4 Error Indication
The frequency converter can record the reasons of the last 4 errors and can dis-
play them after resetting from errors.
Error
code
Error name Possible reason Solution
O.C.-1
Over cur-
rent at con-
stant speed
Excessively reduced accelera-
tion/ deceleration time
Increase acceleration/ deceleration time
Load short circuit or sudden
changes in load
Check the load
Low grid voltage Check input power supply
A special motor or a motor larg-
er than the maximum allowable
capacity
Use a frequency converter with suitable
power
O.C.-2
Over cur-
rent during
acceleration
Too short acceleration time Increase acceleration time
Improper V/f curve
Enable automatic torque increasing or man-
ually adjust V/f curve settings
The frequency converter power
is too low
Select a frequency converter with higher
power
O.C.-3
Over cur-
rent during
decelera-
tion
Too short deceleration time Increase deceleration time
Large load inertia torque or po-
tential load
Add an appropriate dynamic brake chopper
The frequency converter power
is too low
Select a frequency converter with higher
power
O.E.-1
Over volt-
age at con-
stant speed
Too high input voltage of power
supply
Keep the input voltage of power supply with-
in the specified range
Excessively reduced accelera-
tion/ deceleration time
Increase acceleration/ deceleration time
Abnormality in load Check the load
O.E.-2
Over volt-
age during
acceleration
Abnormality in input voltage of
power supply
Check input power supply
Abnormality in load Check the load
O.E.-3
Over volt-
age during
decelera-
tion
Too large moment of inertia of
load
Increase the deceleration time to suit the
load inertia, or purchase a dynamic brake
chopper
Bosch Rexroth AG
Error Indication
26/31
DOK-RCON01-FE*********-IN04-EN-P
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