13.4.12 Error 12 (ESS-): Soft Start Error
Possible reason Solution
Soft start resistor value has been changed
due to over temperature
Contact with service
Power failure Check the input power supply
Input phase loss occurs during start-up (3 phase) Remove the input phase loss
Main circuit capacitor deterioration Contact with service
13.4.13 Error 20 (OL-1): Converter Overload
Possible reason Solution
Long time overload Reduce overload time, reduce load
Wrong settings of V/f curve related param-
eters
Adjust settings of V/f curve related parameters
Motor power and frequency converter
power do not match
Motor power has to match with frequency converter power
Overload happens at lower speed
● Reduce load at lower speed
● Reduce the carrier frequency (C0.05)
● Use a frequency converter with larger power
Excessive load, excessive short Acc. /
Dec. time or cycle
● Adjust load, acceleration/deceleration time or cycle
● Use a frequency converter with larger power
Low mains voltage Check input power supply
Excessive torque compensation
Reduce torque compensation setting (C2.22) till the cur-
rent decreases
Excessive overexcitation braking factor Reduce [E0.55]
13.4.14 Error 21 (OH): Converter over Temperature
Possible reason Solution
Frequency converter (heat sink) tempera-
ture is higher than max. allowable temper-
ature 85 °C
● Reduce ambient temperature, improve ventilation and
heat dissipation; clear dust, cotton wadding in air ducts;
check fan and its power supply connection (if available)
● Reduce load if necessary
● Reduce carrier frequency (C0.05)
Temperature detection circuit error Contact with service
EFC x610 Series Bosch Rexroth AG
Diagnosis
DOK-RCON03-EFC-X610***-IT05-EN-P
245/389
To Next Page
Loading...
Need help?
General
