100
Troubleshooting (continued)
Power Cable
Symptom Cause Remedy Main factor Countermeasure
Electric chain hoist
does not operate.
Wire breakage
(more than two
wires)
Check the conduction, flaw, crimping of
terminals and soldering of plug.
When any deficiency was observed,
repair or replace the cable.
Excessive force
applied on the cable
Support the cable with
Cable Support Arm
securely.
Non use of shake proof
cable
Use shake proof cable
to the moving part.
Twist of wire Layout the wires
without twisting.
Cable was impeded by
other facility.
Fix the cable not to
be impeded by other
facility.
Wire burning (more
than two wires)
Check the cable. Replace it if burnt. Temperature rise due
to insufficient cable
capacity
Use the cable with
proper capacity. (See
P54.)
Cables are bundled. Do not bundle wires.
Insufficient insertion
of plug
Insert the connector plug to the end of
the receptacle. Tighten the coupling ring
securely.
Insufficient insertion at
the installation
Fix the connector
plug to the receptacle
securely.
Loosening of the fixing
thread due to impact or
vibration
Use the electric chain
hoist avoiding the large
impact.
Slow start or unable
to start
Insufficient cable
capacity
Check the cable size for adequacy.
Replace with the proper cable if the
cable capacity is insufficient.
Voltage drop due
to insufficient cable
capacity
Use the cable with
proper capacity. (See
P54.)
Electric chain hoist
operates but unable
to lift a load. (single
phase status)
Breakage or
burning of one
phase only
Refer to the breakage and burning of above items.
For single speed
model, the electric
chain hoist operates
in the direction
different to the push
button operation
(negative phase).
* For dual speed
VFD model, refer
to the item of
VFD.
Wrong connection
of power line when
wiring
Change two wires of power line. Wrong connection
when assembling
Refer to the connection
diagram and connect
wires correctly.
Chapter 3 Troubleshooting
• Do not change the connection at the
Push Button Switch circuit.
The change of circuit at the Push Button Switch
circuit is very dangerous as the limit switch
becomes not to function.
Prohibited
3
Power Cable Troubleshooting
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