E250 Drive Overtemp. Prewarning; E251 Motor Overtemp. Prewarning; E252 Bleeder Overload Prewarning - Bosch Rexroth OptiFeed-FS EcoDrive 03 FLP04VRS Functional Description

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Diagnostic Message Descriptions

E250 Drive overtemp. prewarning

E251 Motor overtemp. prewarning

E252 Bleeder overload prewarning

The temperature of the heatsink in the drive controller has reached the
maximum permissible temperature. The drive controller complies with the
command value input for a period of 30 seconds. This makes it possible
to bring the axis to a standstill via the control system without disruption of
the process (e.g., close the operation, leave the collision area, etc.).
After 30 seconds, the response set in parameter Parameter A119, Best
possible deceleration will be performed by the drive controller.
Cause:
1. Failure of the drive's internal blower.
2. Failure of the control cabinet's climate control.
3. Incorrect control cabinet sizing in regards to heat dissipation.
Remedy:
For 1. If the blower fails, replace the drive controller.
For 2. Restore climate control feature in the cabinet.
For 3. Check the sizing of the control cabinet.
As soon as the temperature warning threshold (145°C) is exceeded, the
E251 warning is output, and the drive continues to follow the setpoint
specification.
This state can last for a long time without the drive powering down. Only
when the temperature error threshold is exceeded, will the drive
immediately power down.
See also F219 Motor overtemp. shutdown.
Cause:
The motor is overloaded. The effective torque required by the motor has
been above its allowable continuous torque level at standstill for too long.
Remedy:
Check the motor rating. For systems which have been in use for a long
time, check to see if the drive conditions have changed (in regards to
contamination, friction, moving components, etc).
Cause:
The braking resistor (bleeder) in the drive controller is charged with
regenerative energy from the motor by about 90%. The bleeder overload
prewarning indicates that an overload of the bleeder is expected if the
regenerative energy continues to increase.
Remedy:
Reduce the acceleration values or velocity and check the drive rating if
necessary.
ECODRIVE03-FL*-04VRS
DOK-ECODR3-FL*-04VRS**-FK01-EN-P