SiUS28-902_a
Troubleshooting by Indication on the Remote Controller
Troubleshooting
116
3.25 “
J6
” Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger
Remote
Controller
Display
J6
Applicable
Models
RZQ18~30PVJU
Method of
Malfunction
Detection
Malfunction is detected from the temperature detected by the heat exchanger thermistor.
Malfunction
Decision
Conditions
When a short circuit or an open circuit in the heat exchange thermistor is detected.
Supposed
Causes
Defect of thermistor (R4T) for outdoor unit heat exchanger
Defect of outdoor unit P.C.B. (A1P)
Troubleshooting
Refer to
Thermistor Resistance / Temperature Characteristics
table on P.166
Caution
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 co
u
ld
b
e damaged.
Resistance
is normal
w
hen
meas
u
red after
disconnecting the thermistor
(R4T) from the o
u
tdoor
u
nit P.C.B.
(3.5k
Ω
~
360k
Ω
)
Replace the o
u
tdoor
u
nit P.C.B.
(A1P).
Connect the thermistor and t
u
rn
on again.
N
O
N
O
Replace the thermistor (R4T).
YES
YES
Connector
is connected to o
u
tdoor
u
nit P.C.B.
(A1P).
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