Mitsubishi Electric MXZ-2B30VA Service Manual page 67

Upper or left lamp of
Abnormal point
OPERATION INDICATOR
(Failure mode / protection)
lamp (Indoor unit)
Current sensor
11-time flash
Bus-bar voltage
14-time flash Power module
Stop valve
(Closed valve)
15-time flash LEV and drain pump
NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4).
OBH554D
LED indication
(Outdoor P.C. board) Condition
LED 1 LED 2
8 times Goes A short or open circuit is detected in
out the current sensor
during compressor operating.
6 times Goes The bus-bar voltage exceeds 430 V
out or falls to 50 V or below during
compressor operating.
7 times Goes
There is a high possibility that the
out
power module is out of order.
Lighting 12 times
Closed valve is detected by compressor
current.
(MXZ-2B30VA, MXZ-2B40VA)
Lighting Lighting The indoor unit detects an abnormality
in the LEV and drain pump.
67
Indoor/outdoor
Remedy
unit failure mode
recall function
• Replace the power
board.
• Replace the power
board.
• Refer to 11-6. "How to
check inverter/
compressor".
• Check the stop valve.
• Refer to 11-6. "Check
of LEV".
• Check the drain pump of
the indoor unit.