Programming instructions

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Controller Power Input Test Result: less than 20 volts

Did you recently replace the transformer? It may be the

wrong voltage. The voltage is below 20, which is not enough

power for the controller. To find out the cause of low volt

age, continue below:

Controller Input Test #2

The back of the board is

still facing you and the kiln

is plugged in. Remove the

INPUT plug, which is the

white, orange, and blue

wires, from the back of the

controller. Touch a volt

meter probe to the white

wire and the other probe to the orange wire.

Input Test #2 Result: Less than 20 Volts AC

There are two possible reasons: 1) Low voltage at the

wall receptacle; 2) defective transformer. If wall receptacle

voltage is correct, replace the transformer.

Input Test #2 Result: 20 - 24 Volts AC

The transformer is sending correct voltage to the con

troller. Yet when the INPUT plug was connected to the

controller, voltage was less than 20. This means the control

ler is draining the voltage and is defective. Return the con-

troller for repair or replacement.

Problem: Controller display

turns on. No heat in kiln.

Is the relay making its normal clicking sound?

Yes, the relay is clicking.

Test the elements with an ohmmeter:

Element Resistance Test

UNPLUG kiln/disconnect the power. Open the

kiln’s switch box. Make sure the wires connecting

the relay to the elements are secure. If connections

are okay, continue to step 2:

Touch the ohmmeter leads to the two element con

nectors of each element. A no-needle-movement

reading on an analog meter, or OPEN on a digital

meter, indicates a broken element.

If the elements check out okay, replace the relay.

Note: To replace relay, see your kiln’s instruction and

service manual.

No, the relay is not clicking.

We know the controller is receiving voltage, because the

display is lit. But the voltage from the transformer may be

too low to power the relays. Perform the “Controller Power

Input Test,” page 10. If your controller passes the input test,

perform the “Controller Power Output Test”:

Controller Power Output Test

Is the controller sending voltage to the relay? Test OUT

PUT with a voltmeter:

UNPLUG the kiln/disconnect the power. Remove

the 4 screws holding the controller faceplate to the

switch box. Lift faceplate out of box and let the con

troller hang on the outside of the box with the back

of the board facing you. Then plug the kiln back in.

Program the controller to fire to 1000°F at FULL

rate in Ramp-Hold mode. Press .

Put the voltmeter in DC mode. (It must be in DC

mode when testing OUTPUT voltage.) Touch

probes to the red wire and black wire connections.

Measure voltage when the relay clicks on.

Output Test Result: No voltage at red and black wires

The controller is not sending power to the relay. Return

the controller for repair or replacement.

Output Test Result: 10 - 14 v. at red and black wires

The controller is sending correct power to the relay. Un

plug kiln/disconnect power. Remove the kiln switch box.

Look for disconnected wires between the controller, relay

and elements. Check the wiring diagram to be sure wires

are connected to the correct terminals. Be sure connections

are tight. If the wiring is okay, replace the relay.

Note: To replace relay, see your kiln’s instruction and

service manual.

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 thecorrectsize, performthe 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

tothe switch box. Lift faceplateoutof box and letthe

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 boardor relay. Goto 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, green and black

wires). Program the controller to fire to 1000°F at

FULL rate in Ramp-Hold mode. Press .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.