Pollution of the filter causes higher current drain. The device may be equipped with a sensor, which uses this effect to detect filter pollution.
If current drain is longer than 10 seconds greater than 90% of the overcurrent value, the device reports filter pollution an the red LED changes to triple blinking.
If subsequent current drain is longer than 10 seconds smaller than 90% of the overcurrent value, triple blinking of the red LED will be turned off.
If the red LED is triple blinking, the filter should be cleaned.
Options to adapt the device to customer specifications:
The device may be equipped with a sensor, which detects filter pollution.
Time span during current drain must be greater than 90% of the overcurrent value to report filter pollution, may be changed.
Time span during current drain must be smaller than 90% of the overcurrent value to leave filter pollution mode, may be changed.
Current threshold to detect filter pollution may be changed.
Filter pollution may be additionally reported by a logic output.
