Problem: Kiln switch box ½ amp fuses keep blowing.
■What size fuse are you using? Correct fuse: AGC ½ A 250V AC
If the fuse is the correct size, perform the following test:
Kiln Switch Box ½ Amp Fuse Power Test
UNPLUG the kiln/disconnect the power. Remove the 4 screws holding the controller board faceplate to the switch box. Lift faceplateout of box and let the board hang on the outside of the box with the back of the board facing you. Disconnect both wire plugs from the back of the controller. Then plug the kiln back in. Apply power to kiln. If the ½ amp fuse blows, replace the transformer. (If the fuse does not blow, the problem is a board or relay. Go to step 2.)
Connect the INPUT plug (orange, blue, and white wires) to the board again. Leave off the OUTPUT wire plug (the one with the red and black wires). Program the controller to fire to 1000°F at FULL
rate in 
. If the fuse blows, replace or service the board. (If the fuse does not blow, the problem is caused by a short in the coil of a relay. Go to step 3.)
UNPLUG kiln/disconnect power. Reconnect the OUTPUT wire plug. Reinstall the board in the switch box. Replace the relay.
Index
Add Hold Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 bAdP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 calibrating the controller . . . . . . . . . . . . . . . . . . . . . . . . 12 casting temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 clicking sound . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6, 8, 14 cooling segment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 CPLt (complete) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Delay timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 display dot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3, 13 editing target temperature . . . . . . . . . . . . . . . . . . . . . . . . 9 element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 EtH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 FAIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 FE error messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figuring firing time of a segment . . . . . . . . . . . . . . . . . . . 5 FtL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13, 15 hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5, 6 HtdE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 lost wax burnout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PF 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PF 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PF 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 power failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4, 12 power surges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Program Review . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
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