ROYAL CLIMA 2RFM-14HN/OUT Service Manual Download Page 1

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SERVICE MANUAL

AIRCONDITIONER

SUPER DC INVERTER MULTI TYPE

2RFM-14HN/OUT

2RFM-18HN/OUT

RFM-21HN/OUT

RFM-28HN/OUT

4RFM-36HN/OUT

5RFM-42HN/OUT

DC MULTI OUTDOOR UNITS

Summary of Contents for 2RFM-14HN/OUT

Page 1: ...SERVICE MANUAL AIRCONDITIONER SUPER DC INVERTER MULTI TYPE 2RFM 14HN OUT 2RFM 18HN OUT 3RFM 21HN OUT 3RFM 28HN OUT 4RFM 36HN OUT 5RFM 42HN OUT DC MULTI OUTDOOR UNITS ...

Page 2: ... 8 1 Wrench torque sheet for installation 14 8 2 Connecting the cables 14 8 3 Pipe length and the elevation 14 8 4 Installation for the first time 15 8 5 Adding the refrigerant after running the system for many years 19 8 6 Re installation while the indoor unit need to be repaired 20 8 7 Re installation while the outdoor unit need to be repaired 22 9 Electronic control function 24 10 Troubleshooti...

Page 3: ...n mm Compressor 2RFM 14HN OUT 800x333x554 ASN108D22UEZ 2RFM 18HN OUT 800x333x554 ASN140D21UFZ ASM135D23UFZ 3RFM 21HN OUT 845x363x702 ASM135D23UFZ 3RFM 28HN OUT 946x410x810 ATF235D22UMT 4RFM 36HN OUT 946x410x810 ATF310D43UMT 5RFM 42HN OUT 946x410x810 ATF310D43UMT ...

Page 4: ...e 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 Anti rust cabinet Valve protection cover Low noise air flow system Discharge pipe temperature protection ...

Page 5: ...A B 800 333 554 860 514 340 800 333 554 860 514 340 845 363 702 923 540 350 946 410 810 1034 673 403 946 410 810 1034 673 403 946 410 810 1034 673 403 A B D 2RFM 14HN OUT 2RFM 18HN OUT 3RFM 21HN OUT 3RFM 28HN OUT 4RFM 36HN OUT 5RFM 42HN OUT ...

Page 6: ... c u m u la to r T 2 B A E v a p o ra to r te m p s e n s o r o u tle t T 2 B B 4 2 Refrigeration circuit drawing of inverter 1 drive 3 type L IQ U ID V A L V E A G A S V A L V E A H E A T E X C H A N G E E V A P O R A T O R H E A T E X C H A N G E C O N D E N S E R C o m p re s s o r 4 W A Y V A L V E C O O L IN G H E A T IN G T 2 E v a p o ra to r te m p s e n s o r m id d le T 1 R o o m te m p ...

Page 7: ...p o ra to r te m p s e n s o r o u tle t T 2 B B T 2 B C T 2 B D 4 4 Refrigeration circuit drawing of inverter 1 drive 5 type L IQ U ID V A L V E A G A S V A L V E A H E A T E X C H A N G E E V A P O R A T O R H E A T E X C H A N G E C O N D E N S E R C O O L IN G H E A T IN G T 2 E v a p o ra to r te m p s e n s o r m id d le T 1 R o o m te m p s e n s o r T 3 C o n d e n s e r te m p s e n s o r...

Page 8: ...7 5 Wiring diagram 2RFM 14HN OUT 2RFM 18HN OUT ...

Page 9: ...8 Note S 1 S 2 are used in other type of models They don t need to be connected in multi models 3RFM 21HN OUT ...

Page 10: ...9 4RFM 28HN OUT 4RFM 36HN OUT ...

Page 11: ...10 5RFM 42HN OUT ...

