Emerson 185 manual Troubleshooting, Series, 381333-319E, Problem, Cause and Solution

Series 185 TROUBLESHOOTING

This troubleshooting guide describes some of the simple causes of problems with the installation of the automatic transfer switch. Troubleshooting beyond the scope of this guide should not be attempted by the installer. A licensed electrician must perform all internal troubleshooting.

ASCO Power Technologies can be contacted at: 1–800–800–2726 or customercare@asco.com

ELECTROCUTION FLASH HAZARD Do not work on the transfer switch until both the utility and generator are off. Turn OFF both circuit breakers.

Problem		Cause and Solution
The Utility Acceptable light	1.	Verify that the utility feed is connected and that its circuit breaker is ON.
does not come on when utility	2. With ALL POWER OFF, verify that the utility feed is 220–240 V ac and 60 Hz.
power is connected to the ATS.
		Check DIP switch S2 actuator 2, and DIP S1 actuator 4. See Table D for voltage
		and frequency settings.
	3.	With ALL POWER OFF, verify that the utility feed is wired to the terminal lugs
		on the bottom of the transfer switch marked L1 and L5. See the wiring diagram.
	4.	With ALL POWER OFF, verify that the transfer switch harness is connected
		properly to the controller (plug and receptacle tight).
The generator does not crank	1.	Hold the Transfer Test button for at least 15 seconds.
when the utility source fails or	2.	Verify that the generator starting controls are set for automatic operation (not in
when the Transfer Test button is
pressed.		manual mode).
	3.	Verify that the generator battery is connected and that the battery voltage meets
		the generator manufacturer’s recommendation.
	4.	Verify that the correct contact (normally open or normally closed) is being
		utilized (see the generator manual).
	5.	With ALL POWER OFF, verify engine start low voltage wiring between the
		controller terminal block and the generator. See the wiring diagram. Check that
		the plug is properly seated in the receptacle on the controller.
The generator cranks but does	1.	Verify proper generator operation (fuel in tank, oil level, spark plugs --- see
not start and run when the util-		generator manual).
ity source fails or when the	2.	With ALL POWER OFF, verify engine start low voltage wiring between the
Transfer Test button is pressed.
		controller terminal block and the generator. See the wiring diagram. Check that
		the plug is properly seated in the receptacle.
The generator starts and runs	1.	Verify that the generator feed is connected and that its circuit breaker is ON.
but the Generator Acceptable	2.	With ALL POWER OFF, verify that the generator feed is 220–240 V ac and 60
light does not come on.
		Hz. Check DIP switch S2 actuator 2, and DIP S1 actuator 4. See Table D for
		voltage and frequency settings.
	3.	With ALL POWER OFF, verify that the generator feed is wired to the terminal
		lugs on the top of the transfer switch marked L2 and L6. See the wiring diagram.
	4.	With ALL POWER OFF, verify that the transfer switch harness is connected
		properly to the controller (plug and receptacle tight).
	5.	Verify generator ac output (voltage and frequency --- see generator manual).
The generator starts and runs	1.	Verify that the Generator Acceptable light is on. If it is off, see previous trouble-
but the ATS does not transfer		shooting problem. The ATS will not transfer the load to an unacceptable source.
the load to the generator.	2.	With ALL POWER OFF, verify that the transfer switch harness is connected
		properly to the controller (plug and receptacle tight).

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