A1218 / F1219 Slot B AI4 Cable Disconnection Analog input signal AI4 set to 4 to 20 mA mode is out of range. fault in WEG CFW900 Drive
These codes indicate a Slot B Analog Input 4 Cable Disconnection. This means the 4-20mA signal on expansion Analog Input 4 dropped below the safe threshold.
Cause:
- Analogue input loop cable is broken (the read value remained under 2 mA for longer than 5 seconds).
- Poor contact at the signal connection terminal blocks.
Remedy:
Check loops for physical line breaks. Clean and secure terminal connections.
