Daikin RZQG71L9V1, Service Manual

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Troubleshooting by Remote Controller ESIE15-13C
154 Service Diagnosis
4.22 Thermistor System Abnormality
Remote
Controller
Display
H9
,
J3
,
J5
,
J6
,
J7
,
J8
Applicable
Models
RZQG
Method of Error
Detection
The error is detected according to the temperature detected by each individual thermistor.
Error Decision
Conditions
When thermistor is disconnected or short circuited during operation
Supposed
Causes

Defective thermistor
 Defective connection of connector
 Defective outdoor unit PCB (A1P)
Troubleshooting
Refer to P.185.
Error Code Defective Thermistor Symbol
H9
Outdoor air thermistor R1T
J3
Discharge pipe thermistor R2T
J5
Suction pipe thermistor R3T
J6
Heat exchanger thermistor R4T
J7
Intermediate heat exchanger thermistor R5T
J8
Liquid pipe thermistor R6T
Connect correctly.
Is it normal?
Replace the outdoor unit PCB
(A1P).
NO
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Remove thermistor from outdoor unit
PCB, then measure the resistance
using a tester.
Check connectors for connection.
YES
Replace the thermistor.
Is it normal?
NO
YES
CHECK 1
CHECK 1