Daikin FTXG20LV1BW Service Manual page 85

SiBE041401E
Troubleshooting
Check No.01
Refer to P.93
Check No.12
Refer to P.94
Check No.13
Refer to P.95
Check No.14
Refer to P.95
Note: OL (Q1L) activating temperature: 120°C
OL (Q1L) recovery temperature: 95°C
Service Diagnosis
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Discharge
pipe thermistor
disconnected?
NO
Check No. 01
Check the thermistors.
OK
Connectors are
properly connected?
YES
Disconnect the connector S40
from the PCB.
Resistance
Check the
resistance between
the 2 terminals on the
connector S40.
Nearly 0 Ω
Check No. 12
Check the electronic
expansion valve.
OK
Check No. 13
Check the four way
valve.
OK
Check No. 14
Check the refrigerant
line.
OK
YES
NG
∗ Discharge pipe thermistor
NO
∗ Connector S40
∗ 2 terminals of OL (Q1L)
∞
Disconnect the 2 terminals of
the OL (Q1L).
Check the
resistance between the
2 terminals of the OL
(Q1L).
Nearly 0 Ω
NG
NG
NG
∗ Refrigerant shortage
∗ Water mixed
∗ Stop valve
Troubleshooting
Insert the thermistor in
position.
Replace the discharge pipe
thermistor.
Connect the connectors
properly.
Resistance
∞
Replace the OL (Q1L).
Replace the OL harness.
Replace the electronic
expansion valve or the coil.
Replace the four way valve
or the coil.
Replace the outdoor unit
PCB.
Refer to the refrigerant line
check procedure.
Replace the outdoor unit
PCB.
(R19528)
74