VFD-V Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
7-2
Code Displayed Error Explanations Treatments
OL: AC drive overload
Output current exceeds the
AC drive-bearable current;
e.g. could sustain for 60
seconds if the output is
150% of the AC drive rated
current.
Decrease the loading and extend
the acceleration time
Check whether the motor is
overloaded
Decrease the (Pr. 07-02) torque
level-up setting
Increase the AC drive output
capacity
OL1: motor overload
Internal electronic thermal
relay protections
Decrease the loading
Check whether the motor is
overloaded
Check whether the rated current
value of the motor (Pr. 07-00) is
appropriate
Check the electronic thermal relay’s
function setup
Increase the motor capacity
OL2: motor overload
Motor with exceedingly
great loading
Check whether the loading of the
motor is too great
Check the setting of the
over-torque detection level
(Pr. 06-03 ~ 06-05)
External EF terminal
closed, and the AC drive
would stop the output
Eliminate the fault source and then
press the RESET button
Fault occurred within the
protection circuit of the
controller
Check every appliance that connects
to the AC drive
Return to the factory
Over-current during accel
Check whether the screw between
the AC drive and the motor is
tightened or not
Check whether the U-V-W output
connection cord is of poor insulation
Increase the decel time
Decrease the (Pr. 07-02) torque
level-up setting
Replace with the AC drive that
possesses greater output capacity
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