USE AND MAINTENANCE MANUALUSE AND MAINTENANCE MANUAL
Chain hoist from 198kg to 2500kg
99 TROUBLESHOOTINGTROUBLESHOOTING
PROBLEMPROBLEM Possible CAUSEPossible CAUSE CHECKS and SOLUTIONSCHECKS and SOLUTIONS
1. The electric chain hoist is connected
to the control system but does not work
a. The upstream circuit breaker has
tripped.
b. The command line fuse is broken or
blown
c. Failure of a mains phase.
Damaged power cord.
Interrupted stator winding.
d. The power supply or control circuit are
open.
e. Interrupted transformer or reversing
starter coil winding.
f. Up/down limit switch failure.
g. Loose or interrupted connection within
the circuit.
h. Mechanical jamming of the reversing
starter.
i. The brake does not open; the brake
coil is open, short-circuited or
interrupted; blown trip unit.
j. Wrong supply voltage or frequency
k. Excessive load
Reset the tripped circuit breaker.
Replace the fuse according to the
instructions in paragraph 8.3.
Check electrical continuity and identify
the defective part. If the repair does not
fall within the authorised ones (see Ch.
8), contact EXE TECHNOLOGY
personnel.
Supply the hoist with voltage and
frequency as indicated on the hoist
identification plate.
Reduce the load according to the limits
indicated on the hoist identification plate.
2. The hoist moves in the opposite
direction
a. Inversion of the three-phase
sequence supply.
Operate on the plug's mechanical
inverter for a direct 3-phase sequence
supply.
3. The hoist moves only down and not
up
a. The clutch slips with excessive loads.
a. Open control circuit.
b. Down reversing starter coil winding
open, interrupted or short-circuited.
c. Up limit switch failure.
d. Loose or interrupted connection within
the circuit.
Reduce the load according to the limits
indicated on the hoist identification plate.
Check electrical continuity and identify
the defective part. If the repair does not
fall within the authorised ones (see Ch.
8), contact EXE TECHNOLOGY
personnel.
4. The hoist moves only up and not
down
a. Open control circuit.
b. Down reversing starter coil winding
open, interrupted or short-circuited.
c. Speed selection relay coil winding
open, interrupted or short-circuited.
d. Down limit switch failure.
e. Loose or interrupted connection within
the circuit.
Check electrical continuity and identify
the defective part. If the repair does not
fall within the authorised ones (see Ch.
8), contact EXE TECHNOLOGY
personnel.
5. The hoist does not stop immediately
a. The brake slips.
b. Excessive load.
Check brake adjustment. If the repair
does not fall within the authorised ones
(see Ch. 8), contact EXE
TECHNOLOGY personnel.
Reduce the load according to the limits
indicated on the hoist identification plate.
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