Specifications

6. Check in the car M-panel that power occurs on all three phases of the incoming cable from the
ground landing.
7. Check that the ”Up” and ”Down” pulses from the pushbuttons and control devices reach the
electric cabinet in the car in the intended manner.
8. Make a trial run and check that the coil on the relevant contactor (Up, Down) receives power
and that it is actuated.
Check that the brake contactor is actuated and that the brake coil is energized so that the
brake releases.
9. If the fault does not occur in the hoist operating system,but in its lighting or signal system,
carry out fault-tracing in a manner similar to that described above. Check the circuits
methodically one by one until you have narrowed down the fault and localized it.
Experience shows that certain faults have symptoms which, may indicate the cause and the
probable location of the fault:
Example:
Symptom Probable cause Probable fault location
a) Control fuses blow Short-circuit, equipment Damaged control cable, da-
immediately. grounded. maged push-button, limit
switch etc. located ”exter-
nally ”, usually on landing.
b) Fuse blows after a short Equipment partially grounded, Dampness or water in limit
period of time overload. switch, junction box, door
lock, etc due to damaged
electrical components.
Improperly connected new
equipment.
c) Hoist stops or cannot be Limit switch in stop circuit Stop push-button depressed,
started. has tripped/been actuated, gate open, thermal relay ac-
blown fuse. tuated due to overload or
careless operation, open
trapdoor, *switch in safety
device actuated, power
failure from supply. See also
a) and b) above.
d) Hoist does not come when Broken stopping circuit. Door/gate not fully closed,
called for. emerg. stop button
depressed.
e) Hoist stops and can be re- Switch actuated in the stop Slack rope switch, gate switch
started, but then stops again. circuit. too close to the cam.
* The switch is set at the factory and may not be adjusted.
ALIMAK 34631 - 1 /01
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