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13
PROBABLE CAUSE
Possible defective safety relief valve.
Excessive air tank pressure.
PROBABLE CAUSE
Fittings are not tight enough.
PROBABLE CAUSE
Defective or rusted air tank.
TROUBLESHOOTING
REMEDY
Operate safety relief valve manually by pulling on ring.
If it still leaks, it should be replaced.
Defective motor/pressure switch. Replace.
REMEDY
Tighten fittings where air can be heard escaping. Check
fittings with soapy water solution. Do not overtighten.
REMEDY
Air tank must be replaced. Do not attempt to repair
air tank!
Symptom 5. Air leaks from safety relief valve.
Symptom 6. Air leaks at fittings.
Symptom 7. Air leak in air tank.
PROBABLE CAUSE
Pressure regulator knob not turned to high enough
pressure or defective pressure regulator.
Restricted air intake filter.
Air leaks.
Air compressor is not large enough for air
requirement.
REMEDY
Adjust pressure regulator knob to proper setting or
replace.
Clean.
Check for leaks and repair.
Check the accessory air requirement. If it is higher than
the CFM or pressure supply of the air compressor, you
need a larger air compressor.
Symptom 9. Insufficient pressure at air tool or accessory.
PROBABLE CAUSE
Damaged inlet (reed) valve.
REMEDY
Contact SENCO Customer Service 888-222-8144.
Symptom 8. Air blowing from inlet filter.
14
PROBABLE CAUSE
Restricted air intake filter.
Defective (reed) valve.
REMEDY
Clean.
Drain air tank and measure pump up time. Compare to
specifications. If lower, remove pump head and inspect
valve plate, clean or replace.
Symptom 10. Air compressor not making enough air.
Symptom 11. Moisture in discharge air.
PROBABLE CAUSE
Condensation in air tank caused by high level
of atmospheric humidity or air compressor is
not run long enough.
REMEDY
Drain air tank after every use. Drain air tank more often
in humid weather and use an air line filter.