Fault code

INVT GD270 OT Motor overtemperature fault

Diagnostic context

What OT means on INVT GD270

OT identifies a motor overtemperature fault on the GD270. The manufacturer troubleshooting table covers the motor overtemperature input, temperature-detection resistance and prolonged motor overload or abnormal operation.

Operating context: The checks focus on both the temperature-sensing signal and the motor itself. Verify the input terminal and sensor before evaluating prolonged overload and motor condition.

This diagnostic context is an editorial explanation. The possible causes and recommended checks below are the verified manufacturer troubleshooting content.

Possible causes

  • Motor overtemperature input terminal is valid.
  • The temperature detection resistance is abnormal.
  • Long-time overload running or exception occurred.

Recommended checks and actions

  • Check the wiring of the motor overtemperature input terminal (terminal function 57).
  • Check whether the temperature sensor is proper.
  • Check the motor, and perform maintenance on the motor.

Technical source

INVT GD270 Manual EN - Fault OT — page 281