Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Gain access to PCB (use Insulation Mat as required)
Ensure NO demands
Ensure NO demands
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1:
Measure the DC voltage between pin 3 (green) on
connector X5 and a suitable earth point.
Expect 3.7V DC with no demand.
Test 2:
Turn the hot water tap ON, ensure a flow rate above 3 l/min.
Repeat Test 1 again.
Expect 3.2V DC with a hot water demand.
Measure the DC voltage between pin 3 (green) on
connector X5 and a suitable earth point.
Expect 3.7V DC with no demand.
Test 2:
Turn the hot water tap ON, ensure a flow rate above 3 l/min.
Repeat Test 1 again.
Expect 3.2V DC with a hot water demand.
