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SiUS30-1301
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
195
3.26 Thermistor System Abnormality
Error Code
J3
,
J4
,
J5
,
J7
,
J9
Applicable
Models
RWEYQ72P, 84P
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 connection of thermistor
Defective thermistor
Defective condensing unit PCB
Troubleshooting
Note:
1.Error code and thermistor
Connect correctly.
Is it normal?
Replace the condensing
u
nit
PCB (A1P).
N
O
Caution
Remo
v
e thermistor from
condensing
u
nit PCB, then
meas
u
re the resistance
u
sing a
tester.
Check connectors for thermistor.
YES
Replace the thermistor (
*
1).
Is it normal?
N
O
YES
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Error
Code
Thermistor
Electric
Symbol
Connector
RWEYQ72/84PTJU
RWEYQ72/84PTJU9
RWEYQ72/84PYDN
J3
Discharge pipe thermistor
R3T
X34A
X29A
J4
Heat exchanger gas pipe thermistor
R4T
X37A
X30A
J5
Suction pipe thermistor
R2T
X37A
X30A
J7
Receiver outlet liquid pipe thermistor
R6T
X37A
X30A
J9
Subcooling heat exchanger outlet pipe thermistor
R5T
X37A
X30A
CHECK 11