Midea MOAB30-09HFN8-QRD0GW Service Manual Download Page 142

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

Troubleshooting



TS06-INV: Refrigerant Leakage Detection diagnosis and solution

Description

: Define the evaporator coil temperature T2 of the compressor just starts running as Tcool.

In the beginning 5 minutes after the compressor starts up, if T2

Tcool-1°C(1.8°F) does not keep continuous 4 seconds

and compressor running frequency higher than 50Hz does not keep for 3 minutes, and this situation happens 3 times,
the LED displays the failure code and the AC turns off.

Recommended parts to prepare:

• T2 sensor

• Indoo

r PCB

• Additional refrigerant

Troubleshooting and repair

Power off, then restart the unit 2 minutes later.

Are any leakages

present?

Check System for blockages and

clear blockages if present.

Does a problem remain?

Put your hands in front of the

indoor air outlet.

YES

Is there cool

air blowing out from

indoor air outlet?

Is it securely

attached?

Replace the

indoor PCB

YES

Check the T2 sensor.

YES

Check system for leakages.

Repair the leakage and

recharge the refrigerant.

YES

Summary of Contents for MOAB30-09HFN8-QRD0GW

Page 1: ...BLANC INVERTER SERIES SM_MA GA _R32_INV_EU_NA_1909 SERVICE MANUAL ...

Page 2: ......

Page 3: ... Height 3 Electrical Wiring Diagrams Product Features 1 Display Function 2 Safety Features 3 Basic Features 4 Optional Features Maintenance 1 First Time Installation Check 2 Refrigerant Recharge 3 Re Installation Indoor Unit Disassembly 1 Dimension 2 Indoor Unit Disassembly Outdoor Unit Disassembly 1 Outdoor Unit Table 2 Dimension 3 Outdoor Unit Disassembly ...

Page 4: ...ry 5 Error Diagnosis and Troubleshooting Without Error Code 6 Quick Maintenance by Error Code 7 Troubleshooting by Error Code 8 Check Procedures Appendix i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K ii Temperature Sensor Resistance Value Table for TP for some units C K iii Pressure On Service Port ...

Page 5: ......

Page 6: ...Contents 1 Precautions 2 2 Information servicing For flammable materials 3 Safety Precautions ...

Page 7: ...ld perform electri cal work For more information contact your dealer seller or an authorized service center CAUTION While unpacking be careful of sharp edges around the unit as well as the edges of the fins on the con denser and evaporator 1 3 Operation and Maintenance WARNING Do not use defective or under rated circuit breakers Ensure the unit is properly grounded and that a dedicated circuit and...

Page 8: ...o work taking place the area around the equipment is to be surveyed to make sure that there are no flammable hazards or ignition risks NO SMOKING signs shall be displayed 2 7 Ventilated area Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work A degree of ventilation shall continue during the period that the work is carr...

Page 9: ...ion of refrigerant in the atmosphere from a leak 2 12 Cabling Check that cabling will not be subject to wear corrosion excessive pressure vibration sharp edges or any other adverse environmental effects The check shall also take into account the effects of aging or continual vibration from sources such as compressors or fans 2 13 Detection of flammable refrigerants Under no circumstances shall pot...

Page 10: ...e use of reclaimed refrigerant It is essential that electrical power is available before the task is commenced Become familiar with the equipment and its operation Isolate system electrically Before attempting the procedure ensure that mechanical handling equipment is available if required for handling refrigerant cylinders all personal protective equipment is available and being used correctly th...

Page 11: ...ciated electrical components are sealed to prevent ignition in the event of a refrigerant release Consult manufacturer if in doubt The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder and the relevant Waste Transfer Note arranged Do not mix refrigerants in recovery units and especially not in cylinders If compressors or compressor oils are to be ...

Page 12: ...Contents 1 Model Reference 2 2 Pipe Length and Drop Height 3 3 Electrical Wiring Diagrams 4 Specifications ...

Page 13: ...Capacity Btu h Power Supply MSMABU 09HRDN8 QRD0GW MOAB30 09HFN8 QRD0GW 9k 220 240V 50Hz 1Phase MSMABU 09HRDN8 QRD0GW MOX133 09HFN8 QRD0GW MSMABU 12HRDN8 QRD0GW MOAB30 12HFN8 QRD0GW 12k MSMABU 12HRDNX QRD0FGW GA MOX133 12HFN8 QRD0GW MSMACU 18HRFN8 QRD0GW MOB32 18HFN8 QRD0GW 18k MSMADU 24HRFNX QRD0GW MOCA32 24HFN8 QRD0GW 24k Specifications 2 ...

Page 14: ...ssor this might cause liquid compression or deterioration of oil return Oil traps in the rising gas pipe can prevent this 1 Indoor unit is installed higher than outdoor unit 2 Outdoor unit is installed higher than indoor unit If indoor unit is installed higher than outdoor unit oil trap should be set every 10m 32 8ft of vertical distance If the outdoor unit is installed higher than the indoor unit...

Page 15: ...12HRDN8 QRD0GW MOAB30 12HFN8 QRD0GW MSMABU 12HRDNX QRD0FGW GA MOX133 12HFN8 QRD0GW MSMACU 18HRFN8 QRD0GW MOB32 18HFN8 QRD0GW MSMADU 24HRFNX QRD0GW MOCA32 24HFN8 QRD0GW 16022000019069 utdoor unit printed circuit board diagram Outdoor Unit ODU Model ODU Printed Circuit Board MOAB30 09HFN8 QRD0GW 17122000040049 MOAB30 12HFN8 QRD0GW MOX133 09HFN8 QRD0GW 17122000048121 MOX133 12HFN8 QRD0GW MOB32 18HFN8...

Page 16: ...Coil Temperature of Indoor Heat Exchanger Outdoor unit abbreviations Abbreviation Paraphrase 4 WAY Gas Valve Assembly 4 WAY VALVE AC FAN Alternating Current FAN DC FAN Direct Current FAN CT1 AC Current Detector COMP Compressor T3 Coil Temperature of Condenser T4 Outdoor Ambient Temperature TH Compressor Suction Temperature TP Compressor Discharge Temperature EEV Electronic Expansion Valve L PRO Lo...

Page 17: ...ULTI and MONO unit without 1W standby control feature X Y E 12V 5V HA HB To CCM Comm Bus or 485 Wire controller To Randomly Connected Wire controller To Remote Switch To Remote Alarm 4 3 This symbol indicates the element is optional the actual shape shall prevail M M M 5 3or2 ION OPTIONAL Y G 3 Applicable to AC motor only OPTIONAL CAP 2 OPTIONAL OPTIONAL CN701 SWITCH BOARD 2 ...

Page 18: ...Outdoor unit wiring diagram 16022000019533 ...

Page 19: ...LACK BLUE OPTIONAL H EATER 2 HEATER 1 OPTIONAL C N 4 BROWN BLUE 16022000019069 YELLOW 3 Applicable to the units adopting DC motor only Applicable to the units adopting AC motor only CN3 CN30 TO I NDO O R UNI T PO W ER SUPPLY Y G OPTIONAL OPTIONAL ...

Page 20: ...Outdoor unit printed circuit board diagram 17122000040049 ...

Page 21: ... way valve 208 230V AC when is ON 5 HEAT2 CN15 connect to chassis heater 208 230V AC when is ON 6 AC FAN CN25 connect to AC fan 7 TP T4 T3 CN21 CN22 connect to pipe temp sensor T3 ambient temp sensor T4 exhaust temp sensor TP 8 PMV CN31 connect to Electric Expansion Valve 9 DC FAN CN7 connect to DC fan 10 TESTPORT CN6 used for testing 11 W CN28 connect to compressor V CN29 0V AC standby U CN30 10 ...

