Daikin SkyAir RZR-P Series Service Manual page 184

Troubleshooting by Remote Controller
CHECK 5
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, see:
 "Wiring Diagrams'' on P.187
Overview of Thermistors
The table below contains an overview of the thermistors:
Indoor
FCQ FHQ FAQ FBQ
R1T
R2T
R3T
Outdoor
Checking
To check the thermistors, proceed as follows:
Step
Service Diagnosis
R1T R1T R1T
R2T R2T R2T
R3T R3T R3T
— — — R4T
— — — R5T
RZR18-30 RZR36·42
RZQ18-30 RZQ36·42
R1T R1T
R2T R2T
R3T, R5T R3T, R5T
R4T R4T
— R6T
— R7T
R10T FINTH
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 next pages.
FTQ Thermistor
— Suction air thermistor
R1T Heat exchanger liquid pipe thermistor
R2T Heat exchanger gas pipe thermistor
— Discharge air thermistor
— NTC thermistor
Thermistor
Outdoor air thermistor
Discharge pipe thermistor
Suction pipe thermistor
Heat exchanger thermistor
Subcooling heat exchanger thermistor
Liquid pipe thermistor
Radiation fin thermistor
SiUS281117
Table
(on following page)
2
2
2
3
2
Table
(on following page)
2
3
2
2
2
2
1
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