8 – 2
CAUTION: 1 C CORRESPONDS TO 120 WATTS. REPEAT MEASUREMENT IF THE POWER IS INSUFFICIENT.
[2] B: SWITCH TEST
CARRY OUT 3D CHECKS.
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in the following table.
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
[3] C: TEMPERATURE FUSE TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the temperature fuse. Then using an ohmmeter, make a continuity test across the two terminals as
described in the below.
If incorrect readings are obtained, replace the temperature fuse.
An open circuit temperature fuse (OVEN) indicates that the foods in the oven may catch fire, this may be due to over heating produced by improper
setting of the cooking time or failure of the control panel.
CARRY OUT 4R CHECKS.
[4] D: MOTOR WINDING TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the motor. Using an ohmmeter, check the resistance between the two terminals as described in the table below.
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
[5] E: FUSE F10A
CARRY OUT 3D CHECKS.
1. If the fuse F10A is blown, there could be shorts or ground in electrical parts or wire harness.Check them and replace the defective parts or repair
the wire harness.
2. If the fuse F10A is blown when the door is opened, check the 1st. latch switch, 2nd. interlock relay and monitor switch.
If the fuse F10A is blown by incorrect door switching replace the defective switch(s) and the fuse F10A.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE FUSE F10A WITH THE CORRECT VALUE REPLACEMENT.
Table: Terminal Connection of Switch
Plunger Operation COM to NO
COM to NC
COM; Common terminal
Released
Open circuit
Short circuit
NO; Normally open terminal
Depressed
Short circuit
Open circuit
NC; Normally close terminal
Table: Temperature Fuse Test
Parts Name
Temperature of “ON” condition
(closed circuit).
Temperature of “OFF” condition
(open circuit).
Indication of ohmmeter (When room
temperature is approx. 20 C.)
Temperature fuse 150 C
This is not resetable type.
Above 150
ti
u
c
ri
c
d
e
s
o
l
C
C
Table: Resistance of Motor
Motors
r
o
t
o
m
e
l
b
a
t
n
r
u
T
r
o
t
o
m
n
a
F
RMOTEA450WRZZ
RMOTEA475WRZZ
RMOTDA253WRZZ
RMOTDA289WRZZ
RMOTDA302WRE0
Resistance
Approximately 384
Approximately 333
Approximately 14.5k
Approximately 13.5k
Approximately 14.7k
1000g
1000g
1000g
T1 C
T2 C
Heat up for 38 sec.
R-350Y(S)
