Mitsubishi Electric MUZ-GC25VA, Руководство по обслуживанию

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3. Outdoor unit failure mode table
2-time flash
2.5 seconds OFF
3-time flash
2.5 seconds OFF
4-time flash
2.5 seconds OFF
5-time flash
2.5 seconds OFF
6-time flash
2.5 seconds OFF
7-time flash
2.5 seconds OFF
8-time flash
2.5 seconds OFF
9-time flash
2.5 seconds OFF
10-time flash
2.5 seconds OFF
11-time flash
2.5 seconds OFF
12-time flash
2.5 seconds OFF
14-time flash
2.5 seconds OFF
None (Normal)
Outdoor power system
Discharge temperature thermistor
Defrost thermistor
Fin temperature thermistor
P.C. board temperature thermistor
Ambient temperature thermistor
Overcurrent
Compressor synchronous
abnormality (Compressor start-up
failure protection)
Discharge temperature
High pressure
Fin temperature/ P.C. board
temperature
Outdoor fan motor
Nonvolatile memory data
Discharge temperature
DC voltage
Each phase current of compressor
Overcurrent
Compressor open-phase
Stop valve
(Closed valve)
Abnormal point
(Failure mode / protection)
Over current protection stop is
continuously performed three times
within 1 minute after the compressor
gets started.
Thermistor shorts or opens during
compressor running.
14 A (MUZ-GC25)/24 A (MUZ-GC35)
current flow into intelligent power
module.
Waveform of compressor current is
distorted.
Temperature of discharge temperature
thermistor exceeds 116
: , compressor
stops.
Compressor can restart if discharge
temperature thermistor reads 100
: or
less 3 minutes later.
Temperature indoor coil thermistor
exceeds 70
:
in HEAT mode.
Temperature defrost thermistor exceeds
70
: in COOL mode.
Temperature of fin temperature
thermistor on the inverter P.C. board
exceeds 82
: (MUZ-GC25)/83 : (MUZ
-GC35), or temperature of P.C. board
temperature thermistor on the inverter
P.C. board exceeds 81
: (MUZ-GC25)
/85 : (MUZ-GC35).
Outdoor fan has stopped 3 times
in a row within 30 seconds after outdoor
fan start-up.
Nonvolatile memory data cannot be
read properly.
Temperature of discharge temperature
thermistor has been 50
:
or less for
20 minutes.
DC voltage of inverter cannot be
detected normally.
Each phase current of compressor
cannot be detected normally.
14 A (MUZ-GC25) / 24 A (MUZ-GC35)
current flow into intelligent power
module (IPM).
The open-phase operation of
compressor is detected.
The interphase short out occurs in the
output of the intelligent power
module (IPM).
The compressor winding shorts out.
Closed valve is detected by compressor
current.
Condition
•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
and refrigerant amount.
•Refer to 11-5.
L
"Check
of LEV".
•Check refrigerant circuit
and refrigerant amount.
•Check stop valve.
•Check around outdoor unit.
•Check outdoor unit air
passage.
•Refer to 11-5.
I
"Check of
outdoor fan motor".
•Refer to 11-5.
I
"Check of
outdoor fan motor".
Refer to 11-5.
M
"Check of
inverter P.C. board".
•Replace the inverter P.C.
board.
•Refer to 11-5.
L
"Check
of LEV".
•Check refrigerant circuit
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
Correspondence
Indoor/outdoor
unit failure mode
recall function
Outdoor unit
failure mode
recall function
1-time flash every
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
2.5 seconds OFF
12-time flash
2.5 seconds OFF
7-time flash
2.5 seconds OFF
5-time flash
2.5 seconds OFF
8-time flash
2.5 seconds OFF
9-time flash
2.5 seconds OFF
10-time flash
2.5 seconds OFF
LED indication
(Outdoor P.C. board)
OFF
The upper lamp of
OPERATION INDICATOR
lamp(Indoor unit)
14-time flash
2.5 seconds OFF
NOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-3.).
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