Sentry Industries Sentry Xpress 4.0 manual Index, Problem Kiln switch box ½ amp fuses keep blowing

Page 15

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 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.

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 Ramp-Hold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 repeating a firing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 scrolling numbers rapidly . . . . . . . . . . . . . . . . . . . . . . . . . 4 Single Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Skip Segment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 tC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 tCL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 tCOS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 tCr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 temperature display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 temperature over-shoot . . . . . . . . . . . . . . . . . . . . . . . . . . 6 temperature, °F and °C. . . . . . . . . . . . . . . . . . . . . . . . 3, 13 thermocouple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3, 11 thunder storms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 time display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

15

Image 15
Contents Sentry Xpress Introduction ContentsOperation Begins from the IdLE Display SafetyTime and Temperature Display General GuidelinesCanceling a New Program DelayPower Failures Thunder Storms Power SurgesTwo Firing Modes Single-Speed and Ramp-Hold Theory OperationRate HoldTemperature Over-Shoot Selecting a Firing ModeSingle-Speed Programming Instructions Parts of a Segment Ramp-Hold ModeProgramming a Cooling Segment Ramp-Hold Practice ProgramRamp-Hold Programming Instructions Advanced FeaturesSkip Segment Add Hold TimeOverview Editing the Target TemperatureAlarm Lost Wax BurnoutBurnout Instructions Display MessagesFail / Thermocouple Failure Error MessagesBAdP / Bad Programming EtH / Electronics Too HotPF 2 / Power Failure FE Error MessagesHtdE / High Temperature Deviation PF 1 / Power FailureTrouble Shooter Problem Controller display is blank. No heat in kilnController Power Input Test Selecting F or C DisplayProblem Controller display turns on. No heat in kiln Problem Kiln switch box ½ amp fuses keep blowing Kiln Switch Box ½ Amp Fuse Power TestIndex Single-Speed Shorthand Instructions