INFORMATION PREHEAT

Set Appliance State:

1. This appliance has a pre-heat function to reduce the time taken to produce hot water.
2. The appliance will memorise whether the preheat function is turned on or off through boiler resets and mains power off / on.
3. This diagnostic model requires the pre-heat function to be turned OFF (ECO button illuminated) unless a test page specifically states otherwise.
It is important to follow this instruction otherwise incorrect diagnosis will occur.

WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure

Mains Power On

Reset appliance if it is in lockout (you may wish to
take a note of the fault code displayed).
If the eco button is not illuminated hold down the
"eco" button for approx 5 seconds until the button illuminates.
Note:
If the appliance immediately returns to lockout it will not be possible to change the boilers eco setting.
Use the appropriate fault code diagnosis by clicking here.