Bosch Rexroth EFC 3600 Operating Instructions Manual page 134

Bosch Rexroth AG
Diagnosis
Error
Error name Possible reason
code
OL-2
EEP-
SPI-
132/235
Motor locked
Normal motor runs long time
with large load at low speed
Low mains voltage
Too large proportion of V/F
curve
Too large sudden load
change
Wrong input of motor rated
current
Multiple motors are running
under same frequency con‐
verter
Over excitation
Flash memory in a bad condi‐
tion
EMC problem on the main
board
Internal error on I/O board
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
Solution
Prevent motor lock
● Increase frequency converter
output frequency ([b1.04] or
potentiometer)
● Reduce load
● Use variable frequency motor
or set zero speed load
([E4.05]) to a higher value
● Set correct thermal motor time
constant ([S2.23])
Check the input power supply
Adjust V/F proportion and torque
increases
Check load
Set correct motor rated current to
[S2.04]
Do not connect more than one
motor to the frequency converter
Reduce [b1.45]
Try to backup the data from the
operating panel, and then replace
the frequency converter
Check the wiring of control circuit,
main circuit and ground to find out
the source of interference
Remove the EMC problem, if it
happens again, replace the fre‐
quency converter