KITO ER2 Series User Manual

103
Symptom Cause Remedy Main factor Countermeasure
Electromagnetic
Brake does not
operate.
Rusting When the Brake is rusted shut, replace
the brake unit as a whole.
Wrong assembling of
packings
Assemble the brake
cover packings and V
ring securely.
Replace the packing if
deteriorated.
Leaving the electric
chain hoist in an
environment with rich
moisture
Operate the electric
chain hoist regularly.
Dew condensation Pay attention to the
use in an environment
where the ambient
temperature changes
rapidly.
Breakage of rectifier Measure the resistance of the rectifier
with circuit tester.
Anode terminal : Negative probe of the
circuit tester
Cathode terminal : Positive probe of the
circuit tester (measure
the resistance in kΩ
range)
When the resistance is almost zero, the
rectifier is normal.
In other cases, replace the rectifier.
Over current due to
over voltage or low
voltage
Operate the electric
chain hoist at the rated
voltage.
Excessive inching or
plugging operation
(consecutive
impression of start
rush current)
Do not perform
excessive operation.
Over current due to
over load
Use the electric chain
hoist with a load less
than the capacity.
Operation exceeding
short time rating or
intermittent rating
Check the short time
rating and intermittent
rating. Use the electric
chain hoist within these
ratings.
Over current due to
open phase operation
The electric chain hoist
cannot lift a load in
open phase operation.
When any abnormality
is observed, stop the
operation immediately
and check the cause of
open phase operation.
Too long (or short)
stopping distance
(stopping distance
may change slightly
depending on the
temperature.)
Abrasion of brake
lining
Measure the brake gap. If the gap
exceeds the service limit, replace the
electromagnetic brake unit as a whole
(See P79.)
Excessive inching
operation
Do not perform
excessive operation.
Louder operating
sounds
Abrasion of brake
lining
Measure the brake gap. If the gap
exceeds the service limit, replace the
electromagnetic brake unit as a whole
(See P79.)
Excessive inching
operation
Do not perform
excessive operation.
3
Troubleshooting Brake
(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