Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to DC Volts 
Turn Hot Water Tap On
Gain access to PCB (use Insulation Mat as required)
Pull connector X7 back slightly to expose soldered points on PCB as shown
Pull connector X7 back slightly to expose soldered points on PCB as shown
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure the voltage between pin 7 (pink) at X7 on the PCB to a suitable earth point.
Voltage should be approximately 2.5V DC.
Voltage should be approximately 2.5V DC.
Isolate as per TOPs P4
and refit as necessary