Daikin FTXS09HVJU Service Manual page 127

SiUS04-904
Troubleshooting
Check No.05
Refer to P.145
Check No.06
Refer to P.146
Check No.11
Refer to P.149
116
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts damage may occur.
Four-way valve
coil disconnected (loose)?
NO
Harness out of
connector?
NO
Check the continuity of the four-way
valve coil and harness.
Disconnect the
`harness from the
connector.
Resistance between
harnesses about
3κΩ±0.5κΩ
?
YES
Check No.
05
Check the four-way valve
switching output.
Functioning
Any thermistor
disconnected?
NO
Check No. 06
Check the thermistors.
Functioning
Check No. 11
Check the refrigerant line.
Functioning
YES
YES
NO
Malfunctioning
YES
Malfunctioning
Malfunctioning
Refrigerant shortage
Water mixed
Stop valve defective
Troubleshooting
Correct.
Reconnect.
Replace the four-way valve
coil.
Replace the outdoor unit
PCB.
Reconnect in position.
Replace a defective
thermistor.
Refer to the refrigerant line
check procedure.
Replace the four-way valve
(defective or dust-clogged).
(R7345)
Service Diagnosis