11
Possible Cause
VI. Troubleshooting Guide - Vacuum Producer
PROBLEM
INSUFFICIENT
AIR THROUGH
SYSTEM
MACHINE
NOISY
Corrective Action
Change motor leads to correct rotation.
Following instructions on pages 7-8, disassemble machine and
reassemble correctly.
Increase tubing size or install machine providing higher vacuum.
Restrict number of simultaneous operators or upgrade to larger
Industravac unit.
Use only Spencer tools, do not use open end hoses.
Refer to motor manufacturer's instructions, check voltage supply
and connections.
Disassemble, clean and inspect all parts, check filter bags for holes.
Replace impellers.
Refer to air gate instructions on page 6 and readjust.
Install larger Industravac unit to handle system requirements.
Eliminate all leakage; see separator troubleshooting section.
Remove drain plug and let excess grease drain out.
Grease per instructions of motor manufacturer.
Replace bearing.
Replace bearing.
Reassemble per instructions on pages 7-8, tighten impellers.
Bleed air at low flow to reduce heat.
Replace impellers.
Repair or replace deflectors.
Too much material passing through separator. Replace
impellers and/or deflectors. Check filter bags for holes. Check to
be sure filter bag material is correct for debris collected.
Increase air flow to stop surge condition.
Rebalance and/or clean machine, see further comments under
Machine Vibrating.
Reassemble and carefully realign shaft and motor.
Disassemble machine, inspect and clean. Check filter bags for
holes to prevent further clogging.
Check motor manufacturer's instructions, check voltage supply
and connections.
Check motor manufacturer's instructions, check voltage supply
and connections.
See External Machine Malfunction.
Rebuild motor properly and correct the end play.
Tighten, repair or replace. (Check with motor manufacturer.)
Separate power supply, correct frequency.
Indication: low vacuum as determined by gauge measurement
• Incorrect rotation.
• Incorrect reassembly of machine after customer
repairs.
• Tubing too small, causing excessive friction loss.
• Too many operators using system at once.
• Too much air entering system due to improper
tools or open end hoses being used.
• Machine running slow due to low motor voltage.
• Machine air passages clogged with material.
• Impellers worn due to abrasion or vibration.
• Air gate (blast gate) closed.
• System requirements incorrectly calculated.
• Too much leakage and/or openings.
• Too much grease; motor bearings hot.
• Too little grease; motor bearings dry.
• Bearing failure.
• Bearing retainers worn.
• Impellers hitting after field reassembly and/or
slipping on shaft due to heat.
• Impellers coming apart due to age.
• Deflectors coming apart due to age.
• Impellers and/or deflectors coming apart due to
wear from dirty air.
• Machine operating in surge or unbalanced flow
range.
• Machine unbalanced, running rough.
• Motor not aligned in casing, causing impellers to hit.
• Foreign material in machine.
Indication: motor malfunction
• Abnormal hum or whine.
• Wrong voltage (high voltage will burn out motor
and cause noticeable noise).
• Bearing noise.
• Motor rebuilt improperly, thrust taken on wrong end.
• Loose part in motor.
• Low frequency.
Indication: external machine malfunction–bearing whining or growling
Indication: machine design capacity too small for the system
Indication: internal machine malfunction