SiUS28-902_B
Troubleshooting by Indication on the Remote Controller
Service Diagnosis
103
3.12 Remote Sensor Abnormality
Remote
Controller
Display
C9
Applicable
Models
FTQ
Method of Error
Detection
The error is detected out by temperature detected by remote sensor.
Error Decision
Conditions
When the remote sensor becomes disconnected or shorted while the unit is running
Supposed
Causes
Defective indoor unit thermistor (R1T) for suction air
Defective indoor unit PCB
Troubleshooting
Refer to “Thermistor Resistance / Temperature Characteristics” table on P.161.
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 may
b
e damaged.
Set at 03.
Replace the indoor
u
nit PCB.
N
O
N
O
YES
YES
Replace the indoor
u
nit PCB.
Connect the sensor and t
u
rn O
N
again.
N
O
N
O
Replace the sensor.
YES
YES
Connector is
connected to X1
8
A
of the indoor
u
nit
PCB.
Is the optional remote
sensor is installed?
Field setting 10(20)-2
is set at 03.
Resistance
is normal
w
hen
meas
u
red after
disconnecting the
sensor from the indoor
u
nit PCB (7.2
~
112
)
