TROUBLESHOOTING CHART
www.gastmfg.com
ISO 9001 & 14001 CERTIFIED
inc.
PART NO. 70 - 5105 G471PL (Rev A)
8
Low
High
Pump
Motor
Excess
Reason and remedy
Vacuum
Pressure
Vacuum
Pressure
Overheat
Overload
Noise
for problem.
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At Pump
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•
Filter dirty. Clean or replace.
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•
At pump
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•
Muffler dirty. Clean or replace.
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Valves dirty or valves bent.
Clean or replace.
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Worn diaphragm.
Repair or replace.
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Relief valve set too high.
Inspect and adjust.
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•
Relief valve set too low.
Inspect and adjust.
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•
At pump
At pump
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•
Plugged vacuum/pressure line.
Inspect and repair.
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At pump
Collapsed vacuum line.
Inspect and repair.
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•
Low voltage, won’t start.
Check power source.
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Voltage wrong.
Check power source.
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Worn diaphragm.
Replace.
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•
Leaky hose or check valve.
Replace.
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Dirt or liquid on top of diaphragm.
Inspect and clean.
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Motor not wired correctly.
Check wiring diagram/line voltage.
