F0021 CURR MEAS Fault in ABB ACS550 Drive
How can resolve problem F0021 CURR MEAS Fault in ABB ACS550 Drive ?
Internal fault. Current measurement is out of range
Change CT, this problem comes when drive CT faulty.
Also check CT feedback voltage on 20 pins connector (9,10,11 upper layer from transformer side) you get 7V DC voltage which is CT feedback.
- if you get different voltage then change CT.
- After change CT fault comes then change IC 33074 IC.
# Another way to check CT is first remove CT then power-up drive if fault not coming then CT faulty.