MULTI SPLIT SYSTEM OUTDOOR UNITS SERVICE MANUAL Multi zone Two, Three, Four and Five Zones DC INVERTER MULTI ZONE OUTDOOR UNITS Revision A: ODMI‐E‐1610‐PDB56/2017 Model Numbers: YN020GMFI22M2D YN030GMFI22M3D YN040GMFI22M4D YN050GMFI22M5D Dual (2 Zones) Triple (3 Zones) Quad (4 Zones) Quint (5 Zones) Table of Contents 1. 2. 3. 4. 5. 6. 7. 8. 9.
CONTENTS 1. Indoor Unit Combination .......................................................................................................................................... 3 2. Dimension Of Outdoor Unit...................................................................................................................................... 4 3. Refrigerant Cycle Diagram ........................................................................................................................................
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2. Dimension of the Outdoor Units A B D Model W D H W1 A B mm 845 363 702 923 540 350 inch 33.3 14.3 27.6 36.0 21.3 13.8 mm 946 410 810 1034 673 403 inch 37.2 16.5 31.9 40.6 26.5 15.9 mm 946 410 810 1034 673 403 inch 37.2 16.5 31.9 40.6 26.5 15.9 mm 952 415 1333 1045 634 404 inch 37.5 16.3 52.5 41.1 25.0 15.9 Unit： YN020GMFI22M2D YN030GMFI22M3D YN040GMFI22M4D YN050GMFI22M5D Note: 5 circuit model will have 2 fans.
3. Refrigerant Cycle Diagram 4.1 Refrigeration circuit drawing of inverter DUAL (2 Zone) INDOOR OUTDOOR LIQUID VALVE A EXV A CAPILIARY A CHECK VALVE LIQUID VALVE B EXV B CAPILIARY B CAPILIARY TUBE HEAT EXCHANGE (EVAPORATOR) T4 Ambient temp. sensor T1 Room temp. sensor T3 Condenser temp. sensor HEAT EXCHANGE (CONDENSER) T2B-A Evaporator T2 Evaporator temp. sensor middle GAS VALVE A GAS VALVE B temp. sensor outlet 4-WAY VALVE T2B-B Accumulator T5 Discharge temp.
4.3 Refrigeration circuit drawing of inverter Quad (4 Zone) INDOOR OUTDOOR LIQUID VALVE A LIQUID VALVE B EXV A CAPILIARY A EXV B CAPILIARY B CHECK VALVE LIQUID VALVE C LIQUID VALVE D HEAT EXCHANGE (EVAPORATOR) EXV C CAPILIARY C EXV D CAPILIARY D CAPILIARY TUBE T4 Ambient temp. sensor T1 Room temp. sensor T3 Condenser temp. sensor HEAT EXCHANGE (CONDENSER) T2B-A Evaporator GAS VALVE A T2 Evaporator temp. sensor middle GAS VALVE B GAS VALVE C GAS VALVE D temp.
Additional refrigerant charge 4. Installation Details 5.1 Wrench torque sheet for installation Outside diameter Torque Additional tightening torque mm inch N.cm N.cm Ф6.35 1/4 1500 (11 LbF*Ft) 1600 (12 LbF*Ft) Ф9.52 3/8 2500 (18 LbF*Ft) 2600 (19LbF*Ft) Ф12.7 1/2 3500 (26 LbF*Ft) 3600 (27 LbF*Ft) Pre-charged up to max total pipe length m (ft) Additional refrigerant charge needed beyond total max length g oz 5.
5.4 Installation for the first time: Air and moisture in the refrigerant system will result in significant problems with your system: Pressure in the system rises. Operating current rises. Cooling or heating efficiency drops. Moisture in the refrigerant circuit may freeze and block flow through the expansion devices. ● Water when mixed with the refrigerant and oil will create acid that will damage the motor windings and components of the compressor.
(An electronic leak detector will be more efficient to use for this if available). 14. Re-insert proper size Allen wrench into the valve core of the Liquid Valve (2 way) valve for circuit A and turn it counter clockwise until it is fully back seated. Do not force it, once it stops turning. Repeat the leak checking procedure entirely at all connections of circuit A.
Evacuation using a vacuum pump: 1. Completely tighten ALL brass flare nuts, which connect the ends of copper refrigerant lines to the attached indoor units and the circuit service valves on the outdoor unit using proper torque. 2. Assure that both of the 2-way (Liquid) and 3-way (Gas) valves for Each Circuit at the outdoor unit STAY CLOSED as they arrived. 3. Connect the low pressure hose on your gauge manifold (usually blue) to the 3-way (Gas) valve’s service port, belonging to circuit A.
