OVER TEMPERATURE FAULT

What does 908 mean?

The calculated SCR junction temperature is above 125 degrees Centigrade. This is derived from the thermistor heat sink measurement combined with the heating effects of measured armature output current on the SCRs. This fault will not shut down the drive.

• Ambient temperature too high.
• Clogged air filter in cabinet.
• Clogged heat sinks.
• Cooling fan failure.

Click steps to track your progress.

1. 1

   Check ambient temperature for high levels and address the underlying cause.

2. 2

   Clean or replace the air filter in the cabinet.

3. 3

   Clean the heatsink fins.

4. 4

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