SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
119
3.24 Outdoor Air Thermistor Abnormality
Remote
Controller
Display
H9
Applicable
Models
RZR, RZQ
Method of Error
Detection
The error is detected from the temperature detected by the outdoor air thermistor.
Error Decision
Conditions
When the outdoor air temperature thermistor has short circuit or open circuit
Supposed
Causes
Defective thermistor (R1T) for outdoor air
Defective outdoor unit PCB (A1P)
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.161.
Connector
is connected to
X11A of o
u
tdoor
u
nit PCB
(A1P).
Resistance
is normal
w
hen
meas
u
red after
disconnecting the
thermistor (R1T) from the
o
u
tdoor
u
nit PCB
(3.5
κΩ
to
360
κΩ
)
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 connector and t
u
rn
O
N
again.
Replace the thermistor (R1T).
N
O
YES
N
O
YES
