Applicable Systems
ASD/BS Series
Symptoms
The air intake filter differential pressure switch has activated, indicating a clogged filter element. The alarm reminds the operator to service the filter.
Possible Causes
- Air intake filter element saturated with dust after extended operation
- High ambient dust level causing rapid filter clogging
- Filter housing gasket leak allowing unfiltered air to bypass the element
Troubleshooting Steps
- Step 1: Check the filter service hours on the controller against the maintenance schedule
Replace the filter if hours exceed 2000 or the differential alarm is active - Step 2: Inspect the filter element for tears, collapse, or oil saturation
Replace with a genuine OEM element if damage is found - Step 3: Check the filter housing gasket for compression set or damage
Replace the gasket if air bypass is detected using a smoke test
How to Reset
Reset: Replace the filter element and reset the service timer on the controller.
Common Replacement Parts
- Air intake filter element: Dry-type, high-efficiency (Match part number to compressor model)
- Filter housing gasket: Closed-cell foam, adhesive-backed (Cut to size if OEM gasket unavailable)
Frequently Asked Questions
- Q: Can I clean and reuse the filter?
Some heavy-duty panel filters can be cleaned 2-3 times with compressed air. Paper cartridge filters must always be replaced.
- Q: What happens if the filter is not replaced?
Restricted intake causes the compressor to work harder, increasing energy cost and risking vacuum damage to the air end seals.
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Source: Service Manual
Category: Compressor
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