Yale Series Y80 User Manual

Page 19

a. Check switches, circuit breakers or fuses and

connections in power supply lines. Check power
collectors.

b. Check voltage required on motor data plate

against power supply.

c. Shut off power supply, remove electrical cover on

hoist and check wiring connections. Also check
connections in push button station and limit
switches.

d. See that necessary jumper wires are properly

installed. Verify that the contactor armatures are
free to move. If binding occurs, replace contactor.
Check for burned out contactor coils.

e. Check transformer fuse. If blown, check for

grounding and/or shorts in the push button station.
C h e ck   t h e   t r a n s fo r m e r   c o i l   fo r   s i g n s   o f
overheating. Replace transformer if burned out.
Verify the transformer secondary is the same
voltage as the coils to which it is connected.

f. Replace motor. Check input power supply. Check

hoist motor connections.

a. Interchange any two power supply line leads.

Refer to Section II, paragraph 2-4 b.

b. Check wiring connections with appropriate wiring

diagram.

a. Check for loose connections. See that necessary

jumper wires are properly installed on contactor.

b. See that necessary jumper wires are properly

installed. Verify that the contactor armatures are
free to move. If binding occurs, replace contactor.
Check for burned out contactor coils.

c. Check push button contacts and wires.

a. Reduce loading to rated load of hoist, as shown

on nameplate.

b. Check for loose connections. See that necessary

jumper wires are properly installed on contactor.
Check limit switch mounting and  connections.

c. See that necessary jumper wires are properly

installed. Verify that the contactor armatures are
free to move. If binding occurs, replace contactor.
Check for burned out contactor coils.

d. Check push button contacts and wires.

6-1. Hoist Will Not Operate.

6-2. Hook Moves in Wrong

Direction.

6-3. Hook Will Raise But
Not Lower.

6-4. Hook Will Lower But

Not Raise.

a. No power to hoist.

b. Wrong voltage.

c. L o o s e   o r   b r o ke n   w i r e

connections in hoist electrical
system.

d. C o n t a c t o r   a s s e m bl y   n o t

functioning.

e. No control voltage.

f. Motor burned out.

a. Reverse phasing on three-

phase hoists.

b. Hoist wired wrong.

a. Lower electrical circuit open.

b. C o n t a c t o r   a s s e m bl y   n o t

functioning.

c. Down, push button inoperative.

a. Excessive load.

b. Hoist electrical circuit open.

c. C o n t a c t o r   a s s e m bl y   n o t

functioning.

d. Up, push button inoperative.