SiUS281117
Troubleshooting by Remote Controller
128
Service Diagnosis
2.20 Humidity Sensor System Abnormality
Remote
Controller
Display
CC
Applicable
Models
FCQ
Method of Error
Detection
The error is detected according to the humidity (output voltage) detected by humidity sensor.
Error Decision
Conditions
The error is generated when the humidity sensor becomes disconnected or shorted when the
unit is running.
Error code is displayed but the system operates continuously.
Supposed
Causes
Defective sensor
Broken wire
External factor (Noise, etc.)
Troubleshooting
Note:
1. To delete the record, the ON/OFF button of the remote controller must be pressed and held
for 5 seconds in the check mode.
2. To display the code, the Inspection/Test button of the remote controller must be pressed and
held in the normal mode.
3. If "
CC
" is displayed even after replacing the humidity sensor PCB (A2P) and taking the steps
1 and 2, replace the indoor unit PCB (A1P).
YES
NO
YES
NO
Remove the humidity sensor
from the indoor unit PCB and
insert it again.
It is normal.
(Poor connector contact)
Replace the humidity sensor PCB
(A2P).(
∗
3)
It is believed that external factors
(noise or else) other than failure
caused the error.
Does it function
normally?
Error is displayed again.
(
∗
2)
Delete the error code record
from the remote controller. (
∗
1)
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Caution
