The first is the fault of the fire detector circuit, once it occurs to check whether the circuit to the fire detector wiring is intact, fire detector has not been removed, terminal monitor is not damaged, etc. , most of the reasons are in these aspects. If the fault can not be eliminated for a while, in order not to affect the normal use should immediately notify the manufacturer to repair as soon as possible.
If you encounter the fault of the main power supply of the fire detector, the transmission power supply, fuse wire and contact integrity is the object of inspection, any one of the problems will cause the power supply can not function properly. This is to start the backup power supply, but the backup power supply also has the possibility of failure, so all have to prevent.