64", "65" Indoor Air Thermistor Error - Daikin RTSQ20PY1 Service Manual

Troubleshooting (Heat Reclaim Ventilation)
64 65
7.2 " ", "
Remote Error Code
Controller LCD
Display
Applicable Heat reclaim ventilation
Models
Method of Temperature detected by inside air temperature sensor is used to detect errors.
Malfunction
Detection
Malfunction When value detected by inside air temperature sensor is -40ºC or below (open circuit) or 70ºC
or higher (short-circuit).
Decision
Conditions
Supposed
Causes
Troubleshooting
Notes: *1: Malfunction code and thermistor
Malfunction
*2:
Refer to the thermistor temperature - resistance conversion table when measuring resistance.
335
" Indoor Air Thermistor Error
64 65
or Inspection OFF Unit No. Blinking
Defect of thermistor connection
Defect of thermistor
Faulty control PCB
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Check for the connector
Is connector connected
correctly?
YES
Remove the thermistor from
outdoor PCB, and measure
resistance.
Is thermistor normal?
(*2)
YES
Thermistor
code
64
Indoor air thermistor
65
Outdoor air thermistor
NO
NO
Symbol
R1T
R2T
SiBE31-801_C
Connect the connector
correctly.
Replace the indoor air
thermistor.
If there is no faulty contact,
replace the control PCB.
Troubleshooting