Operation
Chapter 5
Data
Description
Cause and action
display
%l1
Motor overload (OL1)
• Review the load size, V/f characteris-
tics, acceleration/deceleration time,
and cycle time.
The electronic thermal relay actuated
the motor overload protection function.
• Set the rated motor amperage in
constant No. 31 (electronic thermal
reference current).
• The maximum voltage frequency
(FBAS) was set too low (V/f charac-
teristics setting error) and caused
overcurrent.
• Set the maximum voltage frequency
to the rated motor frequency.
• Operated more than one motor with
one Inverter.
• Set constant No. 31 (electronic ther-
mal reference current) to “0.0 (A).”
Inverter overload (OL2)
• Review the load size, V/f characteris-
tics, acceleration/deceleration time,
and cycle time.
%l2
ef1
The electronic thermal relay actuated
the Inverter overload protection
function.
• Review the Inverter capacity.
• Review the external circuits.
External fault (EF1)
The Inverter received abnormal input
from external circuits.
• Review the external sequence.
• Check the signal line of multi-function
contact input for disconnection.
5-6
OMRON [ OMRON ELECTRONICS LLC ]
