EST EST3X - Signature device troubleshooting; Analog addressable devices and modules

Chapter 7: Service and troubleshooting
212 EST3X Technical Reference Manual
Table 62: Signature Series loop controller mapping errors
Problem
Possible causes
A m
apping error is detected on
the loop
• There is a discrepancy between the expected map and the
devices installed on the loop (serial number, personality
code, or device type)
• A device ID was incorrectly entered in the 3-SDU
• There are more than 124 T-taps on the loop
• There is excessive loop resistance
• There is excessive loop capacitance
• Devices on the loop are drawing too much current during
mapping
• Devices on the loop are not drawing enough current during
mapping
The s
ystem continues to
remap
the data loop
• An intermittent connection is
causing one or more devices to
lose then reestablish communication with the loop controller
• There is a defective device or detector base
A
device type error is detected
on the loop
There is a d
iscrepancy between the device type recorded on the
internal map and the device installed on the loop
Signature device troubleshooting
Module LED indicators
Each Signature Series module has a red and green status LED. These LEDs are
useful when trying to determine the communication and alarm or active status of
Signature devices.
Table 63: Signature Series module status LEDs
LED
status Device status
Green flashing
Normal communication
Red flashing
Alarm or active (either input of dual input modules)
Red a
nd green steady Stand-alone alarm or active (either input of dual input modules)
Common causes of Signature Series module and device
problems
Common causes for Signature Series modules and devices not responding
correctly or reporting trouble events are listed below.