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When troubleshooting the microwave oven, it is helpful to follow the Sequence of Operation in performing the checks.
Many of the possible causes of trouble will require that a specific test be performed. These tests are given a procedure
letter which will be found in the "Test Procedure" section.
IMPORTANT: If the oven becomes inoperative because of a blown fuse F1 (F10A) in the 1st. interlock switch SW1 -
monitor switch SW3 - relay RY-2 circuit, check the 1st. interlock switch SW1, monitor switch SW3 and
relay RY-2 before replacing the fuse F1 (F10A).
TEST PROCEDURE
POSSIBLE CASE
AND
DEFECTIVE PARTS
PROBLEM
CONDITION
Home
fuse
breaker blows when power
cord is plugged into wall
outlet.
OFF
Fuse F1 F10A blows when
CONDITION
power cord is plugged into
wall receptacle.
88:88 does not appear
in display when power
cord is first plugged into
wall outlet.
Oven lamp does not light
when door is opened.
Oven lamp lights but fan
motor and antenna motor
do not operate.
Oven does not go into
COOKING
CONDITION
cook cycle when START
button is touched.
Oven
seems
operating but little or no
heat is produced in oven
load. (Food incompletely
cooked or not cooked at
all at end of cook cycle.)
Oven goes into a cook
cycle but extremely uneven
heating is produced in oven
load (food).
Oven
does
properly when programmed
for Cooking 50% power
mode. (Operates properly
on Cooking 100% power
mode.)
"EE9" Maximum time is
ERROR MODE
exceeded.
TROUBLESHOOTING GUIDE
A B C D E E
or
circuit
to
be
not
cook
E F
G H
I
I
J K L
9
M M M N CK RE RE RE CK CK CK CK
R-15AM
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