Cornelius JT20, JS7, J15, EJ1, JT30 manual Trouble Shooting

Jet Spray (Cold) Training Manual

	PROBLEM (fault)		CAUSE (diagnosis)		ACTION (remedy)
2.	Compressor will not	A. Improperly wired		A. Check wiring against
	start — hums but trips	B. Low voltage to unit			diagram
	overload protector	C. Relay not closing		B. Correct problem
		D. Compressor motor		C. Correct problem
			winding open or	D. Replace compressor
			shorted
		E. Internal mechanical		E. Replace compressor
			trouble in compressor
		F.	Liquid refrigerant in	F.	Add crankcase heater
			compressor		and/or accumulator
3.	Compressor starts but	A. Improperly wired		A. Check wiring against
	start winding does not				diagram
	switch off	B. Low voltage to unit		B. Correct problem
		C. Relay failed to open		C. Correct problem
		D. Excessively high dis-		D. Check discharge shut-
			charge pressure		off valve, possible
					overcharge, or insuffi-
					cient condenser cooling
		E. Compressor has wind-		E. Replace compressor
			ing open or shorted
		F.	Internal mechanical	F.	Replace compressor
			trouble in compressor
4.	Compressor starts but	A. Additional current		A. Check wiring diagram;
	then short-cycles on		passing thru overload		check for added fan
	overload protector		protector		motors, pumps, etc.
					connected to wrong
					side of connector
		B. Overload protector		B. Check current, replace
			defective		protector
		C. Excessive discharge		C. Check ventilation,
			pressure		restrictions in cooling
					medium or refrigera-
					tion system
		D. Suction pressure too		D. Check for possible mis-
			high		application, use stron-
					ger unit
		E. Compressor too hot,		E. Check refrigerant
			return gas hot		charge and add if nec-
		F.	Compressor has wind-		essary (fix leak first)
			ing open or shorted	F.	Replace compressor

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TROUBLE SHOOTING