Ground - Mitsubishi Electric City Multi PUMY-SP112VKM Technical & Service Manual

Check code
1102
(U2)
Abnormal points and detection methods
(1) Abnormal if TH4 falls into following temperature conditions;
●exceeds 105 [221°F] continuously for 5 minutes
●exceeds 115 [239°F]
TH4: Thermistor <Compressor>
LEV: Linear expansion valve
●Diagnosis of defectives
Make sure to turn the power OFF before connecting/disconnecting any connectors, or replacing boards.
Is 5101 displayed when restarted?
Is the outdoor stop valve (liquid/gas)
Is there a refrigerant leak?
Check the connection for thermistor wiring
and indoor controller board connector.
Is there any abnormality on
connectors/wires such as a disconnection,
half-disconnection or breakage?
Continue to the next page
OCH668B
Compressor temperature trouble
Diagnosis
(5101)
(1102)
No
fully open?
Yes
(no leak)
No
No
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.)
Yes Refer to the diagnosis of check code 5101.
Open the stop valve (liquid/gas) fully.
No
Repair the refrigerant leakage.
Yes
Connect the connector properly
Yes
(Repair or replace it in case of a breakage).
51
Chart 1 of 2
Remedy