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)
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Test 1.
Measure for DC volts across pins 3 (pink lead) and
pin 2 (white lead) of connector CN203.
Expected voltage approximately 5 Vdc.
Test 2.
Turn hot water tap ON.
Measure for DC volts across the same test points as Test 1.
Voltage should have dropped to approximately 0 (zero) Vdc.
Measure for DC volts across pins 3 (pink lead) and
pin 2 (white lead) of connector CN203.
Expected voltage approximately 5 Vdc.
Test 2.
Turn hot water tap ON.
Measure for DC volts across the same test points as Test 1.
Voltage should have dropped to approximately 0 (zero) Vdc.
