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:
Reset the appliance if required.
(Press reset button once then release)
Measure the DC Voltages between pins 1 to 5 on connector CN4 on the PCB to a suitable earth point.
The voltages should conform approximately to the table below:
(Press reset button once then release)
Measure the DC Voltages between pins 1 to 5 on connector CN4 on the PCB to a suitable earth point.
The voltages should conform approximately to the table below:
| Connector CN4 | DC Volts | Pin 1 | 137 |
| Pin 2 | 131 |
| Pin 3 | 126 |
| Pin 4 | 137 |
| Pin 5 | 137 |
Isolate as per TOPs P4
and refit as necessary