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Operation
2. To unlock the key pad, press and hold the QuietFlo
®
Main Filter Reset
key and the Fan Speed Control key simultaneously for 2-3 seconds. The
Keypad Locked Icon will disappear and the keypad will be functional.
Using the LCD Backlight
1. To turn on the LCD Backlight, press and hold the Pre-Filter and the
Main Filter keys for 3 seconds. To turn the LCD Backlight off, repeat the
process.
Locking/Unlocking the Keypad
Once you enter the desired speed, you may want to lock the keypad to prevent ac-
cidental changing of the speed. When the keypad is locked, all keys will be disabled.
If you press a key, the Keypad Locked Indicator will be displayed on the screen for
1-2 seconds.
1. To lock the keypad, press and hold the QuietFlo
®
Main Filter Reset key
and the Fan Speed Control key simultaneously for 2-3 seconds. The
Keypad Locked Icon will appear on the display. Refer to Fig. 9. After
releasing the keys, the Keypad Locked Icon will disappear.
Fig. 9
KEYPAD
LOCK ICON