Service manual

Page 13 400 Series Ovens 32Z3769 Issue 1
Procedure for Door Interlock and test:
The three interlock Microswitches are located
on the LHS of the oven.
Release the 2 screws retaining each
microswitch assembly just enough to allow
the assembly to move.
The purpose of this procedure is to set the interlock so that when the
door is opened more than 3mm the Oven microwave circuit is switched
OFF.
The door closed position [Microwave circuit ON] is actually set with a
1mm opening to allow for heat expansion when the oven is operating at
full temperature.
WARNING
Before adjusting the microswitch assemblies ensure that the oven has been
isolated from the electrical supply and discharge the HT Capacitors.
Please note the terminals on the microswitches remain live when the oven is
switched off, so complete isolation is essential.
1
To set Microswitches SW1 & SW2 and SW3 to OPEN [OFF] at a
door opening with a 3mm gap:
Slide forward Microswitch assembly to set SW2 to just click CLOSED
and then allow the assembly to move slightly approx. 0.05– 0.10 Inch
(1-2mm) to just allow the switch to return to the OPEN position and
tighten both screws.
Repeat for SW3 rotating clockwise to CLOSED until it just opens then
anti-clockwise slightly to the OPEN position and tighten screws.
Position the door open with a 3mm gap:
Place the two 3mm Spacers over the door seal at the top of the
door on each side at the corner and carefully close the door
ensuring the spacer is on the door seal.
2
3mm Spacers
Door
Seal
Door
Five Microswitches:
SW1, SW2 & SW3 door
interlock Microswitches are
located on the LHS of the
oven.
SW4 & SW5 are located on
the RHS of oven behind the
control panel.
SW4 switches off the
convection fan
SW5 sends a ‘door open‘
signal to the Control Board
SW3
SW1 & SW2
Tools Required: Door Spacer Kit P10H0129, Multimeter