18. Power up the system, and run the indoor unit for circuit A in COOLING mode to assure that all functions are working. 19. Switch the indoor unit of circuit A to HEAT mode and assure that all functions are working. 20. Set the temperature on remote to HIGHEST setting and while the unit is running in heat mode, check one last time for leaks at all 4 related pipe connections of circuit A. It is easier to catch even smallest leaks in HEAT mode as the pressures are much higher. 21.
6. Set the refrigerant container on an electronic charging scale and record the weight (or zero-out the scale depending on the scale used). 7. Start all indoor units attached to the system in cooling mode and lower the set points on each of their controllers to the minimum setting so the system will not shut off during the procedure. 8. Refrigerant can now be added to the system, open the low side valve at the low pressure side of the gauge manifold set to start charging the unit with liquid refrigerant.
b. If servicing a 3, 4 or 5 zone system, connect only the low pressure hose on your gauge manifold (usually blue) to the 3 way (Gas) valve’s service port, belonging to the COMMON or the MASTER Circuit. Fully open the Low side valve on the low pressure side of your gauge manifold only. See below drawing. 6. Connect the center hose of the gauge manifold (usually yellow) to the vacuum pump. 7. Start the vacuum pump and operate according to pump manufacturer’s specifications. 8.
19. Open the low pressure valve on the gauge manifold set to start charging the unit with liquid refrigerant for the remaining amount. Please remember to nurse the refrigerant in slowly by controlling the low pressure valve at the Low side of your gauge manifold (open for 3 seconds and close for 10 seconds). Keep track of the refrigerant being added into the system until the entire intended volume is charged. (do not overcharge the system). 20.
6. Electronic Function 6.3.3 Fan Speed is out of control. 6.1 Abbreviation ---- When outdoor fan speed is lower than 100RPM or higher than 2400RPM for 60 seconds, the system stops and LED displays E8 failure. T1: Indoor ambient temperature T2: Coil temperature of indoor heat exchanger at middle circuit. 6.3.4 Inverter module Protection. T4: Outdoor ambient temperature ----Inverter module protection safeguards the system against current, voltage and temperature abnormalities.
Cooling mode: HeatT4Zone3I Heating 14＞T4≥10℃ limit CoolT4Zone5I ℃ current value Heating 9＞T4≥6℃ limit current value Heating 5＞T4 limit current value Heating stop protection current value HeatT4Zone2I HeatT4Zone1I HeatStopI 50 49 CoolT4Zone4I 45 44 6.3.7 Indoor / outdoor unit communication protection If the indoor units cannot receive the feedback signal from the outdoor units for 2 minutes, the system will stop and display the failure. 41 CoolT4Zone3I 40 6.3.8 High condenser coil temp.
6.4 Control and Functions Heating mode 6.4.1 Capacity Request Calculation T1 Ts Total capacity Request=Σ(Norm code × HP) /10 + correction Cooling mode: 4 3 2 1 0 f e d c b a T1 Ts a 3 2 1 0 1 b c d 4 3 2 1 e 0 f Capacity area a b c d e f Norm code (N) 3 2 1.5 1 0.5 0 3 2 1 0 -1 Capacity area a b c d e f Norm code (N) 3 2 1.5 1 0.5 0 Model 9K 12K 18K 24K HP 1.0 1.2 1.5 2.5 Note: The final result is an integer.
6.4.2 Defrosting control ① T3 > TempQuitDefrost_ADD ℃;. Condition of defrosting: ② The defrosting time reaches 10min. If any one of the following items is satisfied, system will enter into the defrosting cycle. ③ Turn to other modes or off. After the compressor starts up and keeps running, marks the minimum value of T3 from the 10th minute to 15th minute as T30. 6.4.3 Outdoor fan control 1) If the compressor’s cumulate running time is up to 29 minutes and T3< TCDI1, T3＋ T30SUBT3ONE ≦ T30.
6.4.4.1 Cooling mode T3 6.4.3.2 Heating mode The initial open angle of EXV is depends on indoor model size, and the adjustment range is 100-400p. When the unit starts to work for 3 minutes, the outdoor will receive indoor units’ capacity demand (T2B) information and calculate their average.
7. Wiring Diagrams 8.
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8. Troubleshooting 8.1Safety Because there are high power capacitors on PCB and related circuits in outdoor unit, even after shutting down the power supply, risk of electrocution still exists. Do not forget to discharge the electrical power in these capacitors. Use a 25~40 W bulb or resistor with resistance value of about 1500 ohm to 2000 ohm to discharge the power in the capacitors. .
8.
