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10.4 Main parts check

1. Temperature sensor checking

Disconnect the temperature sensor from PCB, measure the resistance value with a tester.

Temperature Sensors.

Room temperature(T1) sensor,

Indoor coil temperature(T2) sensor,

Outdoor coil temperature(T3) sensor,

Outdoor ambient temperature(T4) sensor,

Compressor discharge temperature(T5) sensor.

Measure the resistance value of each winding by using the multi-meter.

Содержание YU2E14YEEBMHO-X

Страница 1: ...anual Issue Date Nov 27 2019 Multi Inverter Outdoor Form MMULIT50 191127 Multi Inverter R 410A 50Hz Heat Pump YU2E14YEEBMHO X YU2E18YEEBMHO X YU3E21YEEBMHO X YU3E27YEEBMHO X YU4E28YEEBMHO X YU4E36YEEB...

Страница 2: ...on of Outdoor Units 2 2 Features 3 3 Dimensions 4 4 Refrigeration Cycle Diagram 5 5 Wiring diagram 7 6 Indoor units combination 12 7 Sound Levels 14 8 Installation Details 15 9 Electronic control func...

Страница 3: ...4YEEBMHO X 800x333x554 KSN140D21UFZ YU2E18YEEBMHO X 800x333x554 ASM135D23UFZ YU3E21YEEBMHO X 845x363x702 ASM135D23UFZ YU3E27YEEBMHO X 845x363x702 ATF235D22UMT YU4E28YEEBMHO X 946x410x810 ATF235D22UMT...

Страница 4: ...valves and prevents water from dripping 4 way valve control It is only operated in the heating operation mode except defrosting operation Outdoor unit Power relay control Hydrophilic aluminum fin Ant...

Страница 5: ...554 860 514 340 YU2E18YEEBMHO X 800 333 554 860 514 340 YU3E21YEEBMHO X 845 363 702 923 540 350 YU3E27YEEBMHO X 845 363 702 923 540 350 YU4E28YEEBMHO X 946 410 810 1034 673 403 YU4E36YEEBMHO X 946 41...

Страница 6: ...XV B CAPILLARY B LIQUID VALVE B GAS VALVE B Accumulator T2B A Evaporator temp sensor outlet T2B B 4 2 Refrigeration circuit drawing of inverter 1 drive 3 type LIQUID VALVE A GAS VALVE A HEAT EXCHANGE...

Страница 7: ...h Low pressure switch T2B A Evaporator temp sensor outlet T2B B T2B C T2B D 4 4 Refrigeration circuit drawing of inverter 1 drive 5 type LIQUID VALVE A GAS VALVE A HEAT EXCHANGE EVAPORATOR HEAT EXCHAN...

Страница 8: ...7 5 Wiring diagram YU2E14YEEBMHO X YU2E18YEEBMHO X...

Страница 9: ...8 Note S 1 S 2 are used in other type of models They don t need to be connected in multi models YU3E21YEEBMHO X YU3E27YEEBMHO X...

Страница 10: ...9...

Страница 11: ...10 YU4E28YEEBMHO X YU4E36YEEBMHO X...

Страница 12: ...11 YU5E42YEEBMHO X...

Страница 13: ...9 12 7 12 9 18 7 7 12 18 7 18 12 12 6 4 Indoor unit combination for YU3E27YEEBMHO X One unit Two unit Three unit 7 7 7 7 18 9 18 7 7 7 7 9 12 9 12 12 9 7 9 9 9 12 12 7 7 9 7 12 12 12 12 12 12 7 12 9 1...

Страница 14: ...7 18 18 7 9 12 24 9 9 9 24 12 12 12 18 7 7 9 12 7 9 9 9 7 9 18 18 9 9 12 12 Five Unit 7 7 7 7 7 7 7 7 9 18 7 7 9 12 12 7 9 9 9 18 9 9 9 12 12 7 7 7 7 9 7 7 7 12 12 7 7 9 12 18 7 9 9 12 12 9 9 12 12 1...

