Service Manual

SiUS091133 Troubleshooting
Service Diagnosis 122
Troubleshooting
Check No.01
Refer to P.142
Check No.12
Refer to P.144
Check No.14
Refer to P.145
(R15825)
Caution
NG
OK
OK
OK
NG
NG
* Discharge pipe thermistor
* Outdoor heat exchanger thermistor
* Outdoor temperature thermistor
* Refrigerant shortage
* Four-way valve
* Water mixed
* Stop valve
Check No. 01
Check the thermistors.
Check No. 14
Check the refrigerant line.
Check No. 12
Check the electronic
expansion valve.
Replace the defective
thermistor(s).
Replace the electronic
expansion valve or the coil.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.