Cycling rate and minimum running times

In contrast to direct-on-line start, starting with a frequency inverter does not lead to increased thermal load on the motor. This allows a higher number of compressor starts: Up to 12 starts per h are possible, regardless of the compressor or motor. (With other starting modes, a maximum of 4 .. 8 starts per h are possible, see operating instructions).

Minimum running time of the compressors should be 5 min, this is independent of the starting mode. Single shorter operating cycles are possible, but operation with repeated shorter operating cycles should be avoided to prevent a lack of oil in the compressor.

When operating with a frequency inverter, the capacity control slider does not have to be completely unloaded before the next start. Therefore, the minimum pause time can also be significantly shorter. However, it must at least be ensured that the compressor has come to a complete standstill and is no longer rotating backwards.