Страница 15: ...door unit Model Noise Power dB A Noise level dB A YU2E14YEEBMHO X 64 54 YU2E18YEEBMHO X 65 56 5 YU3E21YEEBMHO X 65 57 5 YU3E27YEEBMHO X 68 59 5 YU4E28YEEBMHO X 66 60 YU4E36YEEBMHO X 68 63 5 YU5E42YEEB...

Страница 16: ...the side panel of the unit Please refer to the nameplate before selecting the cable fuse and switch 8 3 Pipe length and the elevation Maximum piping length and height difference 1 drive 2 1 drive 3 1...

Страница 17: ...first time Air and moisture in the refrigerant system have undesirable effects as below Pressure in the system rises Operating current rises Cooling or heating efficiency drops Moisture in the refrig...

Страница 18: ...lease check if there are some leakage points Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump Confirm that the gauge needle does not move approximately 5...

Страница 19: ...ch to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge th...

Страница 20: ...harge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the...

Страница 21: ...careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge...

Страница 22: ...rvice port 3 Air purging of the charge hose Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to t...

Страница 23: ...the air use a torque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging...

Страница 24: ...position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1Mpa 4 Close the valve Low side on the charge set t...

Страница 25: ...ow 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 can be charged with a little at a time approximately...

Страница 26: ...function In standby the LED displays In compressor operation the LED display the running frequency In defrosting mode The LED displays dF or alternative displays between running frequency and dF each...

Страница 27: ...perature T2BA If the temperature is lower than 9 degree the digital display tube will show 9 If the temperature is higher than 70 degree the digital display tube will show 70 If the indoor unit is not...

Страница 28: ...Bit5 1 Bit3 1 Bit1 1 It means frequency limit caused by T4 T3 and current Bit6 Frequency limit caused by PFC Bit5 Frequency limit caused by T4 Bit4 Frequency limit caused by T2 Bit3 Frequency limit ca...

Страница 29: ...n Temperature interval of current limit is same as range of T4 limited frequency Cooling mode T4 CoolZone5 CoolZone4 CoolZone3 CoolZone2 CoolZone1 Heating mode T4 HeatZone4 HeatZone3 HeatZone2 HeatZon...

Страница 30: ...g frequency for setting time and then resume to former frequency 2 The EXV will keep 300p while the indoor units will keep the current running mode If the outdoor ambient is higher than setting freque...

Страница 31: ...or For free match indoor units F6 O 7 Communication error between auto lifting panel and slim cassette For slim cassette with auto lifting panel F7 O 8 Auto lifting panel is faulty For slim cassette w...

Страница 32: ...E Indoor unit coil outlet temperature sensor or connector of sensor is defective P1 High pressure protection ForYU4E28YEEBMHO X YU4E36YEEBMHO X YU5E42YEEBMHO X P2 Low pressure protection ForYU4E28YEE...

Страница 33: ...uble shooting 10 3 1 For the indoor unit 10 3 1 1 Indoor EEPROM parameter error EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a puls...

Страница 34: ...33 10 3 1 2 Indoor outdoor units communication error...

Страница 35: ...2 IPM or outdoor main PCB Self Check Power Operating Self Check Operating Pic 2 IPM or outdoor main PCB Pic 1 check the voltage of N to S Vs is it moving alternately between positive value and negativ...

Страница 36: ...35 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...

Страница 37: ...of the voltage is less than 100V 208 240V power supply or 50V 115V power supply the PCB must have problems and need to be replaced 2 Indoor DC fan motor control chip is inside fan motor Power on and w...

Страница 38: ...type NO Color Signal Voltage 1 Red Vs Vm 280V 380V 2 3 Black GND 0V 4 White Vcc 14 17 5V 5 Yellow Vsp 0 5 6V 6 Blue FG 14 17 5V For other types NO Color Signal Voltage 1 Red Vs Vm 192V 380V 2 3 Black...

