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Inspection and Installation
22
Disconnect EMC Filter for Delta-Connected Power
Installer/startup technician needs to disconnect the EMC filter on the VFD to ensure proper operation
if the Liebert VFD Control Condenser will be operated with Delta-connected power.
1. Disconnect the power supply before working on the unit.
2. Open the electrical panel cover and locate the VFD (Refer to Figure 20).
3. Using Figure 18, locate the small black plastic tab immediately to the right of the wiring
connection block of the VFD control
4. Pull the tab to fully extend it, disconnecting the EMC filter from the circuit.
Figure 18 Disconnecting EMC filter for operation with Delta-connected power
Internal
EMC filter
Internal
EMC filter
Tab fully inserted:
EMC filter fitted
A
B
Tab fully extended:
EMC filter disconnected