Mitsubishi Electric MUZ-HJ25VA-E2 Service Manual page 40

The upper
lamp of
OPERATION Abnormal point
INDICATOR (Failure mode/protection)
lamp
(Indoor unit)
11-time fl ash DC voltage
2.5 seconds
OFF
Each phase current of
compressor
14-time fl ash Stop valve (Closed valve)
or more
2.5 seconds
4-way valve/
OFF
Pipe temperature
Outdoor refrigerant system
abnormality
OBH648F
LED indication
(Outdoor P.C. board)
8-time fl ash DC voltage of inverter cannot be
2.5 seconds OFF detected normally.
9-time fl ash Each phase current of compressor
2.5 seconds OFF cannot be detected normally.
14-time fl ash Closed valve is detected by
2.5 seconds OFF compressor current.
16-time fl ash The 4-way valve does not work
2.5 seconds OFF properly.
The indoor coil thermistor detects an
abnormal temperature.
17-time fl ash A closed valve and air trapped in the
2.5 seconds OFF refrigerant circuit are detected based
on the temperature sensed by the
indoor and outdoor thermistors and the
current of the compressor.
NOTE: Blinking patterns of this mode differ from the ones of
TROUBLESHOOTING CHECK TABLE (11-3.).
Condition
• Refer to 11-5. "How
to check inverter/
compressor".
• Check stop valve.
• Check 4-way valve.
• Replace inverter P.C.
board.
• Check for a gas leak
in a connecting piping
etc.
• Check the stop valve.
• Refer to 11-5.
"Check of outdoor
refrigerant circuit".
40
Indoor/outdoor
unit failure
Remedy
mode recall
recall function
function
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Outdoor unit
failure mode
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