Check - Daikin RZQ Series FCQ20EVA Service Manual

SiME281501E

4.46 Check

CHECK 1

Check the Thermistors
Thermistors
If the cause of the problem is related to the thermistors, then the thermistors should be checked prior to
changing the PCB.
For more information about these thermistors, refer to:
 "Wiring Diagrams'' on P.167.
 "Functions of Main Components and Thermistors" on P.20.
Overview of Thermistors
The table below contains an overview of the thermistors:
Indoor
FCQ
R1T
R2T
—
—
Outdoor
Checking
To check the thermistors, proceed as follows:
Step Action
1 Disconnect the thermistor from the PCB
2 Read the temperature and the resistor value.
3 Check if the measured values correspond with the values in the table on the following pages.
Service Diagnosis
FBQ
R1T Suction air thermistor
R2T Heat exchanger thermistor
R3T Discharge air thermistor
R5T NTC thermistor
RZQ
R1T Outdoor air thermistor
R2T Discharge pipe thermistor
R3T Suction pipe thermistor
R4T Heat exchanger thermistor
R5T Intermediate heat exchanger thermistor
R6T Liquid pipe thermistor
R10T Radiation fin thermistor
Troubleshooting by Remote Controller
Thermistor
Thermistor
Table (on following page)
2
2
3
2
Table (on following page)
2
3
2
2
2
2
1
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