Error
code
Error name Possible reason Solution
PSr-
Problem with power supply on the main board
10 V overload situations on
I/O board
Remove the overload situation
EMC problems at customer
I/O interface
Remove the environmental inter‐
ference or EMI
Internal problem
● Check the wiring of control cir‐
cuit, main circuit and ground to
find out the source of interfer‐
ence
● Replace the frequency con‐
verter
EEPr
EEPROM error on
operating panel
Power failure while write /
read
Parameter initialization
If error happens at normal
power on, problems with ope‐
rating panel
Replace the operating panel
Parameter compatibility be‐
cause firmware update
Should be solved during develop‐
ment
ESS-
Soft start error
Soft start resistor value has
been changed due to high
over temperature
Replace the frequency converter
Mains input is unstable Check the input power supply
Mains input is weak Increase the power capacity
An input phase loss during
start up (3 phase)
Remove the input phase loss sit‐
uation
Main circuit capacitor deterio‐
ration
Replace the frequency converter
CE5-
Internal problem on
main board
Problem with CPU on main
board
● Check the wiring
● If it fails again, contact with
technical service
Bosch Rexroth AG
Diagnosis
DOK-RCON03-EFC-3600***-IT01-EN-P
Rexroth Frequency Converter EFC 3600
136/235
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