Trouble shooting 7 OUTDOOR UNIT Error Method:
Outdoor unit main PCB model information error or communication error
Indicate or Display:
Refer to error code table.
Detective Actuators:
Outdoor unit Main PCB
Detective details:
When model information of EEPROM is incorrect at power ON. If the above operation is repeated 3 times,
the compressor stops permanently.
Forecast of Cause:
1. External cause (Noise, temporary open, voltage drop) 2. Main PCB failure
Check Point 1-1 : Reset Power supply and operate
Does Error indication show again?
YES
Check Point 2 : Replace Main PCB
Change Main PCB.
NO
Check Point 1-2 : Check external cause
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly or there are no related cables near the power line.
