
Troubleshooting SiBE04-624_B
118 Service Diagnosis
2.31 Damper Abnormality
Error Code
H1
Method of Error
Detection
Detected by the limit switch (LS) in the humidifier unit.
Error Decision
Conditions
Limit switch does not turn on or off at the following timing
* The humidifier unit starts. (When the power supply turns on, humidifying operation starts)
* The humidifier unit stops.
Supposed
Causes
Frost
Foreign matter
Defective limit switch (including improper connection)
Defective damper motor
Troubleshooting
Is the damper fixed
due to frost?
(R13924)
Caution
Heat the damper unit and
melt frost.
Error again?
NO
YES
YES
Is the wire connection
of limit switch (LS)
loosen?
NO
NO
YES
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
OK
(Check intake air and
humidifier unit for direct
sucking of moisture.)
Reconnect the wires.
Replace the limit switch
(damper unit) or replace the
outdoor unit PCB.
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