EST LSS4 - Page 101

Problem
Table
No
RSA4
annunciators
operate
Some
annunciators
operational,
othersnot
operational
SomeRSA
modules
operate
incorrectly
Maintenance&
Troubleshooting
5-7:
Remote
Annunciator
Troubleshooting
Possible
Cause
1)24VDC
power
missing.
2)
Multiple
annunciatorssetat
same
sub-address.
3)
RS-485
circuit
open,
shorted.or
mis-wired.
4)
RSA4-CPU
jumperJP1
improperly
installed.
5)
Incorrect
LSS4
master
panel
firmware.
1)24 VDC
power
missing.
2)
RS-485
circuit
openor
mis-wired.
3)
Defective
RS-485
Interface.
4)
RSA4-CPU
addressed
incorrectly.
5)
RSA4-CPU
jumperJP1
improperly
installed.
6)
Ribbon
cablelooseor
defective.
7)
RSA4-CPU
Module
defective.
1)
RSA4-COMor
SLU-16R
group
addressset
incorrectly.
2)
Ribbon
cable
loose.
LSS4
Installation,
Operation,and
Maintenance
Manual
55