55
to compressor cooling. Variable speed control oers the ability to match the cooling capacity to the
actual need. Costs are reduced through direct energy savings of operating at a lower speed. The
drive can operate a variable capacity compressor over a wider range. Other advantages of the VFD
are limiting the number starts and reduced start system shock thus reducing peak energy demand
and system wear. Below is a gure showing the VFD control display and some general instructions
required to charge the unit and monitor any alarms.
The local control panel (LCP) for the VFD drive is the combined display and keypad on the front of the
unit. The LCP has several user functions:
• Start, stop, and control speed when in local control mode
• Display operational data, status, warnings and cautions
• Programming frequency converter functions
• Manually reset the frequency converter after a fault when auto-reset is inactive
To Next Page
Loading...
