Emerson 7000 manual Troubleshooting for MV Acts, Transfer Control, Failure to Synchronize

3-2 Troubleshooting 381333-395

Troubleshooting for MV ACTS

!DANGER

Refer to the Group 5 Controller User’s Guide 381333-126for ATS status display messages, time delays, pickup & dropout settings, & adjustments.

Hazardous voltage capable of causing shock, burns, or death is used in the switch. Do not touch the power or load terminal of the transfer switch!

Problem	Check in Numerical Sequence
	1 Operation	2 Gen-Set	3 Voltage on
			Display
		Starting control must be in
Gen-Set does not start	Hold Transfer Test switch 15	the automatic position.
		Batteries must be charged
when the Transfer	seconds or the outage must be	and connected. Check
Control switch is turned	long enough to allow for	wiring to engine starting
and held in Transfer Test	Feature 1C time delay plus	contacts on customer
position or when the	engine cranking and starting	terminal block TB. Verify on
normal source fails.	time.	the controller that small
		plug J3 is connected to
		receptacle P3.
			Emergency
Transfer switch does not		Generator output circuit	voltage on
transfer the load to the	Wait for Feature 2B time delay	breaker must be closed.	controller display
emergency source after		Generator frequency must	should read at
	to time out (if used).
the engine-generator set		be at least 95% of nominal	least 90% of
starts.		(57 Hz for a 60 Hz system.)	nominal phase to
			phase voltage.
Transfer switch does not			Normal voltage on
transfer the load to			controller display
normal source when	Wait for Feature 3A time delay		should read at
normal returns or when	to time out (if used).		least 90% of
the Transfer Control			nominal phase to
switch is released.			phase voltage.
Engine-generator set
does not stop after load	Wait for Feature 2E time delay	Starting control must be in
retransfer to the normal	to time out (if used).	the automatic position.
source.
Failure to Synchronize	Conditions of normal or emergency	sources not suitable for closed transition
light comes on.	transfer. Recheck voltage and frequency of both sources. Press Alarm Reset.
Extended Parallel Time	CBN and CBE contacts are closed longer than setting in the controller. Open the
light comes on.	disconnected source CB, then call ASI for assistance.
TS Locked Out light	Transfer lockout operation has occurred; transfer switch is disabled from automatic
comes on.	operation. Open the disconnected source circuit breaker, then call ASI.
Circuit breaker trips (on	Check the controller display for error messages and determine the cause of the
	trip. After the fault is cleared, turn the Breaker Control switch to CLOSE. Press
an ATS without protective
	the Alarm Reset button.
relay)
	The CB should close.
Circuit breaker trips (on	Check the protective relay and determine the cause of the trip (refer to device’s
	instructions). After fault is cleared, reset the protective relay. Then reset the Lock-
an ATS with a protective	Out Relay by turning it to RESET. Next turn the Breaker Control switch to
relay)	CLOSE. Press the Alarm Reset button.
	The CB should close.