Service and troubleshooting
EST3 Installation and Service Manual 8.75
Addressable analog device troubleshooting
Each addressable analog device has an integral Red LED. The
function of this LED is indicated in Table 8-42. The LED is
useful when trying to determine the communication and alarm or
active status of a device.
Table 8-42: Addressable analog device LEDs
LED Device status
Flashing Red Polling device
Steady Red Alarm or Active
Table 8-43 lists common troubles and possible causes for
addressable analog modules.
For detailed information on identifying and locating these errors,
use the SDU program’s Addressable Analog Diagnostic Tools.
Information about these tools appears later in this chapter.
Table 8-43: Addressable analog module troubleshooting matrix
Module not responding correctly
M500
MF
M501
MF
M500
CF
M500
XF
Possible Causes
x x x x Module is installed in the wrong location or is improperly
addressed
x x x x Module has not been entered into 3-AADC1 database
- - x - Break-off tab is set incorrectly
x x x x A ground fault has occurred on data circuit or (-) side of input /
output circuit
Module in trouble on 3-AADC1 circuit
x x x x Module is missing or is incorrectly connected to the circuit
x x x x ID error. Module has not been loaded into the 3-AADC1
database.
x x x x A ground fault has occurred on input or output circuit
- - x x The output circuit may be open, shorted, or incorrectly wired. A
polarized device may be installed in reverse. The EOL resistor
may be missing or incorrect
x x x x Missing or incorrect EOL resistor
Module incorrectly in alarm or active on CPU/LCD module
x x - - Initiating Device Circuit may be shorted, or an initiating device is
incorrectly installed
To Next Page
Loading...