KITO ER2 Series User Manual

107
Push Button Switch
Symptom Cause Remedy Main factor Countermeasure
Electric chain hoist
does not operate.
(Electromagnetic
Contactor does not
operate.)
Emergency Stop
button is pressed to
its end and locked.
When the Emergency Stop button is
pressed and locked, turn it clockwise to
release the lock.
Emergency Stop
button
Forgot releasing the
Emergency Stop
button
Read “How to operate
the push button” (P28)
and use the electric
chain hoist.
Faulty switch unit Check the conduction of the contact
points. Replace the Push Button Switch if
it has no conduction.
Vibration, impact Use the electric chain
hoist avoiding the
impact.
Breakage inside the
switch
Check that the Push Button Switch
cord is connected with the switch unit
correctly. Repair the cord if it has no
conduction.
Vibration, impact Use the electric chain
hoist avoiding the
impact.
Loosened terminal
screw inside the
switch unit
Tighten the screw if loosened Vibration, impact Use the electric chain
hoist avoiding the
impact.
Wire breakage of
Push Button Switch
Cord
Check the conduction of the Push Button
Switch Cord. If it has no conduction,
replace the cable, or the Push Button
Switch Cord as a set.
Damage of cable cover Operate the electric
chain hoist not to
impede with other
facility.
External force applied
on the cable due to
improper tying of the
protection wire
Tie the protection wire
securely. (See “Cable
Connection” (P55).)
The electric
chain hoist does
not operate as
indicated.
Wrong wiring Check the wiring in accordance with
the wiring diagram. Perform the wiring
correctly.
If the wiring of the Push Button Switch
is correct, the cause is in the negative
phase connection. Change two wires of
the power line.
Wrong wiring Correct the wiring in
accordance with the
wiring diagram.
Wrong affixing of
N-E-S-W label
Affix the label in the correct direction. Affixing the label in an
improper direction
Affix the label
correctly.
Electric chain hoist
does not stop even
if the Push Button is
released
Defective return
action of the switch
unit
Replace the Push Button Switch if it does
not operate smoothly.
Vibration, impact Use the electric chain
hoist avoiding the
impact.
3
Troubleshooting Push Button Switch
(to be continued)

KITO ER2 Series Specifications

General

Control Voltage	24V
Duty Cycle	40% ED
Protection Class	IP55
Temperature Range	-20°C to +40°C
Type	Electric Chain Hoist
Frequency	50/60 Hz
Motor Insulation	Class F
Brake Type	Electromagnetic
Load Chain Grade	Grade 80
Ambient Temperature	-20°C to +40°C
Power Supply	3-phase
Lift Height	3 to 30 meters
Chain Falls	1 or 2
Voltage	200-240V, 380-480V