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9. TROUBLESHOOTING GUIDE
CONDITION
UNUSUALLY NOISY
HIGH TEMPERATURE
POOR VACUUM
OIL LEAKS
PUMP DOES NOT START
THERMAL CUT-OUT
Design, specification or materials subject to change without notice.
Operating Manual for GVP Vacuum Pump Series
POSSIBLE PROBLEM
Bad bearings
Loose motor bolts
Coupling drive
Dirty, low, improper oil
Air leaks in connections
Low voltage
Worn bearings
Low oil level
Systems leaks
Low oil level
Dirty oil
Worn pump
Air leaks at connections
Air leak through seal
Oil leaks through exhaust
Oil leaks through seal
Oil leaks through reservoir
System vented pressure through pump
Pump tipped over
No voltage supplied
Damaged motor
Thermal cut-out
Low / incorrect voltage
Cold weather
Dirty oil
SOLUTION
Replace
Tighten bolts
Adjust /replace coupling
Replace oil
Check / adjust
Check voltage
Replace / repair
Add / replace
Repair leaks
Add / replace
Flush / replace
Replace module
Check / repair
Replace
Oil level too high
Replace seal
Tighten bolts replace gasket
Check oil level / add
Check oil level /add
Check wiring
Repair / replace
Self restore, wait and verify cause
Check voltage
Open intake fitting and gas ballast for
1 minute to warm up while starting
Replace
07
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