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R-247(SL)
R-247(W)
R-247(W)
9
TEST PROCEDURES
PROCEDURE
LETTER
COMPONENT TEST
G. The resistance across all the terminals and the chassis must be infinite when the capacitor is
normal.
If incorrect reading are obtained, the high voltage capacitor must be replaced.
CARRY OUT 4R CHECKS.
E
SWITCH TEST
Isolate the switch to be tested and using an ohmmeter check between the terminals as described in
the following table.
the following table.
CARRY OUT 3D CHECKS.
Table: Terminal Connection of Switch
COM; Common terminal
Plunger Operation
COM to NO
COM to NC
NO;
Normally open terminal
Released
O.C.
S.C.
NC;
Normally close terminal
Depressed
S.C.
O.C.
S.C.; Short circuit
O.C.; Open circuit
O.C.; Open circuit
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
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.
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.
Table:
Temperature Fuse
Test
Temperature of "ON"
Temperature of "OFF"
Indication of ohmmeter (When room
Parts Name
condition (closed circuit).
condition (open circuit).
temperature is approx. 20˚C.)
Temperature fuse 120˚C
This is not resetable type.
Above 120˚C
Closed circuit
If incorrect readings are obtained, replace the temperature fuse.
An open circuit temperature fuse (OVEN) indicates that the food in the oven cavity may catch fire, this
may be due to overheating produced by improper setting of the cooking time or failure of the control
panel.
may be due to overheating produced by improper setting of the cooking time or failure of the control
panel.
CARRY OUT 4R CHECKS.
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.
terminals as described in the table below.
Table: Resistance of Motor
Motors
Resistance
Fan motor
Approximately 400 ohms
Turntable motor
Approximately 14.5 kohms
If incorrect readings are obtained, replace the motor.
CARRY OUT 4R CHECKS.
H
FUSE T6.3A
CARRY OUT 3D CHECKS.
If the fuse T6.3A is blown when the door is opened, check the 1st latch switch, 2nd. interlock relay
control switch, monitor switch and 2nd. interlock relay RY2.
control switch, monitor switch and 2nd. interlock relay RY2.
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