This occurs when the ES-PS powering the IDNAC card has tripped its main overcurrent. A fault on a bell or output circuit may display a variety of specialized messages in addition to the basic trouble message. A "short" or "open" condition may also be identified. Check for faults on the circuit. A single SLC is drawing above rating. There is one or more extra devices, for example, devices. The 4100 Series was released onto the Australian Market in 1990. The first version supported 512 devices or points. The 4100A was a localized version of the 4100+ & has the FireFighter Interface. When a fire alarm panel system trouble signal activates, it indicates that a non-fire fault condition exists within the fire alarm system, signaling that a component or circuit isn't functioning as intended and requires investigation and repair to maintain full operational readiness. If you have any issues I would be happy to guide you over the phone at 9736631011 or through email at info@digitize-inc. com "What. Although fire alarm systems are designed to keep you and your business safe, it can be unnerving to suddenly see random things lighting up on your device's panel if you don't know what they mean.