Troubleshooting Guide
This is a quick guide to help diagnose and cope with possible problems with the programmer. For further assistance,
please contact your Installer.
Symptom Possible Cause
The programmer has a blank LCD
display
The programmer indicates that
Heating and/or Cooker is ON, but
radiators are cold and/or taps are
running with cold water
The programmer shows the message
‘INTERNAL FAULT’
No power to the
heating system
Temperature controls are
switched off or set to low
Fault in
Programmer
Remedy
Check that there is power to the
heating system
Call Installer
Boiler or other system
controls have malfunctioned
Check that the temperature controls in
the system are set to appropriate levels
Call Installer
Fault in the programmer Call Installer
Configuration Data (to be completed by Installer)
The table below is for the Installer to complete to indicate how your Programmer has been configured.
Configurable Features Options
24 hr or am/pm clock display
Display backlight
operation
Automatic time
change
am/pm display
24hr display
Installer Configured
(tick appropriate box)
Off
On if button pressed
On continuously
Enabled
Disabled
1-day or 5/2-day or
7-day operation
1-day operation
5/2-day operation
7-day operation
Number of ON/OFFs per day
2 on/offs per day
3 on/offs per day
Default programme
A = standard
b = at home
C = economy
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