Daikin B-Series Service Manual page 135

Troubleshooting
Troubleshooting
Check No.05
Refer to P.143
Check No.06
Refer to P.144
Check No.11
Refer to P.147
124
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
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
3kΩ±0.5kΩ?
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
Insufficient gas
Water mixed
Stop valve defective
Si04-306E
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