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Tr

oubleshooting

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Page 81

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2. General Troubleshooting

2.1 Error Display (Indoor Unit)

When the indoor unit encounters a recognized error, the indicator light will flash in a corresponding series, the timer
display may turn on or begin flashing, and an error code will be displayed. These error codes are described in the
following table:

For Ceiling&floor type:

Operation

lamp

Timer

lamp

Defrosting

lamp

Alarm

lamp

Display

Error

Information

Solution

OFF

flflFlash

OFF

OFF

E2

Indoor room temperature sensor T1 is in open
circuit or has short circuited

Page 96

Flash

OFF

OFF

OFF

E3

Evaporator coil temperature sensor T2 is in open
circuit or has short circuited

Page 96

OFF

OFF

Flash

OFF

E4

Condenser coil temperature sensor T3 is in
open circuit or has short circuited (except for
18k/24k/36k cooling-only models)

Page 96

Flash

Flash

OFF

OFF

E7

Indoor unit EEPROM parameter error

Page 97

Flash

off

off

Flash

EC

Refrigerant leak detected

Page 99

OFF

OFF

OFF

Flash

E8

Water level alarm malfunction

Page 98

For A6 Duct type:

Operation

lamp

flashes

Timer lamp

Display

Error

Information

Solution

1 time

OFF

E0

Indoor unit EEPROM parameter error

Page 97

5 times

OFF

E4

Indoor room temperature sensor T1 is in open circuit or has
short circuited

Page 96

6 times

OFF

E5

Evaporator coil temperature sensor T2 is in open circuit or
has short circuited

Page 96

7 times

OFF

EC

Refrigerant leak detected

Page 99

8 times

OFF

EE

Water level alarm malfunction

Page 98

3 times

ON

F2

Condenser coil temperature sensor T3 is in open circuit or has
short circuited (except for 18k/24k/36k cooling-only models)

Page 96

11 times

ON

FA

Dual chips communication malfunction

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Summary of Contents for YEFE BZSM-MOW1 Series

Page 1: ... Aug 30 2019 LA Fixed_speed side_discharge Form MYFETM MOW1 190830 PAC Fixed_speed R410a 60Hz Cooling only SERIES YEFE 18 60 BZTM MOW1 YEFE 36 60 BZSM MOW1 YFFE 18 60 BZTM MOR1 YFFE 36 60 BZSM MOR1 YKFE 18 60 BZTM MOR1 YKFE 36 60 BZSM MOR1 ...

Page 2: ......

Page 3: ...s 3 Product Features 20 1 Operation Modes and Functions 4 Maintenance and Disassembly 25 1 Maintenance 2 Disassembly 5 Troubleshooting 82 1 Safety Caution 2 General Troubleshooting 3 Error Diagnosis and Troubleshooting Without Error Code 4 Quick Maintenance by Error Code 5 Troubleshooting by Error Code Appendix 106 i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K ii Pressure On ...

Page 4: ......

Page 5: ...Contents 1 In Case of Accidents or Emergency 2 2 Pre Installation 2 3 Operation and Maintenance 2 Safety Precautions ...

Page 6: ...m electri cal work For more information contact your dealer seller or an authorized Midea 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 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 brea...

Page 7: ...Contents 1 Model Reference 4 2 Electrical Wiring Diagrams 6 2 1 Indoor Unit 6 2 2 Outdoor Unit 12 Specifications ...

Page 8: ...1ɸ 220 230V 60Hz YKFE24BXTM M R1 YEFE24BXTM M W1 YUFE36BYTM MO X YFFE36BXTM M R1 36k 1ɸ 220 230V 60Hz YKFE36BXTM M R1 YEFE36BXTM M W1 YUFE36BYSM MO 1 YFFE36BXTM M R1 36k 3ɸ 220V 60Hz YKFE36BXTM M R1 YEFE36BXTM M W1 YUFE48BYTM MS 1 YFFE48BXTM M R1 48k 1ɸ 220 230V 60Hz YKFE48BXTM M R1 YEFE48BXTM M W1 YUFE48BYSM MS 1 YFFE48BXTM M R1 48k 3ɸ 220V 60Hz YKFE48BXTM M R1 YEFE48BXTM M W1 YUFE60BYTM MS 1 YFF...

Page 9: ...ndoor Fan K3 Water Level Switch M Swing Motor PUMP PUMP L LIVE N NEUTRAL TO CCM Comm Bus Central Controller RT1 T1 Indoor Room Temperature RT2 T2 Coil Temperature of Indoor Heat Exchanger P1 Super High Speed P2 High Speed T3 T4 T5 Transformer GM1 GM3 Horizontal Swing Motor GM2 Vertical Swing Motor AC FAN Alternating Current Fan DC FAN Director Current Fan ...

