Damper Abnormality - Daikin CTXU25G2V1B Service Manual

SiBE12-908
2.24

Damper Abnormality

H1
Remote
Controller Display
Outdoor Unit LED A5
Display
Method of Detected by the limit switch (LS) in the humidification unit.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Service Diagnosis
55
Limit switch does not turn on or off when the operation of humidification unit starts or
finishes. For example, when turning on the power supply, when humidification operation
(including air intake) starts.
Faulty damper operation due to frost
Faulty damper operation due to foreign material
Limit switch fault (including improper connection)
Defective motor for damper
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Is the damper fixed
due to frost?
NO
Is the wire connection
of limit switch (LS)
loosen?
NO
Is there any foreign
material in the
damper unit?
NO
YES
Heat the damper unit and
melt frost
Is the damper fault
repeated?
YES
YES
YES
Troubleshooting
NO
OK
(Check intake air and
humidification unit for direct
sucking of moisture.)
Reconnect wires.
Remove the foreign
material.
Replace the damper unit
(replacement of the limit
switch only is impossible)
or, replace the outdoor unit
PCB.
(R9444)
135