Page 22: ...Outdoor unit printed circuit board diagram 17122000023675 ...

Page 23: ...connect to chassis heater 208 230V AC when is ON 7 PMV CN31 connect to Electric Expansion Valve 8 TP T4 T3 CN21 CN22 connect to pipe temp sensor T3 ambient temp sensor T4 exhaust temp sensor TP 9 DC FAN CN7 connect to DC fan 10 FAN_IPM IPM 501 IPM for DC fan 11 TESTPORT CN6 used for testing 12 EE_PORT CN505 EEPROM programer port 13 MCUPORT CN507 connect to PC communication 14 W CN28 connect to com...

Page 24: ...Outdoor unit printed circuit board diagram 17122000036588 ...

Page 25: ...hassis heater 208 230V AC when is ON 7 CN38 CN38 connect to PC communication 8 PMV CN18 connect to Electric Expansion Valve 9 DC FAN CN414 connect to DC fan 10 FAN_IPM IPM 501 IPM for DC fan 11 CN19 CN19 Internal drive motor 12 TESTPORT CN23 used for testing 13 CN9 CN9 connect to PC communication 14 U CN28 connect to compressor V CN29 0V AC standby W CN30 10 200V AC running 15 COMP_IPM IPM 301 IPM...

Page 26: ...54 R152 R150 R149 R148 R147 R125 R121 R120 R115 R114 R110 R105 R104 R103 R102 C612 C133 C129 C128 C124 C123 C121 C120 C118 C116 C111 C101 IC105 Q601 C303 R695 C309 R603 CN50 C5 CN1A R26 R24 R22 CN15 C134 R15 R16 R630 R627 R200 D605 C617 R9 R8 R7 R5 R3 CN21 CN22 ZR4 R626 R612 R608 R605 R604 R602 R601 R323 R315 R301 R190 R189 R188 R179 R178 R176 R172 R171 R170 R169 R168 R165 R156 R143 R142 R140 R138...

Page 27: ...CN15 connect to chassis heater 208 230V AC when is ON 5 AC FAN CN25 connect to AC fan 6 PMV CN31 connect to Electric Expansion Valve 7 TESTPORT CN6 used for testing 8 TP T4 T3 CN21 CN22 connect to pipe temp sensor T3 ambient temp sensor T4 exhaust temp sensor TP 9 DC FAN CN7 connect to DC fan 10 FAN_IPM IPM 501 IPM for DC fan 11 W CN28 connect to compressor V CN29 0V AC standby U CN30 10 200V AC r...

Page 28: ... 5 Auto mode 5 3 6 Drying Mode 5 3 7 Forced Operation Function 6 3 8 Timer Function 6 3 9 Sleep Function 6 3 10 Auto Restart Function 6 3 11 Louver Position Memory Function 6 3 12 ECO Function 6 3 13 Self Clean Optional 6 3 14 Follow Me Optional 6 3 15 Slience Optional 6 3 16 Super Cool 6 3 17 Electrical energy consumption control function 6 Product Features ...

Page 29: ...Turbo or Silent 3s Cancellation of Timer OFF Fresh Swing Turbo or Silent 3s Defrost Warming in heating mode Self clean available on select units only Heating in room temperature under 8 C WiFi control available on select units only ECO function available on select units only set temperature gradually illuminates to in one second intervals Note Please select the display function according to your p...

Page 30: ...ule has an automatic shutoff mechanism based on the unit s current voltage and temperature If automatic shutoff is initiated the corresponding error code is displayed on the indoor unit and the unit ceases operation Indoor fan delayed operation When the unit starts the louver is automatically activated and the indoor fan will operate after a period of setting time or the louver is in place If the ...

Page 31: ...uns continuously for more than 120 minutes If the following conditions are satisfied the compressor ceases operation When calculated frequency fb is less than minimum limit frequency FminC When protective time is more than or equal to ten minutes When T1 is lower than or equal to Tsc CDIFTEMP Note CDIFTEMP is EEPROM setting parameter It is 2 C usually 3 If one of the following conditions is satisf...

Page 32: ...peed reduces to 80 When T1 Tsc is higher than 0 C fan speed reduces to 60 When T1 Tsc is higher than 0 5 C fan speed reduces to 40 When T1 Tsc is higher than 1 C fan speed reduces to 20 Descent curve When T1 Tsc is lower than or equal to 0 5 C fan speed increases to 20 When T1 Tsc is lower than or equal to 0 C fan speed increases to 60 When T1 Tsc is lower than or equal to 1 5 C fan speed increase...

Page 33: ...ch off Timer on Timer off Changes in mode fan speed setting temperature 3 8 Timer function Timing range is 24 hours Timer on The machine will turn on automatically when reaching the setting time Timer off The machine will turn off automatically when reaching the setting time Timer on off The machine will turn on automatically when reaching the setting on time and then turn off automatically when r...

Page 34: ...y one temperature sensor in malfunction the AC will quit ECO mode Indoor fan will run at auto fan when enter into the ECO mode The setting temp and setting fan speed can be changed through remote controller signal 3 13 Self clean Optional The indoor unit will run at low fan for 16 minutes then turn off if you press Self Clean when the unit is in cooling or drying mode Self Clean keeps the indoor u...

Page 35: ...Contents 1 First Time Installation Check 2 2 Refrigerant Recharge 4 3 Re Installation 5 3 1 Indoor Unit 5 3 2 Outdoor Unit 7 Maintenance ...

Page 36: ...ture from affecting the air conditioner s performance the indoor unit as well as the pipes between the indoor and outdoor unit must be be leak tested and evacuated Leak test soap water method Use a soft brush to apply soapy water or a neutral liquid detergent onto the indoor unit connections and outdoor unit connections If there is gas leakage bubbles will form on the connection Air purging with v...

Page 37: ...ng for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi after 50 minutes check for leakage If the pressure successfully reaches 0 1 MPa 14 5 Psi fully close the Handle Lo valve then cease vacuum pump operations b Wait for 5 minutes then check whether the gauge needle moves after turning off the vacuum pump If the gauge needle moves backward check wether there is gas leaka...

Page 38: ...r in the charge hose then fully tighten the charge hose with push pin Handle Lo to the service port of 3 way valve 6 Place the charging cylinder onto an electronic scale and record the starting weight 7 Fully open the Handle Lo manifold valve 2 and 3 way valves 8 Operate the air conditioner in cooling mode to charge the system with liquid refrigerant 9 When the electronic scale displays the correc...

Page 39: ... s gas service port 3 Open the Handle Lo manifold valve to purge air from the charge hose for 5 seconds and then close it quickly 4 Close the 2 way valve 5 Operate the air conditioner in cooling mode Cease operations when the gauge reaches 0 1 MPa 14 5 Psi 6 Close the 3 way valve so that the gauge rests between 0 3 MPa 43 5 Psi and 0 5 MPa 72 5 Psi 7 Disconnect the charge set and mount the caps of...

Page 40: ...dicates 0 1 MPa 14 5 Psi If the meter does not indicate 0 1 MPa 14 5 Psi after 30 minutes continue evacuating for an additional 20 minutes If the pressure does not achieve 0 1 MPa 14 5 Psi after 50 minutes check for leakage If the pressure successfully reaches 0 1 MPa 14 5 Psi fully close the Handle Lo valve then cease vacuum pump operations b Wait for 5 minutes then check whether the gauge needle...

