R-20A1(S)VN
8 – 3
If incorrect readings are obtained, make the necessary switch adjustment or replace the switch.
CARRY OUT 4R CHECKS.
[6] Procedure 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.
g produced by
improper setting of the cooking time or failure of the control panel.
CARRY OUT 4R CHECKS.
[7] Procedure 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] Procedure H: FUSE T6.3A
CARRY OUT 3D CHECKS.
If the fuse T6.3A is blown when the door is opened, check the monitored latch switch, relay (RY1), timer switch and monitor switch.
If the fuse T6.3A is blown by incorrect door switching replace the defective switch(es) and the fuse T6.3A.
If the fuse T6.3A is blown, there is a shorts or grounds in electrical parts or wire harness. Check them and replace the defective parts or repair the
wire harness.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE FUSE T6.3A WITH THE CORRECT VALUE REPLACEMENT.
[9] Procedure I: HIGH VOLTAGE FUSE TEST
CARRY OUT 3D CHECKS.
Check them and replace the defective parts and the high voltage fuse.
CARRY OUT 4R CHECKS.
CAUTION: ONLY REPLACE HIGH VOLTAGE FUSE WITH THE CORRECT VALUE REPLACEMENT.
[10] Procedure J: TIMER MOTOR TEST
CARRY OUT 3D CHECKS before any of the following timer tests.
1. TIMER SWITCH- CONTACTS
Disconnect the leads from terminals described at fo llowing table. Connect an ohmmeter across terminals
described at following table.
Advance the timer and check that a short circuit reading is obtained on the meter.
Turn the timer back to the zero (0) position and check that an open circuit reading is obtained on the meter. If these readings
are not obtained then
replace the timer.
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
t
i
u
c
r
i
c
d
e
s
o
l
C
C
Table: Resistance of Motor
Motors
Resistance
Fan motor
Approximately 250
Turntable motor
Approximately 14.7 k
Disconnecting and checking terminals
1 and 2
M
4
2
3
1
