T200 User's Manual SECTION 10: TROUBLE-SHOOTING GUIDE
PAGE 10-16
10.5.2 Warning Type: U2 (Motor Temperature Warning) on 7-Segment Display
The U2 warning is displayed when the motor temperature exceeds 130° C. The T200 can generate reduced torque in the
motor when U2 is present.
Table 15: Causes of U2 on 7-Segment Display
Cause Check/[Correction]
Inadequate Thermal
Contact between
Motor and Mounting
The motor is rated to operate with a maximum temperature rise of 100° C above ambient,
when operated at its rated continuous power level. This depends upon suitable thermal
contact between the motor and its mounting. Check the amount of physical contact between
the motor and the surrounding mounting metalwork.
[Provide improved thermal conduction between the motor and its mounting if possible.]
Inadequate cooling
airflow over the
motor.
There is inadequate cooling airflow over the motor.
[If possible, duct extra airflow from a cool ambient area over and around the motor.]
Excessive Static
Load
The machine bearings or other parts may have become seized or severely worn. This can
cause extra friction or load torques.
[Check the freedom of rotation of the load, including bearing wearing and load alignment.]
Movement Duty
Cycle Excessive
The acceleration and deceleration of the movement, as well as the frequency of movement
may be excessive for the motor.
[Decrease the duty cycle, by reduction of the acceleration and deceleration, and/or the
frequency of the movement]
Motor Undersized
The motor is not rated to handle the current duty cycle required by the application. Use the
?LMR Hand Held terminal command to measure the motor phase r.m.s. current. Check if
this very near the rating of the motor.
[Install a motor with a high current rating if this is suitable for the application]
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