Thermistor System Abnormality - Daikin RZQG71~140L7V1B 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  Defective thermistor
Causes  Defective connection of connector
 Defective outdoor unit PCB (A1P)
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.241.
210
NO
NO
Defective Thermistor
Connect correctly.
Replace the thermistor.
Replace the outdoor unit PCB
(A1P).
Symbol
R1T
R2T
R3T
R4T
R5T
R6T
ESIE12-06
Service Diagnosis