Mitsubishi Electric SUZ-KA60VA3, Техническое и сервисное руководство

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27
SUZ-KA60VA3.TH SUZ-KA71VA3.TH
No. Symptom LED indication
Abnormal point/
Condition
Condition Remedy
1
Outdoor unit
does not
operate. 1-time fl ash every
2.5 seconds Outdoor power
system Overcurrent protection cut-out operates 3 consecutive times
within 1 minute after the compressor gets started. Reconnect connector of
compressor.
Refer to 11-5.
a
"How to check
inverter/compressor".
Check stop valve.
•
•
•
2
Outdoor thermistors Discharge temperature thermistor, fi n temperature thermistor,
defrost thermistor, outdoor heat exchanger temperature
thermistor, P.C. board temperature thermistor or ambient
temperature thermistor shorts or opens during compressor
running.
Refer to 11-5.
g
"Check of outdoor
thermistors".
•
3
Outdoor control
system Nonvolatile memory data cannot be read properly.
(The upper lamp of OPERATION INDICATOR lamp of the
indoor unit lights up or fl ashes 7-time.)
Replace inverter P.C. board. •
4
6-time fl ash
2.5 seconds OFF
Serial signal The communication fails between the indoor and outdoor unit
for 3 minutes.
Refer to 11-5.
m
"How to check
miswiring and serial signal error.
•
5
11-time fl ash
2.5 seconds OFF Stop valve/
Closed valve Closed valve is detected by compressor current. Check stop valve. •
6
14-time fl ash
2.5 seconds OFF Outdoor unit
(Other abnormality) Outdoor unit is defective. Refer to 11-2.1. "Flow chart of the
detailed outdoor unit failure mode
recall function". •
7
'Outdoor unit
stops and
restarts 3
minutes later'
is repeated. 2-time fl ash
2.5 seconds OFF Overcurrent
protection Large current fl ows into intelligent power module. Reconnect connector of
compressor.
Refer to 11-5.
a
"How to check
inverter/compressor".
Check stop valve.
•
•
•
8
3-time fl ash
2.5 seconds OFF Discharge
temperature
overheat protection 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.
Refer to 11-5.
k
"Check of LEV".
•
•
9
4-time fl ash
2.5 seconds OFF Fin temperature /P.C.
board temperature
thermistor overheat
protection Temperature of fi n temperature thermistor on the heat sink
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.
Refer to 11-5.
i
"Check of outdoor
fan motor".
•
•
•
10
5-time fl ash
2.5 seconds OFF High pressure
protection Temperature of indoor coil thermistor exceeds 70°C in HEAT
mode. Temperature of outdoor heat exchanger temperature
thermistor exceeds 70°C in COOL mode. Check refrigerant circuit and
refrigerant amount.
Check stop valve. •
•
11
8-time fl ash
2.5 seconds OFF Compressor
synchronous
abnormality The waveform of compressor current is distorted. Reconnect connector of
compressor.
Refer to 11-5.
a
"How to check
inverter/compressor".
•
•
12
10-time fl ash
2.5 seconds OFF Outdoor fan motor Outdoor fan has stopped 3 times in a row within 30 seconds
after outdoor fan start-up. Refer to 11-5.
i
"Check of outdoor
fan motor.
Refer to 11-5.
l
"Check of inverter
P.C. board.
•
•
13
12-time fl ash
2.5 seconds OFF Each phase current
of compressor
Each phase current of compressor cannot be detected
normally. Refer to 11-5.
a
"How to check
inverter/compressor".
•
14
13-time fl ash
2.5 seconds OFF DC voltage DC voltage of inverter cannot be detected normally. Refer to 11-5.
a
"How to check
inverter/compressor".
•
15
Outdoor unit
operates. 1-time fl ash
2.5 seconds OFF Frequency drop by
current protection Current from power outlet is nearing breaker capacity.
PFC module stops due to overcurrent. The unit is normal, but check the
following.
Check if indoor fi lters are clogged.
Check if refrigerant is short.
Check if indoor/outdoor unit air
circulation is short cycled.
•
•
•
16
3-time fl ash
2.5 seconds OFF Frequency drop
by high pressure
protection Temperature of indoor coil thermistor exceeds 55°C in HEAT
mode, compressor frequency lowers.
Frequency drop by
defrosting in COOL
mode Indoor coil thermistor reads 8°C or less in COOL mode,
compressor frequency lowers.
17
4-time fl ash
2.5 seconds OFF Frequency drop
by discharge
temperature
protection Temperature of discharge temperature thermistor exceeds
111°C, compressor frequency lowers. Check refrigerant circuit and
refrigerant amount.
Refer to 11-5.
k
"Check of LEV".
Refer to 11-5.
g
"Check of outdoor
thermistors".
•
•
•
18
Outdoor unit
operates. 7-time fl ash
2.5 seconds OFF Low discharge
temperature
protection Temperature of discharge temperature thermistor has been
50°C or less for 20 minutes. Refer to 11-5.
k
"Check of LEV".
Check refrigerant circuit and
refrigerant amount.
•
•
19
8-time fl ash
2.5 seconds OFF Zero cross detecting
circuit Zero cross signal for PAM control cannot be detected. This is not malfunction. PAM
protection will be activated in the
following cases:
1 Instantaneous power voltage
drop. (Short time power failure)
2 When the power supply voltage
is high.
20
9-time fl ash
2.5 seconds OFF Inverter check mode The connector of compressor is disconnected, inverter check
mode starts.
Check if the connector of the
compressor is correctly connected.
Refer to 11-5.
a
"How to check
inverter/compressor".
•
NOTE: 1. The location of LED is illustrated at the right fi gure. Refer to 11-6-3.
2. LED is lighted during normal operation.
The fl ashing frequency shows the number of times the LED blinks after every 2.5-second OFF.
(Example) When the fl ashing frequency is “2”.
ON
OFF
2.5-second OFF 2.5-second OFF
0.5-second ON
0.5-second ON
Inverter P.C. board
LED
→
Flashing
OCH530