214  Advisor Advanced ATSx000A(-IP) Installation and Programming Manual 
The expander appears to be going 
off-line and on-line (indicated by 
“Expander fail” on a LCD keypad) 
The termination may be incorrect. See “Cabling Advisor 
Advanced” on page 14. 
Some or all expander zones are 
permanently in tamper (or 
permanently in alarm if “8.5.1 Input 
mode” on page 152 is set to Single 
NO or Single NC). 
The zone numbers for the expander have been calculated 
incorrectly, and zone type numbers have therefore been 
assigned to the wrong zones in the zone database. See 
“Configuration” on page 22. 
The end-of-line resistors are wrong or the wrong resistor 
value is programmed in “8.5.2 EOL” (see page 152). 
There is a problem with wiring the zones. To check the 
voltage or resistor values, see “Zone connection” on page 
15. 
The ATS1202 expansion modules (if fitted) have the DIP 
switches incorrectly set. 
  Expansion module:    1st    2nd   3rd  
  DIP switch 1       On    Off    Off 
  DIP switch 2       Off    On    Off 
  DIP switch 3       Off    Off    On 
  DIP switch 4       not used 
Four-way relay modules (ATS1810) 
being used with the expander do 
not function, but some of the LEDs 
on the module appear to be 
permanently on 
DIP switch B on the expander is set to On (DIP switch B 
should only be On if 8-way relay (ATS1811) modules or 16 
open collector modules (ATS1820) are being used). 
8-way relay modules (ATS1811) or 
16-way open collector modules 
(ATS1820) connected to the 
expander do not function 
DIP switch B on the expander has not been set to On.