RE220002 Rev. 6
14
Test Procedures
High voltages are present during the cook cycle.
Extreme caution should be observed at all times.
Before touching any oven components or wiring,
always unplug the oven from its power source and discharge the
capacitor by shorting across the capacitor terminals with an insulated handle screwdriver.
DANGER
!
First Isolation Test (FS14, FS16)
Power output of approximately 700 watts indicates one
high voltage section is functioning normally and one
high voltage section is defective. The following
procedures will isolate the defective high voltage
section.
1. Disconnect and isolate the common wire from the
primary of the left power transformer,
2. Perform power output check.
A. If the output power is normal (550 - 750 watts),
go on to step 3.
B. If low or no power is indicated, the problem is in
the right high voltage section. Perform high
voltage component tests on components of right
high voltage section.
3. Reconnect wire to left transformer.
4. Disconnect and isolate the common wire from the
primary of the right power transformer.
5. Perform power output check.
If low or no power is indicated, the problem is in the
left high voltage section. Perform high voltage
component tests on components of left high voltage
section.
Second Isolation Test
Perform the isolation test when little or no heat is
produced by the oven, but all other operations appear
normal. This test isolates the problem to either the high
voltage section or the line voltage section of the oven.
1. Connect a meter capable of measuring 250volts AC
across the primary of one power transformer.
2. Put the oven into a cook cycle and observe the
voltage reading. Measure the voltage across the
primary of the second power transformer.
Procedure A: If the primary voltages are normal,
(1line voltage AC) proceed to the high voltage tests in
this section.
Procedure B: If low or no voltage is indicated, the
problem is in the line voltage portion of the oven.
Interlock switch module tests
The interlock switch module is activated by the door and
door latch assembly. All interlock, monitor and door
sensing functions are performed by this module.
1. Unplug the oven power cord, remove the control panel
assembly, and remove the interlock switch module.
2. Disconnect wire leads from the terminals to be tested
and reinstall the interlock switch module.
3. With an ohmmeter, check continuity between terminals
using the test chart below.
4. If improper indications are given, check the door and
latch for proper activation of switches. If door
activation checks OK, replace Interlock Switch
Module.
X Indicates
Contacts
Cl
d
Primary
Interlock
Secondary
Interlock
Interlock
Monitor
Door Logic
(Sense)
Terminals
8 - 3
6 - 7
1 - 6
4 - 5
Function
Door Open
X
Door Closed
X
X
X
WARNING
!
For continued protection against radiation hazard,
replace only with manufactures parts catalog numbered
switch.
Interlock Switch Module