Cause : PPCC LINK comes when fiber optic link to INT board is faulty. This link is crucial for exchanging control signals and data between the control unit and the power section of the drive.

The code 5210 in your ABB ACS800 drive indicates a fault related to the PPCC Link, which is the communication link between the Control Board and the INT Board within the inverter module.

1. Check fibre optic cables or galvanic link.
2. With frame sizes R2-R6 link is galvanic.
3. If RMIO is powered from external supply, ensure that supply is on. See parameter 16.09 CTRL BOARD SUPPLY.
4. Check signal 03.19.