Страница 39: ...38 10 3 1 4 Open or short circuit of temperature sensor 10 3 1 5 Full water malfunction...

Страница 40: ...nel move up and down normally Check the wiring of left and right sensors Are they correctly wired Yes No The main control PCB of up down panel is defective Replace it Yes No If panel can move power of...

Страница 41: ...0 3 3 For the outdoor unit 10 3 3 1 Outdoor EEPROM parameter error ODU E0 EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed vol...

Страница 42: ...41 10 3 3 2 Communication malfunction between IPM board and outdoor main board ODU E3...

Страница 43: ...240VAC Check the power supply Check whether the voltage of IPM board P and N is normal DC277 356V for 18 27KBtu h DC277 410V for 36 42KBtu h Replace bridge rectifiers and then check whether the system...

Страница 44: ...low table the PCB must have problems and need to be replaced DC motor voltage input and output NO Color Signal Voltage 1 Red Vs Vm 140V 380V 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V...

Страница 45: ...44 10 3 3 5 High pressure protection ODU P1 ForYU4E28YEEBMHO X YU4E36YEEBMHO X YU5E42YEEBMHO X...

Страница 46: ...l Replace outdoor main board No Replace low pressure protector No Whether the low pressure protector is broken Check whether the outdoor ambient temperature is too low No Stop the unit Yes Open fully...

Страница 47: ...46 10 3 3 7 Current protection of compressor ODU P3...

Страница 48: ...47 10 3 3 8 Temperature protection of compressor discharge ODU P4...

Страница 49: ...Check whether the outdoor ambient temperature is higher than 50 No Stop the unit Yes Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilate well Check whether the heat excha...

Страница 50: ...rk normally Check whether the lines in E part box are connected tightly Yes Connect it tightly check ok or not No No Yes No Replace the bridge rectifiers Check whether the bridge rectifiers are normal...

Страница 51: ...y EXV Wire and piping connected in reverse Check of EXV please refer to part 6 in 10 4 Trouble Criterion Of Main Parts Automatic correction of wiring piping error Press the check switch on the outdoor...

Страница 52: ...e the resistance value with a tester Temperature Sensors Room temperature T1 sensor Indoor coil temperature T2 sensor Outdoor coil temperature T3 sensor Outdoor ambient temperature T4 sensor Compresso...

Страница 53: ...1 34105 116 0 40060 3 41 5878 37 5 87359 77 1 29078 117 0 38991 2 39 8239 38 5 62961 78 1 25423 118 0 37956 1 37 1988 39 5 39689 79 1 21330 119 0 36954 0 35 2024 40 5 17519 80 1 17393 120 0 35982 1 33...

Страница 54: ...9 5 234 9 35 35 78 75 8 084 115 2 422 4 222 8 36 34 32 76 7 82 116 2 357 3 211 4 37 32 94 77 7 566 117 2 294 2 200 7 38 31 62 78 7 321 118 2 233 1 190 5 39 30 36 79 7 086 119 2 174 0 180 9 40 29 15 80...

Страница 55: ...Compressor checking Measure the resistance value of each winding by using the tester Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue Red 1 57 20 1 75 20 0 75 20 0 6...

Страница 56: ...ance between P and UVWN UVW and N Digital tester Normal resistance value Digital tester Normal resistance value Red Black Several M Red Black Several M P N U N U V V W W Red 4 Indoor AC Fan Motor Meas...

Страница 57: ...nit operates in cooling it is 0V When the unit operates in heating it is about 230VAC If the value of the voltage is not in the range the PCB must have problems and need to be replaced 2 Turn off the...

Страница 58: ...57 6 EXV check Disconnect the connectors Resistance to EXV coil Color of lead wire Normal Value Red Blue About 50 Red Yellow Brown Orange 6 5 4 3 2 1 Red Brown Blue Orange Yellow White...

Страница 59: ...2019 Johnson Controls Inc www johnsoncontrols com Johnson Controls reserve the right to change product features without prior notice Form MMULTI50 191127...

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