Mitsubishi Electric M Series Manual page 164

WALL-MOUNTED Inverter Heat Pump
MUZ-FD25VA MUZ-GE25VA
MUZ-FD25VABH MUZ-GE25VAH
MUZ-FD35VA MUZ-GE35VA
MUZ-FD35VABH MUZ-GE35VAH
Outdoor unit failure mode table
NOTE: Blinking patterns of this mode differ from the ones of "Troubleshooting check table".
w OPERATION INDICATOR lamp
POWER lamp (MSZ-FD)
Upper lamp (MSZ-GE, MSZ-HC)
Upper/Power
lamp of
OPERATION Abnormal point
INDICATOR (Failure mode/protection)
lamp
(Indoor unit)
OFF None (Normal)
2-time flash Outdoor power system
2.5 seconds
OFF
3-time flash Discharge temperature
2.5 seconds thermistor
OFF
Defrost thermistor
Fin temperature thermistor
P.C. board temperature
thermistor
MSZ-FD, GE
Ambient temperature
thermistor
Outdoor heat exchanger
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 temperature
OFF
MSZ-FD, GE Outdoor fan motor
8-time flash
2.5 seconds
OFF
9-time flash Nonvolatile memory data
2.5 seconds
OFF
MUZ-GE
Power module
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 Compressor
2.5 seconds open-phase
OFF
14-time flash Stop valve (Closed valve)
2.5 seconds
OFF
C-162
MUZ-GE42VA MUZ-GE60VA
MUZ-GE42VAH MUZ-GE71VA
MUZ-GE50VA
MUZ-GE50VAH
LED indication
(Outdoor P.C. board)
—
Overcurrent protection stop is continuously performed 3 times
within 1 minute after the compressor gets started.
—
1-time flash every Thermistor shorts or opens during compressor running.
2.5 seconds
3-time flash
2.5 seconds OFF
4-time flash
2.5 seconds OFF
2-time flash
2.5 seconds OFF
—
11-time flash Large current flows into intelligent power module.
2.5 seconds OFF
12-time flash Waveform of compressor current is distorted.
2.5 seconds OFF
Temperature of discharge temperature thermistor exceeds
116°C, compressor stops.
—
Compressor can restart if discharge temperature thermistor
reads 100°C or less 3 minutes later.
Temperature of indoor coil thermistor exceeds 70°C in HEAT
mode. Temperature of defrost thermistor exceeds 70°C in
—
COOL mode.
7-time flash Temperature of fin temperature thermistor on the inverter
2.5 seconds OFF
P.C. board exceeds 75 °C ~80 °C (MUZ-FD, MUZ-GE)/82°C
(MUZ-HC25)/83°C (MUZ-HC35), or temperature of P.C. board
temperature thermistor on the inverter P.C. board exceeds
70 °C~75 °C (MUZ-FD, MUZ-GE)/81°C (MUZ-HC25)/85°C
(MUZ-HC35).
Outdoor fan has stopped 3 times in a row within 30 seconds
after outdoor fan start-up.
—
5-time flash Nonvolatile memory data cannot be read properly.
2.5 seconds OFF
6-time flash The interphase short circuit occurs in the output of the
2.5 seconds OFF intelligent power module (IPM).
The compressor winding shorts circuit.
Temperature of discharge temperature thermistor has been
50°C or less 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
2.5 seconds OFF normally.
10-time flash Large current flows into intelligent power module (IPM).
2.5 seconds OFF
The open-phase operation of compressor is detected.
The interphase short circuit occurs in the output of the
intelligent power module (IPM).
The compressor winding shorts circuit.
14-time flash Closed valve is detected by compressor current.
2.5 seconds OFF
MUZ-HC25VA
MUZ-HC35VA
MUZ-HC35VAB
Condition
—
M series
Indoor/outdoor
Outdoor unit
unit failure
failure mode
mode recall
recall function
function
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