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Carrier 38QHC009D8S Series, Service Manual

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Carrier 38QHC009D8S Series Service Manual Download Page 52

 

50 

 

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. 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Summary of Contents for 38QHC009D8S Series

Page 1: ...QHC R32 Inverter Series Service Manual R32...

Page 2: ...time 16 6 5 Adding the refrigerant after running the system for many years 17 6 6 Re installation while the indoor unit need to be repaired 17 6 7 Re installation while the outdoor unit need to be re...

Page 3: ...r electric shock Do not modify or extend the power cable There is risk of fire or electric shock Do not install remove or reinstall the unit by yourself customer There is risk of fire electric shock e...

Page 4: ...d step on or fall onto the outdoor unit This could result in personal injury and product damage CAUTION Always check for gas refrigerant leakage after installation or repair of product Low refrigerant...

Page 5: ...ned off Ensure that the conditions within the area have been made safe by control of flammable material 4 Checking for presence of refrigerant The area shall be checked with an appropriate refrigerant...

Page 6: ...include that capacitors are discharged this shall be done in a safe manner to avoid possibility of sparking that there no live electrical components and wiring are exposed while charging recovering o...

Page 7: ...hall be recovered from the system or isolated by means of shut off valves in a part of the system remote from the leak Oxygen free nitrogen OFN shall then be purged through the system both before and...

Page 8: ...ll cylinders No more than 80 volume liquid charge i Do not exceed the maximum working pressure of the cylinder even temporarily j When the cylinders have been filled correctly and the process complete...

Page 9: ...e Transfer Note arranged Do not mix refrigerants in recovery units and especially not in cylinders If compressors or compressor oils are to be removed ensure that they have been evacuated to an accept...

Page 10: ...42QHC024D8S 38QHC024D8S Cold catalyst filter Silver Ico Filter O Vitamin C Filter O 3M HAM Filter O Bio Filter O Golden Fin O Super Ionizer O Compressor Crankcase Heater O Self cleaning O Louver Posi...

Page 11: ...9 4 Dimension 4 1 Indoor Unit Model W D H 42QHC009 730 192 291 42QHC012 812 192 300 42QHC018 973 218 319 42QHC024 1082 225 338...

Page 12: ...10 For 42QHC009D8S For 42QHC012D8S For 42QHC018D8S...

Page 13: ...11 For 42QHC024D8S...

Page 14: ...tdoor Unit Outdoor Unit Dimension mm Mounting Dimension mm Outdoor Unit W H D A B 38QHC009D8S 700 550 275 460 276 38QHC012D8S 770 555 300 487 298 38QHC018D8S 800 554 333 514 340 38QHC024D8S 845 702 36...

Page 15: ...IQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER Compressor 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2 Evaporator temp sensor T1 Room temp sensor T3 Condenser temp sens...

Page 16: ...4 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 section...

Page 17: ...38QHC018D8S 1 2 12 7 1 4 6 35 5 20 30 12 42QHC024D8S 38QHC024D8S 5 8 15 9 3 8 9 52 5 25 50 24 Caution For the R290 or R32 refrigerant model make sure the conditions within the area have been made saf...

Page 18: ...hose of handle hi connection to the vacuum pump 4 Fully open the handle Lo of the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacuation for 30 minutes and check whether the compound m...

Page 19: ...der bottom up to ensure liquid charge 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the l...

Page 20: ...whether the compound meter indicates 0 1Mpa If the meter does not indicate 0 1Mpa after pumping 30 minutes it should be pumped 20 minutes more If the pressure can t achieve 0 1Mpa after pumping 50 min...

Page 21: ...tronic scale and record the weight 4 Open the valves Low side on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or...

Page 22: ...itioner is used beyond the above conditions certain safety protection features may come into operation and cause the unit to operate abnormally 2 The room relative humidity should be less than 80 If t...

Page 23: ...21 8 Wiring Diagram 8 1 Indoor Unit 42QHC009D8S 42QHC012D8S 42QHC018D8S 42QHC024D8S...

Page 24: ...22 8 2 Outdoor Unit 38QHC009D8S 38QHC012D8S...

Page 25: ...23 38QHC018D8S 38QHC024D8S...

Page 26: ...is operational Displays the room temperature in FAN mode Displays the self diagnostic codes Dispalys for three seconds when Timer ON Fresh Swing Turbo or Silence feature is activated Dispalys for thr...

Page 27: ...code will display on indoor unit and the unit will stop working 9 3 6 Indoor fan delayed open function When the unit starts up the louver will be active immediately and the indoor fan will open 7s la...

Page 28: ...rammed parameter of temperature compensation When the AC run in mute mode the compressor will run with low frequency When the current is more than setting value the current protection function will be...

