Specifications
ALIMAK 34630 - 1 /01
F 1
Electrical troubleshooting
Advice concerning procedures for troubleshooting
All forms of troubleshooting require adapting the procedure to
the function and structure of the equipment and to other
conditions which may be local in nature. For example, the
erection site, maintenance, previous operational problems, etc.
The main principles of all forms of troubleshooting in electric
systems are presented below. Troubleshooting is carried out
with the aid of a test lamp or voltmeter. We recommend a
voltmeter, preferably a universal instrument, for rapid and
reliable troubleshooting.
WARNING!
Hazardous voltage
Only authorized electricians or authorized service
personnel can carry out work on the electrical
equipment.
Can cause severe injury or death.
1. Use the circuit diagram. This diagram is located in a box
in the car. The diagram indicates how the electrical
equipment should function, how it is built and connected.
1a. Check that the stopping circuit is not open, in other words
that thermal relays and phase failure relays have not been
actuated and that the limit switches for the safety device,
final limit switch and other limit switches have closed
contacts. Make sure that stop buttons, including buttons on
landings, are not in the depressed position. When the stop
circuit is closed, the main contactor, if any, will be in the
”On” position.
1b. Check that the normal and final terminal switches for ”Up”
and ”Down” function respectively are as intended.
2. Connect the voltmeter/test lamp between the zero terminal
and the terminal as indicated on the circuit diagram, and
check that power is supplied where it should be supplied.
Go through each terminal, one by one, and work
methodically so that the circuits which function correctly
can be eliminated and the fault can be localized.
3. Begin at the button landing by checking that power is
supplied on all three phases of the incoming main voltage.
4. Check that the outgoing hoist cable receives power when the
main switch is switched on.
5. Now begin troubleshooting in the hoist car by checking
that the power reaches the car.