Page 10: ... 4 PUMP K3 W P SEN SO R K3 N O TE The w i r i ng di agr am i s f or expl anat i on pur pose onl y The act ual shape of t he com ponent s m ay be di f f er ent P2 O R AN G E 16022700000005 YKFE18BXTM M R1 YKFE24BXTM M R1 YKFE36BXTM M R1 YKFE48BXTM M R1 To CCM Comm Bus X Y E N E W F A N 1 0 J R 6 J R 6 1 6 0 2 2 5 0 0 0 0 2 7 8 4 ...

Page 11: ...PLAY BOARD WIRE CONTROLLER 10 CN10 5 MAGNETIC RING CN13 M PUMP 2 CN40 WIRE CONTROLLER 4 MAGNETIC RING COOLING HEATING COOLING ONLY COOLING HEATING COOLING ONLY YEFE36BXTM M W1 YEFE36BXTM M W1 INDOOR UNIT MAINBOARD CN33 ALARM Alarm Output T2 T1 CN6 4 BLACK WHITE INDOOR COIL TEMP SENSOR ROOM TEMP SENSOR CN5 CN23 ON OFF Remote Control M CN43 FAN FOR THE FRESH AIR OR ANION GENERATOR CN9 X Y E To CCM C...

Page 12: ...60BXTM M R1 YKFE60BXTM M R1 NOTE FOR FAN OPERATES IN SUPER HIGH SPEED PLEASE SWITCH HIGH SPEED TO SUPER HIGH SPEED SEE FAN WIRING PART FOR DETAIL INFORMATION P1 SU PER H I G H SPEED P2 H I G H SPEED T3 TRANSFORMER 16022500000850 ...

Page 13: ... C1 N1 3 core cable For 1phase For 3phase 5 core cable 5 2 5mm for 12K 60K 2 2 OUTDOOR POWER 208 240V OUTDOOR POWER 380V 3N 2 2 2 OUTDOOR POWER 220V 3N 2 2 V1 F1 L N For Cooling only 2 core cable 2 1 0mm 2 2 N O TE The w i r i ng di agr am i s f or expl anat i on pur pose onl y The act ual shape of t he com ponent s m ay be di f f er ent ...

Page 14: ...mpressor L PRO K2 Low Pressure Switch Shorting Stub K1 High Pressure Switch Shorting Stub TRANS Power Transformer T4 10KΩ RESISTANCE Outdoor Ambient Temperature T3 10KΩ RESISTANCE Coil Temperature of Condenser XT1 2 Way Terminal 4 Way Terminal XT2 3 Way Terminal XT4 Terminal K3 Compressor Discharge Temperature Shorting Stub R1 Resistance XP1 XP5 XS1 XS5 Connectors ...

Page 15: ...Specifications Page 11 YUFE18BYTM MO X YUFE24BYTM MO X Y G POWER SUPPLY 24V L N C 1 N 1 TO INDOOR UNIT ...

Page 16: ...NOTE This symbol indicates the element is optional the actual shape shall prevail RED Y G FAN BROW N BLUE BLUE XP1 XS1 16022000025969 YUFE36BYSM MO 1 KM 8 4 3 5 6 2 1 A1 22 21 A2 C O M P U V W Y G RED BLUE W HI TE XT4 SW 1 C T2 TR AN S C N 203 C N 208 BLACK RED C N 38 C N 39 C N 40 RED C N 200 C N 201 C N 9 P C B C N 206 LN ABCN BLUE W HI TE W HI TE BLUE BLACK BLUE W HI TE BLACK XS1 BLACK XP1 XP2X...

Page 17: ...Specifications Page 13 YUFE48BYTM MS 1 C 1 N1 24V 16022500001328 YUFE48BYSM MS 1 24V 202075790237 L PRO LOW PRESSURE SWITCH SHORTING STUB T4 10K RESISTANCE ROOM TEMP SENSOR XT1 16022700001387 ...

Page 18: ...Specifications Page 14 YUFE60BYTM MS 1 R S C YUFE60BYSM MS 1 R ...

Page 19: ...checked Note The system will not check if the protection could be cleared in 30 seconds after the protection occurs If this protection occurs 3 times it won t recover automatically until the main power is cut off Over current Protection When compressor is running if the current is over twice of the rated for 3 seconds the compressor will stop and an error code will be displayed on the outdoor PCB ...

Page 20: ...splay Function 21 1 4 Fan Mode 22 1 5 Cooling Mode 22 1 6 Auto mode 22 1 7 Drying Mode 22 1 8 Timer Function 22 1 9 Sleep Function 22 1 10 Auto Restart Function 23 1 11 Refrigerant Leakage Detection 23 1 12 Follow Me Optional 23 1 13 Drain Pump Control For Duct and Cassette 24 Product Features ...

