Hitachi RAC-18SX8 Service Manual page 215

7.Failure phenomenon: The air purification lamp is blinking (on for 4 seconds, off for 1 second).
[Situation] The air purification lamp is blinking (on for 4 seconds, off for 1 second).
The ion mist unit is not functioning.
The self-diagnosis memory stores "timer lamp blinked 11 times."
[Estimated failure locations] ・Dirt on the discharge electrode for ion mist and on the discharge
[Cautions] The self-diagnosis (failure detection) for the ion mist unit is conducted with the timing for the
high-voltage generator to start running when set to "dirt monitoring," "air purification," or
"ion mist."
When touching the electrodes or high-voltage generator, be sure to turn off the power and
guard against electric shocks.
[Diagnosis flow]
Initiating troubleshooting
Is the discharge electrode for ion mist or the
discharge electrode for dust collection covered
with dust, dirt, or other foreign matter?
Is the CN14 connector loose?
Or is there a lead wire break?
Replace the "ion mist unit."
electrode for dust collection
・CN14 connector loose, lead wire break
・High-voltage generator out of order
No
No
– 248 –
Yes
Clean the electrodes.
Yes
Correct the connector.