Инструкция на Мульти сплит-системы Royal Clima серии MULTI FLEXI EU ERP Inverter бренда Royal Clima

SERVICE MANUAL

ROYAL CLIMA MULTI FLEXI EU ERP R32 2022

1. General information of Outdoor Units

2. 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…

3. Dimensions

4. Refrigeration Cycle Diagram

4.1 Refrigeration circuit drawing of inverter 1 drive 2 type M2OC-18HFN8-Q, M2OG-14HFN8-Q, M2OD-18HFN8-Q INDOOR OUTDOOR EXV A CAPILLARY A LIQUID VALVE A LIQUID VALVE B HEAT EXCHANGE (EVAPORATOR) EXV B CAPILLARY B T3 Condenser temp. sensor HEAT EXCHANGE (CONDENSER) T4 Ambient temp. sensor T1 Room…

4.2 Refrigeration circuit drawing of inverter 1 drive 3 type

INDOOR OUTDOOR EXV A LIQUID VALVE A LIQUID VALVE B LIQUID VALVE C HEAT EXCHANGE (EVAPORATOR) EXV B CAPILLARY TUBE T3 Condenser temp. sensor EXV C T4 Ambient temp. sensor T1 Room temp. sensor HEAT EXCHANGE (CONDENSER) T2B-A Evaporator GAS VALVE A T2 Evaporator temp. sensor middle GAS VALVE B GAS…

4.4 Refrigeration circuit drawing of inverter 1 drive 5 type

INDOOR OUTDOOR EXV A LIQUID VALVE A EXV B LIQUID VALVE B LIQUID VALVE C LIQUID VALVE D LIQUID VALVE E HEAT EXCHANGE (EVAPORATOR) EXV C CAPILLARY TUBE T3 Condenser temp. sensor EXV D EXV E T1 Room temp. sensor T4 Ambient temp. sensor T2B-A Evaporator T2 Evaporator temp. sensor middle GAS VALVE A…

5. Wiring diagram

Note: S(1)&S(2) are used in other type of models. They don't need to be connected in multi models

3RMN-21HN/OUT

4RMX-28HN/OUT

4RMX-36HN/OUT

OPTIONAL Applicable to the units AC motor on! TP NDOOR PIPE OLT ТЕМРА oo DRIVER BOARD 16022300000894 OPTIONAL "7 НЕАТ_У р \ В т BLACK р | Hes) р 1 р АЕ fen] ONG MAIN BOARD 'p [cuis} YELLOW L CODE PART NAME CODE PART NAME come COMPRESSOR Й PFC INDUCTOR САР1 FAN MOTOR CAPACITOR ЫРВО _| LOW PRESSURE…

5RMN-42HN/OUT

16022300000795 INDOOR PIPE OUT OPTIONAL Aoplicable to the units gAC_motor on! DRIVER BOARD FLOW YELLOW L CODE PART NAME CODE PART NAME у COMP. COMPRESSOR: L PEC INDUCTOR САР! РАМ MOTOR CAPACITOR] — 1-Р50 | LOW PRESSURE SWITCH ELECTRIC EXPANSIVE Ip EXHAUS ЕЕУ VAL TEMPERATURE SENSOR FMM OUTDOOR DC FAN…

6. Indoor units combination

6.1 Indoor unit combination for 2RMN-14HN/OUT One unit Two unit 7 7+7 9+9 9 7+9 9+12 12 7+12 18 6.2 Indoor unit combination for 2RMN-18HN/OUT One unit Two unit 7 7+7 9+9 9 7+9 9+12 12 7+12 12+12 18 6.3 Indoor unit combination for 3RMN-21HN/OUT One unit Two unit Three unit 7 7+7 9+9 7+7+7 7+9+9 9 7+9…

7+18 12+18 7+7+18 7+12+12 9+9+18 12+12+12 7+7+7+18 7+7+12+18 7+12+12+12 9+12+12+12 24 7+24 12+24 7+7+24 7+12+18 9+9+24 12+12+18 7+7+9+9 12+12+12+12 9+9 18+18 7+9+9+9 9+9+9+9 7+9+9 7+12+24 9+12+12 9+12 6.6 Indoor unit combination for 5RMN-42HN/OUT One Unit Two Unit Three Unit 7 7+7 9+18 7+7+7 7+9+18…

