SDI-W
Feb ‘19
- 16 -
Trouble Shooting Guide
The ‘Conditions’, ‘Causes’, and ‘Suggested Corrections’ as indicated below and on the following page(s) are only
a guideline for failures that we have found to be most common.
Though this information is provided in this booklet, it is assumed and expected that any personnel involved in the
servicing of an Air Compressor Unit is knowledgeable with this type of equipment. Do not attempt to service a
Compressor Unit unless you are familiar with it, as there are many issues that may come into play, the most
important being personal safety and the welfare of the Unit.
Should you have any questions, or require servicing to your Unit, please contact your local DV Systems
Distributor.
Condition:
Cause:
Suggested Correction:
A. Unit won’t start.
No power to the Unit.
Loose and/or missing wires in the electrical
circuit.
Starter Overload is tripped.
Pressure may not be low enough in the
Tank to allow the Unit to start.
Check that power at the disconnect or breaker
is on. Also, check any fuses.
Check that all wiring connections are tight.
With a wiring schematic, check that all wiring is
present and correct.
Reset the overload in the Magnetic Starter.
Drop pressure below the Pressure Switch ‘cut-
in’ pressure.
B. No or Insufficient Air
Flow.
Air Filter is dirty.
Loose Belts.
Pump Valves, Aftercooler, or Tank Check
Valve leaking, sticking, or plugged.
Air leaks at Compressor in in piping system.
Unit is too small for the compressed air
requirements.
Replace the Air Filter.
Tighten as required. Do not over-tighten.
Clean or replace.
Fix leaks. Soap/water mixture will assist in
finding small leaks.
Contact your DV Systems Distributor for
assistance.
When servicing the Air Compressor, shut off all
power to the Unit, and drain it of air pressure.
