Description
The drive has detected operation at low stage for a long period of time and is increasing the compressor speed to temporarily improve lubrication of the compressor.
Cause
The cause for this issue is that the compressor has been operating for too long at very low output/speed. This is normal operation and should not be considered a problem when detected.
Solution
Normal operation. Lube protection becomes active if the compressor is running at low stage for a very long period of time (>2hrs).