Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect connector X6 from the PCB
Measurement:
Note the operating pressure indicated on the pressure switch.
Connect the air pressure switch charge kit to
+ve connection on the air pressure switch,
disconnect the -ve connection.
Ensure the performance tester reads 0mb.
Increase the pressure via the syringe to that
indicated on the pressure switch. Continuity
should then be measured between the red (20)
and orange (22) wires at the disconnected plug.
Notes:
100Pa (Pascals) = 1millibar
If continuity is not measured it is permissible
to increase the pressure by up to 50%
Connect the air pressure switch charge kit to
+ve connection on the air pressure switch,
disconnect the -ve connection.
Ensure the performance tester reads 0mb.
Increase the pressure via the syringe to that
indicated on the pressure switch. Continuity
should then be measured between the red (20)
and orange (22) wires at the disconnected plug.
Notes:
100Pa (Pascals) = 1millibar
If continuity is not measured it is permissible
to increase the pressure by up to 50%
Isolate as per TOPs P4
and refit as necessary