KITO ER2 Serie Manuel Du Propriétaire page 96

Chapter 3 Troubleshooting
Guidance on Troubleshooting (continued)
■ Dual Speed VFD Model
Unable to restart the VFD by resetting with emergency stop
(the case when the VFD cannot be reset even after cool down)
Electric chain Sounds no brake operating sound
hoist does not
operate without
load
3
Sounds brake operating sound
Electric chain Does not operate with a load
hoist operates (Motor sounds howling)
without load
Operates slowly with a load
Electric chain hoist operates in low speed
mode, but does not operate in high speed
mode or operates slowly.
Does not operate in lowering or in low speed mode.
Operates Operates differently from the indication of the
differently from Push Button Switch
the indication (operates in the opposite direction)
of the Push
Button Switch.
Does not operate when operating any one of
the Push Button Switch
96
Conditions Main fault contents
Those related to VFD
Improper source voltage
Breakage and burning of
control circuit
Faulty electrical part
Breakage and burning of
power circuit
Failure of motor or brake
VFD trip due to motor overheat
(electronic thermal relay)
VFD overheat
Breakage of driving part
Sticking of Bearing
Overload
(Clutch activated)
Voltage drop
Low source voltage
Voltage drop
Faulty Braking Resistor
Negative phase connection of
motor lead wires
Wrong connection
Breakage of control circuit
Faulty electrical part
Reference
Check item
Check the error code of
"VFD
VFD referring to "VFD
Manual"
Manual".
(annex)
Power
Circuit breaker
Power Cable
Internal wiring
Transformer
Fuse
Relay
Interface Board
VFD
Upper/Lower Limit Switch
Push Button Switch
Motor
Brake
Internal wiring
Relay (melted contact point)
VFD
VFD
Gears and Joints
Bearing
Friction Clutch
Friction Clutch with
Mechanical Brake
Power Cable
Power
Power Cable
Braking Resistor
Motor
Internal wiring
Push Button Switch
Internal wiring
Push Button Switch
VFD
Interface Board
Upper/Lower Limit Switch
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