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Error code check
Error number
Errors
Meaning
Main cause of occurrence
145
Communication
defect (main
board, external
board)
When external signal is
not received at the main
board due to the disorder
of the external board
1. Power cable / Communication cable is not connected.
2. Outdoor unit main / external board defect
n
How to diagnose the disorder
Is the external board
Communication
LED(Yellow) ON?
Connect the power cable again.
Connect communication cable again.
Yes
Yes
No
No
Is the communication
cable correctly connected?
Replace the main board.
Yes
No
Is the main board
normal? [Note 1]
Replace the external board.
[Note 1]
How to check the normal status of the main board and the external board
(If it is normal, communication LED blinks.)
Main board communication LED
and connector
External board communication LED
and connector