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What should I check for if I have no display on an Altivar drive?
All serial numbers for Altivar Drives
Perform this basic steps
Check line voltage by measuring L1, L2, L3 on the drive itself
Check DC Bus by measuring PA to PC and PO to PC (most drives)
Reseat terminal card (ATV61/71 only)
Remove cable from Modbus port if present
Check +24 to COM and +10 to COM (DC voltage only)