Emerson 7000 Troubleshooting for MV ATS, Danger, 381333-395, Problem, Check in Numerical Sequence

381333-395 Troubleshooting 3-1

Troubleshooting for MV ATS

!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
		the automatic position.
Gen-Set does not start	Hold Transfer Test switch 15	Batteries must be charged
when the Transfer	seconds or the outage must	and connected. Check
Control switch is turned	be 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	breaker must be closed.	controller display
emergency source after		Generator frequency must	should read at
	delay 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 normal			controller display
source when normal	Wait for Feature 3A time		should read at
returns or when the	delay to time out (if used).		least 90% of
Transfer Control switch is			nominal phase to
released.			phase voltage.
Engine-generator set does
not stop after load	Wait for Feature 2E time	Starting control must be in
retransfer to the normal	delay to time out (if used).	the automatic position.
source.
Circuit breaker trips (on an	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
ATS without protective
	the Alarm Reset button.
relay)
	The CB should close.
Circuit breaker trips (on an	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
ATS with a protective	Lock-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.