38QHC018 1/2’’(Ф12.7) 3/8’’(Ф9.52) 42QHC024+ 38QHC024...

  • Page 15: Installation For The First Time

    connection to the vacuum pump. 6.4 Installation for the first time 4) Fully open the handle Lo of the manifold valve. Air and moisture in the refrigerant system have 5) Operate the vacuum pump to evacuate. undesirable effects as below: 6) Make evacuation for 30 minutes and check ●...

  • Page 16: Adding The Refrigerant After Running The System For Many Years

    disconnected from the vacuum pump to the liquid charge. valve at the bottom of the cylinder. If the 2). Purge the air from the charge hose. refrigerant is R410A, make the cylinder bottom Open the valve at the bottom of the cylinder up to ensure the liquid charge.

  • Page 17: Re-Installation While The Outdoor Unit Need To Be Repaired

    Be sure to use a hexagonal wrench to operate the turn off the vacuum pump, and confirm that the valve stems. gauge needle does not move (approximately 5 2). Connect the charge hose with the push pin of minutes after turning off the vacuum pump). handle lo to the 3-way valves gas service port.
  • Page 18 If the system has been charged with liquid refrigerant while operating the air conditioner, turn off the air conditioner before disconnecting the hose. 6). Mounted the valve stem caps and the service port. Use torque wrench to tighten the service port cap to a torque of 18N.m.

  • Page 19: Operation Characteristics

    7. Operation Characteristics Mode Cooling operation Heating Temperature operation Room temperature 18℃~32℃ 0℃~27℃ Outdoor temperature -15℃~46℃ -15℃~24℃ (For the models with low temperature cooling system) 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.

  • Page 20: Electronic Function

    Dispalys ‘ ’ during self clean operation (if 8. Electronic function aplicable). 8.1 Abbreviation Dispalys ‘ ’ under 8 heating operation (if T1: Indoor room temperature aplicable). T2: Coil temperature of evaporator When ECO function(optional) is actived,the T3: Coil temperature of condenser “...

  • Page 21: Main Protection

    8.3 Main Protection 8.3.1 Three minutes delay at restart for 8.3.9 Refrigerant leakage detection compressor This function is only active in cooling mode. It 1 minute delay for the 1 time stand-up and 3 can better prevent the compressor being minutes delay for others.

  • Page 22: Operation Modes And Functions

    8.4 Operation Modes and Functions 8.4.1 Fan mode ( 1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) Indoor fan can be set to high/med/low/auto. (4) The louver operates same as in cooling mode.
  • Page 23 TP3+5 Decrease Hold TP3-3 Resume 8.4.3.3 Indoor fan running rules When the compressor is on, the indoor fan can ---TP3<T3< TP3+5, the compressor frequency be set to high/med/low/auto. And the anti-cold will decrease to the lower level until to F1 and wind function has the priority.
  • Page 24 normal heating mode. machine will choose running function again. ----T3 rises to be higher than TCDE1℃. ----T3 keeps to be higher than TCDE2℃ for 80 8.4.5 Drying mode Indoor fan speed is fixed at breeze and can’t be seconds. ----The machine has run for 15 minutes in changed.
  • Page 25 8.4.7.8 The AC will quit the timer function when it has malfunction. 8.4.11 Louver Position Memory Function When starting the unit again after shutting down, 8.4.8 Economy function its louver will restore to the angle originally set 8.4.8.1 The sleep function is available in by the user, but the precondition is that the cooling, heating or auto mode.
  • Page 26 sensor will be still valid. When the follow me function is available, the PCB will control the unit according to the room temperature from the remote controller and the setting temperature. The PCB will take action to the mode change information from remote controller signal, but it will not affected by the setting temperature.
  • Page 27 8.4.16 Point check function Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds.
  • Page 28 Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1. All the displaying temperature is actual T2B,TP,TH, 1b,-1A value. Targeted -19—99 -19—99 2. All the temperature is ° C no matter what A0,A1,…A9 Frequency, kind of remote controller is used. 100,101,…109 b0,b1,…b9 110,111,…119...