Page 41: ...stem for approximately one hour Confirm that the compound meter indicates 0 1 MPa 14 5Psi 4 Close the valve Low side on the charge set and turn off the vacuum pump 5 Wait for 5 minutes then check whether the gauge needle moves after turning off the vacuum pump If the gauge needle moves backward check whether there is gas leakage 6 Disconnect the charge hose from the vacuum pump 7 Mount the caps of...

Page 42: ...der to ensure a complete liquid charge 5 Open the valve at the bottom of the cylinder for 5 seconds to purge the air in the charge hose then fully tighten the charge hose with push pin Handle Lo to the service port of 3 way valve 6 Place the charging cylinder onto an electronic scale and record the starting weight 7 Fully open the Handle Lo manifold valve 2 and 3 way valves 8 Operate the air condi...

Page 43: ...Contents 1 Dimension 2 2 Indoor Unit Disassembly 3 2 1 Front Panel 3 2 2 Electrical parts 8 2 3 Evaporator 12 2 4 Fan motor and fan 14 2 5 Step motor 16 Indoor Unit Disassembly ...

Page 44: ... Indoor Unit Disassembly 2 1 Dimension Model W mm D mm H mm 9K 805 205 285 12K 805 205 285 18K 958 223 302 24K 1120 405 330 ...

Page 45: ...n 1 Hold the front panel by the tabs on the both sides and lift it see CJ_ MA_001 2 Push up the bottom of an air filter and then pull it out downwards see CJ_MA_002 CJ_MA_001 CJ_MA_002 Note This section is for reference only Actual unit appearance may vary Front Panel Tab Filter ...

Page 46: ...h the hook towards left to open it see CJ_MA_003 4 Bend the horizontal louver lightly by both hands to loosen the hooks then remove the horizontal louver see CJ_MA_004 CJ_MA_003 CJ_MA_004 Note This section is for reference only Actual unit appearance may vary Hook Horizontal Louver Hook ...

Page 47: ...move the electrical cover see CJ_MA_005 6 Disconnect the connector for display board see CJ_MA_006 7 Remove 1 screw and overturn the display panel to remove the display board see CJ_MA_006 CJ_MA_005 CJ_MA_006 Note This section is for reference only Actual unit appearance may vary ...

Page 48: ... 8 Slide the front panel side to side to release each axis see CJ_MA_007 9 Open the screw caps 2 and the remove the screws see CJ_MA_008 10 Release the 2 hooks CJ_MA_007 CJ_MA_008 Note This section is for reference only Actual unit appearance may vary ...

Page 49: ...ooks in the back see CJ_MA_009 12 Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger see CJ_MA_010 CJ_MA_009 CJ_MA_010 Note This section is for reference only Actual unit appearance may vary Hooks Panel Frame ...

Page 50: ...then remove the cover of electronic box and the terminal cover see CJ_MA_011 2 Pull out the room temperature sensor T1 and the coil temperature sensor T2 see CJ_MA_012 3 Remove the two screws used for the ground connection see CJ_MA_012 CJ_MA_011 CJ_MA_012 Note This section is for reference only Actual unit appearance may vary T1 Sensor Ground Screws T2 Sensor Fixing Screw Electronic Cover ...

Page 51: ...in right image to remove it CJ_MA_013 2 6 Disconnect the wires Then remove the electronic main board CJ_MA_014 CJ_MA_013 2 CJ_MA_014 Note This section is for reference only Actual unit appearance may vary Fixing Screw Electronic Box Indoor Fan Motor Applicable to AC Motor Only Swing Motor Display Board Pipe Temperature Sensor Room Temperature Sensor CJ_MA_013 1 ...

Page 52: ...ssembly 10 Procedure Illustration 7 Remove the fixing screw then remove the capacitor of fan motor see CJ_ MA_015 CJ_MA_015 Note This section is for reference only Actual unit appearance may vary Capacitor of Fan Motor ...

Page 53: ...tration 1 Disassemble the pipe holder located at the rear of the unit see CJ_MA_016 2 Remove the screws on the evaporator located at the fixed plate see CJ_ MA_017 3 Remove the two screws on the evaporator located at the base of the bearing side see CJ_MA_018 CJ_MA_016 CJ_MA_017 CJ_MA_018 Note This section is for reference only Actual unit appearance may vary Pipe Holder Screws Screws ...

Page 54: ... Indoor Unit Disassembly 12 Procedure Illustration 4 Pull out the evaporator see CJ_MA_019 CJ_MA_019 Note This section is for reference only Actual unit appearance may vary Evaporator ...

Page 55: ...ng fan motor and fan Procedure Illustration 1 Remove the two screws and remove the fixing board of the fan motor see CJ_ MA_020 2 Remove the Bearing sleeve see CJ_ MA_021 3 Remove the fixing screw see CJ_MA_022 4 Pull out the fan motor and fan assembly from the side CJ_MA_020 CJ_MA_021 CJ_MA_022 Note This section is for reference only Actual unit appearance may vary Fixing Screw Screws ...

Page 56: ...lectrical parts refer to 1 Front panel 2 Electrical parts before disassembling step motor Procedure Illustration 1 Remove the two screws then remove the stepping motor see CJ_MA_023 CJ_MA_023 Note This section is for reference only Actual unit appearance may vary Stepping Motor ...

Page 57: ...nit Table 2 2 Dimension 3 3 Outdoor Unit Disassembly 14 3 1 Panel Plate 14 3 2 Electrical Parts 33 3 3 Fan Assembly 45 3 4 Fan Motor 46 3 5 Sound blanket 47 3 6 Four way valve 48 3 7 Compressor 49 Outdoor Unit Disassembly ...

Page 58: ... Table Outdoor Unit Model Panel Plate PCB Board MOAB30 09HFN8 QRD0GW AB30 PCB Board 4 MOX133 09HFN8 QRD0GW X130 PCB Board 9 MOAB30 12HFN8 QRD0GW AB30 PCB Board 4 MOX133 12HFN8 QRD0GW X130 PCB Board 9 MOB32 18HFN8 QRD0GW B30 PCB Board 4 MOCA32 24HFN8 QRD0GW B30 PCB Board 5 ...

Page 59: ... Outdoor Unit Disassembly 3 2 Dimension 1 Panel Plate AA01 ...

Page 60: ... Outdoor Unit Disassembly 4 2 Panel Plate AB01 ...

Page 61: ... Outdoor Unit Disassembly 5 3 Panel Plate BA01 ...

Page 62: ... Outdoor Unit Disassembly 6 For US models ...

Page 63: ... Outdoor Unit Disassembly 7 4 Panel Plate B01 ...

Page 64: ... Outdoor Unit Disassembly 8 For US models ...

Page 65: ... Outdoor Unit Disassembly 9 5 Panel Plate CA01 ...

Page 66: ... Outdoor Unit Disassembly 10 For US models ...

Page 67: ... Outdoor Unit Disassembly 11 6 Panel Plate D01 ...

Page 68: ... Outdoor Unit Disassembly 12 For US models ...

Page 69: ... Outdoor Unit Disassembly 13 7 Panel Plate X101 ...

Page 70: ...r 2 Remove the screws of the big handle and then remove the big handle 1 screws see CJ_AA01_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ AA01_002 CJ_AA01_001 CJ_AA01_002 Note This section is for reference only Actual unit appearance may vary Big Handle Top Cover ...

Page 71: ... the front panel and then remove the front panel 6 screws see CJ_AA01_003 5 Remove the screws of water collecting cover 2 screws see CJ_AA01_004 CJ_AA01_003 CJ_AA01_004 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 72: ...r net and then remove the rear net 2 screws see CJ_AA01_005 for some models 7 Remove the screws of the right panel and then remove the right panel 6 screws see CJ_AA01_006 CJ_AA01_005 CJ_AA01_006 Note This section is for reference only Actual unit appearance may vary The Right Panel ...

