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Why does the display on my Altivar Drive blank?

Published date: 30 June 2020

Altivar Drive's display is blank

Product Line:
All Altivar drives
Display doesn't light up
Measure the input voltages (phase to phase) at L1, L2 and L3
Measure the DC bus at PA+ and PC-. DC voltage measurement should be ~1.41 times your line voltage. 
Measure the +24v and +10v supplies. Measure to COM, not ground.
If the DC bus is ok, but the 24Vdc or 10Vdc is missing, then could be a problem with the Main Control board and/or the Power Board of the drive.

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