Honeywell thermostat ST9100S 1 Day Service Time Switch User Manual

11

OPer ATING YOU r  ST9100S
Overriding the Operation Without Changing the Programme
In AUTO and ONCe operating modes, the OVerr ID e button switches the system ON or OFF without altering the programme. 
When the indicator lamp is ON, pressing the OVerr ID e button switches the system OFF until the next programmed ON time.
When  the  indicator  lamp  is OFF,  pressing  the OVerr ID e  button  switches  the system ON until the next programmed OFF time.
The LoT™ Display will provide you with information...

12

FINe  TUNING YOU r  ST9100S
Changing from Am /P m  Time Display to the 2   Hour Clock
Your  ST9100S  can  operate  on  the  12  hour  AM/PM  or  24  hour  clock  formats.  To change the format, ensure the slider is in the rUN position then press and hold the   and  buttons together for about 2 seconds. Ignore the ‘NOT VALID’ message that will appear briefly. All the displayed times will be automatically changed to the new format.
Repeating this procedure will change the clock display back to...

1

FIN e  TUNING YOU r  ST9100S
To e nter Installer  m ode:
a. Ensure the slider is in the rUN position, then press and hold  and  buttons together for 8 seconds. Ignore the ‘NOT VALID’ message that is displayed for a few  seconds.  The  message  ‘SET  UP  MENU’  will  show  briefly,  followed  by  ‘SET INSTALLER OK ?’
b.  Press the  button to take you into the Installer Mode Parameter Menu.
c.  Parameter  1  is  now  available  to  change.  This  is  to  allow  you  to  change  the clock  format...

1

FAQ AND T r OUBL e SHOOTING
How  do  I  set  the  time  only,  if  the  ST9100S  clock  is  not correct?
Your  ST9100S  contains  a  very  accurate  digital  clock  that  is  factory  pre-set.  Should you ever need to change the time, just follow this procedure:
a. Move the slider to the DAY/TI me position.
b. Keep  pressing  the  green   button  until  the  message  ‘SET  THE  TIME’  is displayed.  To  change  the  time,  press  the    or   buttons  until  the  correct time is shown. The...

1

Troubleshooting Guide
This  is  a  quick  guide  to  help  you  diagnose  and  cope  with  possible  problems  with ST9100S. For further assistance, please contact your Installer.
FAQ AND T r OUBL e SHOOTING
SymptomPossible Causeremedy
ST9100S has a blank LCD displayNo power to the heating systemCheck that there is power to the heating system
Fault in ST9100SCall Installer
ST9100S indicates that the system is ON, but radiators are cold and/or taps are running with cold water.
Temperature...

16

BOILer  S er VIC e   rem IND er
By  Law,  your  gas  boiler  should  be  inspected  once  a  year  to  ensure  it  is  operating safely.  Your  ST9100S  Programmer  has  a  range  of  features  designed  to  help  make sure this service is carried out at the correct time. These features will be programmed by your Installer, maintenance Engineer, or Landlord.
•  If  it  has  been  set  to  do  so,  ST9100S  will  display  a  message  on  the  screen  to remind you that a boiler service is due.
•  If...

17

Shut-down
If  your  ST9100S  shows  the  words “Ser VIC e  DUe ”  and “OFF”  then  your  boiler  service  is OVer DU e and the boiler has been automatically switched  off  to  ensure  your  safety  –  you  should arrange an immediate service visit.
If set to do so, it may be possible to obtain limited use  of  the  boiler  by  pressing  the eXT r A  HOU r button.  Each  button  press  will  allow  operation  of the  boiler  for  1  hour  at  a  time,  and  the  screen will  display  the  message “On...

150022737-003 A
CONFIGU r ATION & S er VIC e  DATA
Configurable FeaturesOptionsInstaller Configured (tick appropriate box)
24hr or am/pm clock displayam/pm display
24hr display
Display backlight operationOff
On if button pressed
On continuously
Automatic time changeEnabled
Disabled
Number of ON/OFFs per day2 on/offs per day
3 on/offs per day
Default programmeA = standard
b = at home
C = economy
Configuration Data (to be completed by Installer)
The  table  below  is  for  the  Installer  to...