Page 73: ...ws of the big handle and then remove the big handle 3 screws see CJ_BA01_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ BA01_002 CJ_BA01_001 CJ_BA01_002 Note This section is for reference only Actual unit appearance may vary Top Cover ...

Page 74: ...hen remove the front panel 7 screws see CJ_BA01_003 5 Remove the screws of water collecting cover and then remove the water collecting cover 2 screws see CJ_ BA01_004 CJ_BA01_003 CJ_BA01_004 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 75: ...ear net and then remove the rear net 2 screws see CJ_BA01_005 for some models 7 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_BA01_006 CJ_BA01_005 CJ_BA01_006 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 76: ...of the big handle and then remove the big handle 1 screw see CJ_B01_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ B01_002 CJ_B01_001 CJ_B01_002 Note This section is for reference only Actual unit appearance may vary Top Cover Big Handle ...

Page 77: ...5 Remove the screws of the front panel and then remove the front panel 7 screws see CJ_B01_004 6 Remove the screws of water collecting cover and then remove the water collecting cover 2 screws see CJ_ B01_005 CJ_B01_003 CJ_B01_004 CJ_B01_005 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 78: ... rear net and then remove the rear net 2 screws see CJ_B01_006 for some models 8 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_B01_007 CJ_B01_006 CJ_B01_007 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 79: ... the big handle and then remove the big handle 1 screw see CJ_CA01_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ CA01_002 CJ_CA01_001 CJ_CA01_002 Note This section is for reference only Actual unit appearance may vary Top Cover Big Handle ...

Page 80: ...hen remove the front panel 7 screws see CJ_CA01_003 5 Remove the screws of water collecting cover and then remove the water collecting cover 2 screws see CJ_ CA01_004 CJ_CA01_003 CJ_CA01_004 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 81: ...ear net and then remove the rear net 2 screws see CJ_CA01_005 for some models 7 Remove the screws of the right panel and then remove the right panel 7 screws see CJ_CA01_006 CJ_CA01_005 CJ_CA01_006 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 82: ...f the big handle and then remove the big handle 2 screws see CJ_D01_001 3 Remove the screws of the top cover and then remove the top cover 4 screws Two of the screws is located underneath the big handle see CJ_ D01_002 CJ_D01_001 CJ_D01_002 Note This section is for reference only Actual unit appearance may vary Big Handle Top Cover ...

Page 83: ...ht panel and then remove the front right panel 2 screws see CJ_D01_003 5 Remove the screws of the front panel and then remove the front panel 9 screws see CJ_D01_004 CJ_D01_003 CJ_D01_004 Note This section is for reference only Actual unit appearance may vary Front Panel Front Right Panel ...

Page 84: ...cover and then remove the water collecting cover 2 screw see CJ_ D01_005 7 Remove the screws of the rear net and then remove the rear net 2 screws see CJ_D01_006 for some models CJ_D01_005 CJ_D01_006 Note This section is for reference only Actual unit appearance may vary Water Collecting Cover ...

Page 85: ...embly 29 Procedure Illustration 8 Remove the screws of the right panel and then remove the right panel 8 screws see CJ_D01_007 CJ_D01_007 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 86: ...e screw of the big handle and then remove the big handle 1 screws see CJ_X101_001 3 Remove the screws of the top cover and then remove the top cover 3 screws One of the screws is located underneath the big handle see CJ_ X101_002 CJ_X101_001 CJ_X101_002 Note This section is for reference only Actual unit appearance may vary ...

Page 87: ...nd then remove the water collecting cover 2 screws see CJ_ X101_003 5 Remove the screws of the front panel and then remove the front panel 6 screws onoff models or 8 screws inverter models see CJ_ X101_004 CJ_X101_003 CJ_X101_004 Note This section is for reference only Actual unit appearance may vary ...

Page 88: ...isassembly 32 Procedure Illustration 6 Remove the screws of the right panel and then remove the right panel 5 screws see CJ_X101_005 CJ_X101_005 Note This section is for reference only Actual unit appearance may vary ...

Page 89: ... black wire connects with terminal 4 see CJ_ODU_ PCB_001 3 Disconnect the wires connected to the compressor Black wire connects with terminal 1 blue wire and red wire connect with the compressor capacitor see CJ_ODU_PCB_001 4 Disconnect the wires connected to 4 way valve Blue wires on terminal 2 3 see CJ_ODU_PCB_001 5 Remove the fixing screw of the compressor capacitor then pull it out see CJ_ODU_...

Page 90: ...with subzero refrigeration control board remove 3 screws of it showed in the figure 9 The subzero refrigeration control board is in the back of the medal sheet CJ_ODU_PCB_001 03 CJ_ODU_PCB_001 04 Note This section is for reference only Actual unit appearance may vary ...

Page 91: ...inal And the red wire is on the borad see CJ_ODU_PCB_002 1 3 Disconnect the wires connected to 4 way valve see CJ_ODU_PCB_002 1 4 Disconnect the wires connected to the transformer see CJ_ODU_ PCB_002 1 5 Disconnect the other wires connected to terminals see CJ_ODU_PCB_002 1 6 Remove the PCB board see CJ_ ODU_PCB_002 1 7 Remove the screws of the capacitors see CJ_ODU_PCB_002 2 CJ_ODU_PCB_002 1 CJ_O...

Page 92: ...cted to the compressor see CJ_ODU_ PCB_003 3 Disconnect the wires connected to Pipe temperature sensor see CJ_ ODU_PCB_003 4 Disconnect the earth wire see CJ_ ODU_PCB_003 5 Remove the PCB board see CJ_ODU_ PCB_003 CJ_ODU_PCB_003 Note This section is for reference only Actual unit appearance may vary Fan motor Compressor Pipe temperature sensor Earth wire ...

Page 93: ...he connector for the compressor see CJ_ODU_PCB_004 3 5 Pull out the two blue wires connected with the four way valve CJ_ODU_PCB_004 3 6 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor TP CJ_ ODU_PCB_004 3 7 Disconnect the electronic expansion valve wire CJ_ODU_PCB_004 3 8 Then remove the electronic control board CJ_ODU_PCB_004 1 CJ_...

Page 94: ... 4 Pull out the two blue wires connected with the four way valve see CJ_ODU_PCB_005 2 5 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor TP see CJ_ ODU_PCB_005 2 6 Disconnect the electronic expansion valve wire see Fig CJ_ODU_ PCB_005 2 7 Then remove the electronic control board CJ_ODU_PCB_005 1 CJ_ODU_PCB_005 2 Note This section is ...

Page 95: ..._ODU_PCB_006 2 4 Pull out the two blue wires connected with the four way valve see CJ_ODU_PCB_006 2 5 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor TP see CJ_ ODU_PCB_006 2 6 Disconnect the electronic expansion valve wire see Fig CJ_ODU_ PCB_006 2 7 Remove the connector for the DR and reactor see Fig CJ_ODU_ PCB_006 2 8 Then remov...

Page 96: ...nd then open the electronic control box cover 5 hooks see CJ_ODU_PCB_007 2 3 Disconnect the connector for fan motor from the IPM board see CJ_ ODU_PCB_007 3 4 Remove the connector for the compressor see CJ_ODU_PCB_007 3 CJ_ODU_PCB_007 1 CJ_ODU_PCB_007 2 CJ_ODU_PCB_007 3 Note This section is for reference only Actual unit appearance may vary Compressor ...

