Honeywell thermostat ST9100C 7 Day Single Channel Time Switch User Manual

11

OPerATING YOUr ST9100C
The extra Hour Function
The eXTrA HOUr button allows you to switch the system ON for up to 3 extra hours without  altering  the  programme.  Pressing  the  button  once  will  give  one  extra  hour.  The  LoT™  Display  will  display  the  message  ‘+  1  HOUR’,  to  confirm  the  button  has been pressed. 
When  the  green INDICATOr  LAmP  is OFF,  pressing  the eXTrA  HOUr  button switches the system ON for just one hour.
When  the  green INDICATOr  LAmP  is ON,  pressing...

12

FINe TUNING YOUr ST9100C
Changing from Am/Pm Time Display to the 2 Hour Clock
Your  ST9100C  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 the...

1

FINe TUNING YOUr ST9100C
To enter Installer mode:
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  from...

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FAQ AND TrOUBLeSHOOTING
How  do  I  set  the  time  only,  if  the  ST9100C  clock  is  not correct?
Your ST9100C 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/TIme 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 message ‘IS TIME OK?’...

1

SymptomPossible Causeremedy
ST9100C has a blank LCD displayNo power to the systemCheck that there is power to the system
Fault in ST9100CCall Installer
ST9100C indicates that the system is ON, but radiators are cold and/or taps are running with cold water.
Temperature controls are switched off or set too low
Check that the temperature controls in the system are set to appropriate levels
Boiler or other system controls have malfunctioned
Call Installer
ST9100C shows the message ‘INTERNAL FAULT’...

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1 

150022737-002 A
CONFIGUrATION & SerVICe 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
1-day or 5/2-day or 7-day operation1-day operation
5/2-day operation
7-day operation
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...