Page 21: ...single fan speed The outdoor fan runs following the compressor except when AC is in evaporator high temperature protection in heating mode condenser high temperature protection in cooling mode defrosting mode and the current protection 1 5 4 Evaporator Temperature Protection When evaporator temperature drops below a configured value for some time the compressor and outdoor fan cease operations 1 6...

Page 22: ...urns off automatically at the preset Off Time Timer Off On The machine turns on automatically at the preset Off Time and then turns off automatically at the preset On Time The timer does not change the unit operation mode If the unit is off now it does not start up immediately after the timer off function is set When the setting time is reached the timer LED switches off and the unit running mode ...

Page 23: ...he pump stops and the LED displays an alarm again after 3 minutes 1 14 Drain Pump Control For Duct and Cassette Use the water level switch to control drain pump The system checks the water level every 5 seconds When the A C operates in cooling including auto cooling or forced cooling mode the pump begins running immediately and continuously until cooling stops If the water level increases up to th...

Page 24: ...Product Features Page 20 ...

Page 25: ...nce 26 1 1 First Time Installation Check 26 1 2 Refrigerant Recharge 28 1 3 Re Installation 29 1 3 1 Indoor Unit 29 1 3 2 Outdoor Unit 31 2 Disassembly 33 2 1 Indoor Unit 33 2 2 Outdoor Unit 60 Maintenance and Disassembly ...

Page 26: ...ose to the vacuum pump 4 Fully open the Handle Lo manifold valve 5 Using the vacuum pump evacuate the system for 30 minutes a Check whether the compound meter indicates 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...

Page 27: ...s and then tighten the flare nut again a Confirm the pressure display in the pressure indicator is slightly higher than the atmospheric pressure b Remove the charge hose from the 3 way valve 7 Fully open the 2 and 3 way valves and tighten the cap of the 2 and 3 way valve 1 2 Refrigerant Recharge ...

Page 28: ...nditioner in cooling mode and charge the system with liquid refrigerant 9 When the electronic scale displays the correct weight refer to the gauge and the pressure of the low side to confirm turn off the air conditioner then disconnect the charge hose from the 3 way service port immediately 10 Mount the caps of service port and 2 and 3 way valves 11 Use a torque wrench to tighten the caps to a tor...

Page 29: ...ce 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 service por...

Page 30: ...a 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 d Wait for 5 minutes then check whether the gauge needle moves after t...

Page 31: ...system 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 Wait for five 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 5 Disconnect the charge hose from the vacuum pump 6 Mount the caps...

Page 32: ...e with the push pin of Handle Lo to the gas service port of the 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 and charge the system with liquid refrigerant 9 When the electronic scale displays the correct weight refer to the gauge and the pr...

Page 33: ... Panel Procedure Illustration 1 Remove the 2 screws of return air grille subassembly and release the 2 hooks see CJ_CF_001 2 Release the 2 hooks for each filter and then pull up the filter see CJ_CF_002 CJ_CF_001 CJ_CF_002 Note This section is for reference only Actual unit appearance may vary ...

Page 34: ...ocedure Illustration 1 Remove 4 screws of the cover of electronic control box and then remove the cover see CJ_CF_003 2 Disconnect the connectors and then remove the main control board see CJ_CF_004 CJ_CF_003 CJ_CF_004 Note This section is for reference only Actual unit appearance may vary ...

Page 35: ...dure Illustration 1 Remove the fix screw of supporting board see CJ_CF_005 2 Remove the screws of fan motor support and then remove the screw of ground wire see CJ_CF_006 CJ_CF_005 CJ_CF_006 Note This section is for reference only Actual unit appearance may vary ...

Page 36: ...ure Illustration 3 Remove the two screws of the fan motor shaft see CJ_CF_007 4 Release the hooks of the volute shell and then pull up it see CJ_CF_008 CJ_CF_007 CJ_CF_008 Note This section is for reference only Actual unit appearance may vary ...

Page 37: ...Maintenance and Disassembly Page 33 Procedure Illustration 5 Remove the fixing screws of fan 3 screws see CJ_CF_009 CJ_CF_009 Note This section is for reference only Actual unit appearance may vary ...

Page 38: ... Remove the screws of left and right panel and then push it in the direction shown in the figure to move it see CJ_CF_010 2 Remove the screws of the front panel 9 screws see CJ_CF_011 CJ_CF_010 CJ_CF_011 Note This section is for reference only Actual unit appearance may vary ...

Page 39: ... Procedure Illustration 3 Remove the 1 screw of the water collector see CJ_CF_012 4 Remove the 4 screws of board and then remove it see CJ_CF_013 CJ_CF_012 CJ_CF_013 Note This section is for reference only Actual unit appearance may vary ...

Page 40: ... Page 36 Procedure Illustration 5 Remove the screws of the pipe clamp board see CJ_CF_014 6 Pull up the temperature sensor see CJ_CF_015 CJ_CF_014 CJ_CF_015 Note This section is for reference only Actual unit appearance may vary ...

