Mitsubishi Electric SRK100VNPZJX, Technical Manual

Page: 379 / 509

'12 • PAC-T-174
E8 Heating overload operation
Keeps flashing 1 time flash
Keeps flashing
Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
NO
YES
(2)
Is the air filter clogged?
Is the
indoor heat exchanger
temperature thermistor
connection OK?
Are the
characteristics of indoor
heat exchanger temperature
thermistor OK?
NO
Check the error data with the
remote controller.
YES
Is the unit
operating in the state of
heating overload?
Note (1) Judge if it is in the state of overload or not as follows.
�
Is there any short-circuit of air?
�
Isn’t there any fouling or clogging on the indoor heat exchanger?
�
Is the outdoor fan control normal?
�
Isn't the room and outdoor air temperature too high?
Note (2) For characteristics of indoor heat exchanger temperature thermistor,
see the error display E6.
YES
NO
YES
NO
Error stop
Reset
Indoor heat exchanger temperature (°C)
56 63
Wash.
Defective indoor heat
exchanger temperature
thermistor connector
➞
Correct.
Defective indoor heat
exchanger temperature
thermistor.
Check refrigerant system.
Adjust
2. Error detection method
Indoor heat exchanger
temperature thermistor (ThI-R1,
R2, R3)
3. Condition of Error displayed
When it is detected 5 times
within 60 minutes from initial
detection or when the overload
condition is detected for 6
minutes continuously.
4. Presumable cause
• Clogged air filter
• Defective indoor heat
exchanger temperature
thermistor connector
• Defective indoor heat
exchanger temperature
thermistor
• Anomalous refrigerant system
Note:
During heating operation; After starting compressor, compressor rotation speed is decreased by detecting indoor heat
exchanger temperature (ThI-R) in order to control high pressure.
Error code
Remote controller:
LED Green Red
Indoor
Outdoor
Content
-
378
-