Mitsubishi Electric SUZ-KA25VA2, Техническое и сервисное руководство

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Refer to 11-5. "How
Refer to 11-5. "How
Refer to 11-5. "Check
Refer to 11-5. "Check
Refer to 11-5. "Check
Refer to 11-5. "Check
Refer to 11-5. "How
Refer to 11-5. "How
Refer to 11-5. "Check
Refer to 11-5. "How
Abnormal point
(Failure mode/protection)
LED indication
(Outdoor P.C. board)
Condition
— — — )l a m r o N ( e n o N
Outdoor power system
—
Overcurrent protection stop is
continuously performed 3 times within
1 minute after the compressor gets
started.
Reconnect connectors.
to check inverter/
compressor".
Check stop valve.
•
•
•
Discharge temperature
thermistor
1-time flash every
2.5 seconds
Thermistor shorts or opens during
compressor running. of outdoor thermistors".
Defective outdoor
thermistors can be
identified by checking
the blinking pattern of
LED.
•
Defrost thermistor
Fin temperature thermistor 3-time flash
2.5 seconds OFF
P.C. board temperature
thermistor
4-time flash
2.5 seconds OFF
Ambient temperature
thermistor
2-time flash
2.5 seconds OFF
Overcurrent 11-time flash
2.5 seconds OFF
Large current fl ows into intelligent
power module.
Reconnect compressor
connector.
to check inverter/
compressor".
Check stop valve.
•
•
•
Compressor synchronous
abnormality (Compressor start-
up failure protection)
12-time flash
2.5 seconds OFF
Waveform of compressor current is
distorted.
Reconnect compressor
connector.
to check inverter/
compressor".
•
•
Discharge temperature
—
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.
Check refrigerant circuit
and refrigerant amount.
of LEV".
•
•
High pressure
—
Temperature indoor coil thermistor
exceeds 70°C in HEAT mode.
Temperature defrost thermistor
exceeds 70°C in COOL mode.
Check refrigerant circuit
and refrigerant amount.
Check stop valve.
•
•
Fin temperature/P.C. board
temperature
7-time flash
2.5 seconds OFF
Temperature of fi n temperature
thermistor on the inverter P.C. board
exceeds 75 ~ 80°C, or temperature of
P.C. board temperature thermistor on
the inverter P.C. board exceeds 70 ~
75°C.
Check around outdoor
unit.
Check outdoor unit air
passage.
of outdoor fan motor".
•
•
•
Outdoor fan motor
—
Outdoor fan has stopped 3 times in a
row within 30 seconds after outdoor
fan start-up.
Refer to 11-5. "Check
of outdoor fan motor".
of inverter P.C. board".
•
Nonvolatile memory data 5-time flash
2.5 seconds OFF
Nonvolatile memory data cannot be
read properly.
Replace the inverter
P.C. board.
•
Discharge temperature
—
Temperature of discharge temperature
thermistor has been 50°C or less for 20
minutes.
of LEV".
Check refrigerant circuit
and refrigerant amount.
•
•
DC voltage 8-time flash
2.5 seconds OFF
DC voltage of inverter cannot be
detected normally. to check inverter/
compressor".
•
Each phase current of
compressor
9-time flash
2.5 seconds OFF
Each phase current of compressor
cannot be detected normally.
Overcurrent Compressor open-
phase
10-time flash
2.5 seconds OFF
Large current fl ows 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.
Reconnect compressor
connector.
to check inverter/
compressor".
•
•
Stop valve (Closed valve) 14-time flash
2.5 seconds OFF
Closed valve is detected by
compressor current.
Check stop valve •
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-3.).
Correspondence
SUZ-KA25VA2.TH SUZ-KA35VA2.TH SUZ-KA50VA2.TH
11-2-4. Outdoor unit failure mode table