Service manual

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LED1 LED2
OFF Normal
11-time flash
Converter Communication error
between P.C. boards
Lighting 6 times When the communication between
boards protection stop is
continuously performed twice.
• Check the connecting wire
between outdoor electronic control
P.C. board and power board.
Communication between P.C.
boards protection
Lighting 6 times Communication error occurs
between the electronic control P.C.
board and power board for more
than 10 seconds.
Current sensor Lighting 7 times Current sensor protection stop is
continuously performed twice.
• Replace the power board.
Current sensor protection Lighting 7 times When a short or open circuit is
detected in the current sensor
during compressor operating.
Zero cross detecting circuit 5 times Goes
out
The protection stop of the zero
cross detecting circuit is
continuously performed 10 times.
• Check the connecting wire among
electronic control P.C. board, noise
filter P.C. board and power board.
Zero cross detecting circuit
protection
5 times Goes
out
When zero cross signal cannot be
detected while the compressor is
operating.
Converter protection 5 times
Goes
out
When a failure is detected in the
operation of the converter during
operation.
• Replace the power board.
Bus-bar voltage
protection (1)
5 times When the bus-bar voltage exceeds
400V or falls to 200V or below
during compressor operating.
Bus-bar voltage
protection (2)
wEven if this protection stop is
performed continuously three
times, it does not mean the
abnormality in outdoor power
system.
6 times When the bus-bar voltage exceeds
400V or falls to 50V or below during
compressor operating.
Indoor operation
indicator lamp
Abnormal point
(Failure mode)
Details of abnormal point Detecting method Check point
Indoor/outdoor
failure mode
recall function
Outdoor LED indication
-
-
-
-
Goes
out
Goes
out
-
OB389 --1qxp 05.1.26 18:14 Page 29