GE QS2800V, QS1800V T R O U B L E S H O O T I N G G U I D E, Problem, Possible Causes, Remedies

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.

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