For 2015 or earlier Concealed Duct / Cassette / Floor Ceiling Models: RB012GMFI16HLD, RB018GMFI16HLD (2015 and earlier) CB012GMFI16HLD, CB018GMFI16HLD (2015 and earlier) UB012GMFI16HLD, UB018GMFI16HLD (2015 and earlier) Operation Timer Defrost Alar m Failure Display ODU Error code ★ X X X Indoor room temperature sensor (T1 ) malfunction E0 —— X X ★ X Evaporator coil temperature sensor (T2) malfunction E1 —— X ★ X X Communication malfunction between indoor and outdoor units E2 E2
For 2015 or earlier Wall Mount Models WB009GMFI16HLD, WB012GMFI16HLD, WB018GMFI16HLD (2015 and earlier) De-frost Timer Auto Operatio ★ ★ ★ ★ X Failure Indoor unit EEPROM parameter error Communication malfunction between indoor and Display E0 E1 outdoor units error ★ ★ X ★ ★ ★ Zero-crossing signal detection error Indoor fan speed has been out of control Outdoor temperature sensor(coil sensor T3 or ambient temperature sensor T4) malfunction or ★ Outdoor unit EEPROM p
For All 2016 and newer Models: Wall Mount, Concealed Duct / Cassette / Floor Console / Floor Ceiling): 1) Wall Mounted: WS009GMFI22HLD, WS012GMFI22HLD, WS018GMFI22HLD, WS024GMFI22HLD. 2) Ceiling Concealed: RB009GMFILDFHD, RB012GMFILDFHD, RB018GMFILDFHD, RB024GMFILDFHD. 3) Cassette: CB009GMFILDFHD, CB012GMFILDFHD, CB018GMFILDFHD, CB024GMFILDFHD. 4) Floor Console: FB009GMFILDFHD, FB012GMFILDFHD. 5) Floor / Ceiling: UB018GMFILDFHD, UB024GMFILDFHD.
Outdoor unit error display YN020GMFI22M2D, YN030GMFI22M3D, YN040GMFI22M4D, YN050GMFI22M5D, Display E0 E2 E5 E6 E8 LED STATUS Outdoor unit EEPROM parameter error Communication malfunction between indoor and outdoor units Communication malfunction between IPM board and outdoor main control board Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor discharge sensor T5、indoor coil outlet pipe sensor T2B) malfunction Over-voltage or under-voltage protection PFC module protection Outdoor fan
8.3 Outdoor Unit Display 8.3.1 Outdoor unit point check function: There is a pushbutton switch in the outdoor PCB as marked below (SW1). Push the switch SW1 to check the states of unit when it is running. The digital display LED will display the following information after pushing the SW1 each time. See below table indicating the information displayed for the number sequence of presses of the button.
15 The frequency after the frequency limit 16 17 The frequency sending to compressor control chip A indoor unit evaporator outlet temp.(T2BA) 18 B indoor unit evaporator outlet temp.(T2BB) 19 C indoor unit evaporator outlet temp.(T2BC) 20 D indoor unit evaporator outlet temp.(T2BD) 21 E indoor unit evaporator outlet temp.(T2BE) 22 A indoor unit room temp.(T1A) 23 B indoor unit room temp.(T1B) 24 C indoor unit room temp.(T1C) 25 D indoor unit room temp.(T1D) 26 E indoor unit room temp.
8.3.2 Outdoor unit’s digital display LED will display the following information except in the checking mode as described above: In standby , the LED displays “- -” During the compressor is operating, the LED display the running frequency, In defrosting mode, The LED displays “dF” or alternatively displays between running frequency and “dF” (each displays 0.
8.4 Diagnosis and Solution 8.4.1 Indoor unit trouble shooting 8.4.1.1 Indoor unit EEPROM parameter error diagnosis and solution. Malfunction decision conditions PCB main chip does not receive feedback from EEPROM chip ● Installation mistake ● PCB faulty Trouble shooting: Supposed causes EEPROM: a read‐only memory whose contents can be erased and reprogrammed using a pulsed voltage.
8.4.1.2 Communication malfunction between indoor and outdoor units diagnosis and solution. Malfunction decision conditions Supposed causes Indoor unit does not receive the feedback from outdoor unit during 120 seconds.
Pic 1: Use a multimeter to test the DC voltage between 2 (previously: L2) port and S port of outdoor unit. The red pin of multimeter connects with 2 (previously: L2) port while the black pin is for S port. (Set multimeter to read DC volts) When AC is normally running, the voltage will move alternately between positive value and negative value.
