Yale Series Y80 manual Section Vl Trouble Shooting Probable Cause Remedy

SECTION Vl - TROUBLE SHOOTING

	Trouble	Probable Cause			Remedy
6-1.	Hoist Will Not Operate.	a. No power to hoist.			a. Check switches, circuit breakers or fuses and
					connections in power supply lines. Check power
					collectors.
		b. Wrong voltage.			b. Check voltage required on motor data plate
					against power supply.
		c. Loose or	broken	wire	c. Shut off power supply, remove electrical cover on
		connections	in hoist electrical		hoist and check wiring connections. Also check
		system.			connections in push button station and limit
					switches.
		d. Contactor	assembly	not	d. See that necessary jumper wires are properly
		functioning.			installed. Verify that the contactor armatures are
					free to move. If binding occurs, replace contactor.
					Check for burned out contactor coils.
		e. No control voltage.			e. Check transformer fuse. If blown, check for
					grounding and/or shorts in the push button station.
					Check the transformer coil for signs of
					overheating. Replace transformer if burned out.
					Verify the transformer secondary is the same
					voltage as the coils to which it is connected.
		f. Motor burned out.			f. Replace motor. Check input power supply. Check
					hoist motor connections.
6-2.	Hook Moves in Wrong	a. Reverse phasing on three-			a. Interchange any two power supply line leads.
	Direction.	phase hoists.			Refer to Section II, paragraph 2-4 b.
		b. Hoist wired wrong.			b. Check wiring connections with appropriate wiring
					diagram.
6-3.	Hook Will Raise But	a. Lower electrical circuit open.			a. Check for loose connections. See that necessary
Not Lower.					jumper wires are properly installed on contactor.
		b. Contactor	assembly	not	b. See that necessary jumper wires are properly
		functioning.			installed. Verify that the contactor armatures are
					free to move. If binding occurs, replace contactor.
					Check for burned out contactor coils.
		c. Down, push button inoperative. c. Check push button contacts and wires.

6-4. Hook Will Lower But	a. Excessive load.	a. Reduce loading to rated load of hoist, as shown
Not Raise.		on nameplate.
	b. Hoist electrical circuit open.	b. Check for loose connections. See that necessary
		jumper wires are properly installed on contactor.
		Check limit switch mounting and connections.
	c. Contactor assembly not	c. See that necessary jumper wires are properly
	functioning.	installed. Verify that the contactor armatures are
		free to move. If binding occurs, replace contactor.
		Check for burned out contactor coils.

d. Up, push button inoperative.

d. Check push button contacts and wires.

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