Power unit: Internal overtemperature

What does F30036 mean?

The internal temperature of the drive converter has exceeded its permissible operating limit. This critical condition is typically caused by insufficient cooling, a fan failure, sustained overload, or an excessively high ambient temperature. The fault triggers an OFF2 reaction, shutting down the drive, and cannot be acknowledged until the internal temperature has fallen below the permissible limit minus 5 K.

• Internal cooling fan(s) completely failed or severely degraded, leading to critical loss of forced convection.
• Extensive dust and debris buildup on power components and heatsinks, acting as an insulating layer.
• Sustained motor overload condition (r0027) exceeding the drive's continuous rating for extended periods.
• Improper drive sizing for the application's duty cycle or peak load requirements, leading to chronic overheating.

Click steps to track your progress.

1. 1

   Measure the internal power unit temperature (r0037, r0035) and compare against trip limits to identify peak values.

2. 2

   Power down the drive and visually inspect all internal cooling fans for free rotation, signs of damage, or excessive noise.

3. 3

   Thoroughly clean all heatsinks, power modules, and internal air passages using an industrial vacuum or compressed air (power off).

4. 4

   Measure motor current (r0027) and drive output power (r0029) to confirm operation within continuous ratings.

5. 5

   Verify the thermal overload settings for the motor (P0610, P0611, P0614) are correctly configured to protect the system.