Specifications

SiUS12-928_A Troubleshooting
Service Diagnosis 122
Troubleshooting
Check No.05
Refer to P.151
Check No.06
Refer to P.152
Check No.11
Refer to P.155
NG
OK
NO
OK
NG
OK
YES
NG
Correct it.
Reconnect it.
YES
YES
YES
NO
NO
Replace the four way valve
coil.
NO
Replace the outdoor unit
PCB.
• Water mixed
• Stop valve
Replace a defective
thermistor.
Refer to the refrigerant line
check procedure.
Replace the four way valve.
(defective or dust-clogged)
Reconnect them in position.
Caution
(R11931)
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Four way valve coil
disconnected (loose)?
Harness out of connector?
Any thermistor
disconnected?
Check No. 06
Check the thermistors.
Check No. 11
Check the refrigerant
line.
Check No. 05
Check the four way valve
switching output.
Resistance
between harnesses about
1000 ~ 2000 Ω?
Check the continuity of the four way
valve coil and harness.
Disconnect the harness from the
connector.