Despatch RBC1-50 with Protocol Plus - Manual (Page 39)

35
Circuit Board Check
The circuit board mounted on the control panel has three status LED indicators to help
troubleshoot if the oven is not heating.
•
If LED 1 is not lit, check 2F and 3F (control fuses), or power switch.
•
If LED 1 and LED 3 are lit but not LED 2, check high limit (and optional door
switch, if installed).
If all three LEDs are lit, check 1F and 4F (heater relay fuses), SSR, heater, heater
fuses, and heater relay.