Mitsubishi Electric M-SERIES, Руководство по установке

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104
UPPER OR LEFT LAMP
OF 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
LED 1 LED 2
OFF None (Normal) Not lit Not lit
- - -
2-time blink Outdoor power system Lit Lit
Overcurrent protection cut-out
operates 3 consecutive times within
1 minute after the compressor gets
started.
Compressor protection cut-out
operates 24 consecutive times
within 10 seconds after the
compressor gets started.
• Check the compressor connecting
wire.
• Refer to 12-6. “How to check
inverter/compressor”.
• Check the stop valve.
3-time blink
Discharge temperature thermistor Lit Once
Thermistor shorts or opens during
compressor running.
• Refer to 12-6. “Check of outdoor
thermistors”.
Defrost thermistor Lit Once
Ambient temperature thermistor
Lit Twice
Fin temperature thermistor Lit 3 times
P.C. board temperature thermistor Lit 4 times
• Replace the inverter P.C. board.
Outdoor heat exchanger temperature
thermistor
Lit 9 times
• Refer to 12-6. “Check of outdoor
thermistors”.
4-time blink
Overcurrent Once Not lit
The overcurrent flows into intelligent
power module.
• Check the compressor connecting
wire.
• Refer to 12-6. “How to check
inverter/compressor”.
• Check the stop valve.
-
Compressor
Twice Not lit
The overcurrent flows into intelligent
power module within 10 seconds
after the compressor gets started.
(The compressor gets restarted in
15 seconds.)
• Check the compressor connecting
wire.
• Refer to 12-6. “How to check
inverter/compressor”.
-
9 times Not lit
Waveform of compressor current is
dis-torted.
5-time blink Discharge temperature Lit Lit
Discharge temperature exceeds
116ºC during operation.
• Check the refrigerant circuit and
the refrigerant amount.
• Refer to 12-6. “Check of LEV”.
-
6-time blink High pressure Lit Lit
The outdoor heat exchanger
temperature exceeds 70ºC during
cooling or the indoor gas pipe
temperature exceeds
70ºC during heating.
• Check the refrigerant circuit and
the refrigerant amount.
• Check the stop valve.
-
7-time blink
Fin temperature 3 times Not lit
The fin temperature exceeds 90ºC
during operation.
• Check the around outdoor unit.
• Check the outdoor unit air pas-
-
P.C. board temperature 4 times Not lit
The P.C. board temperature
exceeds 80ºC during operation.
• Refer to 12-6. “Check of out-door
fan motor”.
-
8-time blink Outdoor fan motor Lit Lit
Failure occurs 3 consecutive times
within 30 seconds after the fan gets
started.
• Refer to 12-6. “Check of out-door
fan motor”.
-
9-time blink
Nonvolatile memory data Lit 5 times
Nonvolatile memory data cannot be
read properly.
• Replace the inverter P.C. board.
Power module 7 times Not lit
The output of the power module that
drove the compressor was shorted
or the wind-ing of the compressor
was shorted.
• Refer to 12-6. “How to check
inverter/compressor”.
10-time blink Discharge temperature Lit Lit
The discharge temperature is kept
under 50ºC (COOL mode)/40ºC
(HEAT mode) for more than 40
minutes.
• Check the refrigerant circuit and
the refrigerant amount.
• Refer to 12-6. “Check of LEV”.
-
11-time blink
Current sensor 8 times Not lit
The sensor circuit of current of
compressor shorts or opens during
compressor operate.
• Replace the inverter P.C. board.
Bus-bar voltage 6 times Not lit
The bus-bar voltage exceeds 430
V or falls to 50 V or below during
compres-sor operating.
• Check the power supply.
• Replace the inverter P.C. board.
14-time blink
Stop valve Lit 12 times
The current of compressor is power
module is out of order.
• Check the stop valve.
• Check the refrigerant circuit and
the refrigerant amount.
Refrigerant leakage (Sensor detection) Lit Lit
1.Refrigerant leaks from the piping
or the heat exchanger in the indoor
unit.
2. The following items are used
around the indoor unit.
• Spray (LP gas including Freon, and
whose main ingredient is propane
and butane)
• Aerosol insecticide (including
ethanol)
• Air spray painting (including dichlo-
romethane)
• Charcoal (charcoal fire)
• Chemicals (such as ethanol)
• Turn off the power after the in-door
unit finishes its FAN opera-tion.
(The FAN operation continues for
3 hours.)
• Check the indoor unit to detect the
part where refrigerant leaks.
• Repair the part where refrigerant
leaks.
• Turn on the power again.
• Replace the refrigerant sensor if
the problem is not fixed.
FAILURE MODE RECALL M SERIES - OUTDOOR UNIT - MULTISPLIT - 2 PORTS
MITSUBISHI ELECTRIC / DIAGNOSTIC