Service manual

SiUS041111 Troubleshooting
Service Diagnosis 97
Troubleshooting
Check No.01
Refer to P.116
Check No.12
Refer to P.118
Check No.14
Refer to P.119
Replace the defective
thermistor.
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.
Check No. 01
Check the thermistors.
Check No. 12
Check the electronic
expansion valve.
(R14412)
Caution
NG
OK
OK
OK
NG
NG
• Refrigerant shortage
• Four-way valve
• Water mixed
• Stop valve
• Discharge pipe thermistor
• Outdoor heat exchanger thermistor
• Outdoor temperature thermistor
Check No. 14
Check the refrigerant
line.