Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 327

2-4. Outdoor unit failure mode table
SUZ-KA25VA.TH SUZ-KA35VA.TH SUZ-KA25VAH.TH SUZ-KA35VAH.TH
LED indication Abnormal point
(Outdoor unit) (Failure mode)
1-time flash every Outdoor thermistors
2.5 seconds
2-time flash
2.5 seconds OFF
3-time flash
2.5 seconds OFF
4-time flash
2.5 seconds OFF
5-time flash Outdoor control
2.5 seconds OFF system
7-time flash Fin temperature/ P.C.
2.5 seconds OFF board temperature
overheat
8-time flash Converter control
2.5 seconds OFF system
9-time flash
2.5 seconds OFF
10-time flash Overcurrent protection
2.5 seconds OFF
11-time flash Overcurrent protection
2.5 seconds OFF
12-time flash
2.5 seconds OFF
Lighting Refrigerant system
High pressure
protection
Low discharge
temperature
Outdoor fan
Outdoor power
system ( )
Operation indicator lamp of the indoor unit (only the wireless remote controller use model) blinks twice.
Refer to 12-2-1. 3 and 12-2-3.[Outdoor pattern B].
Details of abnormal
Discharge temperature When thermistors short or open during
Defrost thermistor compressor running.
Ambient temperature thermistor
Fin temperature thermistor
P.C. board temperature thermistor
Nonvolatile memory data When nonvolatile memory data cannot be
read properly, unit stops.
Fin When fin temperature exceeds 83
temperature/ P.C. board (SUZ-KA25VA(H))/ 82
temperature overheat or P.C. board temperature exceeds 85
protection (SUZ-KA25VA(H))/ 81
DC voltage When DC voltage of inverter cannot be
detected normally.
Compressor each phase current When compressor each phase current
cannot be detected normally.
Compressor open-phase When 14A(SUZ-KA25VA(H))/ 24A(SUZ-
protection KA35VA(H)) current flow into intelligent
power module(IPM).
When the
compressor is detected.
When the interphase short out occurs in
the output of the intelligent power
module(IPM).
When the compressor winding shorts out.
Overcurrent protection When 14A(SUZ-KA25VA(H))/ 24A(SUZ-
KA35VA(H)) current flow into intelligent
power module(IPM).
Compressor synchronous When waveform of compressor current is
abnormality distorted.
( Compressor start-up failure
protection)
Discharge temperature overheat When discharge temperature exceeds
116
protection
High pressure protection When the indoor coil themistor(TH5)
(Overheat protection) exceeds 70
When the defrost thermistor exceeds 70
in COOL mode.
Low discharge temperature When discharge temperature has been
protection 50
Outdoor fan protection When outdoor fan has stopped within 30
seconds 3-times in a row after outdoor fan
start-up, unit stops.
Outdoor power system When it consecutively occurs 3 times that
the compressor stops for overcurrent
protection or start-up failure protection
within 1 minute after start-up.
Detection method
°C
°C
(SUZ-KA35VA(H)),
°C (SUZ-KA35VA(H)).
open-phase protection of
°C .
°C
in HEAT mode.
°C or less for 20 minutes.
Resolución de averías
Check point
•Check the outdoor thermistors
Defective outdoor thermistors can be
identified by checking the blinking
pattern of LED.
•Replace the inverter P.C. board.
•Check around outdoor unit.
•Check outdoor unit air passage.
°C
•Check the outdoor fan motor.
•Check the inverter/compressor.
•Reconnect compressor connector.
•Check the inverter/compressor.
•Reconnect compressor connector.
•Check the inverter/compressor.
•Check the stop valve.
•Reconnect compressor connector.
•Check the inverter/compressor.
•Check the refrigerant circuit and
refrigerant amount.
•Check the LEV.
•Check the outdoor thermistors.
•Check refrigerant circuit and
refrigerant amount.
°C
•Check the stop valve.
•Check the refrigerant circuit and
refrigerant amount.
•Check the LEV.
•Check the outdoor fan motor.
•Check the inverter P.C. board.
•Reconnect compressor connector.
•Check the inverter/compressor.
•Check the stop valve.
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