Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 278

Resolución de averías
3. Outdoor unit failure mode table
The upper lamp of
Abnormal point
OPERATION INDICTOR
(Failure mode / protection)
lamp(Indoor unit)
OFF None (Normal)
2-time flash Outdoor power system
2.5 seconds OFF
3-time flash Discharge temperature thermistor
2.5 seconds OFF Defrost thermistor
Fin temperature thermistor
P.C. board temperature thermistor
4-time flash Overcurrent
2.5 seconds OFF
Compressor synchronous
abnormality (Compressor start-up
failure protection)
5-time flash Discharge temperature
2.5 seconds OFF
6-time flash High pressure
2.5 seconds OFF
7-time flash Fin temperature/ P.C. board
2.5 seconds OFF temperature
9-time flash
Nonvolatile memory data
2.5 seconds OFF
10-time flash
Discharge temperature
2.5 seconds OFF
11-time flash DC voltage
2.5 seconds OFF
Each phase current of compressor
12-time flash Overcurrent
2.5 seconds OFF Compressor open-phase
14-time flash Stop valve
2.5 seconds OFF (Closed valve)
NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-3.).
278
LED indication
Condition
(Outdoor P.C. board)
Over current protection stop is
continuously performed three times
within 1 minute after the compressor
gets started.
1-time flash every Thermistor shorts or opens
2.5 seconds
during compressor running.
3-time flash
2.5 seconds OFF
4-time flash
2.5 seconds OFF
11-time flash 12A(MUZ-HC25)/ 14A(MUZ-HC35)
2.5 seconds OFF current flow into intelligent
power module.
12-time flash Waveform of compressor current
2.5 seconds OFF is distorted.
Temperature of discharge
temperature thermistor exceeds 116
compressor stops.
Compressor can restart if discharge
temperature thermistor reads 100
less 3 minutes later.
Temperature of indoor coil
thermistor exceeds 70
When defrost thermistor exceeds 70
in COOL mode.
7-time flash Temperature of fin temperature
2.5 seconds OFF thermistor on the inverter P.C. board
exceeds 82: (MUZ-HC25)/83
(MUZ-HC35), or temperature of P.C.
board temperature thermistor on the
inverter P.C. board exceeds 81
(MUZ-HC25)/ 85: (MUZ-HC35).
Nonvolatile memory data cannot
5-time flash
2.5 seconds OFF be read properly.
Temperature of discharge tempe-
rature thermistor has been 50
for 20 minutes.
8-time flash DC voltage of inverter cannot be
detected normally.
2.5 seconds OFF
9-time flash Each phase current of compressor
cannot be detected normally.
2.5 seconds OFF
10-time flash 12A(MUZ-HC25)/ 14A(MUZ-HC35)
2.5 seconds OFF current flow into intelligent
power module (IPM).
When the open-phase operation of
compressor is detected.
When the interphase short out occurs in
the output of the intelligent power
module (IPM).
When the compressor winding shorts out.
Closed valve is detected by compressor
14-time flash
current.
2.5 seconds OFF
Correspondence
•Reconnect connectors.
•Refer to 11-5. A "How to
check inverter/
compressor".
•Check stop valve.
•Refer to 11-5.G "Check
of outdoor thermistors".
❈Defective outdoor
thermistors can be
identified by checking
the blinking pattern
of LED.
•Reconnect compressor
connector.
•Refer to 11-5.A "How to
check inverter/
compressor".
•Check stop valve.
•Reconnect compressor
connector.
•Refer to 11-5.A "How to
check inverter/
compressor".
•Check refrigerant circuit
°C
, and refrigerant amount.
°C
or
•Check refrigerant circuit
°C
in HEAT mode. and refrigerant amount.
°C •Check stop valve.
•Check around outdoor unit.
•Check outdoor unit air
°C passage.
•Refer to 11-5.I "Check of
outdoor fan motor".
°C
•Replace the inverter P.C.
board.
•Check refrigerant circuit
°C
or less and refrigerant amount.
•Refer to 11-5.A "How to
check inverter/
compressor".
•Reconnect compressor
connector.
•Refer to 11-5. A "How to
check inverter/
compressor".
•Check stop valve.
Indoor/outdoor Outdoor unit
unit failure mode failure mode
recall function recall function