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89
Description of alarm display indications
Error
indication
Description of
fault operation
Item for inspection Processing
OH Overheating of
the cooling fan
detected
1. Cooling fan stops
2. Ambient temperature too
hot
3. Motor being overload
1. Exchange the cooling
fan
2. Lower the ambient
temperature
3. Check the load
conditions
OL Overload
detected for more
than one minute
OL A
Overload
warning, the
motor is nearly
1min, 150%
overload.
Is the motor being overloaded Increase the capacity of the
inverter and motor
Is the motor being overloaded Increase the capacity of the
inverter and motor
bUOH DBR overheat
detected
ES Emergency
switch active
Is the braking ratio
appropriate
Check if DI6 and COM are
open.
Reduce GD
2
of load or
lengthen deceleration time
Short DI6 and COM
Fb Fuse blown Is the fuse blown Change a fuse
PLU Power voltage too Is power voltage too low Improve power supply
low
condition
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