© 2012 Viking Preferred Service
25
Service Diagnostics and Procedures
Relay board LED’s
D12 – K3 Relay (L1) D23 – Inner Bake
D13 – K4 Relay (Door Lock Motor) D24 – Outer Bake
D14 – K5 Relay (Oven Light) D25 – Inner Broil
D19 – K6 Relay (Convection Speed Lo) D26 – Convection
D20 – K8 Relay (Cooling Fan Power) D27 – Outer Broil
D21 – K7 Relay (Convection Speed Hi) D30 – Line Break
D22 – K9 Relay (Cooling Fan Speed)
Relay boards (cont.)
The tables show the operating characteristics of the selector and thermostat
positions. The selector and thermostat are potentiometers (variable resistors)
whose resistance varies per user selections. The selected resistance informs the
board of the user’s selections. All values are approximate.
Selector
Resistance checks are made on the selector wire harness with the selector
wire harness disconnected from the board at location P14 and thermostat
disconnected. The harness is connected to P14 for voltage checks.
Selector Position Resistance - Voltage
blue to yellow
Resistance - Voltage
blue to black
Resistance - Voltage
black to yellow
Off 10.0 kΩ 5 VDC ∞ 5 VDC ∞ 0
Bake 10.0 kΩ 5 VDC 374 Ω 0.24 VDC 9.48 kΩ 4.74 VDC
Convection Bake 10.0 kΩ 5 VDC 1.60 kΩ 0.86 VDC 8.42 kΩ 4.12 VDC
Tru Convection 10.0 kΩ 5 VDC 2.60 kΩ 1.47 VDC 7.28 kΩ 3.49 VDC
Convection Roast 10.0 kΩ 5 VDC 3.85 kΩ 2.08 VDC 6.01 kΩ 2.88 VDC
Convection Broil 10.0 kΩ 5 VDC 5.00 kΩ 2.64 VDC 4.81 kΩ 2.31 VDC
Hi Broil 10.0 kΩ 5 VDC 6.14 kΩ 3.21 VDC 3.78 kΩ 1.80 VDC
Med Broil 10.0 kΩ 5 VDC 7.20 kΩ 3.66 VDC 2.72 kΩ 1.26 VDC
Low Broil 10.0 kΩ 5 VDC 8.28 kΩ 4.21 VDC 1.58 kΩ 0.77 VDC
Self Clean 10.0 kΩ 5 VDC 9.41 kΩ 4.82 VDC 443 Ω 0.22 VDC
Thermostat
Resistance checks are made on the thermostat wire harness with the thermostat wire harness disconnected from
the board at location P14 and selector disconnected. The harness is connected to P14 for voltage checks.
Thermostat
Position
Resistance - Voltage
blue to yellow
Resistance - Voltage
blue to orange
Resistance - Voltage
orange to yellow
Off 10.0 kΩ 5 VDC ∞ 5 VDC ∞ 0
200°F 10.0 kΩ 5 VDC 8.75 kΩ 4.32 VDC 1.31 kΩ 0.64 VDC
300°F 10.0 kΩ 5 VDC 6.88 kΩ 3.37 VDC 3.23 kΩ 1.40 VDC
400°F 10.0 kΩ 5 VDC 4.75 kΩ 2.50 VDC 5.20 kΩ 2.46 VDC
500°F 10.0 kΩ 5 VDC 2.89 kΩ 1.56 VDC 7.10 kΩ 3.42 VDC
Broil 10.0 kΩ 5 VDC 2.19 kΩ 1.11 VDC 8.00 kΩ 3.88 VDC
Clean 10.0 kΩ 5 VDC 696 Ω 0.36 VDC 9.34 kΩ 4.63 VDC