Selecting °F or °C Display
The controller can display temperature in either °F or °C. If your controller shows a small display dot in the lower right corner of the display, the temperature shown is °C. No dot means °F. To change temperature display:
UNPLUG kiln or disconnect power.
Remove the four screws that hold the controller to the front of the kiln. Carefully remove the controller from the kiln. Leave the wires attached to the con- troller.
Look at the back of the controller. You will find a set of connector pins near the bottom labeled “C/F.” When a jumper is placed on the C/F pins, the display reads °F. When the jumper is removed, display reads °C. Remove or insert the jumper as desired. (You can purchase the jumper from a computer supply store if necessary.)
Trouble Shooter
Problem: Controller display is blank. No heat in kiln.
■Is the kiln connected to the power?
■Has the circuit breaker tripped or fuse blown?
■Is power reaching the wall receptacle?
Test with a voltmeter or a test light if you are not sure.
■Has the kiln switch box ½ amp fuse blown?
The kiln’s ½ amp fuse is located in the kiln switch box. Remove by pressing the fuse holder and turning
of the fuse. If the ohm- meter reads less than an ohm (digital meter) or reads 0 ohms (ana- log meter), the fuse is okay. If the reading is OPEN (digital meter) or infinity/no needle movement (analog me- ter), the fuse is bad.
Replacement fuse: AGC 1/2 A 250V AC
■Is the controller receiving power? Test the power IN- PUT connections on the back of the controller with a voltmeter.
Controller Power Input Test
Unplug the kiln. Remove the 4 screws holding the con- troller faceplate to the switch box. Lift faceplate out of box and let the board hang on the box with the back of the board facing you. Plug the kiln back in. Touch voltmeter probes
The C/F jumper terminal is on the back of the controller, circled above.
Install the controller being careful not to jar compo- nents on the back of the controller against the kiln case.
Touch the voltmeter probes to the white and orange wires to test voltage going to the controller. The voltmeter must be in AC mode.
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