Outdoor Unit Heat Exchanger Thermistor Abnormality - Daikin SkyAir RZQ-P Series Service Manual

Troubleshooting by Indication on the Remote Controller

3.27 Outdoor Unit Heat Exchanger Thermistor Abnormality

J6
Remote
Controller
Display
Applicable RZR, RZQ
Models
Method of Error
The error is detected from the temperature detected by the heat exchanger thermistor.
Detection
Error Decision
When a short circuit or an open circuit in the heat exchanger thermistor is detected
Conditions
 Defective thermistor (R4T) for outdoor unit heat exchanger
Supposed
 Defective outdoor unit PCB (A1P)
Causes
Troubleshooting
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.161.
122
Be sure to turn off the power switch before connecting or disconnecting
Caution the connector or parts may be damaged.
Connector
is connected to
NO
X12A of outdoor unit PCB
(A1P).
YES
Resistance
is normal when
measured after
NO
disconnecting the
thermistor (R4T) from the
outdoor unit PCB
(3.5kW ~
360kW)
YES
SiUS28-902_B
Connect the connector and turn
ON again.
Replace the thermistor (R4T).
Replace the outdoor unit PCB
(A1P).
Service Diagnosis