MITSUBISHI ELECTRIC MUZ-GB50VA - Manual (Page 19)

19
11-time flash
• Check the connecting
wire between outdoor
electronic control
P.C. board and power
board.
• Replace the power
board.
• Check the connecting
wire among electronic
control P.C. board,
noise filter P.C. board
and power board.
• Replace the power
board.
When the communication between
boards protection stop is
continuously performed twice.
Communication error occurs
between the electronic control P.C.
board and power board for more
than 10 seconds.
Current sensor protection stop is
continuously performed twice.
When a short or open circuit is
detected in the current sensor
during compressor operating.
The protection stop of the zero
cross detecting circuit is
continuously performed 10 times.
When zero cross signal cannot be
detected while the compressor is
operating.
When a failure is detected in the
operation of the converter during
operation.
When the bus-bar voltage exceeds
400V or falls to 200V or below
during compressor operating.
When the bus-bar voltage exceeds
400V or falls to 50V or below during
compressor operating.
Communication error
between P.C. boards
Current sensor
Zero cross detecting circuit
Converter
Bus-bar voltage
(1)
Bus-bar voltage
(2)
w Even if this protection stop is
performed continuously three
times, it does not mean the
abnormality in outdoor power
system.
Lighting 6 times
Lighting 7 times
5 times Goes
out
5 times Goes
out
5 times
6 times
Goes
out
Goes
out
Abnormal point
(Failure mode / protection)
Condition Correspondence
Indoor/outdoor
unit failure mode
recall function
LED indication
(Outdoor P.C. board)
LED 1 LED 2
The left lamp of
OPERATION INDICATOR
lamp (Indoor unit)
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (10-4.).
MUZ-GB50VA
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