J6" Outdoor Unit: Malfunction Of Thermistor (R4T) For Outdoor Unit Heat Exchanger - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
J6
3.25 " " Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger
J6
Remote
Controller
Display
Applicable RZQ18~30PVJU
Models
Method of
Malfunction is detected from the temperature detected by the heat exchanger thermistor.
Malfunction
Detection
Malfunction
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Decision
Conditions
 Defect of thermistor (R4T) for outdoor unit heat exchanger
Supposed
 Defect of outdoor unit P.C.B. (A1P)
Causes
Troubleshooting
Refer to Thermistor Resistance / Temperature Characteristics table on P.166
Troubleshooting
Be sure to turn off the power switch before connecting or disconnecting
Caution
the connector, or parts could be damaged.
Connector
is connected to outdoor
unit P.C.B.
(A1P).
YES
Resistance
is normal when
measured after
disconnecting the thermistor
(R4T) from the outdoor
unit P.C.B.
(3.5kΩ~
360kΩ)
YES
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the thermistor and turn
on again.
Replace the thermistor (R4T).
Replace the outdoor unit P.C.B.
(A1P).
116