Technical data
12-18 Startup, Operation and Maintenance Rexroth IndraDyn H
DOK-MOTOR*-MBS-H******-PR02-EN-P
Excess temperature of motor housing
The housing temperature of the motor climbs to unusually high values.
CAUTION
Damage of motor or machine by restarting after
excess motor temperature!
⇒ Liquid-cooled motors should not be restarted
immediately or with cold coolant after failure of the
coolant system. Danger of damage!
⇒ Before restarting, wait until the motor temperature
drops to approx. 40°C.
1. Failure in the coolant system.
2. Original processing cycle has been changed.
3. Original motor parameters have been changed.
4. Motor bearings worn or defective.
1. Check the coolant system. Clean or rinse the cooling circuit if
required. Contact the machine manufacturer if the coolant system
fails.
2. Check the layout of the drive for changed requirements. If
overloading occurs, stop operation. Danger of damage!
3. Reset to the original parameters. Check the layout of the drive in the
case of changed requirements.
4. Contact the machine manufacturer.
High motor temperature values, but housing temperature is normal
The diagnostics system of the drive controller shows unusually high
values for the winding temperature via the display or control software.
However, the motor housing has a normal temperature.
1. Wiring error or cable break in sensor cable.
2. Diagnostics system defective.
3. Winding temperature sensor failure (PTC).
1. Check the wiring and connection of the temperature sensor
according to the connection plan.
2. Check the diagnostics system on the device controller or the control.
3. Check the resistance value of the temperature sensor using a
multimeter.
• Switch off the system and await the discharging time.
• Sever the connection of the temperature sensor on the control
device. Set the measuring instrument to resistance measurement
and connect the core pair with the measuring instrument (the
sensor cable is also checked in this case). Check the values
according to the characteristic curve in chapter 9 ”Application
Notes”.
Status
Possible causes
Corrective measures
Status
Possible causes
Corrective measures