Specifications

SiUS12-928_A Troubleshooting
Service Diagnosis 134
Troubleshooting
Check No.06
Refer to P.152
H9 : Outdoor temperature thermistor
J3 : Discharge pipe thermistor
J6 : Outdoor heat exchanger thermistor
J8 : Liquid pipe thermistor
J9 : Gas pipe thermistor
P4 : Radiation fin thermistor
Note: For 3MXS24JVJU
The short thermistors which locate near the connectors [S92] and [S93] each are indispensable for
control. When you check the liquid pipe thermistors or the gas pipe thermistors, check the short
thermistor also.
(R7176)
Caution
NO
YES
YES
NO
NO
YES
Turn on the power again.
Normal?
Reconnect the connectors
or thermistors.
J3 error: the discharge
pipe temperature is
lower than the heat
exchanger
Replace defective one(s) of
the following thermistors.
 Radiation fin thermistor
 Discharge pipe thermistor
 Outdoor heat exchanger
thermistor
 Liquid pipe thermistor
 Gas pipe thermistor
 Outdoor temperature
thermistor
 Indoor heat exchanger
thermistor
Cooling: Outdoor heat
exchanger
thermistor
Heating: Indoor heat
exchanger
thermistor
Replace the following
thermistor.
Replace the outdoor unit
PCB.
(Replace the indoor unit
PCB.)
Error displayed
again on remote
controller?
Indoor heat
exchanger thermistor
functioning?
Check No. 06
Check the thermistor resistance
value.
Check No. 06
Check the indoor heat exchanger
thermistor resistance value in the
heating mode.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
[S92], [S93]
Short thermistor
(R11408)