Daikin FTX20JV1B Service Manual page 82

Troubleshooting
Troubleshooting
Check No.01
Refer to P.85
Check No.13
Refer to P.88
Check No.14
Refer to P.88
71
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
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
1000 ~ 2000 Ω?
YES
Check No. 13
Check the four way valve
switching output.
OK
Any thermistor
disconnected?
NO
Check No. 01
Check the thermistors.
OK
Check No. 14
Check the refrigerant
line.
OK
YES
YES
NO
NG
YES
NG
NG
∗ Refrigerant shortage
∗ Water mixed
∗ Stop valve
SiBE041010EA
Correct the four way valve
coil.
Reconnect the harness.
Replace the four way
valve coil.
Replace the outdoor
unit PCB.
Reconnect the
thermistor(s).
Replace the defective
thermistor(s).
Refer to the refrigerant line
check procedure.
Replace the four way valve
(defective or dust-clogged).
(R15824)
Service Diagnosis