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

Super dc inverter multi type
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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

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Summary of Contents for ROYAL CLIMA 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: Table Of Contents

    CONTENTS 1. General information of Outdoor Units .......... 2 2. Features ..................3 3. Dimensions ..................4 4. Refrigeration Cycle Diagram ............5 5. Wiring diagram ................7 6. Indoor units combination ............11 7. Sound Levels ................13 8. Installation Details ............... 14 8.1 Wrench torque sheet for installation ..................

  • Page 3: General Information Of Outdoor Units

    General information of Outdoor Units Model name Dimension (mm) Compressor 2RFM-14HN/OUT ASN108D22UEZ 800x333x554 2RFM-18HN/OUT ASN140D21UFZ 800x333x554 ASM135D23UFZ 3RFM-21HN/OUT ASM135D23UFZ 845x363x702 3RFM-28HN/OUT ATF235D22UMT 946x410x810 4RFM-36HN/OUT ATF310D43UMT 946x410x810 5RFM-42HN/OUT ATF310D43UMT 946x410x810...

  • Page 4: 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 5: Dimensions

    Dimensions Unit：mm Model 2RFM-14HN/OUT 2RFM-18HN/OUT 3RFM-21HN/OUT 3RFM-28HN/OUT 1034 4RFM-36HN/OUT 1034 5RFM-42HN/OUT 1034...

  • Page 6: Refrigeration Cycle Diagram

    Refrigeration Cycle Diagram Refrigeration circuit drawing of inverter 1 drive 2 type I N D O O R O U T D O O R E X V A C A P I L L A R Y A L I Q U I D V A L V E A C H E C K V A L V E E X V B C A P I L L A R Y B L I Q U I D V A L V E B...
  • Page 7 4.3 Refrigeration circuit drawing of inverter 1 drive 4 type I N D O O R O U T D O O R E X V A C A P I L L A R Y A L IQ U ID V A L V E E X V B C A P I L L A R Y B L IQ U ID V A L V E C H E C K V A L V E...

  • Page 8: Wiring Diagram

    Wiring diagram 2RFM-14HN/OUT, 2RFM-18HN/OUT...
  • Page 9 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 4RFM-28HN/OUT 4RFM-36HN/OUT...
  • Page 11 5RFM-42HN/OUT...

  • Page 12: Indoor Units Combination

    Indoor units combination Indoor unit combination for 2RFM-14HN/OUT One unit Two unit 9+12 7+12 Indoor unit combination for 2RFM-18HN/OUT One unit Two unit 9+12 7+12 9+18 7+18 12+12 Indoor unit combination for 3RFM-21HN/OUT One unit Two unit Three unit 7+7+7...
  • Page 13 One unit Two unit Three unit Four unit 9+18 7+7+7 7+9+18 9+9+12 12+12+12 7+7+7+7 7+7+9+24 7+9+12+12 9+9+12+12 9+24 7+7+9 7+9+24 9+9+18 12+12+18 7+7+7+9 7+7+12+12 7+9+12+18 9+9+12+18 7+12 12+12 7+7+12 7+12+12 9+9+24 12+12+24 7+7+7+12 7+7+12+18 7+9+18+18 9+12+12+12 7+18 12+18 7+7+18 7+12+18 9+12+12 12+18+18 7+7+7+18 7+7+18+18 7+12+12+12 9+12+12+18...

  • Page 14: Sound Levels

    Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) 2RFM-14HN/OUT 2RFM-18HN/OUT 56.5 3RFM-21HN/OUT 57.5 59.5 3RFM-28HN/OUT 4RFM-36HN/OUT 63.5 5RFM-42HN/OUT...

  • Page 15: Installation Details

    Installation Details 8.1 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) 8.2 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 16: Installation For The First Time

    ● 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 17 (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 18 2. Air purging by refrigerant Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the closed position. 2). Connect the charge set and a charging cylinder to the service port of the 3-way valve. 3). Air purging. Open the valves on the charging cylinder and the charge set.
  • Page 19 3. 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 20: Adding The Refrigerant After Running The System For Many Years

    8.5 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 21: Re-Installation While The Indoor Unit Need To Be Repaired

    8.6 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 22 2. Air purging by the refrigerant Procedure: 1). Confirm that both the 2-way and 3-way valves are set to the closed position. 2). Connect the charge set and a charging cylinder to the service port of the 3-way valve Leave the valve on the charging cylinder closed. 3).

  • Page 23: Re-Installation While The Outdoor Unit Need To Be Repaired

    8.7 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 24 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 25: Electronic Control Function

    Electronic control function 9.1 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 9.2 Electric control working environment.
  • Page 26 9.4 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 27 degree.) AD value of current The display value is hex number. 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 28 V O L T A G E N o li m it V O L T _ L T M _ F R E Q 1 _ A D D V O L T _ L T M _ F R E Q 2 _ A D D Note: if the low voltage protection occurs and not resumes within 3min, it will keep the protection always after restart the machine.
  • Page 29 O f f D e c r e a s e H o ld R e s u m e 9.5.7 Outdoor unit anti-freezing protection When T2<4℃ for 250 seconds or T2<0℃, the indoor unit capacity demand will be zero and resume to normal when T2>8℃...

  • Page 30: Troubleshooting

    10. Troubleshooting Indoor unit error code explanation: 10.1 For Console RCI-T26HN(excluding ) Operation Lamp Timer Lamp Malfunction (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 31 For RCI-T60HN DISPLAY MALFUNCTION Timer Alarm DIGITAL TUBE ☆ Open or short circuit of T1 temperature sensor ☆ Open or short circuit of T2 temperature sensor ☆ Indoor / outdoor units communication error ☆ Full-water malfunction ☆ ☆ Indoor EEPROM malfunction ☆...
  • Page 32 models) ☆ Low pressure protection of compressor X(off) ☆(flash at 2Hz) O (on) Outdoor unit error code explanation: 10.2 Display LED STATUS Outdoor EEPROM malfunction Indoor / outdoor units communication error Communication malfunction between IPM board and outdoor main board Open or short circuit of outdoor unit temperature sensor Voltage protection Outdoor fan speed has been out of control...
  • Page 33 Trouble shooting 10.3 10.3.1 For the indoor unit 10.3.1.1 Indoor EEPROM parameter error 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 34 10.3.1.2 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 35 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...
  • Page 36 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 10.3.1.3 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 38 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 39 10.3.1.4 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 40 10.3.2 For the super-slim cassette with up-down panel 10.3.2.1 Communication error between indoor unit and up-down panel F7 Displayed F7 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 between up-down panel and...
  • Page 41 10.3.3 For the outdoor unit 10.3.3.1 Outdoor EEPROM parameter error(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 42 10.3.3.2 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 43 10.3.3.3 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 44 10.3.3.4 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 45 10.3.3.5 High pressure protection (ODU P1)(For 3RFM-28HN, 4RFM-36HN, 5RFM-42HN) 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...
  • Page 46 10.3.3.6 Low pressure protection (ODU P2)(For 3RFM-28HN, 4RFM-36HN, 5RFM-42HN) 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...
  • Page 47 10.3.3.7 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 48 10.3.3.8 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 49 10.3.3.9 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 Correct the connection between temperature...
  • Page 50 10.3.3.10 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 51 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.
  • Page 52 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 53 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 54 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 55 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...

This manual is also suitable for:

2rfm-18hn/out3rfm-21hn/out3rfm-28hn/out4rfm-36hn/out5rfm-42hn/out

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