1. Hoist will not run.
a. Warning light is not on. When
the isolator is turned off & on
again the light does not go on
at all.
b. Warning light is not on. When
the isolator is turned off & on
again the light goes on for 2
seconds then goes off.
c. Warning light is on
continuously (hoist is getting
too far out of level)
d. Warning light is flashing on &
off. (PLC is not counting pulses
from the proximity switches
frequently enough).
1. No power to hoist.
2. Loose or faulty connection in
supply wiring.
3. Blown globe in warning light.
4. The circuit breaker beside
the PLC has switched off.
5. The PLC has a fault.
1. The overhead tripbar has
been operated & has not reset
(the hoist will drive down but
not up.)
2. One of the thermal overloads
has switched off.
3. Either the up or down
contactor has a burnt out coil.
(K1M or K2M)
4. Loose or faulty connection in
the control wiring.
5. Up or down button is not
working (loose support pillar).
6. PLC has a faulty output relay.
1. one of the motor contactors
is stuck on (K3M or K4M)
2. One brake is not working
properly (one side of the hoist
is not stopping quickly enough
when lowering).
1. The vee belts are slipping.
2. the hoist is overloaded.
3. The hoist has jammed on an
obstruction or has overrun a
limit switch and hit an over
travel stop.
4. A motor pulley is loose on its
shaft. The key has fallen out.
a. Check the main isolator
switch next to the hoist is on.
b. Check for power at the
fuseboard.
c. Check the fuses are OK.
a. Check all connections are
tight. *
a. Replace globe then recheck
symptoms when hoist is turned
on again.
a. Find out what caused the
circuit breaker to switch off.
Reset circuit breaker.*
a. If either the power or the run
light on the left side of the PLC
is flashing, the PLC has an
internal fault. Contact the
nearest Tecalemit branch or
Klockner Moeller branch.
Replace the PLC.*
a. Adjust the overhead tripbar
(refer to the installation
instructions step 22).
a. Find out what caused the
thermal overload to switch off.
e.g. overload, phase
imbalance, setting too low.
Reset the thermal overload and
check it has reset.*
a. Replace the contactor.*
a. Check all the connections
are tight.*
a. Adjust and tighten the
support pillar.
a. Contact the nearest
Tecalemit or Klockner Moeller
branch. Replace the PLC.*
a. Replace the contactor.*
b. Reset the alarm.+
a. Clean the brake shoe and
the inside of the pulley with
solvent to remove all oil &
grease.
b. Replace the brakeshoe.
(refer to major service)
c. Reset the alarm.+
a. Tighten the belts. b. Reset
the alarm.+
a. Reduce the load to 3000 kg
Max. b. Reset the alarm.+
a. Manually wind the hoist off
the obstruction using a spanner
on the lift screw top castle nut.
b. Remove the obstruction or
repair the faulty limit switch.
c. Reset the alarm.+
a. Refit the key & pulley. Loctite
in place. Tighten the grubscrew.
b. Reset the alarm.+
ProblemProblem Symptom Possible Cause Remedy
Page 11
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