13.4.20 Error 35 (SPE-): Speed Control Loop Error
Possible reason Solution
The speed loop difference is outside
[C3.26] over a time of [C3.25]
● Set appropriate C3.25 and C3.26 according to actual
working condition
● Check motor nameplate parameters(C1 group)
● Check if the torque limitation level is too low
● Motor control loop parameters error
– Motor parameter tuning
– Set relevant C3 group parameters according to ac-
tual working condition
13.4.21 Error 38 (AibE): Analog Input Broken Wire Detection
Possible reason Solution
Analog input wire is disconnected
● Check the setting of analog input broken wire protec-
tion E1.61
● The converter not receive analog input signal
– Check the wiring of AI1, AI2, EAI1 and EAI2
– Check analog input signal source
– Analog input port broken, replace the control board
or converter, contact with service
13.4.22 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 voltage is within the range of 20...28 V
● Control board detection circuit of 24V is broken, re-
place the control board or converter, contact with serv-
ice
13.4.23 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
Rexroth Frequency Converter EFC x610
Series
477/653
Diagnosis
R912005854_Edition 09 Bosch Rexroth AG
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