R380L(W)
8 – 3
[5] E: 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.
[6] F: 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 maybe due to over heating produced by improper
setting of the cooking time or failure of the control panel.
CARRY OUT 4R
CHECKS.
[7] G: 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.
[8] H: 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 fuseF10A.
CARRY OUT 4R
CHECKS.
CAUTION: ONLY REPLACE FUSE F10A WITH THE CORRECT VALUE REPLACEMENT.
[9] I: NOISE FILTER TEST
CARRY OUT 3D CHECKS.
Disconnect the leads from the terminals of the noise filter. Using an ohmmeter, check
between the terminals as described in the following table.
If incorrect readings are obtained, replace the noise filter unit.
CARRY OUT 4R
CHECKS.
Table: Terminal Connection of Switch
Plunger Operation Common terminal to Normally open terminal Common terminal to Normally close terminal
Released Open circuit Short circuit
Depressed Short circuit Open circuit.
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°C Closed circuit
Table: Resistance of Motor
Motors
Fan motor Turntable motor
RMOTEA405WRZZ RMOTEA390WRE0 RMOTDA253WRZZ RMOTDA265WRZZ RMOTDA173WRE0
Resistance Approximately 388Ω Approximately 252Ω Approximately 14.5kΩ Approximately 14.7kΩ Approximately 12.2kΩ
MEASURING POINT INDICATION OF OHMMETER
Between N and L Open circuit
Between terminal N and WHITE Short circuit
Between terminal L and RED Short circuit
RED
WHT
FUSE
F10A
N
L
LINE CROSS CAPACITOR
0.068μ/AC250V
NOISE SUPPRESSION COIL
LINE BYPASS CAPACITOR
0.0022μ/AC250V
LINE BYPASS CAPACITOR
0.0022μ/AC250V
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