J8" Outdoor Unit: Malfunction Of Liquid Pipe Thermistor 2 (R7T) - Daikin RTSQ20PY1 Service Manual

SiBE31-801_C
J8
4.31 " " Outdoor Unit: Malfunction of Liquid Pipe
Thermistor 2 (R7T)
J8
Remote
Controller
Display
Applicable RTSQ8P~16P (Outdoor Unit), BTSQ20P (Function Unit)
Models
Method of Malfunction is detected according to the temperature detected by liquid pipe thermistor.
Malfunction
Detection
Malfunction When the liquid pipe thermistor is short circuited or open circuited.
Decision
Conditions
Supposed
Causes
Troubleshooting
∗
Troubleshooting
Faulty liquid pipe thermistor 2 (R7T)
Faulty outdoor unit PCB
Defect of thermistor connection
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is the connector for
liquid pipe thermistor
connected to X30A
on outdoor unit PCB
(A1P)?
YES
Is the resistance
measured after
removing the
thermistor (R7T) from
outdoor unit PCB
normal? (1.8kΩ to
800kΩ)
YES
Refer to "Thermistor Resistance / Temperature Characteristics" table on P.408.
Troubleshooting by Indication on the Remote Controller
NO
NO
Connect the connector and operate
unit again.
Replace the thermistor (R7T).
Replace the outdoor unit PCB
(A1P).
268