Page 97: ...mp sensor TP see CJ_ODU_PCB_007 4 7 Disconnect the electronic expansion valve wire see Fig CJ_ODU_PCB_007 4 8 Remove the connector for 4 way valve see Fig CJ_ODU_PCB_007 4 9 Remove the connector for the reactor see Fig CJ_ODU_PCB_007 4 10 Then remove the electronic control box see Fig CJ_ODU_PCB_007 4 CJ_ODU_PCB_007 4 Note This section is for reference only Actual unit appearance may vary 4 Way Va...

Page 98: ...cted with the four way valve see CJ_ODU_PCB_008 2 5 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor TP see CJ_ ODU_PCB_008 2 6 Disconnect the electronic expansion valve wire see Fig CJ_ODU_ PCB_008 2 7 Disconnect the communication wire indoor PCB see Fig CJ_ODU_ PCB_008 2 8 Disconnect the PFC inductor see Fig CJ_ODU_PCB_008 2 9 Then...

Page 99: ...see CJ_ODU_ PCB_009 1 2 Pull out the wires from electrical supporting plate and turn over the electronic control assembly see CJ_ODU_PCB_009 2 3 Remove the electronic installing box subassembly 4 hooks see CJ_ODU_ PCB_009 3 CJ_ODU_PCB_009 1 CJ_ODU_PCB_009 2 CJ_ODU_PCB_009 3 Note This section is for reference only Actual unit appearance may vary ...

Page 100: ... 4 5 Disconnect the connectors from the electronic control board see CJ_ODU_PCB_009 3 6 Then remove the electronic control board 4 hooks CJ_ODU_PCB_009 4 CJ_ODU_PCB_009 5 CJ_ODU_PCB_009 6 Note This section is for reference only Actual unit appearance may vary Compressor T3 T4 TP AC Fan DC Fan Power supply ...

Page 101: ...anel Plate before disassembling fan or remove air outlet grille before disassembling fan Procedure Illustration 1 Remove the nut securing the fan with a spanner see CJ_ODU_ FAN_001 2 Remove the fan CJ_ODU_FAN_001 Note This section is for reference only Actual unit appearance may vary D cut ...

Page 102: ...tor on PCB refer to 3 1 Panel Plate and 3 2 Electrical parts before disassembling fan motor Procedure Illustration 3 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_MOTOR_001 4 Remove the fan motor CJ_ODU_MOTOR_001 Note This section is for reference only Actual unit appearance may vary ...

Page 103: ...e refer to 3 1 Panel plate before disassembling sound blanket Procedure Illustration 1 Remove the sound blanket side and top see CJ_ODU_BLANKET_001 CJ_ODU_BLANKET_001 Note This section is for reference only Actual unit appearance may vary Sound Blanket side Sound Blanket top ...

Page 104: ... the two steps before heating up the brazed parts The operations above should be implemented by professionals Note Remove the panel plate connection of four way valve on PCB refer to 3 1 Panel plate and 3 2 Electrical parts before disassembling sound blanket Procedure Illustration 1 Heat up the brazed parts and then detach the the four way valve and the pipe see CJ_ODU_VALVE_001 2 Remove the four ...

Page 105: ...heating up the brazed parts The operations above should be implemented by professionals Note Remove the panel plate connection of compressor on PCB refer to 3 1 Panel plate and 3 2 Electrical parts before disassembling sound blanket Procedure Illustration 1 Remove the flange nut of terminal cover and remove the terminal cover see CJ_ ODU_COMP_001 2 Disconnect the connectors see CJ_ODU_ COMP_002 CJ...

Page 106: ...tom plate see CJ_ODU_COMP_003 4 Heat up the brazed parts and then remove the the discharge pipe and the suction pipe see CJ_ODU_COMP_004 5 Lift the compressor from the base pan assembly with pliers CJ_ODU_COMP_003 CJ_ODU_COMP_004 Note This section is for reference only Actual unit appearance may vary Discharge Pipe Suction Pipe ...

Page 107: ...agnosis and Solution TS02 Indoor and Outdoor Unit Communication Error Diagnosis and Solution TS03 Zero crossing Signal Detection Error Diagnosis and Solution TS04 Fan Speed is Operating Outside of The Normal Range Diagnosis and Solution TS05 Open Circuit or Short Circuit of Temperature Sensor Diagnosis and Solution TS06 Refrigerant Leakage Detection Diagnosis and Solution TS07 Indoor PCB Display B...

Page 108: ...e or High Pressure Protection Diagnosis and Solution TS12 Inverter Compressor Drive Error Diagnosis and Solution TS13 Low Pressure Protection Diagnosis and Solution TS14 Indoor units mode conflic Diagnosis and Solution TS33 Communication error between outdoor main chip and compressor driven chip Diagnosis and Solution for some manuals TS34 AP mode is actived but there is no WIFI kit installed Diag...

Page 109: ... gloves or wrist strap to avoid damage to the board WARNING Electricity remains in capacitors even when the power supply is off Ensure the capacitors are fully discharged before troubleshooting Test the voltage between P and N on back of the main PCB with multimeter If the voltage is lower than 36V the capacitors are fully discharged Note This picture is for reference only Actual appearance may va...

Page 110: ...F E5 Evaporator coil middle temperature sensor T2 is in open circuit or has short circuited TS05 IDU 7 times OFF EC Refrigerant leakage detection TS06 INV 9 times OFF E7 E EH 0 Indoor PCB Display board communication error TS07 1 times ON F0 Current overload protection TS08 S 2 times ON F1 Outdoor room temperature sensor T4 is in open circuit or has short circuited TS05 ODU 3 times ON F2 Condenser ...

Page 111: ...OFF EC 54 Compressor discharge temperature sensor TP is in open circuit or has short circuited TS05 ODU 5 times OFF EC 56 Evaporator coil outlet temperature sensor T2B is in open circuit or has short circuited for free match indoor units TS05 ODU 6 times OFF EH 60 Indoor room temperature sensor T1 is in open circuit or has short circuited TS05 IDU 6 times OFF EH 61 Evaporator coil middle temperatu...

Page 112: ...efined by the service manual Ensure that this code is not a temperature reading Troubleshooting Test the unit using the remote control If the unit does not respond to the remote the indoor PCB requires replacement If the unit responds the display board requires replacement 88 flash frequency ...

Page 113: ...r outlet C F Installation Condition Information Indoor temperature C F Indoor humidity RH Outdoor temperature C F Outdoor humidity RH Length of Connecting pipe Pipe diameter Gas pipe Liquid pipe Length of Wiring wire diameter System Running Pressure MPa or Bar or PSI Room size L W H Photo of Installation of Indoor unit Photo 1 Photo of Installation of Outdoor unit Photo 2 Failure Description Error...

Page 114: ...or coil temperature T4 Ambient temperature TP Discharge temperature FT Targeted Frequency Fr Actual Frequency dl Compressor current Uo Outdoor AC voltage Sn Indoor capacity test Reserve Pr Outdoor fan speed Lr EXV opening steps ir Indoor fan speed HU Indoor humidity TT Adjusted setting temperature Reserve Reserve oT GA algorithm frequency Approval from Manufacturer Approved More Proof needed Rejec...

Page 115: ...owing table shows information codes The screen displays this code for 1 2 seconds then the information for 25 seconds Displayed code Explanation Additional Notes Error code Refer to next list of error code T1 T1 T1 temperature T2 T2 T2 temperature T3 T3 T3 temperature T4 T4 T4 temperature TP TP TP temperature Targeted frequency FT Targeted Frequency Actual frequency fr Actual Frequency Compressor ...

