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SiMT041311E
Troubleshooting
Service Diagnosis
140
2.13 Humidity Sensor (for Humidifying) / Humidifying
Thermistor Abnormality
Error Code
CA
Method of Error
Detection
The humidity detected by the humidity sensor determine humidity sensor errors.
Error Decision
Conditions
The input from the humidity sensor is 4.96 V and more or 0.04 V and less during compressor
operation.
Supposed
Causes
Disconnection of connector
Defective humidity sensor
Defective indoor unit PCB (A1P, A5P)
Troubleshooting
Check No.01
Refer to P.181
Check No.07
Refer to P.182
YES
NO
Check No. 07
Check the input voltage of
humidity sensor.
YES
NO (100
Ω
or less)
Caution
Correct the connection.
Replace the humidity sensor
PCB (A5P).
Normal?
Normal?
(R19726)
Check No. 01
Check the thermistor resistance
value.
YES
NO
Replace the humidity sensor
PCB (A5P).
Replace the control PCB (A1P).
Normal?
Check the connection of
connectors.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
* Connect the connector again for
ensuring the connection.