7. Sound Levels

Outdoor Unit Microphone H 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) 2RMN-14HN/OUT 65 56 2RMN-18HN/OUT 65 54 3RMN-21HN/OUT 66 58 4RMX-28HN/OUT 69 61 4RMX-36HN/OUT 68 63 5RMN-42HN/OUT

8. Installation Details

8.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque mm 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…

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) Gas 9.52(3/8) Gas…

(Indoor unit)

(Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Manifold valve Compound meter Pressure gauge -0.1MPa Lo Handle Lo Charge hose Close Hi Handle Hi Charge hose Vacuum pump Vacuum pump 1) Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the…

2. 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. If the refrigerant is R410A, make the cylinder bottom up to…

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. 2). Purge the air from…

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. 2).…

2. Air purging with vacuum pump

(Indoor unit) (Outdoor unit) (Liquid side) Two-way valve Close (Gas side) Three-way valve Manifold valve Compound meter Pressure gauge -0.1MPa Lo Handle Lo Charge hose Close Hi Handle Hi Charge hose Vacuum pump Vacuum pump Procedure: 1) Completely tighten the flare nuts of the indoor and outdoor…

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). Evacuation for approximately one hour. Confirm that the compound meter indicates -0.1Mpa. 4). Close the valve…

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. Make the cylinder bottom up to ensure liquid charge. 2). Purge the air from the…

9. 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…

9.4 Outdoor unit point check function

A check switch is included on the outdoor PCB. Push SW1 to check the unit's status while running. The digital display shows the following codes each time the SW1 is pushed. For 3RMN-21HN/OUT ,M3OA-27HFN8-Q Number of Presses 0 1 Display Remark Normal display Displays running frequency, running state…

Indoor unit E evaporator temperature (T2E) 32 Condenser pipe temperature (T3) 33 Outdoor ambient temperature (T4) 34 Compressor discharge temperature (TP) 35 AD value of current 36 AD value of AC voltage 37 AD value of DC voltage 38 EXV open angle for A indoor unit 39 EXV open angle for B indoor…

Indoor unit B capacity demand code 10 Indoor unit C capacity demand code 11 Indoor unit D capacity demand code 12 Indoor unit E capacity demand code 13 Outdoor unit amendatory capacity demand code 14 The frequency corresponding to the total indoor units' amendatory capacity demand The frequency…

Outdoor unit fan motor state 45 The last error or protection code 46 F indoor unit capacity 47 F indoor unit capacity demand code 48 49 F indoor unit evaporator outlet temperature (T2BF) F indoor unit room temperature (T1F) 50 F indoor unit evaporator temperature (T2F) 51 EXV open angle for F indoor…

Indoor unit C capacity 6 Indoor unit D capacity 7 Indoor unit E capacity 8 Indoor unit A capacity demand code 9 Indoor unit B capacity demand code 10 Indoor unit C capacity demand code 11 Indoor unit D capacity demand code 12 Indoor unit E capacity demand code 13 Outdoor unit amendatory capacity…

Bit0

by T4, T3, or the current. (Sum T2 value of all indoor units)/(number of indoor units in good connection) Off: 0, Super high speed:1, High speed:2, Med speed: 3, Low speed: 4, Breeze:5, Super breeze: 6 00 means no malfunction and protection 43 Average value of T2 44 Outdoor unit fan motor state 45…

T4

CoolZone5 CoolZone4 CoolZone3 CoolZone2 CoolZone1 Heating mode: T4 HeatZone4 HeatZone3 HeatZone2 HeatZone1 9.5.5 Indoor / outdoor units communication protection If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes, or If the outdoor units cannot receive the…

9.5.9 Low outdoor ambient temperature protection

10. Troubleshooting

10.1 Indoor unit error code explanation: For Aurora type ,All Easy type, Forest type, Four-way cassette type (compact), A6 Duct: Error Code Timer Lamp Operation Lamp (flashes) Indoor EEPROM malfunction Communication malfunction between indoor and outdoor units E0 E1 X X 1 2 Indoor fan speed has been…

For Mission2 type and Ultimate Comfort type

Malfunction Error Code Indoor unit EEPROM parameter error E0/EA Indoor / outdoor units communication error E1 Indoor fan speed is operating outside of the normal range E3 Indoor room temperature sensor T1 open circuit or short circuit E4 Evaporator coil temperature sensor T2 open circuit or short…

6 times

OFF EH 61 12 times OFF EC 07 9 times OFF EH 0b Evaporator coil middle temperature sensor T2 is in open circuit or has short circuited The outdoor fan speed is operating outside of the normal range Indoor PCB/Display board communication error 8 times OFF EL 0C Refrigerant leakage detection 7 times…

