Specifications

Troubleshooting SiBE04-624
176 Service Diagnosis
2.26 Damper Fault
Remote
Controller Display
H1
Outdoor Unit LED
Display
A5 55
Method of
Malfunction
Detection
Detected by the limit switch (LS) in the humidification unit.
Malfunction
Decision
Conditions

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, or when inner heating dry cleaning starts.
Supposed
Causes

Faulty damper operation due to frost

Faulty damper operation due to foreign material

Limit switch fault (including improper connection)

Defective motor for damper
Troubleshooting
OK
(Check intake air and
humidification unit for direct
sucking of moisture.)
Reconnect wires.
Replace the damper unit
(replacement of the limit
switch only is impossible)
or, replace the outdoor unit
PCB.
Is the damper fixed
due to frost?
(R3435)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Heat the damper unit and
melt frost
Is the damper fault
repeated?
NO
YES
YES
Is the wire
connection of limit switch
(LS) loosen?
NO
NO
YES