KITO ER2 - Page 96

96
Conditions Main fault contents Check item
Reference
page
Unable to restart the VFD by resetting with emergency stop
(the case when the VFD cannot be reset even after cool down)
Those related to VFD Check the error code of
VFD referring to “VFD
Manual”.
“VFD
Manual”
(annex)
Electric chain
hoist does not
operate without
load
Sounds no brake operating sound Improper source voltage Power 99
Breakage and burning of
control circuit
Faulty electrical part
Circuit breaker 99
Power Cable 100
Internal wiring 104
Transformer 104
Fuse 105
Relay 105
Interface Board 108
VFD 108
Upper/Lower Limit Switch 106
Push Button Switch 107
Breakage and burning of
power circuit
Failure of motor or brake
Motor 101
Brake 102
Internal wiring 104
Relay (melted contact point) 105
VFD trip due to motor
overheat (electronic
thermal relay)
VFD 108
VFD overheat VFD 108
Sounds brake operating sound Breakage of driving part
Sticking of Bearing
Gears and Joints 115
Bearing 116
Electric chain
hoist operates
without load
Does not operate with a load
(Motor sounds howling)
Overload
(Clutch activated)
Friction Clutch 109
Friction Clutch with
Mechanical Brake
110
Operates slowly with a load Voltage drop Power Cable 100
Electric chain hoist operates in low speed
mode, but does not operate in high speed
mode or operates slowly.
Low source voltage Power 99
Voltage drop Power Cable 100
Does not operate in lowering or in low speed mode. Faulty Braking Resistor Braking Resistor 108
Operates
differently from
the indication
of the Push
Button Switch.
Operates differently from the indication of the
Push Button Switch
(operates in the opposite direction)
Negative phase connection
of motor lead wires
Motor 100
Wrong connection Internal wiring 104
Push Button Switch 107
Does not operate when operating any one of
the Push Button Switch
Breakage of control
circuit
Internal wiring 104
Push Button Switch 107
Faulty electrical part VFD 108
Interface Board 108
Upper/Lower Limit Switch 106
Guidance on Troubleshooting (continued)
Chapter 3 Troubleshooting
■
Dual Speed VFD Model
3
Dual Speed VFD Model Guidance on Troubleshooting