Daikin REYQ8-48PY1B - 3.32 “J6” Outdoor Unit: Malfunction of Thermistor (R4 T or R12 T) for Outdoor Unit Heat Exchanger

Troubleshooting by Indication on the Remote Controller SiBE37-701_B
299 Troubleshooting
Troubleshooting
∗
Refer to “Thermistor Resistance / Temperature Characteristics” table on P450.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Connect the service checker.
Press reset and start operation
again.
Check if discharge
pipe thermistor
property is normal.
(
∗
1)
YES
Replace the discharge pipe
thermistor.
Connect the service checker to compare the
temperature of discharge pipe by using service
checker with actual measurement value of discharge
pipe thermistor (Refer to
∗
1).
Service Checker
Check if temperature of
discharge pipe by using
service checker is the same
with actual measurement
value of discharge pipe
thermistor.
· Discharge pipe thermistor is normal and the
temperature detection of the main PCB is also normal.
· Actually the temperature of discharge pipe is high.
Check 3 Remove the factor of overheat operation
referring to P.383.
∗
1: Compare the resistance value of discharge pipe thermistor and the value based on the surface
thermometer.
(Refer to P.450 for the temperature of thermistor and the resistance property)
NO
NO
Replace the main PCB
(A1P).