Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to AC Volts Set meter to measure AC Volts
CH Demand
Expose wiring connections at pump, use insulation mat as required
Note. There are a vast amount of pumps on the market,
image is for illustration purposes only

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

Measurement:

Measure for A/C voltage across the brown and blue wires at the pump.
Expect voltage, mains voltage.