Page 116: ...ed Eh 60 Indoor room temperature sensor T1 is in open circuit or has short circuited Eh 61 Evaporator coil temperature sensor T2 is in open circuit or has short circuited EC 07 The outdoor fan speed is operating outside of the normal range EH 0 Indoor PCB Display board communication error EL 0C Refrigerant leak detected PC 00 IPM malfunction or IGBT over strong current protection PC 10 Over low vo...

Page 117: ... PH 90 Evaporator coil temperature over high protection PH 91 Evaporator coil temperature over low Protection LC 05 Frequency limit caused by voltage LC 03 Frequency limit caused by current LC 02 Frequency limit caused by TP LC 01 Frequency limit caused by T3 LH 00 Frequency limit caused by T2 LC 06 Frequency limit caused by PFC LH 07 Frequency limit caused by remote controller nA no malfuction or...

Page 118: ... has short circuited E54 Compressor discharge temperature sensor TP is in open circuit or has short circuited E51 Outdoor unit EEPROM parameter error E7 The outdoor fan speed is operating outside of the normal range P0 IPM malfunction or IGBT over strong current protection P10 Over low voltage protection P11 Over voltage protection P12 DC voltage protection P2 Compressor top high temperature prote...

Page 119: ...ver high protection P91 Evaporator coil temperature over low Protection PF PFC module malfunction L5 Frequency limit caused by voltage L3 Frequency limit caused by current L2 Frequency limit caused by TP L1 Frequency limit caused by T3 L0 Frequency limit caused by T2 L6 Frequency limit caused by PFC nA No error and protection ...

Page 120: ...th customers before field maintenance No Problem Solution 1 Unit will not start 13 14 2 The power switch is on but fans will not start 13 14 3 The temperature on the display board cannot be set 13 14 4 Unit is on but the wind is not cold hot 13 14 5 Unit runs but shortly stops 13 14 6 The unit starts up and stops frequently 13 14 7 Unit runs continuously but insufficient cooling heating 13 14 8 Co...

Page 121: ...will not start 15 16 5 Condenser Outdoor fan will not start 15 16 6 Unit runs but shortly stops 15 16 7 Compressor short cycles due to overload 15 16 8 High discharge pressure 15 16 9 Low discharge pressure 15 16 10 High suction pressure 15 16 11 Low suction pressure 15 16 12 Unit runs continuously but insufficient cooling 15 16 13 Too cool 15 16 14 Compressor is noisy 15 16 15 Horizontal louver c...

Page 122: ... frequently Unit will not start The power switch is on but fans will not start The temperature on the display board cannot be set Unit is on but the wind is not cold hot Unit runs but shortly stops The unit starts up and stops frequently Unit runs continuously but insufficient cooling heating Cool can not change to heat Unit is noisy Test method remedy Test voltage Close the power switch Inspect c...

Page 123: ... switch is on but fans will not start The temperature on the display board cannot be set Unit is on but the wind is not cold hot Unit runs but shortly stops The unit starts up and stops frequently Unit runs continuously but insufficient cooling heating Cool can not change to heat Unit is noisy Test method remedy Check heat load Tighten bolts or screws Close all the windows and doors Remove the obs...

Page 124: ...tart but fans run Compressor and condenser outdoor fan will not start Evaporator indoor fan will not start Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due to overload High discharge pressure Low discharge pressure High suction pressure Low suction pressure Unit runs continuously but insufficient cooling Too cool Compressor is noisy Horizontal louver can...

Page 125: ... Condenser Outdoor fan will not start Unit runs but shortly stops Compressor short cycles due to overload High discharge pressure Low discharge pressure High suction pressure Low suction pressure Unit runs continuously but insufficient cooling Too cool Compressor is noisy Horizontal louver can not revolve Test method remedy Test voltage Inspect fuse type size Inspect connections tighten Test circu...

Page 126: ...x x x x x x x x x Reactor x x x x x x x x x Compressor x x x x x x x x x Additional refrigerant x x x x x x x x x Part requiring replacement F1 F2 F3 F4 F5 P0 P1 P2 P6 P4 EC 53 EC 52 EC 54 EC 51 EC 07 PC 00 PC 01 PC 02 PC 03 PC 04 Outdoor PCB Indoor fan motor x x x x x x x x x x Outdoor fan motor x x x x x x T3 Sensor x x x x x x x x x T4 Sensor x x x x x x x x x TP Sensor x x x x x x x x x Reacto...

Page 127: ...pair Shut off the power supply and turn it on 2 minutes later Is it still displaying the error code YES Replace the indoor main PCB The unit is operating normally NO Remarks EEPROM A read only memory whose contents can be erased and reprogrammed using a pulsed voltage The location of the EEPROM chip on the indoor PCB is shown in the following image Note This pictures are only for reference actual ...

Page 128: ...nd turn it on 2 minutes later Is it still displaying the error code YES Replace the outdoor main PCB The unit is operating normally NO Remarks EEPROM A read only memory whose contents can be erased and reprogrammed using a pulsed voltage The location of the EEPROM chip on the outdoor PCB is shown in the following image Note For certain models outdoor PCB could not be removed separately In this cas...

Page 129: ...main PCB such as 4 way valve heater AC fan one by one to check their resistance Is there any component short circuit Unplug electronic expansion valve Check if power LED is on No No Check the AC voltage of L N output to IPM board is it same as power input Check the DC 5V 12V from IPM board to main PCB are they normal Unplug all the high voltage components connected to main PCB such as 4 way valve ...

Page 130: ... positive values and negative values If the outdoor unit has malfunction the voltage has always been the positive value While if the indoor unit has malfunction the voltage has always been a certain value Use a multimeter to test the resistance of the reactor which does not connect with capacitor The normal value should be around zero ohm Otherwise the reactor must have malfunction Note The pictur...

Page 131: ...s abnormal Recommended parts to prepare Connection wires Indoor main PCB Troubleshooting and repair Check the connections and power supply Correct the connections Turn on the unit when the power supply is good NO Indoor main PCB is defective Replace indoor main PCB YES Is it normal Note Zero crossing detection error is only valid for the unit with AC fan motor for other models this error is invali...

Page 132: ...Fan motor Indoor main PCB Troubleshooting and repair YES Power off then restart the unit after 2 minutes Is it within normal parameters Replace the fan motor Does a problem remain The unit is operating normally NO Shut off the power supply Rotate the fan by hand YES Does it turn easily Find the cause of the problem and resolve it NO Check the wiring of fan motor YES Is it improperly wired Ensure p...

Page 133: ...showing in below table the PCB must has problems and need to be replaced DC motor voltage input and output voltage 220 240V 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 DC motor voltage input and output voltage 115V No Color Signal Voltage 1 Red Vs Vm 140V 190V 2 3 Black GND 0V 4 White Vcc 13 5 16 5V 5 Yellow Vsp 0 6...

Page 134: ...6 14 YKFG 28 4 3 7 YKFG 28 4 3 14 YKFG 28 4 6 5 Brand Welling Welling Welling Welling Black Red Main 444Ω 287Ω 231Ω 183 6Ω Blue Black AUX 470Ω 409Ω 414Ω 206Ω Model YKFG 45 4 13 YKFG 45 4 22 YKFG 45 4 22 13 YKFG 60 4 2 6 YKFG 60 4 1 Brand Dongfang Welling Welling Welling Black Red Main 125 2Ω 168Ω 96Ω 68Ω Blue Black AUX 83 8Ω 141Ω 96Ω 53Ω 2 Power on and set the unit running in fan mode at high fan ...

