Hitachi RAC-18SX8 Service Manual page 213

6. Failure phenomenon: The clean lamp is blinking (on for 1 second, dimmed for 1 second).
[Situation] The clean lamp is blinking (on for 1 second, dimmed for 1 second).
[Estimated failure locations] ・While the cleaner is running or the electrical dust collector is running,
the front panel remains open with the ion mist running.
[Diagnosis flow]
Initiating troubleshooting
Is the front panel securely closed?
Is the CN13 connector loose?
Or is there a wire break?
Replace the "detection switch for front panel open/closed states."
Yes
No
No
Set the front panel correctly.
Yes
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Correct the connector.