© 2010 Viking Preferred Service
47
Service Diagnostics and Procedures
Control Board Diagnosis
RTD Sensor
Locate the P15 connector on control board. The
P15 connector will have a Molex plug containing a
gray and violet wire. The gray and violet wires go to
the oven sensor.
With the Molex plug removed, use an Ohm meter
to measure resistance between the gray and violet
wires in the Molex connector. At room temperature
the reading should be approximately 1050 – 1100
Ω
.
If no or infinite resistance is read, verify sensor wiring
is connected completely through circuit. If wiring is
OK, replace the sensor.
RTD Characteristics
RTD (Resistance Temperature Detector)
Temperature (˚F)
Resistance (Approximate)
50
1038
75
1090
100
1143
200
1350
300
1553
350
1654
400
1754
450
1852
500
1950
550
2047
600
2153
650
2238
700
2332
750
2425
800
2318
850
2609
900
2700
Note:
Door switch must be depressed in order for
the Convection Fan and all convection cycles, Auto
Roast and Dehydrate heating elements to operate
when the door is opened.
IRIS Spark Module Test
(Surface Burner Igniter will not spark)
To check the spark module perform the following:
1.
Check for any debris/build up around the
igniter and operate the burner again.
2.
Disconnect power and remove the landing
ledge
(see procedure for control panel
disassembly).
3.
Disconnect the wire harness from the suspect
spark module.
4.
Reconnect power and test for 120 VAC from
black to white.
5. If no power is present, check wiring. If power is
present, disconnect power and reconnect wire
harness.
6. Disconnect black wire from the spark module
and check for 0
Ω
between the black wire and
the tip of spark electrode.
8. If infinite resistance is found, remove the
burner base and unplug the electrode. Check
the electrode terminal to tip. If infinite ohms,
replace the burner base assembly.
9.
Test the wire between the module and ignitor.
Replace if defective. Replace electrode and
replace wire.
10. If 120 volts are present at the module and the
ignition system tests good, replace the spark
module.
P-15
P-15
