OVER TEMPERATURE FAULT

What does 908 mean?

The calculated SCR junction temperature, derived from thermistor heat sink measurements and the heating effects of the measured armature output current, has exceeded 125 degrees Centigrade. This fault will not shut down the drive.

• Ambient temperature surrounding the drive cabinet is excessively high.
• The air filter within the cabinet is clogged, restricting airflow.
• The heatsink fins are clogged with dust or debris, impairing heat dissipation.
• Failure of one or more cooling fan(s) in the power cube.

Click steps to track your progress.

1. 1

   Verify the ambient temperature in the vicinity of the drive cabinet.

2. 2

   Clean or replace any clogged air filter(s) in the cabinet.

3. 3

   Clean the heatsink fins to improve heat transfer.

4. 4

   Replace any defective cooling fan(s) located in the power cube.