‘Clock failure’ will appear on the screen if the in-built battery has gone flat. This specially occurs if the power has been turned off to the controller for a long period.
‘Clock failure’
Procedure
• Leave the power connected for at least 48hrs to re-charge the battery (one whole week is more realistic dependent on the age of the battery itself).
If the notification does not clear within a whole week on non-interrupted power, continue with the procedure below.
WARNING: The next section must be carried out by a qualified person to current IEE regulations for Electrical Installations and any local regulations which apply.
WARNING: Always switch off and disconnect electricity supply to the controller and the heater before carrying out any internal inspection.
• Check the ribbon cable connections between the two pcb’s is making good contact.
If the above does not resolve the issue, the battery may have failed.