Service and troubleshooting
8.48 EST3 Installation and Service Manual
Table 8-30: Mapping errors
Fault Possible causes
Mapping Error 1. A discrepancy between the internal map and the devices
installed on the Data Circuit (serial #, personality code, or
device type)
2. Device ID entered incorrectly into SDU database
3. More than 124 “T-taps” on a data circuit
4. Excessive circuit resistance
5. Excessive circuit capacitance
System continues to re-map
data circuit
1. An intermittent connection causing one or more devices to
loose then re-establish communication with the Signature
controller module
2. A defective device or detector base
Device Type Error 1. There is a discrepancy between the device type recorded on
the internal map and the device installed on the Data Circuit
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