SC at card
Loop wiring short circuit
The panel has detected a short circuit on loop wiring associated with a loop card.
What this code means
The panel has detected a short circuit on loop wiring associated with a loop card.
Possible causes
- Short circuit in loop field wiring
- Damaged cable
- Incorrect connection or damaged field device
Common symptoms
- SC at card message
- Fault indication
- Devices beyond an isolator may be affected depending on system design
Checks to make
- Identify the affected loop/card from the panel message
- Locate the section of field wiring containing the short circuit
- Repair the fault and confirm normal communication is restored
Safety
- Loop isolation and testing should be performed by competent fire-alarm engineers with suitable impairment controls in place.
Model notes
The displayed message may include the card/loop number.