Thermistor System Abnormality - Daikin SkyAir GQI-Eco Series Service Manual

Troubleshooting by Remote Controller

4.20 Thermistor System Abnormality

H9, J3, J5, J6, J7, J8
Remote
Controller
Display
Applicable RZQG
Models
Method of Error The error is detected according to the temperature detected by each individual thermistor.
Detection
Error Decision When thermistor is disconnected or short circuited during operation
Conditions
Supposed
Causes
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Check connectors for connection.
Is it normal?
YES
Remove thermistor from outdoor unit
PCB, then measure the resistance
using a tester.
CHECK 1
Is it normal?
YES
Error Code
H9
Outdoor air thermistor
J3
Discharge pipe thermistor
J5
Suction pipe thermistor
J6
Heat exchanger thermistor
J7
Intermediate heat exchanger thermistor
J8
Liquid pipe thermistor
CHECK 1 Refer to P.165.
134
Defective thermistor
Defective connection of connector
Defective outdoor unit PCB (A1P)
NO
NO
Defective Thermistor
Connect correctly.
Replace the thermistor.
Replace the outdoor unit PCB
(A1P).
Symbol
R1T
R2T
R3T
R4T
R5T
R6T
SiBE281013
Service Diagnosis