SiBE12-908 Troubleshooting
Service Diagnosis 142
2.24 Damper Abnormality
Remote
Controller Display
H1
Method of
Malfunction
Detection
Detected by the limit switch (LS) in the humidifier unit.
Malfunction
Decision
Conditions
Limit switch does not turn on or off when the operation of humidifier unit starts or finishes.
For example, when turning on the power supply, when humidification operation (including air
supply ventilation) 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
(R10339)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is the damper fixed
due to frost?
YES
Heat the damper unit and
melt frost
(Check intake air and
humidifier unit for direct
sucking of moisture.)
NO
Is the damper fault
repeated?
YES
NO
OK
Reconnect wires.
Is the wire connection
of limit switch (LS)
loosen?
YES
NO
Replace the limit switch or
replace the outdoor unit
PCB.
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