Spencer FastVac Vacuum Cleaning Systems - Manual (Page 7)

7
PROBLEM Possible Cause Corrective Action
MOTOR DOES NOT TURN
AND THERE IS…
HUMMING SOUND – One phase of power line disconnected Connect power leads properly
– One phase of stator line open Contact Spencer
– Bearing(s) defective Change defective bearing(s)
– Impeller jammed by foreign material Clean impeller
– Impeller jammed against casing or side cover Adjust gap
– Rubbing of rotor core and stator core Contact Spencer
– Capacitor open (single-phase models) Change capacitor
NO SOUND – Two phases of power line disconnected Connect power leads properly
– Two phases of stator winding open Contact Spencer
– Faulty switch connection Change switch
– Fuse blown Change fuse
MOTOR TURNS, BUT…
FUSE BLOWS – Fuse capacity insufficient, wiring fault Inspect wiring
– Short circuit Repair
– Terminals shorted Improve insulation and check connections
– Excessive load Increase airflow
OVERHEATS OR OVERLOAD
RELAY ACTIVATES
– Power source unbalance; possible Check voltage; phases must be
VOLTAGE DROP balanced within 5% and voltage must be within 10% of rated
– Operating in single-phase condition Check connections
– Excessive friction due to defective bearings Replace bearings
– Impeller contaminated by foreign material Clean impeller
– Impeller rubbing against casing or side cover Adjust gap
– Operation at less than minimum rated flow Increase airflow (check relief valve)
– Incorrect vacuum relief Adjust bleed
MAKES ABNORMAL SOUND – Impeller rubbing against casing or side cover Adjust gap
– Impeller rubbed by foreign material Clean impeller
– Bearing(s) defective Replace bearings
– There is a leak or air passages are clogged Repair or clean
– Loose cap screw Tighten screw
LOW SYSTEM VACUUM – Clogged filter Clean filter
– Leak in tubing system Locate and remove leak
– Leak in dirt can Clean or replace gasket
– Too many operators on line Reduce the number of users
DIRT COMING OUT – Filter is damaged or improperly installed Replace or reinstall filter
OF EXHAUST
– Material vacuumed is extremely fine Consult Spencer
SYSTEM MAKES – Leak at a machine joint Check dirt can and top cover
HIGH-PITCHED SQUEAL
VI. Troubleshooting Guide