Fujitsu AW Z24LBC Series Service Instruction page 29

5. OPERATING FUNCTION
- UV filter cleaning function
UV LED is turned on during the filter cleaning operation to remove bacteria or to deodorize.
< Condition to light up UV-LED >
UV-LED is lighted up after 5 seconds of starting the filter cleaning operation.
If error is occurred during the filter operation, it is turned off.
6. PROTECTING FUNCTIONS
(1) Automatic filter retracting function
Under following conditions, the filter moves toward retracting direction until the limit switch
turns OFF.
- The limit switch is kept ON for 2 seconds when the power is turned on.
- The limit switch turns ON from OFF and it is kept ON for 2 seconds when the air conditioner
is in operating or stop mode.
> If the air conditioner is in operating mode, it does not stop the operation and functions the
filter.
(2) Filter mounting error protection
(a) Filter come out mounting error
(b) Filter retract mounting error
If above error occurs, it is memorized in EEPROM (Error history).
Error is indicated with blinking [MAINTENANCE SIGN] lamp (Red) for 1 sec. ON / 1 sec. OFF.
(3) Filter cleaning forced stop function when Dust box maintenance notification is in operation.
* When [MAINTENANCE SIGN] LED (Red) is ON, following functions do not work until reset
button will be pressed.
- Auto cleaning / Manual filter cleaning function
- Filter auto retract function
- Forced filter cleaning function, Off timer operating time auto cleaning.
* This protecting function can be released by pressing [MAINTENANCE/MANUAL AUTO]
button.
(4) Filter cleaning stepping motor temperature rise protection
Filter cleaning can be operated continuously up to 3 times.
(If it is operated 3 times continuously, it stops filter cleaning function for 3 minutes.)
(5) Forced filter cleaning protection for the continuous operation
When the operation time of air conditioner reaches to 200 hours, the operation is temporarily
stopped, and the filter cleaning is performed. Upon completion of the filter cleaning, it resumes
operation.
(6) Auto cleaning function protection for OFF Timer operating time
If the filter cleaning does not operate after 100 hours of air conditioner operating time and it is
reached to 150 hours, the filter cleaning function starts to operate at the time of stopping
operation by OFF Timer time up
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