11
Faulty problem
Troubleshooting and repair:
a)
Check if there is a short circuit in CN2 port.
b)
Change a new PCB.
Outdoor unit error
2
.4.8 E2 (ODU) Communication failure between indoor and outdoor unit
Same as 5.4.1
2
.4.9 E4, E5, E6 (ODU) temperature sensor fault
Same as 5.4.2
2
.4.10 E9 (ODU) AC over-voltage / under-voltage protection
Description:
Abnormal increases or decreases in voltage are detected by checking the specified
voltage of detection circuit.
Possible reason:
Power supply error
Refrigerant system leakage or block
Faulty outdoor unit PCB
Troubleshooting and repair:
a)
Check the power supply and measure the voltage.
b)
Repower on the unit and measure the voltage between P and N. When the unit is in standby, is the
voltage between P and N about 310VDC, 340VDC or 380VDC? When start up the unit, is it in
220V~400V? If not, replace a new outdoor PCB. If yes, go to next step.
c)
Check the reactor.
2
.4.11 E10 (ODU) Outdoor unit EEPROM error
Same as 5.4.4
2
.4.12 E11 (ODU) Indoor unit fan motor fault
Please refer to 5.4.5
2
.4.13 E12 (ODU) IPM temperature sensor fault
Description:
the sampling voltage is not at 5V
Possible reason:
Power supply error
