
13.4.19 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 protection
circuits (C1.72, C1.73, C1.74)
13.4.20 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 name-
plate
No connection of converter and motor
Check motor cable connections
13.4.21 Error 38 (AibE): Analog Input Broken Wire Detection
Possible reason
Solution
Analog input wire is disconnected
Check wiring of AI1, AI2 and EAI
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
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
VFC 3210
Bosch Rexroth AG
Diagnosis
DOK-RCON04-VFC3210****-IT01-EN-P
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