Merrychef eikon e6 - Manual (Page 36)

E2 SERVICE MANUAL REV D 09/12
36
SW2 SW1
2
3
MAINS VOLTAGE COMPONENTS
Door Interlock Adjustment
Located on the door hinges are 3 safety interlock
microswitches, to prevent microwave emissions escaping
when the oven door is opened:
The Primary (SW3) breaks the electrical supply circuit to the
transformers.
The Secondary (SW2) breaks the microwave circuit if the
primary fails.
The Monitor switch (SW1) will short out the Microwave circuit
blowing the fuse if both Primary and Secondary interlocks fail.
IMPORTANT: In the event that the Monitor switch causes
the Microwave circuit fuse to blow, the Secondary (SW2)
and Monitor (SW1) microswitches must be replaced due
to exposure from high short-circuit currents.
The purpose of the following adjustment procedure is to set
the interlock to switch off the Microwave circuit when the door
is opened and for the Microwave circuit to operate when the
door is closed and the door seal expands.
Door Interlock Adjustment procedure:
9
Disconnect and isolate the oven from the electricity
supply.
9 Allow the oven to cool down.
9 Remove the oven casing.
9 Ensure that the High Voltage Capacitor is discharged
before commencing work.
1 Place a red 2mm spacer over each top corner of the
door seal and carefully close the door.
2 On the left side slightly loosen the pivot screw.
3 Then slightly loosen the adjusting screws and pivot the
microswitch backplate downwards until the microswitch
(SW3) just clicks and tighten all the screws.
4 Open door to replace the red 2mm spacers with green
4mm spacers and carefully close the door.
5 On the ride side, slightly loosen the pivot screw.
6 Then slightly loosen the adjusting screws and pivot
the microswitch backplate downwards until the
microswitch (SW2) just clicks and tighten all the
screws.
7 Ensure that all the screws are tightened.
8 Remove spacers, then open and close the oven door
5 – 10 times.
IMPORTANT: CHECK THE SWITCHES OPERATE IN
THE FOLLOWING SEQUENCE AS MICROSWITCH
SW3 MUST SWITCH THE LOAD CURRENT.
Opening the door:
• SW3 opens first
• SW2 opens second
• SW1 closes third
Closing the door:
• SW1 opens first
• SW2 closes second
• SW3 closes third
SW3
2
3
SW1
SW2
5 6
1
4
OVEN DOOR OPEN
OVEN DOOR CLOSED
SW2
SW3
SW1
SW3 SW2
L1
L1
N
SW1
N