I'd like to know the reasons for & against for installing a running capacitor on a Copeland scroll compressor.

Compressor : ZR34K3E-PFJ
Running capacitor : 50/370 MFD
Supply : 220V, 50Hz, single phase

The compressor is used in a heat-pump application, under terrible power supply conditions, with frequent power outages, brown-outs & so forth.

The system design has been set up to cope with this poor power & protect the heat-pump system, as far possible.

Thank you for your applied wisdom.