– 45 –
4. Check continuity of the switch with door open
and door closed. Normal readings are as follows:
• Door Closed: In
fi
nity
• Door Open: 0
Ω
How to Test Interlock System:
1. Disconnect power, remove the outer cover (See
Oven Removal / Partial Removal
) and discharge
capacitor.
2. Check 20 amp fuse for continuity and proper
size. Do not use any other fuse or size except 20
amp.
3. Remove monitor switch leads to isolate switch.
Check continuity of switch with door open and
door closed.
• Door Closed: In
fi
nity
Ω
• Door Open: 0
Ω
4. Reconnect switch wiring.
5. Test Circuit Operation.
a. Connect temporary jumper leads across
RY14 relay contacts, primary interlock
and door sensing switches to simulate
shorted switch contacts. Locate convenient
connections in circuit to be certain COM and
NO terminals are used.
b. Connect ohmmeter (Rx1) across the L1
(red wire) and Neutral at the power inlet
wire harnesses. Continuity must show the
following:
• Door Closed : Some
Ω
• Door Open : .3
Ω
c. Remove 20 amp fuse. Circuit must open
(in
fi
nity
Ω
). If not, check wiring of monitor
and interlock circuits.
WARNING:
After test, remove temporary jumper
leads from primary interlock and door sensing
switches and RY14 relay.
WARNING:
Primary interlock, door sensing switch,
monitor switch, and relay board must be replaced
when the 20 amp fuse is blown due to operation of
monitor switch.
Note:
Perform microwave leakage test when
replacing or adjusting interlock switches or latch
board.
How to Adjust the Interlocks:
The latch board is adjustable for proper door closure
and switch operation.
Disconnect power and partially remove the
1.
oven from it’s installation. (See
Oven Removal /
Partial Removal
.
)
Note:
Each latch board is held in place and adjusted
with 2 Phillips-head screws. The screws are recessed
from the top of the outer cover. Access holes are
provided.
2. Loosen the 2 Phillips-head screws that attach
the latch board to the oven chassis.
3. Adjust each latch-board for proper door closure
and switch operation, retighten screws.
(
Continued Next Page
)
Note:
Perform microwave leakage test when
replacing or adjusting interlock switches or latch
boards.
To remove the door switches:
Place the oven in a partially removed position.
1.
(See
Oven Removal / Partial Removal
.)
Open the oven door.
2.
Remove the single Phillips-head screw that
3.
holds the door switch access cover to the outer
cover.
Disconnect the switch wiring.
4.
Содержание 240
Страница 52: ... 52 https appliancetechmanuals com ...