Pic 2: IPM (for 2 zone/ 3-zone) Pic 1: Use a multimeter to test the DC voltage between 2(old: L2) port and S port of outdoor unit. The red pin of multimeter connects with 2(old: L2) port while the black pin is for SOperating port. Standby When AC is normal running, the voltage will move alternately between positive value and negative value.
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. 8.4.1.3 Zero-crossing signal detection error diagnosis and solution. Malfunction decision conditions Supposed causes When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.
8.4.1.4 Indoor fan speed has been out of control diagnosis and solution. Malfunction decision conditions Supposed causes When indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display the failure.
Index 1: 1: Indoor AC fan motor Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the voltage of pin1 and pin2. If the value 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 when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector.
8.4.1.5 Temperature sensor malfunction diagnosis and solution. If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure. Malfunction decision conditions Supposed causes ● Wiring mistake ● Sensor faulty ● PCB faulty Trouble shooting: Check the connections between temperature sensor and PCB. Are the connections good? No Correct the connections.
8.4.1.6 Inverter module (IPM) malfunction diagnosis and solution. When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P6” and AC will turn off.
8.4.1.7 Over-voltage or under-voltage protection diagnosis and solution.
8.4.1.8 Compressor top high temperature protection (OLP) diagnosis and solution. Malfunction decision conditions Supposed causes If the sampling voltage is not 5V, the LED will display the failure.
8.4.1.9 Compressor drive malfunction diagnosis and solution The trouble shooting is same with one of IPM module protection(P0). 8.4.1.10 Water-level alarm malfunction diagnosis and solution Malfunction decision conditions Supposed causes If the sampling voltage is not 5V, the LED will display the failure.
8.4.1.11 Indoor unit mode conflict (Between indoor units). Error Code P5 OR -- (Double Dash) Malfunction decision conditions The indoor units cannot work cooling mode and heating at same time. Heating mode has a priority. Unit action ● Suppose Indoor unit A working in cooling mode or fan mode, and indoor unit B is set to heating mode, then A will change to off and B will work in heating mode.
8.4.2 Outdoor unit trouble shooting 8.4.2.
8.4.2.2 E2(Communication malfunction between indoor and outdoor units) diagnosis and solution. Error Code E2 Malfunction decision conditions Supposed causes Indoor unit does not receive the feedback from outdoor unit during 120 seconds or outdoor unit does not receive the feedback from any one indoor unit during 180 seconds.
Pic 1: Use a multimeter to test the DC voltage between 2 (previously: L2) port and S port of outdoor unit. The red pin of multimeter connects with 2 (previously: L2) port while the black pin is for S port. (Set the multimeter to read DC volts When AC is normal running, the voltage will move alternately between positive value and negative value.
Pic 2: IPM board (for 2 zone/ 3-zone) Operating Standby Pic 2: IPM (for5 zone) Operating Standby Power
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.
8.4.2.3 E3 (Communication malfunction between IPM board and outdoor main control board) diagnosis Error Code E3 Malfunction decision conditions Supposed causes PCB main chip does not receive feedback from IPM module during 60 seconds.
Remark: Use a multimeter to test the DC voltage between black pin and white pin of signal wire The normal value should be around 5V. Use a multimeter to test the DC voltage between black pin and red pin of signal wire. The normal value should be around 12V.
8.4.2.4 E4 (Outdoor temperature sensor (coil sensor T3,ambient sensor T4, Compressor discharge sensor T5、indoor coil outlet pipe sensor T2B) malfunction) diagnosis and solution F1/F2/F3/F4/F5 (No.A,B,C,D,E Indoor unit coil outlet temp. sensor malfunction) diagnosis and solution. . Error Code E4/F1/F2/F3/F4/F5 Malfunction decision conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.
8.4.2.5 E5 (Over-voltage or under-voltage protection) diagnosis and solution. Error Code Malfunction decision conditions Supposed causes Trouble shooting: E5 An abnormal voltage rise or drop is detected by checking the specified voltage detection circuit. ● Power supply problems.
IPM board (for 2-zone /3-zone) Bridge rectifier (for 2-zone/3-zone) Remark: Measure the DC voltage between + and - port. The normal value should be 190V~250V.
IPM board (for 4-zone) Bridge rectifier (for 5-zone) Remark: Measure the DC voltage between + and - port. The normal value should be 190V~250V.
IPM Module (for 5-zone)
8.4.2.6 E6 (PFC module protection) error diagnosis and solution. Error Code E6 Malfunction decision conditions When the voltage signal that PFC sends to main control board is abnormal, the display LED will show “E6” and AC will turn off.