Page 12: ...12 9 7 9 9 12 7 7 9 9 9 9 12 7 12 9 18 7 7 12 9 9 12 18 7 18 12 12 7 9 9 7 12 12 6 4 Indoor unit combination for 4RFM 28HN OUT 6 5 Indoor unit combination for 4RFM 36HN OUT One unit Two unit Three unit Four unit 7 7 7 9 9 12 18 7 7 7 7 9 9 7 12 18 9 12 18 7 7 7 7 7 7 9 9 7 9 9 12 9 7 9 9 12 12 24 7 7 9 7 9 12 9 9 9 12 12 12 7 7 7 9 7 7 9 12 7 9 12 12 12 7 12 9 18 18 18 7 7 12 7 9 18 9 9 12 12 12 1...

Page 13: ...2 9 9 9 12 12 7 7 7 7 9 7 7 7 9 24 7 7 9 12 18 7 9 9 12 18 9 9 9 12 18 7 7 7 7 12 7 7 7 12 18 7 7 12 12 12 7 9 12 12 12 9 9 12 12 12 7 7 7 7 18 7 7 7 18 18 7 7 12 12 18 7 9 12 12 18 9 12 12 12 12 7 7 7 7 24 7 7 9 9 9 7 9 9 9 9 9 9 9 9 9 9 12 12 12 18 7 7 7 9 9 7 7 9 9 12 7 9 9 9 12 9 9 9 9 12 12 12 12 12 12 7 7 7 9 12 7 7 9 9 18 7 9 9 9 18 9 9 9 9 18 One unit Two unit Three unit Four unit 7 7 7 9 ...

Page 14: ...eight of outdoor unit Model Noise Power dB A Noise level dB A 60 54 64 54 65 56 5 65 57 5 68 59 5 66 60 68 63 5 68 62 H 1 0m Outdoor Unit Microphone 2RFM 14HN OUT 2RFM 18HN OUT 3RFM 21HN OUT 3RFM 28HN OUT 4RFM 36HN OUT 5RFM 42HN OUT ...

Page 15: ...on 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 drive 4 1 drive 5 Max length for all rooms m 40 60 80 80 Max length for one IU m 25 30 35 35 Max height difference between IU and OU m 15 15 15 15 Max height difference between IUs m 10 10 10 10 Ad...

Page 16: ...e 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 refrigerant circuit may freeze and block capillary tubing Water may lead to corrosion of parts in the refrigerant system Therefore the indoor units and the pipes between indoor and outdoor units must be le...

Page 17: ...please 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 minutes after turning off the vacuum pump 7 Turn the flare nut of the 3 way valves about 45 counterclockwise for 6 or 7seconds after the gas coming out then tighten the flare nut again Make sure the...

Page 18: ...nch 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 the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way and 3 way...

Page 19: ...charge 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 valves Low side on the charge set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the table disconnect the charge hose from the 3 way va...

Page 20: ... 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 set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the gauge and the pressure of the low side disconnect the charge hose from the 3 way...

Page 21: ...ervice 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 the close position 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immediately Do this quickly so that the g...

Page 22: ...g 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 cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder a...

Page 23: ... 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 turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump ...

Page 24: ...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 can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the...

Page 25: ...y 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 displays 0 5s In compressor pre heating The LED displays PH or alternative displays between running frequency and PH each displays 0 5s During the oil return process The LED displays RO or alternati...

Page 26: ...re 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 connected the digital display tube will show 18 B indoor unit evaporator outlet temperature T2BB 19 C indoor unit evaporator outlet temperature T2BC 20 D indoor unit evaporator outlet temperature T2BD 21 E indoor unit evaporator ...

Page 27: ...t 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 caused by T3 Bit2 Frequency limit caused by T5 Bit1 Frequency limit caused by current Bit0 Frequency limit caused by voltage 43 Average value of T2 Sum T2 value of all indoor units number of indoor units in good connection cooling T2B heating T2 ...

Page 28: ...interval of current limit is same as range of T4 limited frequency Cooling mode T 4 C o o lZ o n e 5 C o o lZ o n e 4 C o o lZ o n e 3 C o o lZ o n e 2 C o o lZ o n e 1 Heating mode T 4 H e a tZ o n e 4 H e a tZ o n e 3 H e a tZ o n e 2 H e a tZ o n e 1 9 5 5 Indoor outdoor units communication protection If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes th...

