l 
<F3>  Key  -  Allows  you  to  choose  between  Zone  Coding  and  Zero  Coding.  In  Zone  Coding,  a  PNIS 
code  for  the  tested  zone  is  played  (e.g.,  Zone  12  is  code  l-2).  In  Zero  Coding,  two  quick 
pulses  (code  0) are  heard.  In both  cases,  when  a trouble  is reported  from  a zone,  the  signal 
circuits  turn  ON  for  4 seconds. 
l 
eF4>  Key  -  Enables/disables  silent  Walk  Test”.  When  this  key  is  pressed,  it  toggles  the  system  to 
audible  Walk  Test’“,  where  the  signal  circuits  are  turned  ON  to  play  the  codes  selected  with 
the  <F3>  key,  described  above.  Silent  Walk  Test’”  is  used  in  conjunction  with  the  logging 
function  when  audible  signals  might  disturb  the  building  occupants. 
During  the  Walk  Test’“,  the  first  line  of  the  LCD  shows  changes,  including  the  status  of  the  device  under  test.  The 
second  line  of the  LCD  shows  device  status. 
Walk  Test’”  OPERATION 
When  the  4020  system  is  placed  in  Walk  Test’”  mode,  any  zone  in the  active  Walk  Test’”  group(s)  can  be  tested  in 
any  order.  If zone  coding  is enabled,  there  is an  advantage  in testing  all  devices  within  one  zone  before  going  on  to 
the  next  zone. 
You should  simulate  an alarm  and  trouble  condition  for  each  device  being  tested.  If you  are  using  an audible  or visual 
indication,  wait  for  it to  clear  before  you  test  the  next  device.  Otherwise,  wait  for  an  appropriate  amount  of  time 
(based  on  the  system  reset  delay)  before  moving  on  to  the  next  zone.  The  LED  on  a smoke  detector  helps  you  in 
this  area,  because  it indicates  when  the  alarm  is sensed,  and  when  the  detector  resets.  If zone  coding  is enabled, 
verify  that  the  code  heard  or seen  is correct. 
Walk  Test’”  FEATURES 
The  Walk  Test’”  function  has  the  following  features: 
l 
Abort  Audible  and  Delay  On  Reactivation 
l 
Active/Not  Active 
l 
Auto  Abort  On  Alarm 
.  Auto  Abort  On  Time-out 
l 
Control  Lists 
l 
Delay  Before  Reset 
l 
Log/No  Log  (Logging  Option) 
l 
Monitor  Zone  List 
l 
Programmer  Configuration 
l 
Sig/No  Sig  (Silent  Walk  Test”  Selection) 
l 
System  Trouble 
l 
Trouble  Audible 
l 
Zone  Code/Zero  Code. 
These  features  are  discussed  in the  following  paragraphs. 
ABORT  AUDIBLE  AND  DELAY  ON  REACTIVATION 
Whenever  a Walk  Test”  group  is aborted,  either  manually  or  automatically,  the  control  list  sounds  the  abort  code  (O- 
O-O) to  indicate  that  the  group  is  going  back  into  service.  If  a  control  point  in  the  list  is  already  active,  possibly 
because  another  alarm  has  come  in,  the  abort  code  will  play  before  the  alarm  message.  The  group  is put  back  into 
normal  operating  service  60  seconds  after  the  abort  signal  is heard  (if there  are  signals  in the  control  list).  This  delay 
protects  against  an  unwanted  alarm  should  an  auto  abort  occur  while  a device  is being  tested. 
53 
Technical Manuals Online! - http://www.tech-man.com