56
The left lamp of
OPERATION INDICAOR
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
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
• Check the connection
of the compressor
connecting wire.
• Refer to 13-4.
E
"How to check
inverter / compressor".
• Check the stop valve.
• Replace the outdoor
electronic control
P.C. board.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 13-6.
D
"Check
of LEV".
• Refer to 13-6.
G
"Check
of outdoor fan motor".
• Replace the outdoor
electronic control
P.C. board.
•Check refrigerant circuit
and refrigerant amount.
• Refer to 13-6.
D
"Check
of LEV".
• Reconnect compressor
connector.
• Refer to 13-6.
E
"How to
check inverter/
compressor".
• Check the stop valve.
•Check refrigerant circuit
and refrigerant amount.
• Check the stop valve.
• Check around outdoor
unit.
• Check outdoot unit air
passage.
• Refer to 13-6.
G
"Check
of outdoor fan motor".
• Refer to 13-6.
F
"Check
of outdoor thermistors".
• Refer to 13-6.
F
"Check
of outdoor thermistors".
When over current 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 flow into intelligent
power module.
When discharge temperature exceeds
116
:
during operation.
Compressor can restart if discharge
temperature thermistor reads 100
:
or
less 3 minutes later.
When high-pressure is detected
with the high-pressure switch
(HPS) during operation.(MXZ-4A80)
When the outdoor heat exchanger
temperature exceeds 70
:
during cooling or the indoor gas
pipe temperature exceeds 70
:
during heating.
When the fin temperature exceeds
87
:
during operation.
When the P.C. board temperature
exceeds 70
:
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 39
:
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
Over current
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
Gas pipe temperature
thermistor D
Lighting 13 times
When a short or open circuit is
detected in the thermistor during
cooling.
(A,B,C : MXZ-3A54/4A71/4A80)
(D : MXZ-4A71/4A80)
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
NOTE : Blinking patterns of this mode differ from the ones of Troubleshooting check table (13-4.).
MXZ-3A/4A
OB377--2.qxp 05.12.14 3:13 PM Page 56