Page 29: ...uency 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 frequency during the oil return the AC quit oil return 9 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 ...

Page 30: ... short circuit of T2B temperature sensor For free match indoor units O 7 IPM module malfunction 1 Over voltage or over low voltage protection 2 Too low ambient temperature protection 4 Inverter compressor drive protection 5 Mode conflict 6 Low pressure protection of compressor 7 O on X off flash at 2Hz For RCI T30HN Malfunction Running lamp Timer lamp Defrosting lamp Open or short circuit of T1 te...

Page 31: ...2 Indoor fan speed has been out of control E3 X 4 Open or short circuit of T1 temperature sensor E4 X 5 Open or short circuit of T2 temperature sensor E5 X 6 Water level alarm EE X 8 Overcurrent protection For some units F0 O 1 Open or short circuit of T4 temperature sensor F1 O 2 Open or short circuit of T3 temperature sensor F2 O 3 Open or short circuit of T5 temperature sensor F3 O 4 Outdoor EE...

Page 32: ...nnector of sensor is defective F3 No C Indoor unit coil outlet temperature sensor or connector of sensor is defective F4 No D Indoor unit coil outlet temperature sensor or connector of sensor is defective F5 No E Indoor unit coil outlet temperature sensor or connector of sensor is defective P1 High pressure protection ForM4OE 28HFN1 Q M4OB 36HFN1 Q M5OE 42HFN1 Q P2 Low pressure protection ForM4OE ...

Page 33: ...t 10 3 1 1 Indoor EEPROM parameter error Yes Replace the indoor main PCB Power off then restart the unit 2 minutes later EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 34: ...y remote controller Is all indoor unit display Turn off the all indoor units Is IPM power LED or operating LED lamp On Refer PIC2 Yes A Is all the wiring between terminal and Indoor PCB connect ok No Yes A No Reconnect the wiring Is indoor units number correct Check on the outdoor check point 2 for dual zone 3 for tri zone 4 for qua zone 5 for qui zone Refer PIC 4 Yes No first time Yes Yes Replace...

Page 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 negative value ...

Page 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 ...

Page 37: ...heck the wiring of fan motor Are all the connections good No Yes No Correct the connections Correct the connections No Replace the fan motor Replace the fan motor Yes Yes Replace the main PCB Replace the main PCB No Check whether the main PCB is normal through index 1 Check whether the main PCB is normal through index 1 Yes No Index 1 1 Indoor AC fan motor Power on and set the unit running in fan ...

Page 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 GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6 5V 6 Blue FG 13 5 16 5V ...

Page 39: ...normal Yes 10 3 1 5 Full water malfunction If the water level switch is inserted well If the water level switch is inserted well No Insert the water level switch well Insert the water level switch well If the water level switch is broken If the water level switch is broken Yes Replace the water level switch Replace the water level switch Replace the water pump If malfunction is still not solved Re...

Page 40: ...layed F8 Displayed Up down panel is defective Up down panel is defective Retry Can the panel move up and down normally Retry Can the panel move up and down normally Check the wiring of left and right sensors Are they correctly wired 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 The main control PCB of up dow...

Page 41: ...Replace the outdoor main PCB Replace the outdoor main PCB Power off then restart the unit 2 minutes later Power off then restart the unit 2 minutes later EEPROM An electrically erasable programmable read only memory whose contents can be erased and reprogrammed using a pulsed voltage ...

Page 42: ... IPM board light Check the signal wire between the IPM board and the main board is it connected good Reconnect and retry Is error still display Replace IPM board and then check whether the system can run normally Replace the electric control box No No No No Yes Trouble is solved No Yes Replace outdoor main board and then check whether the system can run normally No Yes Yes E3 display ...

Page 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 can run normally Replace IPM board and then check whether the system can run normally Replace outdoor main board Yes No No No No Yes Trouble is solved Yes Yes ...

