Technical data

Rexroth IndraDyn T Operating Torque Motors 12-17
DOK-MOTOR*-MBT********-PR03-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
increased motor temperature!
⇒ Liquid-cooled motors should not be restarted
immediately after failure of the coolant system and
an increased motor temperature or supplied with
cold coolant . Danger of damage!
⇒ Wait before restarting until the motor temperature
has dropped to 40° C.
1. Malfunction in the coolant system.
2. Original operating 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
malfunctions.
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 system 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.
Diagnostics system defective.
2. Winding temperature sensor malfunction (PTC).
1. Check the wiring and connection of the temperature sensor according
to the terminal diagram.
2. Check the diagnostics system on the drive device or the control unit.
3. Check the resistance value of the temperature sensor using a
multimeter.
• Shut down the system and wait for the discharging time to elapse.
• Disconnect the temperature sensor from the control device. Set the
measuring instrument to resistance measurement and connect the
wire pair with the measuring instrument (as a result, the sensor
cable is also checked). Check the values according to the
characteristic curve in chapter “Application Notes”.
Status
Possible causes
Measures
Status
Possible causes
Measures