Humidity Sensor (For Humidifying) / Humidifying Thermistor Abnormality - Daikin FTXZ25NV1B Service Manual

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