Daikin 2MXL18WMVJU9 User Manual

Troubleshooting for Wall Mounted/Floor Standing Type SiUS122226E
162 Part 6 Service Diagnosis
Reference
5.4 Thermistor or Related Abnormality
Error Code C4, C9
Method of Error
Detection
The temperatures detected by the thermistors determine thermistor errors.
Error Decision
Conditions
The voltage between the both ends of the thermistor is either 4.96 V or more, or 0.04 V or less with
the power on.
Supposed
Causes
 Disconnection of connector
 Defective thermistor(s)
 Defective indoor unit PCB
Troubleshooting
C4 : Indoor heat exchanger thermistor
C9 : Room temperature thermistor
Check No.01 Refer to P.224
YES
(R21870)
NO
Check No. 01
Check the thermistor resistance
value.
YES
NO
Caution
Correct the connection.
Replace the defective
thermistor(s).
Replace the indoor unit PCB
(control PCB).
Normal?
Normal?
Check the connection of
connectors.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

Daikin 2MXL18WMVJU9 Specifications

General

Brand	Daikin
Model	2MXL18WMVJU9
Category	Air Conditioner
Language	English