ause of map faults
- Loose wire connections on detector bases, module terminals, at the SLC card, or at a T-tap.
- Over-tightening a detector base onto the backbox,causing it to warp, resulting in bad or intermittent connections with the detector head.
- Replacing like devices in a SLC that has been left balanced.
- Replacing devices with models that differ from the ones removed.
- Adding new devices onto an existing SLC.
- Rewiring an existing SLC.
- Balanced maps.
- Defective devices.
- More T-Taps in the SLC than the maximum allowed for the system.
- More devices in the SLC than the maximum allowed for the system.
- Resistance or capacitance in the field wiring in excess of that supported by the system.
- Reversed polarity. Connecting the SLC+ wire to the device SLC− terminal.
following this causes should help you identify the root of map fault.