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)
Ease connector slightly off the PCB to expose test point
Ease connector slightly off the PCB to expose test point
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1:
Hot water tap OFF
Measure the DC voltage between Pin 1 (White)
and Pin 3 (Blue) on connector CN12
Expect either 1.9 or 0 VDC
(Initial voltage may vary due to the hall sensor position)
Test 2:
Hot Water Tap ON
Measure the DC voltage between Pin 1 (White)
and Pin 3 (Blue) on connector CN12
Expect 1.6 VDC
Hot water tap OFF
Measure the DC voltage between Pin 1 (White)
and Pin 3 (Blue) on connector CN12
Expect either 1.9 or 0 VDC
(Initial voltage may vary due to the hall sensor position)
Test 2:
Hot Water Tap ON
Measure the DC voltage between Pin 1 (White)
and Pin 3 (Blue) on connector CN12
Expect 1.6 VDC
Isolate as per TOPs P4
and refit as necessary