Inductance Two ports of the inductance
8.4.2.7 E8 (Outdoor fan speed has been out of control) diagnosis and solution Error Code E8 Malfunction decision conditions Supposed causes Trouble shooting: When outdoor fan speed keeps too low (300RPM) or too high(2400RPM) for certain time, the unit will stop and the LED will display the failure.
Index 1: 1. DC fan motor (control chip is inside fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must have problems and need to be replaced. DC motor voltage input and output NO. Color Signal Voltage 1 2 Red Vs/Vm 200~380V --- --- --- 3 Black GND 0V 4 White Vcc 13.5~16.5V 5 Yellow Vsp 0~6.5V 6 Blue FG 13.5~16.
Vsp FG
8.4.2.8 P0 (Compressor top high temperature protection (OLP)) diagnosis and solution. Error Code Malfunction decision conditions Supposed causes Trouble shooting: P0 If the sampling voltage is not 5V, the LED will display the failure.
8.4.2.9 P1 (High pressure protection) diagnosis and solution. Error Code Malfunction decision conditions Supposed causes Trouble shooting: P1 If the sampling voltage is not 5V, the LED will display the failure.
8.4.2.10 P2 (Low pressure protection) diagnosis and solution. Error Code Malfunction decision conditions Supposed causes Trouble shooting: P2 If the sampling voltage is not 5V, the LED will display the failure.
8.4.2.11 P3 (Current overload protection) diagnosis and solution. Error Code Malfunction decision conditions Supposed causes Trouble shooting: P3 If the outdoor current exceeds the current limit value, the LED will display the failure.
8.4.2.12 P4 (Temperature protection of compressor discharge) diagnosis and solution. Error Code Malfunction decision conditions P4 When the compressor discharge temperature(T5) is more than 115℃ for 10 seconds, the compressor will stop and restart till T5 is less than 90℃. Supposed causes ● ● ● ● Refrigerant leakage Wiring mistake The discharge temperature sensor faulty Outdoor PCB faulty Trouble shooting: Temperature protection of compressor discharge Check whether the compressor discharge temp.
Error Code Malfunction decision conditions Supposed causes Trouble shooting: P5 When outdoor pipe temperature is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temperature is less than 52°C ● The condenser temperature sensor faulty ● Heat exchanger dirty ● System block
8.4.2.14 P6 (Inverter module (IPM) malfunction) diagnosis and solution. Error Code Malfunction decision conditions Supposed causes Trouble shooting: P6 When the voltage signal that IPM send to compressor drive chip is abnormal, the display LED will show “P6” and AC will turn off.
8.4.2.15 The cooling operation or heating operation does not operate. Supposed causes ● 4-way valve faulty Check of 4-way valve, please refer to part 5 in 9.5 Trouble Criterion of Main Parts. 8.4.2.16 When cooling, heat exchanger of non-operating indoor unit frosts. When heating, non-operating indoor unit get warm. Supposed causes ● EXV faulty ● Wire and tubing connected in reverse. Check of EXV, please refer to part 6 in 9.5 Trouble Criterion of Main Parts. 8.5 Trouble Criterion of Main Parts.
Appendix 1 Temperature Sensor Resistance Value Table (℃--K) K Ohm K Ohm K Ohm K Ohm ℃ -20 115.266 ℃ 20 12.6431 ℃ 60 2.35774 ℃ 100 0.62973 -19 108.146 21 12.0561 61 2.27249 101 0.61148 -18 101.517 22 11.5000 62 2.19073 102 0.59386 -17 96.3423 23 10.9731 63 2.11241 103 0.57683 -16 89.5865 24 10.4736 64 2.03732 104 0.56038 -15 84.2190 25 10.000 65 1.96532 105 0.54448 -14 79.3110 26 9.55074 66 1.89627 106 0.52912 -13 74.5360 27 9.12445 67 1.
Appendix 2 Unit: ℃---K Discharge temp. sensor table -20 542.7 20 68.66 60 13.59 100 3.702 -19 511.9 21 65.62 61 13.11 101 3.595 -18 483 22 62.73 62 12.65 102 3.492 -17 455.9 23 59.98 63 12.21 103 3.392 -16 430.5 24 57.37 64 11.79 104 3.296 -15 406.7 25 54.89 65 11.38 105 3.203 -14 384.3 26 52.53 66 10.99 106 3.113 -13 363.3 27 50.28 67 10.61 107 3.025 -12 343.6 28 48.14 68 10.25 108 2.941 -11 325.1 29 46.11 69 9.902 109 2.