  • Page 29: Troubleshooting

    9. Troubleshooting Safety Electricity power is still kept in capacitors even the power supply is shut off. Do not forget to discharge the electricity power in capacitor. Electrolytic Capacitors (HIGH VOLTAGE! CAUTION!) For other models, please connect discharge resistance (approx.100Ω 40W) or soldering iron (plug) between +, - terminals of the electrolytic capacitor on the contrary side of the outdoor PCB.

  • Page 30: Indoor Unit Error Display

    9.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error ☆ 2 times Indoor / outdoor units communication error ☆ 4 times Indoor fan speed has been out of control Indoor room temperature sensor T1 open circuit or short ☆...

  • Page 31: Trouble Shooting

    9.2 Trouble shooting 9.2.1 EEPROM parameter error diagnosis and solution(E0/F4) E0/F4 Error Code Malfunction decision Indoor or outdoor PCB main chip does not receive feedback conditions from EEPROM chip. Supposed causes Installation mistake ● PCB faulty ● Trouble shooting: Power off, then restart the unit 2 minutes later.
  • Page 32 9.2.2 Indoor / outdoor unit’s communication diagnosis and solution(E1) Error Code Malfunction decision Indoor unit does not receive the feedback from outdoor unit during conditions 110 seconds and this condition happens four times continuously. Supposed causes Wiring mistake ● Indoor or outdoor PCB faulty ●...
  • Page 33 Remark: Use a multi meter to test the resistance of the reactor which does not connect with capacitor. The normal value should be around zero ohm. Otherwise, the reactor must have malfunction and need to be replaced.
  • Page 34 9.2.3 Fan speed has been out of control diagnosis and solution(E3) Error Code Malfunction decision When indoor fan speed keeps too low (300RPM) for certain time, conditions the unit will stop and the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 35 Index1: 1:Indoor or Outdoor DC Fan Motor(control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.
  • Page 36 9.2.4 Refrigerant Leakage Detection diagnosis and solution(EC) Error Code Malfunction decision Define the evaporator coil temp.T2 of the compressor just starts conditions running as Tcool. In the beginning 5 minutes after the compressor starts up, if T2 ＜Tcool－2℃ does not keep continuous 4 seconds and this situation happens 3 times, the display area will show “EC”...
  • Page 37 9.2.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5) E4/E5/F1/F2/F3 Error Code Malfunction decision If the sampling voltage is lower than 0.06V or higher than 4.94V, conditions the LED will display the failure. Supposed causes Wiring mistake ●...
  • Page 38 9.2.6 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0) Error Code Malfunction decision When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P0” and AC will turn off. conditions Supposed causes Wiring mistake ●...
  • Page 39 9.2.7 Over voltage or too low voltage protection diagnosis and solution(P1) Error Code Malfunction decision An abnormal voltage rise or drop is detected by checking the conditions specified voltage detection circuit. Supposed causes Power supply problems. ● System leakage or block ●...

  • Page 40: Trouble Shooting

    9.2.8 High temperature protection of compressor top diagnosis and solution(P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Supposed causes Power supply problems. ● System leakage or block ● PCB faulty ●...
  • Page 41 9.2.9 Inverter compressor drive error diagnosis and solution(P4) Error Code Malfunction decision An abnormal inverter compressor drive is detected by a special conditions detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on. Supposed causes Wiring mistake ●...
  • Page 42 Main parts check 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 43 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (° C--K) ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148...
  • Page 44 Appendix 2 Temperature Sensor Resistance Value Table for T5 (° C --K) ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm ° C ° F K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11...
  • Page 45 2.Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value Compressor ASK89D53UEZ ASN98D22UFZ ASM135D23UFZ ATM150D23UFZ Model Blue - Red 1.57Ω 2.35Ω 1.75Ω 0.75Ω Blue - Black (20℃/68℉) (20℃/68℉) (20℃/68℉) (20℃/68℉) Red - Blue...

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