Page 44: ... the fan are tighten Check the wiring of fan motor Are all the connections good Check the wiring of fan motor Are all the connections good No Yes No Correct the connections Correct the connections No Replace the fan motor Replace the fan motor Yes Yes Replace the main PCB Replace the main PCB No Check whether the main PCB is normal through index 1 Check whether the main PCB is normal through index...

Page 45: ...or ambient temperature is higher than 50 Check whether the outdoor ambient temperature is higher than 50 No Stop the unit Stop the unit Yes Check if the outdoor unit ventilation is good Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilate well Make the outdoor unit ventilate well Check whether the heat exchanger is dirty Check whether the heat exchanger is dirty No Cle...

Page 46: ...ressure protector is broken Whether the low pressure protector is broken Check whether the outdoor ambient temperature is too low Check whether the outdoor ambient temperature is too low No Stop the unit Stop the unit Yes Open fully valve core of high pressure valve Open fully valve core of high pressure valve No Check whether valve core of high pressure valve is opened Check whether valve core of...

Page 47: ...t temperature is higher than 50 No Stop the unit Yes Judge 3 Check whether the outdoor unit is bad ventilation No Make the outdoor unit ventilate well Yes Judge 5 The refrigerant pipe is blocked No Let the refrigerant out then use the high pressure nitrogen or refrigerant to blow pipe vacuumize and charge the refrigerant again Yes Judge 4 Check whether the heat exchanger is dirty No Clean the heat...

Page 48: ...iring diagrams Measure the resistance value of compressor discharge temp sensor If the value is not normal is normal refer to the Appendix 2 Measure the resistance value of compressor discharge temp sensor If the value is not normal is normal refer to the Appendix 2 No Yes Yes No Correct the wiring connection Correct the wiring connection Stop leaking and add refrigerant Stop leaking and add refri...

Page 49: ...tdoor unit ventilation is good Check if the outdoor unit ventilation is good Yes Make the outdoor unit ventilate well Make the outdoor unit ventilate well Check whether the heat exchanger is dirty Check whether the heat exchanger is dirty No Clean the heat exchanger Clean the heat exchanger Yes Check whether the refrigerant system is ok Check whether the refrigerant system is ok Replace outdoor ma...

Page 50: ...e main board check whether the system can work normally No Replace the compressor check whether the system can work 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 Use the multimeter to measure the resistance between each two terminals check whether ...

Page 51: ...stance 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 ...

Page 52: ... 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 3269 41 4 96392 81 1 13604 121 0 35042 2 31 5635 42 4 76253 82 1 09958 122 0 3413 3 29 9058 43 4 57050 83 1 06448 123 0 33246 4 28 3459 44 4 38736 84 1 03069 124 0 32390 5 26 8778 45 4 21263 85 0 99...

Page 53: ...89 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 6 859 120 2 117 1 171 9 41 28 81 6 641 121 2 061 2 163 3 42 26 9 82 6 43 122 2 007 3 155 2 43 25 86 83 6 228 123 1 955 4 147 6 44 24 85 84 6 033 124 1 905 5 140 4 45 23 89 85 5 844 125 1 856 6 133 5...

Page 54: ...Compressor checking Measure the resistance value of each winding by using the tester Position Resistance Value ASN108D22UEZ ASM135D23UFZ ATF235D22UMT ATF310D43UMT Blue Red 1 57Ω 20 1 75Ω 20 0 75Ω 20 0 65Ω 20 ...

Page 55: ...nce between P and UVWN UVW and N Digital tester Normal resistance value Digital tester Normal resistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W Red 4 Indoor AC Fan Motor Measure the resistance value of each winding by using the tester Position Resistance Value YKSS 68 4 15 1 Weilng Black Red 285 8Ω 8 20 Red Yellow 178 5Ω 8 20 Yellow Blue 178 5Ω 8 20 ...

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ROYAL CLIMA 2RFM-14HN/OUT, Service Manual

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