If you are reading this post, you are almost certainly the owner or user of a compressor and are, directly or indirectly, aware that it comes with an operating and maintenance manual.
This post is devoted only to the part covering the activities every compressor user should carry out between two visits from an authorised service – that is, between two “regular services” or two regular preventive maintenance visits.
Below are the checks that owners/users of screw compressors should carry out to ensure a long and reliable compressor life.
01Temperature in the compressor room
Simply placing a thermometer in the room gives you an easy daily view of the temperature in the compressor room. Compare the readings with the reference values in the operating manual, and if the temperature is higher, improve the ventilation of the compressor room. Record the ambient temperature.
02Compressor oil level
The sight glass has a line indicating the normal oil level. If the level is low, top up the oil and record it. (Note: always top up with the same type of oil already in the compressor!)
03Panel (mat) filters
Check how dirty the panel filters are. If they are dirty, blow them out or vacuum them.
04Coolers
Check how dirty the coolers are and blow out, clean or vacuum them as needed.
Cooler pre-filters (if fitted)
If the compressor coolers have pre-filters, check how dirty they are and blow them out and/or vacuum them as needed.
05Drive belts / couplings
Depending on the drive type, check the condition of the belts (belt-driven models) or couplings (direct or gear-driven models). If you notice cracks or nicks, contact the service team. Check belt tension monthly and adjust it if needed according to the operating manual.
06Electrical cabinet
Make sure the compressor’s electrical cabinet is clean, with no dust, moisture or other dirt that could cause short circuits or poor contacts.
IMPORTANT: always disconnect the unit from the mains before inspecting the electrical cabinet!
07Condensate drains
Because they collect dirty condensate from the network, condensate drains can develop air “pockets” or become blocked by solid particles from the system. Press the “Test” button to release air pockets and check that the drain works properly. If the drain still does not work after testing, contact your dealer or authorised service.
08Operating cycles
Also pay attention to the compressor’s operating cycles. A low percentage of “LOAD” cycles can lead to increased water in the compressor oil, which can cause a failure. For advice on the optimal ratio of operating cycles, contact your dealer.