10.2 Outdoor unit error code explanation

For other models, Display LED STATUS E0 Outdoor EEPROM malfunction E2 Indoor / outdoor units communication error E3 Communication malfunction between IPM board and outdoor main board E4 Open or short circuit of outdoor unit temperature sensor(T3,T4.T5) E5 Voltage protection E6 PFC module protection…

For 3RMN-21HN/OUT

Display LED STATUS EC 51 Outdoor EEPROM malfunction EL 01 Indoor / outdoor units communication error PC 40 Communication malfunction between IPM board and outdoor main board PC 08 Outdoor overcurrent protection PC 10 Outdoor unit low AC voltage protection PC 11 Outdoor unit main control board DC bus…

EC 50

10.3 Trouble shooting

10.3.1 For the indoor unit 10.3.1.1 Indoor EEPROM malfunction (IDU E0/EA/EH 00/EH 0A) Power off, then restart the unit 2 minutes later Yes Replace the indoor main PCB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.…

10.3.1.2 Indoor / outdoor units communication error(E1(IDU)/ E2(ODU)/ EL 01(IDU/ODU))

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? Yes Check wiring on the outdoor and indoor terminal follow the wiring diagram. Is all connecting correctly? Reconnect the wiring No…

(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 44

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 45

10.3.1.3 Indoor fan speed has been out of control (IDU E3/ EH 03)

PPoow weerr ooffff,, tthheenn rreessttaarrtt tthhee uunniitt22 m miinnuutteessllaatteerr..IIss iittssttiilll ddiissppllaayyiinnggtthheeeerrrroorrccooddee?? No TThheeuunniittooppeerraatteessnnoorrm maalllyy.. Yes SShhuutt ooffff tthhee ppoow weerr ssuuppppllyy,, rroottaattee tthhee ffaann bbyy…

DC motor voltage input and output

CChheecckk tthhee ccoonnnneeccttiioonnss bbeettw mppeerraattuurree weeeenntteem sseennssoorraannddPPCCBB..AArreetthhee ccoonnnneeccttiioonnss ggoooodd?? No CCoorrrreecctttthheeccoonnnneeccttiioonnss.. Yes M Meeaassuurreetthheerreessiissttaanncceevvaalluuee…

10.3.1.7 Communication error between the indoor PCB and display board(IDU Eb/EH 0b)

Power off, then restart the unit 2 minutes later Yes Check the wirings and connection No Correct the connection or replace the wirings Yes Replace the indoor main PCB Yes Replace the Display board 10.3.1.8 Inverter compressor drive malfunction(IDU P4/ PC04) The trouble shooting is same with IPM…

Power off, then restart the unit 2 minutes later

Does a problem remain? YES Put your hands in front of the indoor air outlet. Is there cool air blowing out from indoor air outlet? YES Check the T2 sensor. Is it securely attached? NO YES Check system for leakages. NO Are any leakages present? YES NO Check System for blockages and clear blockages if…

10.3.3 For the outdoor unit

10.3.3.1 Outdoor EEPROM malfunction(ODU E0/EC 51) PPoow weerrooffff,,tthheennrreessttaarrtt tthhee uunniitt 22 m miinnuutteess llaatteerr Yes RReeppllaacceetthheeoouuttddoooorrm maaiinnPPCCBB EEPROM: An electrically erasable programmable read-only memory whose contents can be erased and reprogrammed…

10.3.3.3 Communication malfunction between IPM board and outdoor main board(ODU E3/PC 40)

E3 display Communication malfunction between IPM board and outdoor main board Is there at least one LED in the IPM board light? No Check the signal wire between the IPM board and the main board, is it connected good? Yes No Yes Reconnect and retry. Is error still display? No No Replace IPM board…

10.3.3.4 Voltage protection(ODU E5)

Outdoor unit low AC voltage protection(PC10) Outdoor unit main control board DC bus high voltage protection(PC11) Outdoor unit main control board DC bus high voltage protection /341 MCE error(PC12) Voltage protection Check the voltage of outdoor unit power supply, whether the voltage between L(L1)…

PFC module protection Check whether the connecting line between main board and the PFC module(IPM module) is connected tightly Yes Check whether the voltage range of P-N on IPM module is normal? DC277-356V for 18-27KBtu/h; DC277-410V for 36-42KBtu/h No Connect it tightly, check normal or not No Yes…

