ABB A120 fault code meaning
ABB / A120
Series: DCS500B
Arm.curr.dev.alarm
DC drive
Meaning:
Possible causes
Source: DCS500B Operation Manual Chinese edition (official site)
Series: DCS880
Overvoltage
DC drive
Meaning: protectionactive (Overvoltage protection enabled) Overvoltage protection DCF806 is enabled, and the converter is blocked.
Possible causes
Source: DCS880 Firmware Manual_3ADW000474R P351