Page 41: ...orator support 5 screws see CJ_CF_016 8 Remove the screws of the rear evaporator support then pull out the evaporator 4 screws see CJ_ CF_017 9 Remove 2 screws and Remove step motor see CJ_CF_018 CJ_CF_016 CJ_CF_017 CJ_CF_018 Note This section is for reference only Actual unit appearance may vary ...

Page 42: ...d Disassembly Page 38 5 Display Board Procedure Illustration 1 Remove 2 screws of display board and remove the display see CJ_ CF_019 CJ_CF_019 Note This section is for reference only Actual unit appearance may vary ...

Page 43: ...stration 1 Remove 5 screws of the cover of electronic control box and then remove the cover see CJ_A6_001 2 Remove the 2 screws of the electronic control box Then release the 2 hooks of the main control board see CJ_ A6_002 CJ_A6_001 CJ_A6_002 Note This section is for reference only Actual unit appearance may vary ...

Page 44: ...ors and then remove the front main control board see CJ_A6_003 4 Turn over the electronic control box Disconnect the connectors and remove the 2 screws of rear main control board see CJ_A6_004 CJ_A6_003 CJ_A6_004 Note This section is for reference only Actual unit appearance may vary ...

Page 45: ...intenance and Disassembly Page 41 Procedure Illustration 5 Remove 2 screws of reactor and remove the reactor see CJ_A6_005 CJ_A6_005 Note This section is for reference only Actual unit appearance may vary ...

Page 46: ...d fan Procedure Illustration 1 Remove 10 screws of the top cover and then remove the top cover see CJ_A6_006 2 Release the 8 hooks of volute shell see CJ_A6_007 CJ_A6_006 CJ_A6_007 Note This section is for reference only Actual unit appearance may vary ...

Page 47: ...Maintenance and Disassembly Page 43 Procedure Illustration 3 Remove the fiing screws of fan 2 screws see CJ_A6_008 CJ_A6_008 Note This section is for reference only Actual unit appearance may vary ...

Page 48: ...water collecter and remove the water collecter see CJ_A6_009 2 Remove the screws of the pipe clamp board and the left side board 3 for the pipe clamp and 9 for left side board see CJ_A6_010 CJ_A6_009 CJ_A6_010 Note Remove the front panel refer to 1 Front panel before disassembling electrical parts ...

Page 49: ... the 2 fixing screws of the evaporator support and then pull up the temperature sensor see CJ_A6_011 4 Remove the fixing screw of the evaporator and then remove it see CJ_A6_012 CJ_A6_011 CJ_A6_012 Note This section is for reference only Actual unit appearance may vary ...

Page 50: ...ont Panel and Display Board Procedure Illustration 1 Release the 2 hooks and open the panel see CJ_CASSETTE_001 2 Pull up the filter see CJ_ CASSETTE_002 CJ_CASSETTE_001 CJ_CASSETTE_002 Note This section is for reference only Actual unit appearance may vary ...

Page 51: ...nce and Disassembly Page 47 Procedure Illustration 3 Disconnect the connectors and release the panel see CJ_ CASSETTE_003 CJ_CASSETTE_003 Note This section is for reference only Actual unit appearance may vary ...

Page 52: ...n Procedure Illustration 1 Remove the 2 screws and remove the cover of electronic control box see CJ_CASSETTE_004 2 Remove the 2 screws of the main control board see CJ_ CASSETTE_005 CJ_CASSETTE_004 CJ_CASSETTE_005 Note This section is for reference only Actual unit appearance may vary ...

Page 53: ...Disassembly Page 49 Procedure Illustration 3 Disconnect the connectors and then remove the main control board see CJ_CASSETTE_006 CJ_CASSETTE_006 Note This section is for reference only Actual unit appearance may vary ...

Page 54: ...screws of display board and remove the display board see CJ_CASSETTE_007 2 Turn over the display board prise the 6 hooks with a flat screwdriver as shown in the figure see CJ_ CASSETTE_008 CJ_CASSETTE_007 CJ_CASSETTE_008 Note This section is for reference only Actual unit appearance may vary ...

Page 55: ...n 1 Remove the fixing nut of the fan and then pull up the fan see CJ_ CASSETTE_009 2 Remove the 2 screws of fixing board and the 4 fixing nuts of fan motor see CJ_CASSETTE_010 CJ_CASSETTE_009 CJ_CASSETTE_010 Note This section is for reference only Actual unit appearance may vary ...

Page 56: ...ustration 1 Remove the 4 screws of the panel and pull up the panel see CJ_ CASSETTE_011 2 Remove the 2 screws of seal boardpipe clamp board see CJ_ CASSETTE_012 CJ_CASSETTE_011 CJ_CASSETTE_012 Note This section is for reference only Actual unit appearance may vary ...

