Set Appliance State:

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

Observation:

Tap reset button to skip self check if necessary.
Hold the radiator +/- buttons simultaneously
for 5 seconds to set boiler to service mode.
Using test meter dial and stop watch measure the gas rate.
Gas rate should be as per appliance data badge.
Note:
Appliance should burn at full rate throughout test, if appliance modulates or cuts out select that option below.