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2.13 F1: DC bus voltage protection (Only for 36-56 model)
2.13.1 Digital display output
F1
2.13.2 Description
F1 indicates DC bus voltage protection.
•
•
The system stops running.
•
Error code is displayed on the outdoor unit PCB.
2.13.3 Trigger / recover condition
•
Trigger condition: If IC55 main chip couldn't receive the DC
first 5 seconds period when power on, it would report F1 and the big relay is forbid to close
•
Recover condition: IC55 main chip can receive the DC
•
Reset method: Resume automatically.
2.13.4 Possible causes
•
DC fan motor damaged.
•
The wire connect CN52 with CN53 is loose (36/42 model can ignore this reason for there's not this wire
connection).
•
Main control board damaged.
•
Filter board damaged (36/42 model can ignore this reason for they don't have a filter board).
2.13.5 Procedure
Check LED301 Is
Check the wiring between main control
board and filter board is correct or not.
Voltage of power supply is 166-265V?
F1
flashing or not
Yes
Yes
bus voltage detection signal or the voltage less than 200VDC in the
bus voltage detection signal and the voltage over 200V DC
No
Replace outdoor main PCB
No
Connect again
No
Provide normal power supply
.
.
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