50
Potential causes
●
Faulty 4-way valve
Check of 4-way, please refer to part 5 in 10.4 Trouble Criterion Of Main Parts.
10.3.3.12 When cooling, heat exchanger of non-operating indoor unit frosts.
When heating, non-operating indoor unit get warm.
Potential causes
●
Faulty EXV
●
Wire and piping connected in reverse.
Check of EXV, please refer to part 6 in 10.4 Trouble Criterion Of Main Parts.
Automatic correction of wiring/piping error:
Press the "check switch" on the outdoor unit PCB board 5 seconds until LED display "CE", which
mean this function is working, Approximately 5-10 minutes after the switch is pressed, the "CE"
disappear the wiring/piping error will be corrected, and wiring/piping is properly connected.
Check switch
LED display
Summary of Contents for YU2E14YEEBMHO-X
Page 8: ...7 5 Wiring diagram YU2E14YEEBMHO X YU2E18YEEBMHO X...
Page 10: ...9...
Page 11: ...10 YU4E28YEEBMHO X YU4E36YEEBMHO X...
Page 12: ...11 YU5E42YEEBMHO X...
Page 34: ...33 10 3 1 2 Indoor outdoor units communication error...
Page 39: ...38 10 3 1 4 Open or short circuit of temperature sensor 10 3 1 5 Full water malfunction...
Page 42: ...41 10 3 3 2 Communication malfunction between IPM board and outdoor main board ODU E3...
Page 45: ...44 10 3 3 5 High pressure protection ODU P1 ForYU4E28YEEBMHO X YU4E36YEEBMHO X YU5E42YEEBMHO X...
Page 47: ...46 10 3 3 7 Current protection of compressor ODU P3...
Page 48: ...47 10 3 3 8 Temperature protection of compressor discharge ODU P4...
