OCH790 _34
1102 (U2): Compressor temperature trouble
Chart 1 of 2
Abnormal points and detection methods
•
TH4 falls into either of the following temperature condi-
tions:
- over 110°C [230°F] continuously for 5 minutes
- over 125°C [257°F]
• The saturation temperature converted from the pressure
detected by the high pressure sensor exceeds 40°C
[104°F] during defrosting, and TH4 exceeds 110°C
[230°F]
TH4:
Thermistor <Compressor>
LEV:
Linear expansion valve
Causes and checkpoints
•
Malfunction of stop valve
•
Over-heated compressor operation caused by shortage
of refrigerant
• Defective thermistor
•
Defective outdoor multi controller circuit board
• LEV performance failure
•
Defective indoor controller board
•
Clogged refrigerant system caused by foreign object
• Refrigerant shortage (Refrigerant liquid accumulation in
compressor while indoor unit is OFF/thermo-OFF.)
Diagnosis of failure
Check the connection for thermistor wiring and
indoor controller board connector.
Refer to the diagnosis of error code 5101.
Open the stop valve (liquid/gas) fully.
Repair the refrigerant leakage.
Connect the connector properly
(Repair or replace it in the case of breakage).
Continue to the next page.
No
(1102)
No
(no leak)
Yes
(5101)
No
Yes
Yes
Yes
No
Is there any abnormality on connec-
tors/wires such as disconnection,
half-disconnection or breakage?
Is there refrigerant leak?
Is the outdoor stop valve (liquid/gas)
fully open?
Is the error code 5101 displayed when
restarted?