Page 135: ...restart the unit after 2 minutes Is it within normal parameters Replace the fan motor Does a problem remain The unit is operating normally NO Shut off the power supply Rotate the fan by hand YES Does it turn easily Find the cause of the problem and resolve it NO Check the wiring of fan motor YES Is it improperly wired Ensure proper connections Measure the voltage for the fan motor from the PCB YES...

Page 136: ... U V U W V W If the resistance is not equal to each other the fan motor must has problems and need to be replaced Otherwise go to step 2 2 Power on and when the unit is in standby measure the voltage of pin4 5 in feedback signal connector If the value is not 5V change the PCB Otherwise go to step 3 3 Rotate the fan by hand measure the voltage of pin1 5 pin 2 5 and pin 3 5 in feedback signal connec...

Page 137: ...commended parts to prepare Connection wires Sensors Indoor main PCB Troubleshooting and repair Check the connection between temperature sensor and PCB Replace the indoor main PCB Is it within acceptable parameters Is it properly wired Ensure proper connections NO Measure the resistance value of the sensor YES Replace the sensor NO YES Note This picture and the value are only for reference actual a...

Page 138: ...1 1 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 28 3459 44 111 4 3...

Page 139: ...ction between temperature sensor and PCB Replace the outdoor main PCB Is it within acceptable parameters Is it properly wired Ensure proper connections NO Measure the resistance value of the sensor YES Replace the sensor NO YES Note For certain models outdoor PCB could not be removed separately In this case the outdoor electric control box should be replaced as a whole For certain models outdoor u...

Page 140: ...1 1 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 28 3459 44 111 4 3...

Page 141: ...95 35 78 75 167 8 084 115 239 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246 2 174 0 32 180 9 40 104 29 15 80 176 6 859 120 248 2 117 1 34 171 9 41 106 28 81 178 6 641 121 250 2 061 2 36 163 3 42 108 26 9 82 180 6 43 122 252 2 007 3 37 155 2 43 1...

Page 142: ... happens 3 times the LED displays the failure code and the AC turns off Recommended parts to prepare T2 sensor Indoor PCB Additional refrigerant Troubleshooting and repair Power off then restart the unit 2 minutes later Are any leakages present Check System for blockages and clear blockages if present Does a problem remain Put your hands in front of the indoor air outlet YES Is there cool air blow...

Page 143: ... to prepare Communication wire Indoor PCB Display board Troubleshooting and repair Is it still displaying the error code The unit functions normally Check the wirings and connections Are all the connections good Replace the indoor main PCB Does the error still exist Replace the display board Power off then restart the unit 2 minutes later Ensure a proper connection YES NO NO YES ...

Page 144: ...ctor properly wired Reconnect the wiring Reconnect the wiring No Are the reactor and inductance functioning normally Are the reactor and inductance functioning normally Yes Replace reactor Replace reactor No Is the outdoor ambient temperature is higher than 50 Is the outdoor ambient temperature is higher than 50 No Stop the unit Stop the unit Yes Is the outdoor unit ventilation functioning properl...

Page 145: ...the IPM board or replace the outdoor PCB Replace the IPM board or replace the outdoor PCB NO Check the outdoor fan and the outdoor unit ventilation Check the outdoor fan and the outdoor unit ventilation YES Is it in working order Is it in working order Please refer to the solution of the fan speed is operating outside of the normal range malfunction Please refer to the solution of the fan speed is...

Page 146: ...ing 1 Turn off outdoor unit and disconnect power supply 2 Discharge electrolytic capacitors and ensure all energy storage unit has been discharged 3 Disassemble outdoor PCB or disassemble IPM board 4 Measure the resistance value between P and U V W N U V W and N Digital tester Resistance value Digital tester Resistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W ...

Page 147: ...he compressor and check the resistance between U V V W and U W and all 3 values should be equal If not the compressor is faulty and should be replaced Note The picture and the value are only for reference actual condition and specific value may vary ...

Page 148: ...the unit NO Check the connections and wires YES Are they in working order Ensure proper connections or replace the wires NO Power on and measure the voltage between P and N YES While the unit is in standby is the voltage between P and N is around DC 310V 340V or 380V When start up the unit is it in 220V 400V Replace the IPM board NO Check the reactor YES Is it in working order Replace outdoor PCB ...

Page 149: ...ctor System blockages Troubleshooting and repair 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 Yes Yes Turn off the power supply and turn it on 10 minutes later Check if the temperature of compressor Top Is more than 90 No Check if the refrigerant system is normal Repair the refrige...

Page 150: ...PM radiator Are they fixed tightly Replace the outdoor control PCB Tighten the screws and apply silicon grease NO YES Note For certain models outdoor PCB could not be removed separately In this case the outdoor electric control box should be replaced as a whole ...

Page 151: ...Is the problem resolved Replace outdoor main board Is the problem resolved No High pressure protection High pressure protection Is the outdoor fan running properly Is the outdoor fan running properly No Yes NO Connect high pressure switch and mian control board Connect high pressure switch and mian control board Replace high pressure protector Replace high pressure protector Stop the unit Stop the...

Page 152: ... wiring between the PCB and compressor Is it improperly wired Ensure proper connections or replace the wires and connectors YES Check the IPM NO Is it functioning properly Replace the IPM board or replace the outdoor PCB NO Check the outdoor fan and the outdoor unit ventilation YES Is it functioning properly Please refer to Fan Speed Malfunction NO Check the compressor resistance values YES Are th...

Page 153: ...d solution Description Outdoor pressure switch cut off the system because low pressure is lower than 0 13 MPa the LED displays the failure code Recommended parts to prepare Connection wires Outdoor PCB Low pressure protector Refrigerant Troubleshooting and repair ...

Page 154: ...ned Is the indoor fan running properly in cooling mode Is the indoor fan running properly in cooling mode No Yes Yes No Check whether the refrigerant system is functioning properly Check whether the refrigerant system is functioning properly When the lvel of refrigerant is not sufficient doe the system function properly after more refrigerant is added When the lvel of refrigerant is not sufficient...

Page 155: ...de 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 Suppose Indoor unit A working in heating mode and indoor unit B is set to cooling mode or fan mode then B will change to stand by and A will be no change Cooling mode Heating Mode Fan Off Cooling mode No Yes No No Heating Mode Yes No Yes No Fan No Yes No No Off No No No No Note No No m...

Page 156: ...box Troubleshooting and repair Replace the electric control box Replace the electric control box Trouble is solved Trouble is solved YES Shut off the power supply and turn it on 2 minutes later Shut off the power supply and turn it on 2 minutes later Is it still displaying the error code Is it still displaying the error code NO Replace outdoor main board Replace outdoor main board If the system ca...

Page 157: ... on 2 minutes later Shut off the power supply and turn it on 2 minutes later NO YES Check if WIFI kit is Inserted well Check if WIFI kit is Inserted well Reinsert WIFI kit well Reinsert WIFI kit well NO YES Shut off the power supply and turn it on 2 minutes later Shut off the power supply and turn it on 2 minutes later Is it still displaying the error code Is it still displaying the error code Rep...

Page 158: ... Unit Disassembly 2 Measure the resistance value of the sensor using a multi meter 3 Check corresponding temperature sensor resistance value table Refer to Chapter 8 Appendix Note The picture and the value are only for reference actual condition and specific value may vary 8 2 Compressor Check 1 Disconnect the compressor power cord from outdoor PCB Refer to Chapter 6 Outdoor Unit Disassembly 2 Mea...

