Chapter 7: Troubleshooting 
Advisor Advanced ATSx500A(-IP) Installation and Programming Manual  297 
Device troubleshooting 
Advisor Advanced control panel 
 
The LCD keypad has all LEDs 
flashing, and displays the “System 
Fault” message 
The system data bus line may be connected incorrectly. 
The address links on the keypad may be incorrectly set. 
The panel is not communicating 
with keypads or expanders 
The system data bus line may be connected incorrectly. 
Keypad or expander numbers to be polled may not be 
programmed, or may not match the addresses set on the 
units. 
There is an earth loop in cabling. 
The keypads or expanders appear 
to be going offline and online 
(indicated by keypad or expander 
fail LED’s 
The system data bus line may be connected incorrectly. 
The termination may be incorrect. TERM links may not have 
been removed where necessary. See “Cabling” on page 22. 
Zone goes into alarm while the 
area is unset 
The zone is wired incorrectly causing a tamper condition 
(open circuit or short circuit) instead of active condition. EOL 
resistors may be installed incorrectly. 
See “Cabling” on page 22. 
The panel is not reporting to the 
central station 
The telephone line connections may be wired incorrectly. 
See “Cabling” on page 22. 
The central station receiver does not support the 
programmed protocol. 
The account number in “9.1.n.5 Accounts” on page 259 may 
be programmed incorrectly. 
The phone number for the central station receiver is wrong. 
No central station is programmed to report the event. See 
“9.1 Central station” on page 258. 
The zone is not programmed to be reported. See “4.1.n.6.24 
CS report” on page 177”.