Set Appliance State:
Gas Off
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to AC Volts 
Gain access to PCB (use Insulation Mat as required)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Allow boiler self check to complete.
Hold down the spanner and ECO buttons for at least 5 seconds to enable service mode.
(MAX should be shown at the bottom of the display).
Measure the voltage across the brown and blue pins marked 5.5 and 5.6 at X11 connector on the PCB using the test pins above the connector.
Mains voltage expected.
Hold down the spanner and ECO buttons for at least 5 seconds to enable service mode.
(MAX should be shown at the bottom of the display).
Measure the voltage across the brown and blue pins marked 5.5 and 5.6 at X11 connector on the PCB using the test pins above the connector.
Mains voltage expected.
Isolate as per TOPs P4
and refit as necessary