Set Appliance State:

Mains Power Off
CH Demand
CH Thermostat set to 70°C
WARNING! - Mains voltage is expected during test follow
TOPs P4 live testing procedure
Mains Power On

Observation:

Is the Water Pump running?
Notes:
1. If the pump vent plug is removed or loosened (depending on type of pump) care must be taken to ensure water does not cause damage.
2. The pump is not an integral part of the appliance and will be located elsewhere on the system.
3. Pump will not run if boiler is in lockout.