14.4.21 Error 38 (AibE): Analog Input Broken Wire Detection
Possible reason
Solution
Analog input wire is disconnected
Check wiring of AI1, AI2 and EAI
14.4.22 Error 39 (EPS-): DC_IN Power Supply Error
Possible reason
Solution
DC_IN power supply voltage is out of range
20...28 V
Check the voltage supply on DC_IN terminal and make sure the volt‐
age is within the range of 20...28 V
14.4.23 Error 40 (dir1): Forward Running Lock Error
Possible reason
Solution
Direction control [E0.17] = '1: Forward only'
Direction command is reverse
Correct the parameter setting
14.4.24 Error 41 (dir2): Reverse Running Lock Error
Possible reason
Solution
Direction control [E0.17] = '2: Reverse only'
Direction command is forward
Correct the parameter setting
14.4.25 Error 42 (E-St): Terminal Error Signal
Possible reason
Solution
External error caused by input signals via external
terminals
Check external terminals status
Wrong wiring / setting of multi-function external
terminals
Ensure the right external signals have been connected correctly to the
right multi-function external terminals which are assigned for external
error input ([E1.00]...[E1.04] = 32, 33)
Converter stop caused by E-Stop active command
via Modbus communication
Check the stop command via Modbus communication (0X0088: stop
according to parameter setting; 0X0090: E-stop active). If converter re‐
ceives 0X0090 , E-St will be displayed
14.4.26 Error 43 (FFE-): Firmware Version Mismatch
Possible reason
Solution
Operating panel may be placed to the frequency
converter with older/newer firmware
Contact with service
Control board may be removed to another device
Contact with service
Extension card may be installed to the frequency
converter with older/newer firmware
Contact with service
Bosch Rexroth AG
DOK-SYTROX-DRN5020****-IT05-EN-P
130/143
Frequency-Controlled Pump Drive System Sytronix DRn 5020
Troubleshooting