Appendix 3: ℃ ℉ ℃ ℉ 10 48 23 74 11 50 24 76 12 52 25 78 13 54 26 80 14 56 27 82 15 58 28 84 16 60 29 86 17 62 30 88 18 64 31 90 19 66 32 92 20 68 33 94 21 70 34 96 22 72 35 98 2. Compressor check Measure the resistance value of each winding by using the tester. Resistance Value Position Blue - Red ATM150D23UFZ ATF235D22UMT ATF250D22UMT ATF310D43UMT ATQ360D1UMU ATQ420D1UMU 1.72 Ω 0.75 Ω 0.75 Ω 0.65 Ω 0.37 Ω 0.
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 P (-)Black N U V W Normal resistance value Normal resistance value Digital tester (+)Red U V W (+)Red ∞ (Several MΩ) (-)Black ∞ N (Several MΩ) 4. AC Fan Motor. Measure the resistance value of each winding by using the tester.
Position Resistance Value YDK706FB YDK180-8GB YSK27-4G YSK68-4B YDK45-6B YSK25-6L YDK536FB(B) Black Red 56Ω±8% (20℃) 24.5Ω±8% (20℃) 317Ω±8% (20℃) 145Ω±8% (20℃) 345Ω±8% (20℃) 627Ω±8% (20 ℃) 88.5Ω±8% (20℃) Red Yellow 76Ω±8% (20℃) 19Ω±8% (20 ℃) 252Ω±8% (20℃) 88Ω±8% (20 ℃) 150Ω±8% (20℃) 374.3Ω±8% (20℃) 138Ω±8% (20℃) Yellow Blue 76Ω±8% (20℃) 19Ω±8% (20 ℃) 252Ω±8% (20℃) 88Ω±8% (20 ℃) 150Ω±8% (20℃) 374.3Ω±8% (20℃) 138Ω±8% (20℃) 5.4-way valve 1.
6.EXV check Disconnect the connectors.
Red- Blue Red - Yellow
Brown-Orange Brown-White
9. Disassembly Instructions Note: This part is for reference, the photos may have slight difference with your machine. DUAL (2 ZONE) OUTDOOR UNIT (WCA30 metal plate) No . 1 Part name Procedures Fan assembly How to remove the fan Remarks assembly. 1) Turn off the air conditioner ② and turn off the power breaker. 2) Remove the screws of air outlet grille(4 screws) 3) Remove the hex nut fixing the fan. 4) Remove the fan.
cover. (3 screws) 6) Remove the cover of electrical control box. ⑦ 7) Disconnect the fan motor connector CN14(3p,white) from the IPM board. ⑧ 8) Remove the fan motor after unfastening four fixing screws. 2 Panel plate How to remove the panel plate. Screws of front panel 1) Remove the screws of front panel, and remove the front panel.
2) Remove the screws of big Screws of front panel handle, and remove the big handle.(4 screws) 3) Remove two screws of terminal board and seven screws of right-rear panel, Screws of big handle and remove the right-rear panel.
3 Electrical parts How to remove the electrical parts. 1) Perform work of item 1,2. 2) Remove the four screws fixing the IPM board. IPM board 3) PCB board Unfasten the connector ④ of the reactor. 4) Unfasten the connector of the compressor. 5) ③ Disconnect following 3 pieces of connection wires and connectors between IPM and main control PCB. CN1(5p,white) CN14(3p,white) CN4(red or brown) CN5(blue) 6) Remove the IPM board.
CN17:T3/T4 temperature sensor CN17 CN15 CN7 CN18/CN19 CN25/CN23 (2p/2p,white) CN7: Discharge temperature sensor (2p,white) CN15:T2B-A,B temperature sensor (2p/2p,white) CN18/CN19: Electronic expansive valve A,B (6p/6p,red/red) CN25/CN23: S-A,S-B (3p/3p,white/white) Wires: CN1/CN2: 4-way valve (blue-blue) CN1/CN2 CN5/CN6 CN3 CN4 CN5/CN6: Crankcase heating cable (red-red) CN3:L-IN (red) ⑧ CN4:N-IN (black) 8) Disconnect the grounding wire (yellow-green) after removing the big handle and the right
4 Compressor How to remove the compressor. 1) Perform work of item 1,2. 2) Remove the cover of electrical control box. 3) Extract refrigerant gas. 4) Remove the sound insulation material and crankcase heating cable. 5) Remove terminal cover of compressor, and disconnect wires of ⑥ crankcase electric heater and compressor from the terminal. 6) Remove the discharge pipe and suction pipe with a burner. 7) Remove the hex nuts and washers fixing the compressor to bottom ⑦ plate. 8) Lift the compressor.