Page 57: ... 4 screws of the evaporator support and then remove it see CJ_CASSETTE_013 4 Remove the 2 screws of the evaporator fixing bracket and then remove it see CJ_CASSETTE_014 CJ_CASSETTE_013 CJ_CASSETTE_014 Note This section is for reference only Actual unit appearance may vary ...

Page 58: ...ation 1 Take off the fasten belt of the water pump see CJ_CASSETTE_015 2 Pinch the metal wire in the direction shown in the fiure to release it see CJ_CASSETTE_016 CJ_CASSETTE_015 CJ_CASSETTE_016 Note This section is for reference only Actual unit appearance may vary ...

Page 59: ...and Disassembly Page 55 Procedure Illustration 3 Remove the 3 fixing screws and then remove the water pump see CJ_CASSETTE_017 CJ_CASSETTE_017 Note This section is for reference only Actual unit appearance may vary ...

Page 60: ...onditioner and the power breaker 2 Remove the screws of the big handle and then remove the big handle 3 screws see CJ_CA30_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_ CA30_002 CJ_CA30_001 CJ_CA30_002 Note This section is for reference only Actual unit appearance may vary Top Cover ...

Page 61: ...nd then remove the front panel 7 screws see CJ_CA30_003 5 Remove the screws of water collecting cover and then remove the water collecting cover 1 screw see CJ_ CA30_004 CJ_CA30_003 CJ_CA30_004 Note This section is for reference only Actual unit appearance may vary Front Panel Water Collecting Cover ...

Page 62: ...bly Page 58 Procedure Illustration 6 Remove the screws of the right panel and then remove the right panel 6 screws see CJ_CA30_005 CJ_CA30_005 Note This section is for reference only Actual unit appearance may vary Right Panel ...

Page 63: ...r breaker 2 Remove the screws of the big handle and then remove the big handle 2 screws see CJ_D30_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_ D30_002 CJ_D30_001 CJ_D30_002 Note This section is for reference only Actual unit appearance may vary Top Cover ...

Page 64: ...the front right panel and then remove the front right panel 2 screws see CJ_D30_003 5 Remove the screws of the front panel and then remove the front panel 9 screws see CJ_D30_004 CJ_D30_003 CJ_D30_004 Note This section is for reference only Actual unit appearance may vary Front Panel ...

Page 65: ...g cover and then remove the water collecting cover 2 screw see CJ_ D30_005 7 Remove the screws of the right panel and then remove the right panel 8 screws see CJ_D30_006 CJ_D30_005 CJ_D30_006 Note This section is for reference only Actual unit appearance may vary Right Panel Water Collecting Cover ...

Page 66: ...dle and then remove the big handle 2 screws see CJ_E30_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_ E30_002 4 Remove the screws of water collecting cover and then remove the water collecting cover 2 screw see CJ_ E30_003 CJ_E30_001 CJ_E30_002 CJ_E30_003 Note This section is for reference only Actual u...

Page 67: ...mbly Page 63 Procedure Illustration 5 Remove the screws of the front right panel and then remove the front right panel 2 screws see CJ_E30_004 CJ_E30_004 Note This section is for reference only Actual unit appearance may vary ...

Page 68: ...he front panel and then remove the front panel 7 screws see CJ_E30_005 7 Remove the screws of the right panel and then remove the right panel 10 screws see CJ_E30_006 CJ_E30_005 CJ_E30_006 Note This section is for reference only Actual unit appearance may vary Front Panel Right Panel ...

Page 69: ... the nut securing the fan with a spanner see CJ_ODU_001 2 Remove the fan 3 Disconnect the connectors for fan motor Blue wire yellow wire red wire brown wire and black wire The blue wire and red wire are on the capacitor The black wire connects with terminal 4 see CJ_ODU_002 CJ_ODU_001 CJ_ODU_002 Note This section is for reference only Actual unit appearance may vary D cut Connectors for fan motor ...

Page 70: ...ssembly Page 66 Procedure Illustration 4 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_003 5 Remove the fan motor CJ_ODU_003 Note This section is for reference only Actual unit appearance may vary Fan Motor ...

Page 71: ...N1 NB8 YUFE36BYSM MO 1 Procedure Illustration 1 Remove the nut securing the fan with a spanner see CJ_ODU_004 2 Remove the fan 3 Disconnect the connectors for fan motor see CJ_ODU_005 CJ_ODU_004 CJ_ODU_005 Note This section is for reference only Actual unit appearance may vary D cut ...

Page 72: ...ssembly Page 68 Procedure Illustration 4 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_006 5 Remove the fan motor CJ_ODU_006 Note This section is for reference only Actual unit appearance may vary Fan Motor ...

Page 73: ... 1 Remove the nut securing the fan with a spanner see CJ_ODU_007 2 Remove the fan 3 Disconnect the connectors for fan motor from the terminal see CJ_ ODU_007 4 Remove the fixing screws of the fan motor 4 screws see CJ_ODU_008 5 Remove the fan motor CJ_ODU_007 CJ_ODU_008 Note This section is for reference only Actual unit appearance may vary D cut Fan Motor ...