Page 159: ...istance Value KSK89D53UEZ KSK103D33UEZ3 YJ KSM135D23UFZ KTF235D22UMT Blue Red 2 35Ω 2 13Ω 1 28Ω 0 75Ω Blue Black Red Black Note The picture and the value are only for reference actual condition and specific value may vary ...

Page 160: ...ply 2 Discharge electrolytic capacitors and ensure all energy storage unit has been discharged 3 Disassemble outdoor PCB or disassemble IPM board 4 Measure the resistance value between P and U V W N U V W and N Digital tester Resistance value Digital tester Resistance value Red Black Several MΩ Red Black Several MΩ P N U N U V V W W Note The picture and the value are only for reference actual cond...

Page 161: ...Contents i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K 2 ii Temperature Sensor Resistance Value Table for TP for some units C K 3 iii Pressure On Service Port 4 Appendix ...

Page 162: ... 1 29078 117 243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 3269 41 106 4 96392 81 178 1 13604 121 250 0 35042 2 36 31 5635 42 108 4 76253 82 180 1 09958 122 252 0 3413 3 37 29 9058 43 109 4 5705 83 181 1 06448 123 253 0 33246 4 39 28 3459 44 111 4 38...

Page 163: ...5 35 78 75 167 8 084 115 239 2 422 4 25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246 2 174 0 32 180 9 40 104 29 15 80 176 6 859 120 248 2 117 1 34 171 9 41 106 28 81 178 6 641 121 250 2 061 2 36 163 3 42 108 26 9 82 180 6 43 122 252 2 007 3 37 155 2 43 10...

Page 164: ... 10 3 9 5 10 0 10 6 12 4 13 0 PSI 70 59 21 11 15 93 94 106 116 119 113 117 125 147 154 75 63 23 89 17 22 97 99 115 125 124 120 126 132 155 162 80 67 26 67 19 44 103 104 123 138 135 129 132 140 162 173 90 73 32 22 22 78 112 113 139 152 149 138 145 154 180 189 MPa 70 59 21 11 15 0 64 0 65 0 73 0 8 0 82 0 78 0 81 0 86 1 01 1 06 75 63 23 89 17 22 0 67 0 68 0 79 0 86 0 86 0 83 0 87 0 91 1 07 1 12 80 67...

Page 165: ... 20 8 18 5 16 5 65 18 33 32 5 30 0 26 6 25 4 23 3 20 5 19 0 75 23 89 33 8 31 5 27 8 26 3 24 9 21 5 20 0 PSI 55 12 78 439 413 367 330 302 268 239 65 18 33 471 435 386 368 339 297 276 75 23 89 489 457 403 381 362 312 290 MPa 55 12 78 3 03 2 85 2 53 2 28 2 08 1 85 1 65 65 18 33 3 25 3 00 2 66 2 54 2 33 2 05 1 90 75 23 89 3 38 3 15 2 78 2 63 2 49 2 15 2 00 0 0 5 1 1 5 2 2 5 3 3 5 4 55 65 75 ...

Page 166: ... 6 3 6 6 7 8 8 1 PSI 70 59 21 11 15 58 59 67 73 74 71 74 78 91 96 75 63 23 89 17 22 61 62 71 78 78 75 78 83 97 102 80 67 26 67 19 44 64 65 77 86 84 81 83 87 102 107 90 73 32 22 22 78 70 71 87 96 93 86 91 96 113 117 MPa 70 59 21 11 15 0 40 0 41 0 46 0 50 0 51 0 49 0 51 0 54 0 63 0 66 75 63 23 89 17 22 0 42 0 43 0 49 0 54 0 54 0 52 0 54 0 57 0 67 0 70 80 67 26 67 19 44 0 44 0 45 0 53 0 59 0 58 0 56 ...

Page 167: ... 3 13 0 11 6 10 3 65 18 33 20 3 18 8 16 6 15 9 14 6 12 8 11 9 75 23 89 21 1 19 7 17 3 16 4 15 6 13 4 12 5 PSI 55 12 78 274 258 229 207 189 168 149 65 18 33 294 273 241 231 212 186 172 6 75 23 89 306 286 251 238 226 194 181 MPa 55 12 78 1 89 1 78 1 58 1 43 1 30 1 16 1 03 65 18 33 2 03 1 88 1 66 1 59 1 46 1 28 1 19 75 23 89 2 11 1 97 1 73 1 64 1 56 1 34 1 25 0 0 5 1 1 5 2 2 5 55 65 75 ...

Page 168: ...8 12 6 13 3 PSI 70 59 21 11 15 95 96 108 118 121 115 119 128 150 157 75 63 23 89 17 22 99 101 117 128 126 122 129 135 158 165 80 67 26 67 19 44 105 106 125 141 138 132 135 143 165 176 90 73 32 22 22 78 114 115 142 155 152 141 148 157 184 193 MPa 70 59 21 11 15 0 65 0 66 0 74 0 82 0 84 0 80 0 83 0 88 1 03 1 08 75 63 23 89 17 22 0 68 0 69 0 81 0 88 0 88 0 85 0 89 0 93 1 09 1 14 80 67 26 67 19 44 0 7...

Page 169: ...21 2 18 9 16 8 65 18 33 33 2 30 6 27 1 25 9 23 8 20 9 19 4 75 23 89 34 5 32 1 28 4 26 8 25 4 21 9 20 4 PSI 55 12 78 448 421 374 337 308 273 244 65 18 33 480 444 394 375 346 303 282 75 23 89 499 466 411 389 369 318 296 MPa 55 12 78 3 09 2 91 2 58 2 33 2 12 1 89 1 68 65 18 33 3 32 3 06 2 71 2 59 2 38 2 09 1 94 75 23 89 3 45 3 21 2 84 2 68 2 54 2 19 2 04 0 0 5 1 1 5 2 2 5 3 3 5 4 55 65 75 ...

Page 170: ...1 656 2200 22 319 55 512 131 922 750 7 5 108 75 13 249 55 848 2250 22 5 326 25 56 527 133 749 800 8 116 15 465 59 837 2300 23 333 5 57 526 135 547 850 8 5 123 25 17 58 63 644 2350 23 5 340 75 58 508 137 314 900 9 130 5 19 604 67 287 2400 24 348 59 475 139 055 950 9 5 137 75 21 547 70 785 2450 24 5 355 25 60 427 140 769 1000 10 145 23 415 74 147 2500 25 362 5 61 364 142 455 1050 10 5 152 25 25 216 ...

Page 171: ...0 11 159 5 10 471 50 848 3350 33 5 485 75 53 935 129 083 1150 11 5 166 75 11 988 53 578 3400 34 493 54 593 130 267 1200 12 174 13 457 56 223 3450 34 5 500 25 55 243 131 437 1250 12 5 181 25 14 879 58 782 3500 35 507 5 55 885 132 593 1300 13 188 5 16 26 61 268 3550 35 5 514 75 56 52 133 736 1350 13 5 195 75 17 602 63 684 3600 36 522 57 148 134 866 1400 14 203 18 906 66 031 3650 36 5 529 25 57 769 1...

Page 172: ...11 850 8 5 123 25 1 393 34 507 2600 26 377 41 977 107 559 900 9 130 5 3 209 37 777 2650 26 5 384 25 42 769 108 984 950 9 5 137 75 4 951 40 911 2700 27 391 5 43 55 110 39 1000 10 145 6 624 43 923 2750 27 5 398 75 44 32 111 776 1050 10 5 152 25 8 235 46 823 2800 28 406 45 079 113 142 1100 11 159 5 9 790 49 621 2850 28 5 413 25 45 828 114 490 1150 11 5 166 75 11 291 52 324 2900 29 420 5 46 567 115 82...

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