Check oil level and add if necessary. If Sight Glass has MIN and MAX marks, the oil level should be at least halfway between the two marks. If no marks exist, the oil level should be half way at MIN to 3/4 at MAX when viewing the Sight Glass.

Check for air leaks on the compressor, tubing, and connections.

Check Air Intake Filters for blockage, dust, etc. Keep compressor clean and dust free.

Check Cooling Fans and fan blades for blockage, dust, etc. (Cooling Fans are to help keep the heads cool during operation.)

With the compressor running, look at the Coalescing Filter's Differential Pressure Indicator -- GREEN is good, and RED means that the Coalescing Filter is ready to be replaced.

Check the Moisture Indicator. For Dry Air, the color must be Blue; Pink means that the Desiccant Drying Chamber must be serviced or replaced. (Service Tip: If the Desiccant Drying Chamber needs to be replaced, then replace the Moisture Indicator at the same time in order for the dental delivery unit to function properly.)

Replace the Coalescing Filter Element. At the same time, clean the Coalescing Filter's Bowl and check the Float for proper functioning. Note that some fluid will remain until it reaches the level to be expelled.

Replace the Air Intake Filter Element or Assembly.

Change the oil in the compressor to ensure continued smooth operation.

Check the dental delivery unit's Air Filters: If filter is yellowish in color, check the Coalescing Filter's Differential Pressure Indicator and Coalescing Filter Assembly & Bowl as noted above.

Check for moisture in the J-box/unit's Air Filters. If moisture is found, check the Moisture Indicator as noted above.

The compressor must cycle ON at 80 PSI and OFF at 100 PSI in order for the dental delivery unit to function properly. Use the compressor Pressure Gauge to confirm this and adjust the Pressure Switch if necessary.

Check for minimum air pressure of 80 PSI and a maximum of 100 PSI at the J-box. (Service Tip: Use a handpiece and let the air compressor cycle at least once before making adjustments to the J-box air regulator.)