5 Reactor How to remove the reactor 1) Perform work of item 2 2) Unfasten the connector between IPM and reactor. 3) Remove three screws of ② reactor, and remove the reactor. Screws of cover of inductance 6 The 4-way valve How to remove the 4-way valve 1) Perform work of item 2. 2) Extract refrigerant gas. 3) Remove the electrical parts from item 3. 4) Remove fixing screw of the coil, and remove the coil. 5) Detach the welded parts of 4-way valve and pipe.
7 The expansion valve How to remove the expansion valve 1) Perform work of item 1,2. 2) Remove the electrical parts Expansion valves from item 3.. 3) Remove the coils. 4) Detach the welded parts of Coils expansion valves and pipes. TRIPLE (3 ZONE) OUTDOOR UNIT (WD30 metal plate) No. Part name Procedures Remarks How to remove the panel 1 Panel plate Screws of big handle plate. 1) Screws of top cover Turn off the air conditioner. Turn off the power breaker.
panel, and remove the front panel. (8 screws) Screws of front panel Screws of right front side panel Screws of front panel 6) Remove two screws of terminal board, screws of water collector and fifteen screws of right-rear panel, and remove the right-rear panel.
Screws of right-rear panel Screws of terminal board 108
How to remove the fan 2 Fan assembly assembly. 1) Remove the top cover, right front side panel and ② front panel from item 1.step 1~4 2) Remove the hex nut fixing the fan. ④ 3) Remove the fan. 4) Remove the cover of electrical control box cover. 5) Disconnect the fan motor connector CN14(5p,white) from the IPM board. 6) Remove the fan motor after unfastening four fixing screws.
How to remove the electrical 3 Electrical parts ③ parts. 1) Perform work of item 1,2. 2) Remove the four screws fixing the IPM board. 3) Unfasten the connector of the reactor. 4) IPM board PCB board Unfasten the connector of the compressor. 5) Disconnect following 3 ④ pieces of connection wires and connectors between IPM and PCB. CN1(5p,white) CN14(3p,white) CN3(red or brown) CN5(blue) ⑥ 6) Remove the IPM board.
7) Disconnect the CN17 connectors and wires CN15 CN7 CN18/CN19/CN22 connected from PCB and other parts.
How to remove the 4 Compressor compressor. 1) Perform work of item 1,2,3. 2) Remove the electrical control box and partition plate. 3) Extract refrigerant gas. ⑥ 4) Remove the sound insulation material and crankcase heating cable. 5) Remove terminal cover of compressor, and disconnect wires of compressor thermo and compressor from the terminal. 6) Remove the discharge pipe and suction pipe with a burner. 7) Remove the hex nuts and washers fixing the compressor to bottom plate. 8) Lift the compressor.
5 Reactor How to remove the reactor 1) Perform work of item 1,2 2) Unfasten the connector between IPM and reactor. 3) Remove two screws of cover of inductance, and remove the cover of Screws of cover of inductance inductance 4) Disconnect two pieces of wires connected from the cover of inductance. 5) Remove four screws of reactor, and remove the Screws of reactor reactor. 6 The 4-way valve How to remove the 4-way valve Coil 1) Perform work of item 1,2. 2) Extract refrigerant gas.
7 The expansion valve How to remove the expansion valve 1) Perform work of item 1,2. 2) Remove the electrical parts Expansion valves from item 3. 3) Remove the coils. 4) Detach the welded parts of expansion valves and pipes. QUAD (4 ZONE) OUTDOOR UNIT (WD30 metal plate) No . Part name Procedures Remarks How to remove the panel 1 Panel plate Screws of big handle plate. 1) Turn off the air conditioner. Screws of top cover Turn off the power breaker.
panel, and remove the front panel. (8 screws) Screws of front panel Screws of right front side panel Screws of front panel 6) Remove two screws of terminal board, screws of water collector and fifteen screws of right-rear panel, and remove the right-rear panel.
Screws of right-rear panel Screws of terminal board How to remove the fan 2 Fan assembly assembly. 1) Remove the top cover, ② right front side panel and front panel from item 1.step 1~4 2) Remove the hex nut fixing the fan.
3) Remove the fan. ④ 4) Unfix the hooks and remove the screws, then open the electronic control box. 5) Disconnect the fan motor ⑤ connector CN19(3p,white) from the driver board. Remove the fan motor 6) after unfastening four fixing screws. ⑥ How to remove the electrical 3 Electrical parts parts. 1) Perform work of item 1,2. 2) Unfasten the connector of the reactor. 3) Unfasten the connector ③ 4) Unfasten the connector of the PFC inductor. 5) PCB board Driver board of the compressor.
pieces of connection wires and connectors between driver ④ board and PCB. CN55-CN7(7p,white) CN54-CN6(red) CN53-CN5(black) 6) Remove the fixing screws, then move the driver board. 7) Disconnect the CN53 connectors and wires CN54 connected from PCB and other parts.