10.3.3.6 Outdoor fan speed has been out of control or compressor speed has been out of control

(ODU E8/EC 07) Over current failure of outdoor DC fan motor (ODU EC71) Power off, then restart the unit after 2 minutes. Does a problem remain? NO The unit is operating normally NO Find the cause of the problem and resolve it YES Shut off the power supply, Rotate the fan by hand. Does it turn…

10.3.3.7 High pressure protection (ODU P1/PC 30)(For 4RMX-36HN/OUT, 5RMN-42HN/OUT)

H H Hiiiggghhh ppprrreeessssssuuurrreee ppprrrooottteeeccctttiiiooonnn W W w Whhheeettthhheeerrr ttthhheee w wiirirriin innggg bbbeeetttw w weeeeeennn ttthhheee hhhiig igghhh ppprrreeessssssuuurrreee sssw w m wiitittccchhh aaannnddd m maaaiin inn cccooonnntttrrrooolll bbboooaaarrrdddiis w…

10.3.3.8 Low pressure protection (ODU P2/PC 31) (For 4RMX-36HN/OUT, 5RMN-42HN/OUT)

LLoow w pprreessssuurree pprrootteeccttiioonn W W w Whhheeettthhheeerrr ttthhheee w wiiirrriiinnnggg bbbeeetttw e e n t h e l o w w e e n t h e l o w ween the low ppprrreeessssssuuurrreee ppprrrooottteeeccctttooorrraaannndddm m maaaiiinnncccooonnntttrrrooolll…

Outdoor unit zero speed protection(ODU PC44) Compressor speed has been out of control(ODU PC46) Compressor overcurrent failure(ODU PC49) Current protection of compressor Judge 1: Check whether the input current of the power supply wire is higher than max protection current value Yes Check whether…

10.3.3.10 Temperature protection of compressor discharge (ODU P4/ PC 06)

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. H H m Hiigigghhh ttteeem mpppeeerrraaatttuuurrreee ppprrrooottteeeccctttiio ioonnn ooofff cccooonnndddeeennnssseeerrr…

10.3.3.12 IPM module protection (ODU P6/PC 00)

IPM module protection Check whether the voltage range of P-N on IPM module is normal? DC277-356V for 18-28KBtu/h; DC277-410V for 36-42KBtu/h No Check whether the input power supply is correct? 208-230V, 1N, 60Hz No Regulate it to correct, then check whether the system can work normally? Yes No Yes…

10.3.3.13 Top temperature protection of compressor (ODU P0/ PC 02)

Check if the air flow system of indoor and outdoor units are obstructed? Clear up the air inlet and outlet or the heat exchanger of indoor and outdoor units. Yes No Turn off the power supply and turn it on 10 minutes later. Yes Check if the temperature of compressor Top Is more than 90℃？ Check if…

10.3.3.14 Lack phase failure of outdoor DC fan motor(EC72)

Power off,then restart the unit 2 minutes later.Is it still displaying the error code No The unit operates normally No Correct the connections No Replace the fan motor No Replace the main PCB Yes Check the wiring of fan motor.Are all the connections good? Yes Check whether the threephase resistance…

10.3.3.15 Outdoor compressor lack phase protection(PC43)

Power off,then restart the unit 2 minutes later.Is it still displaying the error code No The unit operates normally No Correct the connections No Replace the compressor No Replace the main PCB Yes Check both ends of compressor connecting line .Are all the connections good? Yes Check whether the…

10.3.3.19 Automatic correction of wiring/piping error

Press the "check switch" on the outdoor unit PCB board 5 seconds until LED display "CE", which mean this function is working, Approximately 5-10 minutes after the switch is pressed, the "CE" disappear the wiring/piping error will be corrected, and wiring/piping is properly connected. Check switch…

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…

Appendix 2 Temperature Sensor Resistance Value Table for T5 (℃--K)

2.Compressor checking

Measure the resistance value of each winding by using the tester. Position Blue - Red Resistance Value KSM135D23UFZ KTF235D22UMT KTF310D43UMT 1.72Ω(20℃) 0.75Ω(20℃) 0.65Ω(20℃) 70

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 (+)Red Normal resistance value (+)Red (-)Black N U P Digital tester (-)Black U ∞ ∞ V (Several…

5.EXV check

Disconnect the connectors. Red Brown Blue Orange Yellow White Resistance to EXV coil Color of lead wire Normal Value Red- Blue About 50Ω Red - Yellow Brown-Orange 72

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