Operator`s manual

14
TROUBLESHOOTING THE VULCAN "3-" CONTROL
PROBLEM
Dead, Not Operating
No Power / Display
Not Heating
During Program
Operation
Door Too Loose or
Tight
Heating Too Slow
Program Turns Off
Too Early
Fan Does Not Operate
CHECK LIST / CAUSES
- Check power receptacle or outlet for power
- Check line or power cord connections
- Turn on green power switch
Does the green power switch light when the Start key is pressed?
No: - Is door completely closed? Door switch may be interrupting power.
Yes: - Check the fuses on the controller PCB
- Check heating element plates for continuity
- The amount of force or drag on the door movement can be changed by adjusting the
hex screws located on the upper rear corners of the furnace cabinet. Turning the
screw clockwise adds drag and requires more force
- Rate programmed wrong. 1.5°/minute rather than 15.0°/minute
- Large loads will slow down response time and increase the time to temperature by 2
to 5 times
- Programming a Rate to zero will terminate the remainder of the program
- End of program option has been changed from 1 or 2 to option 3 which turns off the
furnace at the end of the program [End].
- Operates only in a start cycle
- Setting of 0 means no fan active