Page 74: ...ect 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_009 3 Disconnect the wires connected to 4 way valve Blue wires on terminal 2 3 see CJ_ODU_009 4 Remove the fixing screw of the compressor capacitor then pull it out see CJ_ODU_009 5 Remove the electrical parts see CJ_ ODU_009 CJ_ODU_009 Note This sec...

Page 75: ...ation 6 Disconnect the power transformer see CJ_ODU_010 7 Disconnect the wires connected to terminals see CJ_ODU_010 8 Disconnect the wires connected to contactor see CJ_ODU_010 9 Disconnect the wires connected to T3 T4 sensor see CJ_ODU_010 CJ_ODU_010 Note This section is for reference only Actual unit appearance may vary ...

Page 76: ...ee CJ_ODU_011 11 Disconnect the wires connected to high low pressure switch see CJ_ ODU_011 12 Disconnect the wires connected to indoor unit see CJ_ODU_011 13 Disconnect the wires connected to AC contactor see CJ_ODU_011 14 Remove the screws of the capacitor and then remove it 1screw for each capacitor see CJ_ODU_012 CJ_ODU_011 CJ_ODU_012 Note This section is for reference only Actual unit appeara...

Page 77: ...stration 15 Remove the 1 screw of the AC contactor and then remove it see CJ_ODU_013 16 Remove 2 screws of the transformer and then remove it see CJ_ ODU_014 CJ_ODU_013 CJ_ODU_014 Note This section is for reference only Actual unit appearance may vary ...

Page 78: ...ove the panel plate electrical parts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling sound blanket Procedure Illustration 1 Remove the sound blanket side and top see CJ_ODU_015 CJ_ODU_015 Note This section is for reference only Actual unit appearance may vary Sound Blanket side Sound Blanket top ...

Page 79: ... plate electrical parts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling four way valve Procedure Illustration 1 Heat up the brazed parts and then detach the the four way valve and the pipe see CJ_ODU_016 2 Remove the four way valve assembly with pliers CJ_ODU_016 Note This section is for reference only Actual unit appearance may vary ...

Page 80: ...rts and fan assembly refer to 1 Panel plate 2 Electrical parts and 3 Fan assembly before disassembling compressor Procedure Illustration 1 Remove the flange nut of terminal cover and remove the termianal cover see CJ_ ODU_017 2 Disconnect the connectors see CJ_ ODU_018 CJ_ODU_017 CJ_ODU_018 Note This section is for reference only Actual unit appearance may vary Terminal Cover ...

Page 81: ...ted on the bottom plate see CJ_ODU_019 4 Heat up the brazed parts and then remove the the discharge pipe and the suction pipe see CJ_ODU_020 5 Lift the compressor from the base pan assembly with pliers CJ_ODU_019 CJ_ODU_020 Note This section is for reference only Actual unit appearance may vary Discharge Pipe Suction Pipe ...

Page 82: ...Error Code 95 5 1 Common Check Procedures 95 5 2 Open circuit or short circuit of T1 or T2 temperature sensor diagnosis and solution 96 5 3 EEPROM parameter error diagnosis and solution 97 5 4 Water level alarm malfunction diagnosis and solution 98 5 5 EC Refrigerant Leakage Detection diagnosis and solution 99 5 6 F0 Communication malfunction between indoor unit and auto lifting panel diagnosis an...

Page 83: ...nce diagnosis and solution 102 5 9 Lack of Phase diagnosis and solution 103 5 10 Overload current protection diagnosis and solution 104 5 11 High temperature or protection of pressure diagnosis and solution 105 Troubleshooting ...

Page 84: ... are fully discharged before troubleshooting For other models connect discharge resistance approx 100Ω 40W or a soldering iron plug between the positive and negative terminals of the electrolytic capacitor The terminals are located on the bottom surface of the outdoor PCB Note This picture is for reference only Actual appearances may vary ...

Page 85: ...s in open circuit or has short circuited except for 18k 24k 36k cooling only models Page 96 Flash Flash OFF OFF E7 Indoor unit EEPROM parameter error Page 97 Flash off off Flash EC Refrigerant leak detected Page 99 OFF OFF OFF Flash E8 Water level alarm malfunction Page 98 For A6 Duct type Operation lamp flashes Timer lamp Display Error Information Solution 1 time OFF E0 Indoor unit EEPROM paramet...

Page 86: ...age 97 OFF OFF OFF Flash E8 Water level alarm malfunction Page 98 Flash Flash Flash OFF Ed Protection of Low pressure only for 48k and 60k models Page 105 Flash OFF OFF Flash EC Refrigerant leakage detection Page 99 Flash OFF Flash Flash F0 Communication malfunction between main PCB and up down panel PCB Page 100 OFF Flash Flash Flash F1 Up down panel malfunction Page 101 OFF ON Flash Flash F2 Up ...

