Mitsubishi Electric MXZ-2A20NA - 1, Руководство по обслуживанию

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The left lamp of
OPERATION INDICATOR
lamp (Indoor unit)
OFF
2-time flash
3-time flash
4-time flash
5-time flash
6-time flash
7-time flash
8-time flash
Lighting Lighting
Lighting Lighting
Lighting Once
Lighting Once
Lighting Twice
Lighting 3 times
Lighting 4 times
Lighting 9 times
Once Goes out
Lighting Lighting
Lighting Lighting
3 times Goes
out
4 times Goes
out
Lighting Lighting
Lighting Lighting
Lighting 5 times
9-time flash
10-time flash
• Replace the outdoor
electronic control
P.C. board.
• Replace the outdoor
electronic control
P.C. board.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 12-6. "Check
of LEV".
• Reconnect compressor
connector.
• Refer to 12-6. "How to
check inverter/
compressor".
• Check the stop valve.
•Check refrigerant circuit
and refrigerant amount.
• Check the stop valve.
• Refer to 12-6. "Check
of outdoor fan motor".
•Check refrigerant circuit
and refrigerant amount.
• Refer to 12-6. "Check
of LEV".
• Check around outdoor
unit.
• Check outdoor unit air
passage.
• Refer to 12-6. "Check
of outdoor fan motor".
• Check the connection
of the compressor
connecting wire.
• Refer to 12-6.
"How to check
inverter/compressor".
• Check the stop valve.
• Refer to 12-6. "Check
of outdoor thermistors".
• Refer to 12-6. "Check
of outdoor thermistors".
When overcurrent 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.
When thermistor shorts or opens
during compressor running.
When 28A current flows into intelligent
power module.
When discharge temperature exceeds
240.8°F during operation.
Compressor can restart if discharge
temperature thermistor reads 212°F or
less 3 minutes later.
When high-pressure is detected
with the high-pressure switch
(HPS) during operation.
(MXZ-3A30NA, MXZ-3A30NA-
1
, MXZ-4A36NA)
When the outdoor heat exchanger
temperature exceeds 158°F
during cooling or the indoor gas
pipe temperature exceeds 158°F
during heating.
When the fin temperature exceeds
188.6°F during operation.
When the P.C. board temperature
exceeds 158°F during operation.
When failure occurs continuously
three times within 30 seconds after
the fan gets started.
When nonvolatile memory data
cannot be read properly.
When the frequency of the
compressor is kept 80Hz or
more and the discharge
temperature is kept under 102.2°F
for more than 20 minutes.
Outdoor power system
Discharge temperature
thermistor
Defrost thermistor
Ambient temperature thermistor
Fin temperature thermistor
P.C. board temperature
thermistor
Outdoor heat exchanger
temperature thermistor
Overcurrent
Discharge temperature
High pressure
Fin temperature
P.C. board temperature
Outdoor fan motor
Nonvolatile memory data
Discharge temperature
Gas pipe temperature
thermistor A Lighting 10 times
Gas pipe temperature
thermistor B Lighting 11 times
Gas pipe temperature
thermistor C Lighting 12 times
When a short or open circuit is
detected in the thermistor during
cooling.
(A,B: MXZ-2A20NA, MXZ-3A30NA)
(C : MXZ-3A30NA)
None (Normal)
Abnormal point
(Failure mode/protection)
Condition Correspondence
Indoor/outdoor
unit failure mode
recall function
LED indication
(Outdoor P.C. board)
LED 1 LED 2
2. Outdoor unit failure mode table
NOTE
: Blinking patterns of this mode differ from the ones of Troubleshooting check table (12-4.).