Mitsubishi Electric MUY-GL09NA, Руководство по обслуживанию

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The upper
lamp of the
OPERATION
INDICATOR
lamp
(Indoor unit)
Abnormal point
(Failure mode/protection)
LED indication
(Outdoor P.C. board)
Condition Remedy
Indoor/outdoor
unit failure
mode recall
function
Outdoor unit
failure mode
recall function
10-time blink
2.5 seconds
OFF Discharge temperature
—
Temperature of discharge temperature
thermistor has been 122°F (50°C) or
less for 20 minutes.
• Refer to 10-5. "Check
of LEV".
• Check refrigerant
circuit and refrigerant
amount.
—
ż
11-time blink
2.5 seconds
OFF Bus-bar voltage (DC) 8-time blink
2.5 seconds OFF Bus-bar voltage of inverter cannot be
detected normally.
• Refer to 10-5. "How
to check inverter/
compressor".
—
ż
Each phase current of
compressor 9-time blink
2.5 seconds OFF Each phase current of compressor
cannot be detected normally.
14-time blink
2.5 seconds
OFF Stop valve (Closed valve) 14-time blink
2.5 seconds OFF Closed valve is detected by
compressor current.
• Check stop valve.
ż ż
4-way valve/
Pipe temperature 16-time blink
2.5 seconds OFF The 4-way valve does not work
properly.
The indoor coil thermistor detects an
abnormal temperature.
• Check the 4-way
valve.
• Replace the inverter
P.C. board.
16-time blink
2.5 seconds
OFF Outdoor refrigerant system
abnormality 1-time blink
2.5 seconds OFF A closed valve and air trapped in the
refrigerant circuit are detected based
on the temperature sensed by the
indoor and outdoor thermistors and the
current of the compressor.
• Check for a gas leak
in a connecting piping
etc.
• Check the stop valve.
• Refer to 10-5.
“Check of outdoor
refrigerant circuit”.
ż ż
NOTE: Blinking patterns of this mode differ from the ones of
TROUBLESHOOTING CHECK TABLE (10-3.).
OBH733G