Page 87: ...F Lack of phase A B Page 103 OFF OFF OFF Lack of phase C Page 103 Flash Flash OFF Protection of low pressure only for 48k and 60k models Page 105 off OFF Flash Overload of current Page 104 off Flash Flash Open circuit and short circuit trouble of T3 Page 96 Off Flash Off protection of high pressure only for 48k and 60k models Page 105 Flash Flash Flash High temperature protection of condenser Page...

Page 88: ... field maintenance Problem Solution 1 Unit will not start Page 90 91 2 The power switch is on but fans will not start Page 90 91 3 The temperature on the display board cannot be set Page 90 91 4 Unit is on but the wind is not cold hot Page 90 91 5 Unit runs but shortly stops Page 90 91 6 The unit starts up and stops frequently Page 90 91 7 Unit runs continuously but insufficient cooling heating Pa...

Page 89: ...2 93 5 Condenser Outdoor fan will not start Page 92 93 6 Unit runs but shortly stops Page 92 93 7 Compressor short cycles due to overload Page 92 93 8 High discharge pressure Page 92 93 9 Low discharge pressure Page 92 93 10 High suction pressure Page 92 93 11 Low suction pressure Page 92 93 12 Unit runs continuously but insufficient cooling Page 92 93 13 Too cool Page 92 93 14 Compressor is noisy...

Page 90: ...t will not start Operation is erratic unpredictable or unit is unresponsive The tempreture on the playboard cannot be setted Unit is on but the wind is not cold hot Unit runs but shortly stops The unit startup and stop frequently Unit runs continuously but insufficient cooling heating Cool can not change to heat Unit is noisy The unit emits a bad odor Test method remedy Test voltage Close the powe...

Page 91: ...t or outlet of either unit is blocked Interference from cell phone towers and remote boosters Shipping plates remain attached Check heat load Tighten bolts or screws Close all the windows and doors Remove the obstacles Reconnect the power or press ON OFF button on remote control to restart Remove them Others ...

Page 92: ...t 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 circ...

Page 93: ...ulb Heavy load condition Loosen hold down bolts and or screws Shipping plates remain attached Poor choices of capacity Contact of piping with other piping or external plate Replace the compressor Leak test Replace restricted part Clean or replace Clean coil Check fan Change charged refrigerant volume Clean condenser or remove obstacle Purge evacuate and recharge Remove obstruction to air folow Rem...

Page 94: ...acement Error Code E2 E3 E4 E7 E8 E0 EC F0 F1 Indoor PCB x x T1 sensor x x x x x x x x T2 Sensor x x x x x x x T3 Sensor x x x x x x x x Additional refrigerant x x x x x x x Water level switch x x x x x x x x Water pump x x x x x x x x Louver motor x x x x x x x x Up down panel PCB x x x x x x x x For A6 Duct type Part requiring replacement Error Code E0 E4 E5 EE EC F2 FA Indoor PCB x T1 sensor x ...

Page 95: ...ture Sensor Check Disconnect the temperature sensor from PCB measure the resistance value with a tester Temperature Sensors Room temp T1 sensor Indoor coil temp T2 sensor Outdoor coil temp T3 sensor Outdoor ambient temp T4 sensor Measure the resistance value of each winding by using the multi meter ...

Page 96: ... or higher than 4 94V the LED will display the failure Recommended parts to prepare Wiring mistake Faulty sensor Faulty PCB Troubleshooting and repair C heck the connecti on betw een tem perature sensorand PC B Repl ace the i ndoorPC B or the outdoorel ectroni c controlbox I s i tw i thi n acceptabl e param eters I s i tproperl y w i red Ensure properconnecti ons N O M easure the resi stance val u...

Page 97: ...OM chip Recommended parts to prepare Indoor PCB Troubleshooting and repair Shutof ft he pow ersuppl y and t ur n i ton 2 m i nut es l at er I s i tst i l ldi spl ayi ng t he er r orcode YES Repl ace t he i ndoorm ai n PC B The uni ti s oper at i ng nor m al l y N O Remarks The location of the EEPROM chip on the indoor PCB is shown in the following image Note These images are for reference only ...

Page 98: ...artthe uni t2 m i nutes l ater I s i tsti l ldi spl ayi ng the errorcode Pow eroff then restartthe uni t2 m i nutes l ater I s i tsti l ldi spl ayi ng the errorcode Repl ace the w aterpum p Repl ace the w aterpum p I fthe w ater l evelsw i tch i s broken I fthe w ater l evelsw i tch i s broken I fthe w ater l evelsw i tch i s i nserted w el l I fthe w ater l evelsw i tch i s i nserted w el l I nse...

