TurboChef Encore Touch Rapid, Service Manual

Page: 59 / 116

35
OVE
n
S
ySTEMS
The door must completely snap shut on its own. If the
door sticks or force is needed to finish closing it, it is
out of adjustment.
WARNING: Perform a microwave leakage test
(page 36) after adjusting the oven door.
Interlock Switches
The primary, secondary, and monitor interlock
switches engage and disengage in sequence to ensure
a proper seal. When the door is opened, the switch
sequence is P, S, M. Subsequently, the sequence is M,
S, P when the door is closed.
Relay - K3 Monitor
The K3 relay is a 240 VAC, 24 VDC coil, 20 amp,
sealed dual-pole relay. It shorts L1 and L2, which
blows the F3 fuse if the monitor switch opens before
the primary or secondary switches while the microwave
system is energized.
NOTE: The oven control is designed to de-energize the
microwave circuit when any of the switches are open.
If the oven control de-energized the microwave circuit
before the mechanical failsafe is enacted, the F3 fuse will
not blow in the event of an F4 fault condition.
Adjusting the Primary, Secondary, and
Monitor Switches
WARNING: This procedure is performed while
the oven is hot. To avoid burns, be careful
when adjusting the switches.
Use the following procedure to adjust the primary,
secondary, and monitor switches. The secondary
switch is located on the left side hinge assembly and the
monitor switch is located on the right side hinge assem-
bly. The primary switch is located on the upper-left
corner of the oven and utilizes an actuator (attached to
the door) and toggle assembly (attached to the chassis)
to engage (Figure 27). For switch assembly details, see
page A-8.
1. Ensure the oven has been at operating temperature
for at least fifteen minutes.
2. If adjusting the primary switch, confirm the
primary switch’s latch toggle is in the correct
position (Figure 27).
a. Visually inspect the latch toggle position and
verify it is angled at no less than 85° and no more
than 90° in reference to the front flange (oven
face). See Figure 27.
b. If the toggle is less than 85° or greater than 90°,
correct the toggle’s position by installing a
spacer/shim (the more distance from the flange,
the less angle on the toggle):
- NGC-1169-1: Shim, 0.030” (0.762 mm)
- NGC-1169-2: Shim, 0.045” (1.143 mm)
c. Verify the position of the toggle by opening and
closing the oven door several times.
3. Adjust the switch(es):
a. Enter Test Mode (page 19).
b. Open the oven door and view the status
indicators at the bottom of the screen to
verify P, S, and M disengage in sequence.
c. Close the oven door and verify M, S, and P
engage in sequence.
d. If the switches do not engage or disengage in
sequence, close the door and adjust the
necessary switch(es) by loosening the two #4-40
screws and #8-32 screw until the proper
sequence is achieved.
NOTE: DO NOT allow the switch paddle to rest on
the body of the switch in the closed door position.
The final adjustment requires a minimum of a 0.030”
(0.762 mm) gap to avoid over-travel and bent/
damaged switches.
4. Open and close the door several times to verify
the switch gap.
5. Energize the microwave system and open the
oven door.
6. Verify the W indicator is backlit, meaning
the microwave system turns off when the door
is open.
7. Perform a microwave leakage test (page 36).
0.030” (0.762 mm) Gap
85°-90° Angle
figure 27: Switch Detail and Proper Alignment