Page 29: ...more than setting value the compressor will stop 9 4 2 5 Evaporator temperature protection When Evaporator temperature temp is less than setting value the compressor will stop 9 4 3 Heating Mode 9 4 3...

Page 30: ...cold air function will start and indoor fan motor will run at low speed the speed can t be changed when the temp is lower than setting value the indoor fan motor will stop When the indoor temp reache...

Page 31: ...ll stop defrost lamp of the indoor unit will be lighted Will be displayed 9 4 3 5 Evaporator coil temperature protection T2 Resume Off Decrease Hold When evaporator temperature temp is more than the s...

Page 32: ...setting temperature Forced auto mode The action of forced auto mode is the same as normal auto mode with 24 setting temperature When AC receives signals such as switch on switch off timer on timer off...

Page 33: ...door PCB receives the signal which results from pressing the FOLLOW ME button on remote controller the buzzer will emit a sound and this indicates the follow me function is initiated But when the indo...

Page 34: ...32 faint breeze which will reduce the noise to the lowest level and create a quiet and comfortable room for you...

Page 35: ...splay the code name in 2 seconds the details are as follows Enquiry information Displaying code Meaning T1 T1 T1 temp T2 T2 T2 temp T3 T3 T3 temp T4 T4 T4 temp T2B Tb T2B temp TP TP TP temp TH TH TH t...

Page 36: ...01 109 b0 b1 b9 110 111 119 c0 c1 c9 120 121 129 d0 d1 d9 130 131 139 E0 E1 E9 140 141 149 F0 F1 F9 150 151 159 Indoor fan speed Outdoor fan speed 0 OFF 1 2 3 4 Low speed Medium speed High speed Turbo...

Page 37: ...electricity power in capacitor Electrolytic Capacitors HIGH VOLTAGE CAUTION For other models please connect discharge resistance approx 100 40W or soldering iron plug between terminals of the electro...

Page 38: ...on 1 times O F0 Overload current protection 2 times O F1 Outdoor ambient temperature sensor T4 open circuit or short circuit 3 times O F2 Condenser coil temperature sensor T3 open circuit or short cir...

Page 39: ...Installation mistake PCB faulty Trouble shooting Yes Replace the indoor outdoor main PCB Power off then restart the unit 2 minutes later EEPROM a read only memory whose contents can be erased and repr...

Page 40: ...ack pan N If the voltage has always been the positive value Power off then restart the unit 2 minutes later Power off then restart the unit 2 minutes later If the voltage is a fixed value Replace the...

Page 41: ...ark Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit The red pin of multimeter connects with 2 port while the black pin is for 3 port When AC is normal running the vol...

Page 42: ...pposed causes Wiring mistake Fan ass y faulty Fan motor faulty PCB faulty Trouble shooting Power off then restart the unit 2 minutes later Shut off the power supply Rotate the fan by hand The unit ope...

Page 43: ...ontrol chip is in outdoor PCB Power on and check if the fan can run normally if the fan can run normally the PCB must has problems and need to be replaced If the fan can t run normally measure the res...

Page 44: ...us 4 seconds and this situation happens 3 times the display area will show EC and AC will turn off Supposed causes T2 sensor faulty Indoor PCB faulty System problems such as leakage or blocking Troubl...

Page 45: ...f the sampling voltage is lower than 0 06V or higher than 4 94V the LED will display the failure Supposed causes Wiring mistake Sensor faulty PCB faulty Trouble shooting Check the connection between t...

Page 46: ...Power supply problems System blockage PCB faulty Wiring mistake Compressor malfunction Check the power supply Check the connections and wires Stop the unit No Yes No Correct the connections or replac...

Page 47: ...on Outdoor fan ass y faulty Compressor malfunction Outdoor PCB faulty Trouble shooting Check the wiring between main PCB and compressor Correct the connection or replace the wires and connectors Yes N...

Page 48: ...ytic 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 resis...

Page 49: ...Check the power supply Check the connections and wires Stop the unit No Yes No Correct the connections or replace the wires Yes Replace the reactor Yes No Replace the IPM board Power on and when the...

Page 50: ...higher than limited value the LED will display the failure Supposed causes IPM radiator problem PCB faulty Trouble shooting Yes Tighten the screws and apply silicon grease Tighten the screws and appl...

Page 51: ...g mistake IPM malfunction Outdoor fan ass y faulty Compressor malfunction Outdoor PCB faulty Trouble shooting Check the wiring between main PCB and compressor Correct the connection or replace the wir...

Page 52: ...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 t...

Page 53: ...29078 117 243 0 38991 2 28 310 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982...

Page 54: ...2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246...

Page 55: ...pressor checking Measure the resistance value of each winding by using the tester Position Resistance Value KSN98D22UFZ KSM135D23UFZ KTF235D22UMT Blue Red 1 57 20 68 1 72 20 68 0 75 20 68 Blue Black R...

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