Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 427

2. Outdoor unit failure mode table
MXZ-2A
The left lamp of
Abnormal point
OPERATION INDICAOR
(Failure mode / protection)
lamp(Indoor unit)
None(Normal)
OFF
Outdoor power system
2-time flash
3-time flash Discharge temperature
thermistor
Defrost thermistor
Ambient temperature thermistor
Fin temperature thermistor
P.C. board temperature
thermistor
Outdoor heat exchanger
temperature thermistor
Over current
4-time flash
Compressor
5-time flash Discharge temperature
High pressure
6-time flash
Fin temperature
7-time flash
P.C. board temperature
8-time flash
Outdoor fan motor
9-time flash
Nonvolatile memory data
Discharge temperature
10-time flash
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (13-4.).
LED indication
(Outdoor P.C. board) Condition
LED 1 LED 2
- -
Lighting Lighting When over current protection stop is
continuously performed three times
within 1 minute after the compressor
gets started, or when converter
protection stop or bus-bar voltage
protection stop is continuously
performed three times within 3
minutes after start-up.
Lighting Once When thermistor shorts or opens
during compressor running.
Lighting Once
Lighting Twice
Lighting 3 times
Lighting 4 times
Lighting 9 times
Once Goes out When 28A current flow into intelligent
power module.
The possibility of intercepting the
Twice
Goes
overcurrent by the compressor lock is
out
high.
9 times Goes The compressor doesn't synchronize
out with the operating power.
When discharge temperature exceeds
Lighting Lighting
°C
116 during operation.
Compressor can restart if discharge
temperature thermistor reads 100
less 3 minutes later.
Lighting Lighting When the outdoor heat exchanger
temperature exceeds 70
during cooling or the indoor gas
pipe temperature exceeds 70
during heating.
3 times
Goes
When the fin temperature exceeds
out
87 °C during operation.
When the P.C. board temperature
4 times Goes
°C during operation.
out exceeds 70
Lighting Lighting
When failure occurs continuously
three times within 30 seconds after
the fan gets started.
Lighting 5 times
When nonvolatile memory data
cannot be read properly.
Lighting Lighting
When the frequency of the
compressor is kept 80Hz or
more and the discharge
temperature is kept under 39
for more than 20 minutes.
Resolución de averías
Correspondence
• Check the connection
of the compressor
connecting wire.
• Refer to 13-4.E
"How to check
inverter / compressor".
• Check the stop valve.
• Refer to 13-6.F "Check
of outdoor thermistors".
• Replace the outdoor
electronic control
P.C. board.
• Refer to 13-6.F "Check
of outdoor thermistors".
• Reconnect compressor
connector.
• Refer to 13-6.E "How to
check inverter/
compressor".
• Check the stop valve.
• Check the connection of
the compressor
connecting wire.
• Refer to 13-6.E "How to
check inverter/
compressor".
•Check refrigerant circuit
and refrigerant amount.
• Refer to 13-6.D "Check
°C or of LEV".
•Check refrigerant circuit
°C
and refrigerant amount.
• Check the stop valve.
°C
• Check around outdoor
unit.
• Check outdoot unit air
passage.
• Refer to 13-6.G "Check
of outdoor fan motor".
• Refer to 13-6.G "Check
of outdoor fan motor".
• Replace the outdoor
electronic control
P.C. board.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 13-6.D "Check
°C of LEV".
Indoor/outdoor
unit failure mode
recall function
427