Page 99: ...bl ow i ng outfrom i ndoorai routl et I s there coolai rbl ow i ng outfrom i ndoorai routl et I s i tsecurel y attached I s i tsecurel y attached N O C heck the T2 sensor C heck the T2 sensor YES C heck system forl eakages C heck system forl eakages N O N O Repai rthe l eakage and recharge the refri gerant Repai rthe l eakage and recharge the refri gerant YES N O The com pressor i s operati ng con...

Page 100: ...mmunication failure between indoor unit and auto lifting panel Communication failure between indoor unit and auto lifting panel N O Replace the indoor main PCB Replace the indoor main PCB is it in working order is it in working order YES Has the problem been solved Has the problem been solved Check the wire connection between auto lifting panel and indoor unit Check the wire connection between aut...

Page 101: ...g paneli s defecti ve Repl ace i t The m ai n controlPC B ofauto l i fti ng paneli s defecti ve Repl ace i t Yes N o A re they w i red i ncorrectl y A re they w i red i ncorrectl y Yes Reconnect Reconnect N o C ontrolpanelto l i ftordrop by control l er C ontrolpanelto l i ftordrop by control l er Pow eroff then restartthe uni t2 m i nutes l ater Pow eroff then restartthe uni t2 m i nutes l ater H...

Page 102: ...wer supply Faulty outdoor PCB Troubleshooting and repair Phase sequence error Phase sequence error I fm al functi on i s sti l lnotsol ved I fm al functi on i s sti l lnotsol ved C hange the orderoftw o ofthe w i res to pow ersuppl y C hange the orderoftw o ofthe w i res to pow ersuppl y YES Repl ace the outdoorm ai n PC B Repl ace the outdoorm ai n PC B Sw i tch on the uni tagai n Sw i tch on the...

Page 103: ... 230V i s i t3 phase 220 230V YES I s the vol tage i n outdoorterm i nali s 3 phase 220 230V I s the vol tage i n outdoorterm i nali s 3 phase 220 230V C heck the pow ersuppl y C heck the pow ersuppl y C heck the connecti on betw een pow ersuppl y and term i nal C heck the connecti on betw een pow ersuppl y and term i nal Restartthe uni tw hen the pow er suppl y returns to norm al Restartthe uni t...

Page 104: ...epair C heck the pow ersuppl y D o any exi st A re they w i thi n acceptabl e param eters A re they properl y connected I s i ti n w orki ng order Repl ace the outdooruni t I s i ti n w orki ng order C heck system forbl ockages YES Stop the uni t N O C l earthe bl ockage N O C heck the com pressorresi stance val ues YES Repl ace the com pressor N O C heck the connecti ons and w i res YES Ensure pr...

Page 105: ... i n the refri gerant 3 H eatexchangeri s di rty 4 O utdoorfan orfan bl ade i s defecti ve 5 O utdooruni ti s i n bad venti l ati on 6 Refri geranti s l eakage Possi bl e reason 1 The w i res i s l oose to K1 2 A i rorothergas i n the refri gerant 3 H eatexchangeri s di rty 4 O utdoorfan orfan bl ade i s defecti ve 5 O utdooruni ti s i n bad venti l ati on 6 Refri geranti s l eakage YES I spressur...

Page 106: ...Contents i Temperature Sensor Resistance Value Table for T1 T2 T3 and T4 C K 112 i Pressure On Service Port 113 ...

Page 107: ...171 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...

Page 108: ...85 29 44 95 35 105 40 56 115 46 11 120 48 89 PSI 70 59 93 94 106 116 119 113 117 125 147 154 PSI 75 63 97 99 115 125 124 120 126 132 155 162 PSI 80 67 103 104 123 138 135 129 132 140 162 173 PSI 90 73 112 113 139 152 149 138 145 154 180 189 F C ODT IDT 0 17 5 15 15 9 44 45 7 22 75 23 89 85 29 44 95 35 105 40 56 115 46 11 120 48 89 MPA 70 59 0 64 0 65 0 73 0 8 0 82 0 78 0 81 0 86 1 01 1 06 MPA 75 6...

Page 109: ...DT 57 53 13 89 11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 0 2 17 19 17 18 27 28 PSI 55 439 413 367 330 302 268 239 PSI 65 471 435 386 368 339 297 276 PSI 75 489 457 403 381 362 312 290 F C ODT IDT 57 53 13 89 11 67 47 43 8 33 6 11 37 33 2 78 0 56 27 23 2 78 5 17 13 8 33 10 56 0 2 17 19 17 18 27 28 MPA 55 3 03 2 85 2 53 2 28 2 08 1 85 1 65 MPA 65 3 25 3 00 2 66 2 54 2 33 2 ...

Page 110: ...2019 Johnson Controls Inc www johnsoncontrols com Johnson Controls reserve the right to change product features without prior notice Form MYFETM MOW1 190830 ...

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