Trane TR200 specifications Start Up Troubleshooting, Symptom, Possible cause, Test, Solution

Start Up Troubleshooting

Symptom	Possible cause	Test	Solution
	Motor overloaded	Motor is drawing too much current for	Perform startup and verify motor current
		the application.	is within specifications. If not, reduce the
			load on the motor.
	Loose connections	Look for signs of overheating on	Perform pre-startup check for loose
Overload trips		connections to OL.	connections and tighten. Replace any
			overheated components and wires.
	OL not set correctly	An improperly set OL can cause the OL	Set correct motor current on OL.
		to trip too soon. See pre-startup
		procedure for correct setting.
	Contamination	Remove contactor and check for	If contamination is found, repair or
		contamination.	replace.
Contactor fails	Defective coil	Compare coil resistance to contactor	If readings are not the same or if there
		specification. Inspect the coil for signs	are visible signs of damage, replace the
to pull in
		of overheating and damages.	coil or contactor.
	Auxiliary contact binding action	Remove auxiliary contacts and test	If contactor operates with auxiliaries
		contactor action.	removed, replace auxiliary contacts.
	Contamination	Remove the contactor and check for	If contamination is found, repair or
		contamination.	replace.
Contactor fails	Defective coil	Compare coil resistance to functional	If readings are not the same or there are
		contactors of the same size.	visible signs of damage, replace the coil
to drop out
			or contactor.
	Auxiliary contact binding action	Remove auxiliary contacts and test	If the contactor operates with auxiliaries
		contactor action.	removed, replace auxiliary contacts.
	Problem with mains power	Rotate incoming power leads into	If the imbalanced leg follows the wire, it
		option panel one position; A to B, B to	is a power problem. Causes can vary.
Mains current		C, and C to A.	Contact an electrician or power expert
imbalance			for a solution.
greater than	Problem with option panel	Rotate incoming power leads into	If the imbalanced leg stays on the same
3%		option panel one position; A to B, B to	option panel input terminal, it is a
		C, and C to A.	problem with the option panel. Contact
			the factory for assistance.
	Problem with motor or motor wiring	Rotate outgoing motor leads one	If the imbalanced leg follows the motor
		position; U to V, V to W, and W to U.	lead, the problem is in the motor or
Motor current			wiring to the motor. Causes can vary.
			Contact an electrician or motor expert
imbalance
			for a solution.
greater than
	Problem with option panel	Rotate outgoing motor leads one	If the imbalanced leg stays on the same
3%
		position; U to V, V to W, and W to U.	option panel output terminal, it is a
			problem with the option panel. Contact
			the factory for assistance.

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