Service manual

SiUS041111 Troubleshooting
Service Diagnosis 95
Troubleshooting
Check No.01
Refer to P.116
Check No.13
Refer to P.119
Check No.14
Refer to P.119
Replace the four-way valve
coil.
NO
Four-way valve coil
disconnected (loose)?
Harness out of connector?
Check the continuity of the
four-way valve coil and harness.
Disconnect the harness from the
connector.
Resistance between
harnesses about
1000 ~ 2000 W?
Check No. 13
Check the four-way valve
switching output.
Any thermistor
disconnected?
Check No. 01
Check the thermistors.
Check No. 14
Check the refrigerant
line.
NG
OK
NO
OK
NG
OK
YES
NG
Correct it.
Reconnect it.
YES
YES
YES
NO
NO
Replace the outdoor unit
PCB.
Replace the defective
thermistor.
Refer to the refrigerant line
check procedure.
Replace the four-way valve
(defective or dust-clogged).
Reconnect in position.
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(R14441)
* Refrigerant shortage
* Water mixed
* Stop valve