Spencer Power Mizer Multistage Centrifugal Cast Blowers Manual

14
Indication: motor malfunction
•Abnormalhumorwhine.
•Lowvoltage,motornotuptospeed.
•Highvoltage(causesnoiseandburn-
out).
•Bearingnoise(seeprevious
instructions for blower bearings).
•Loosepartinmotor.
•Lowfrequency.
Check motor manufacturer’s instructions; check voltage
supply and connections.
Correct improper voltage.
Correct improper voltage.
Tighten, repair or replace (check with motor manufacturer).
Correct improper frequency.
MOTOR HOT (Check with surface thermometer; consult Spencer Service Department for assistance)
•Ambienttemperaturetoohighforinsu-
lation class.
•Incorrectvoltage.
•Incorrectcycle.
•Electricalshort-circuitinsulation
failure.
•Motoroverloaded,toomuchair
passing through blower.
Cool motor or replace with motor having proper insulation.
Change to correct voltage.
Change to correct cycle.
Repair or replace motor.
Check for system leaks, throttle back butterfly valve, install
larger motor.
MACHINE
NOISY
Indication: machine malfunction – bearing whining or growling
•Bearinghot.
•Bearingfailure.
•Bearingretainersworn.
•Bearingturningonshaft,retainingnut
loose.
•Bearingturninginhousing,housingworn.
•Bearingreplacedincorrectly(e.g.,
angled, cramped or reversed).
Check lubricant, add or drain as necessary. Be sure oiler is
functioning properly and screw cap is tightened properly.
Replace bearing(s).
Replace bearing(s).
Tighten nut, check for damage.
Replace housing and bearing.
Follow installation directions carefully, check bearing, shaft
and housing dimensions.
Indication: machine malfunction – internal noise
•Impellerswornduetoageorabrasion
from dirty air or gas.
•Machineinsurge(seepage8).
•Machinerunningrough,outofbalance.
•Couplingmisalignedand/oroutof
grease.
•Foreignmatterinmachine.
•Impellersorshaftsleevehitting.
Correct abrasive conditions if present; consult Spencer
Service Department regarding impeller replacement.
Increase airflow.
Consult Spencer Service Department.
Check alignment, realign if necessary; check coupling for
wear, replace if worn; relubricate as instructed.
Consult Spencer Service Department regarding machine
cleaning; install inlet filter to prevent clogging.
Consult Spencer Service Department.
IX. Troubleshooting Guide (cont.)
PROBLEM Possible Cause Corrective Action