PROBLEM:

Low pressure at point of use

Probable Cause: Remedial Action

Leaks in distribution piping: Check lines, connections and valves for leaks

Clogged filter elements: Clean or replace filter elements

Fouled dryer heat exchanger: Clean heat exchanger
Low pressure at compressor discharge: See below

PROBLEM:

Low pressure at compressor discharge

Probable Cause: Remedial Action

For systems with modulating load controls, improper adjustment of air capacity system:

Follow manufacturer's recommendation for adjustment of air capacity system

Worn or broken valves Improper air pressure switch setting:  Check valves and repair or replace as required

Follow manufacturer's recommendations for setting air pressure switch

Improper air pressure switch setting: Follow manufacturer's recommendations for setting air pressure switch

PROBLEM:

Water in lines

Probable Cause: Remedial Action

Failed condensate traps: Clean, repair, or replace the trap

Failed or undersized compressed air dryer: Repair or replace dryer.  If you do not have an Compressed Air Dryer, consider adding this equipment.

PROBLEM:

Liquid oil in air lines

Probable Cause:  Remedial Action

Faulty air/oil separation: Check air/oil separation system; change separator element

Compressor oil level too high:  Follow manufacturer's recommendation for proper oil level

PROBLEM:

Dirt, rust or scale in air lines

Probable Cause: Remedial Action

In the absence of liquid water, normal aging of the air lines: Install filters at point of use

PROBLEM:

Excessive service to load/hour ratio

Probable Cause: Remedial Action

System idling too much:

For multiple compressor system: consider sequencing controls to minimize compressor idle time

Adjust idle time according to manufacturer's recommendations

Improper pressure switch setting: Readjust according to manufacturer's recommendations

PROBLEM:

Elevated compressor temperature

Probable Cause: Remedial Action

Restricted air flow: Clean cooler exterior and check inlet filter mats

PROBLEM:

Restricted water flow

Remedial Action:

Check water flow, pressure, and quality; clean heat exchanger as needed

PROBLEM:

Low oil level

Remedial Action:

Check compressor oil level, add oil as required

PROBLEM:

Restricted oil flow

Remedial Action:

Remove restriction, replace parts as required

PROBLEM:

Excessive ambient temperature

Remedial Action:

Improper ventilation to compressor; check with manufacturer to determine maximum operating temperature

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