Depending on the Air Purifier model you have, you might see one or more of the following indicators or codes:

• Code: A
  Auto mode

• Code: C
  Gas mode (AC3254 and AC3256 only)

• Code: L
  Child lock on

• Code: UL
  Child lock off

• Code: F0
  Clean the pre-filter

• Code: A0 to A9
  Replace NanoProtect S3 HEPA filter

• Code C0 to C9:
  Replace NanoProtect S3 AC filter

• Code SL
  Sleep Mode

• Code 1h:
  Timer mode

• Code t:
  Turbo Mode.

• Error Code: Er
  The hall sensor is not working properly. Remove and then reattach the front panel If the error code "Er" still persists, we recommend that you contact us.

• Error code: E1 to E4
  The appliance has malfunctioned. In this case, we recommend that you contact us.