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SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
121
3.26 Suction Pipe Thermistor Abnormality
Remote
Controller
Display
J5
Applicable
Models
RZR, RZQ
Method of Error
Detection
The error is detected from the temperature detected by the thermistor for suction pipe 1, 2.
Error Decision
Conditions
When a short circuit or an open circuit in the thermistor for suction pipe 1, 2 are detected
Supposed
Causes
Defective thermistor (R3T, R5T) for outdoor unit suction pipe
Defective outdoor unit PCB (A1P)
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.161.
Connector of
the thermistor for
s
u
ction pipe1, 2 is
connected to o
u
tdoor
u
nit PCB (A1P).
Resistance
is normal
w
hen
meas
u
red after
disconnecting the
thermistor (R3T, R5T) from
the o
u
tdoor
u
nit PCB
(3.5k
W
~
360k
W
)
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector or parts may
b
e damaged.
Caution
Replace the o
u
tdoor
u
nit PCB
(A1P).
Connect the thermistor and t
u
rn
O
N
again.
Replace the thermistor (R3T, R5T).
N
O
YES
N
O
YES