Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to DC Volts Set meter to measure DC Volts
Gain access to PCB (use Insulation Mat as required)
NO demands
WARNING! Mains voltage is expected during test, follow TOPs P4 live testing procedure
Mains Power On

Measurement:

Measure the voltage between pin 1 (Black) and pin 2 (White) on connector CN10.
Voltage should conform approximately to the table below:
System pressureVoltage dc
0 bar0.3
1 bar 2.3
2 bar3.2
3 bar4.7

Note:
Pressure should be set at approximately 0.5 - 1.5 bar.