Viking VGDO271, Сервисный журнал, Страница: 16 / 52

T EST PROCEDURES
To avoid the risk of electrical shock, personal injury or death, disconnect power
before servicing, unless testing requires it.
Auto Latch Motor
Do not
remove latch motor or switches from latch
assembly. If latch motor or switches have failed,
replace latch assembly.
1. Disconnect power.
2. Slide oven out from wall cutout approximately 6
inches to gain access to control panel screws.
3. Remove screws securing control panel to unit, and
pull control panel out of unit to gain access to latch
assembly.
4. Disconnect lead wires from latch motor.
5. Connect jumper cord leads to latch motor.
6. Connect jumper cord to 120 AC power source.
7. Replace if latch motor fails to operate.
8. Reverse procedure to reconnect.
Auto Latch Switches
Unlock and lock door latch switches cannot be
replaced.
Replace latch as an assembly.
1. Perform steps 1 through 3, from “Auto Latch
Motor”.
2. Disconnect lead wires from door latch switch
(unlock)
3. Set ohmmeter to the R X 1 scale.
4. Attach meter leads to door latch switch (unlock).
5. Depress actuator arm. The meter should read
continuity.
6. Reverse procedure to reconnect.
7. Use same procedure to test door latch switch (lock).
If upper latch fails in the closed position.
1. Shut off electricity at the fuse box or circuit breaker.
2. Remove control panel to gain access to latch
assembly.
3. Force door latch rod past “fishhook” detent.
4. Replace latch assembly.
Oven Temperature Sensor
Detail testing can be accomplished as follows.
Oven temperature sensor is mounted in the oven cavity
and electrically connected to the ERC.
Following is approximate resistance.
75
°
F--1082 ohms
350
°
F--1656 ohms
550
°
F--2056 ohms
880
°
F--2686 ohms
Sensor resistance can be checked by removing the
sensor interconnect harness plug from the ERC and
inserting ohmmeter leads into the harness connector
plug. A resistance reading of approximately 1100 ohms
should be indicated at ambient room temperature, 75
°
F.
If a higher resistance is indicated, then remove sensor
from oven. Disconnect sensor from harness at plug and
recheck sensor resistance to assure that the problem is
in the sensor and not in the interconnect harness or due
to a bad connection.
NOTE: Sensor resistance will increase if held in your
hand.
1. Disconnect power to oven.
2. Disconnect sensor harness plug from ERC.
3. Connect meter leads into harness connector plug,
resistance should be approximately 1100 ohms at room
temperature 75
°
F.
•
If a higher resistance is indicated remove sensor
from oven. Disconnect sensor from harness at the
plug and recheck sensor resistance to assure the
problem is in the sensor and not in the
interconnecting harness or due to a bad
connection.
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