CN10/CN44: Crankcase heating cable (black-red) CN2:L2-IN (black) 8) CN13 CN33 CN3 CN4 CN10 CN22 CN40 CN44 CN1:L1-IN (red) Disconnect the CN2 CN1 grounding wire (yellow-green) after removing the right-rear panel. 9) Remove the PCB board. ⑧ How to remove the 4 Compressor compressor. 1) Perform work of item 1,2,3. 2) Remove the electrical control box and partition plate. 3) Extract refrigerant gas. 4) Remove the sound insulation material and crankcase heating cable.
6) Remove the discharge pipe and suction pipe with a burner. 7) Remove the hex nuts and washers fixing the compressor to bottom plate. 8) Lift the compressor. 5 The 4-way valve How to remove the 4-way valve Coil 1) Perform work of item 1,2. 2) Extract refrigerant gas. 3) Remove the electrical parts Welded parts from item 3. 4) Remove fixing screw of the coil, and remove the coil. 5) Detach the welded parts of 4-way valve and pipe.
QUINT (5 ZONE) OUTDOOR UNIT (WE30 metal plate) No . 1 Part name Procedures Fan assembly How to remove the fan Remarks assembly. 1) Turn off the air ② conditioner. Turn off the power breaker. 2) Remove the screws of air outlet grille(8 screws) 3) Remove the hex nut fixing the fan. 4) Remove the fan. ③ Screws of top 5) Remove the screws of top cover, and remove the top cover.
6) Remove the screws of front side panel, and remove the front side panel (1 screw) 7) Disconnect the fan motor connectors FAN1(3p,white) and FAN2(3p,white) from DC motor driver board. ⑥ 8) Remove the fan motor after unfastening fixing screws.
2 Panel plate How to remove the panel plate. 4) Remove big handle.(2 Screws of big handle screws) and water collector(2 screws) 5) Remove 2 screws of Screws of Water collector terminal board and 15 screws of right-rear panel, and remove the right-rear Screws of terminal board panel. Screws of rightrear panel Screws of rightrear panel 3 Electrical parts How to remove the electrical parts. 1) Perform work of item 1 step 5~6 and item 2.
DC Fan Driver board 2) Disconnect the fan motor Connector(5p,white) from the IPM board. 3) Disconnect following 8 pieces of connection wires and connectors between IPM and other parts. CN2(yellow) CN1(red) CN6(black) CN3(yellow) U、V、W(black) CN9(10p,white) 4) Remove the fixing screws then remove the IPM board. 5) Disconnect the connectors and wires connected from PCB and other parts.
(2p,white) CN3 CN1 CN12：Heatsink temperature sensor(2p,red) CN9:T3/T4 temperature sensor (2p/2p,white) CN13 CN16 CN21 CN29 CN37 CN11:T2B-A,B,C,D,E temperature sensor (2p/2p/2p/2p/2p,white) CN15/CN23/CN26/CN30/CN33: Electronic expansive valve (6p/6p/6p/6p/6p,red) CN8 CN12 CN9 CN11 CN37/CN29/CN21/CN16/CN13: SA,S-B,S-C,S-D,S-E (3p/3p/3p/3p/3p,white) CN10: High and low pressure switch (2p/2p, white) Wires: CN17/CN18: 4-way valve (blue-blue) CN10 CN30/CN23 CN19/CN20: connected to crankcase heating cable.
4 Compressor How to remove the compressor. 1) Perform work of item 1 step 5~6 and item 2.. 2) Extract refrigerant gas. ⑤ 3) Remove the sound insulation material and crankcase heating cable. 4) Remove terminal cover of compressor, and disconnect wires of crankcase electric heater and compressor from the terminal. 5) Remove the discharge pipe and suction pipe with a burner. ⑥ 6) Remove the hex nuts and washers fixing the compressor to bottom plate. 7) Lift the compressor.
5 The 4-way valve How to remove the 4-way valve 6) Perform work of item 1 step 5~6 and item 2.. Coil 7) Extract refrigerant gas. Welded parts 8) Remove the electrical parts from item 3. 9) Remove fixing screw of the coil, and remove the coil. 10) Detach the welded parts of 4-way valve and pipe. 6 The expansion valve How to remove the expansion valve 5) Perform work of item 1,2. 6) Remove the electrical parts from item 3.. 7) Remove the coil. 8) Detach the welded parts of expansion valves and pipes.
