Possible reason Solution
Excessive overexcitation braking factor Reduce [E0.55]
Wrong motor protection parameter set-
tings
Adjust settings of C1.74, C1.75 and C1.76 according to
actual motor situations
13.4.20 Error 31 (Ot): Motor over Temperature
Possible reason Solution
Excessive load or bad cooling
● Check load
● Provide a better cooling condition
Temperature sensor defect Check the motor temperature sensor feedback signal
Wrong motor protection parameter set-
tings
Different motor with different maximum temperature, set
motor protection parameters according to actual protec-
tion circuits (C1.72, C1.73, C1.74)
13.4.21 Error 32 (t-Er): Motor Parameter Tuning Error
Possible reason Solution
Motor power and frequency converter
power do not match
Motor power has to match with frequency converter power
Wrong setting of motor parameters
Correct motor parameters setting according to motor
nameplate
No connection of converter and motor Check motor cable connections
13.4.22 Error 33 (AdE-): Synchronous Motor Angle Detection Error
Possible reason Solution
Internal error occurs during sysnchronous
motor angle detection
Contact with service
13.4.23 Error 38 (AibE): Analog Input Broken Wire Detection
Possible reason Solution
Analog input wire is disconnected Check wiring of AI1, AI2 and EAI
13.4.24 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
EFC x610 Series Bosch Rexroth AG
Diagnosis
DOK-RCON03-EFC-X610***-IT05-EN-P
247/389
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