Diagnostics; Built-In Error Codes; F2 Open Probe; F3 Controller Malfunction - Viking VGSO166 Service Manual

Diagnostics

Built-In Error Codes

The thermostat timer digital display is designed
to alert you if there is an error or problem in the
control. If one of the following codes occurs,
perform the following to determine the proper
repair:
F1 – Shorted probe
1. With Volt-Ohm meter set for resistance,
remove the wires from Thermostat Timer
terminals AT5 and AT6 and measure the
resistance across them.
2. If zero or infinite resistance, replace the RTD.
3. If resistance is in range per RTD chart on
page 20, check each wire to ground.
4. If resistance is present, the RTD is grounded
and the physical wires will need to be checked
for a grounded connection.
F2 – Open Probe
1. Replace RTD
F3 – Controller Malfunction
1. With Volt-Ohm meter set for resistance,
remove the wires from thermostat timer
terminals AT5 and AT6 and measure the
resistance across them.
2. If resistance is in range per RTD chart on
page 20, verify output at thermostat timer.
3. With unit set for bake or broil, 120 VAC should
be present from AT4 to ground.
4. If no voltage is present, replace thermostat
timer.
5. If voltage is present, verify wiring between
thermostat timer and selector (BA and BR).
6. With unit set for convection, 120 VAC should
be present from AT3 to ground.
7. If no voltage is present, replace thermostat
timer.
8. If voltage is present, verify wiring between
thermostat timer and selector (CV).
© 2009 Viking Preferred Service
®
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