T R O U B L E S H O O T I N G G U I D E

 

 

 

 

 

 

PROBLEM

POSSIBLE CAUSES

REMEDIES

 

 

 

Motor runs, then stops

Motor starter heater size

Measure the current draw to

(continued)

too small

verify it is below the trip set-

 

 

ting. Increase the heater size

 

 

or adjust the trip setting to

 

 

correspond to the S.F.A. indi-

 

 

cated by the motor label.

 

 

 

 

Specify gravity of liquid or

QVS pumps are designed to

 

viscosity greater than

pump water. Consult the fac-

 

design

tory for liquids other than

 

 

water.

 

 

 

 

Water short in motor

With the pump filled with the

 

electrical lead

process fluid, use a megohm

 

 

meter to measure the resist-

 

 

ance between each motor

 

 

lead and ground first at low

 

 

voltage, then at a potential

 

 

between 500 and 1000V if the

 

 

low-voltage test indicates an

 

 

open circuit. Consult the

 

 

motor installation and main-

 

 

tenance manual for accept-

 

 

able values.

 

 

 

 

Bad connection

With the circuit de-energized,

 

 

check for continuity using an

 

 

ohmmeter.

 

 

 

 

Motor wired improperly

Confirm the circuit is wired for

 

 

single-phase or three-phase

 

 

power and the motor is

 

 

grounded.

 

 

 

 

Three-phase current

Make sure the three legs of

 

imbalance

your three-phase power are

 

 

balanced within ±5% of each

 

 

other.

 

 

 

18

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Image 24
GE QS2800V, QS1800V manual Tory for liquids other than, Voltage, then at a potential

QS1800V, QS2800V specifications

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