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7.3.4
Operational checks with controller enabled
Before every working shift, all of these checks must be done with the emergency stop button released and with the
power turned on.
1
Warning devices
Check that all warning devices (for example, pilot lamps, LEDs, displays,
horns, gongs, bells, sirens, beacons, strobe lights) are working correctly
before using the hoist.
2
Control devices with power
Starting at low speed, check that movements correspond to the
controller
labels. Check that the brakes operate in all directions and that the speed
increases as it should do in relation to the control.
3
Noise
Listen for unusual noises.
4
Limit switch
Upper and lower mechanical limit switches
Check the condition of the limit switch activator. It is either an integrated
rubber pad or a separate spring or disc that is placed on top of the load hook.
If the limit switch activator is damaged or not in place, it is a sign that the limit
switch is not functioning correctly
Check for correct operation of the limit switches by raising and lowering the
hook
at low speed
. When doing this check for limit switch operation, the chain
needs to be driven from one end to the other.
