Problem: FAIL Message
Probable Causes:
■
Defective Thermocouple
■
Disconnected Thermocouple Lead Wires
■
Defective Board
■
Electrical Noise
UNPLUGkiln.Removethe4screwsholdingthecontroller
board faceplate to the switch box. Lift faceplate out of box.
Lookatthebackoftheboard.Youshouldseeayellowwireand
aredwire connected to connectors 10 and 11 (backof board).
(Seediagram,page22.)Ifoneofthesewiresisdisconnectedor
loose,reconnectortighten.(Graspconnectorblocktoprevent
block from twisting.) The controller should work now. If the
wireswereattachedsecurelytotheirconnectors,performthis
test:
1 Remove thermocouple
wires from connections
10 & 11.
2 Cut apaperclip inhalf. In
-
serta U-shapedpaperclip
piecebetweenconnectors
10 & 11. Tighten screws.
3 Place the faceplate back
into the switchbox with a
couple of screws.
4 Plug in the kiln orturn on
the breaker. If the board
reads room temperature,
replace the thermocou-
ple.Ifitreads FaIL ,replacetheboard.Thethermo-
coupleandthermocoupleleadwiresaresoldasasin-
gle unit. Therefore, damaged thermocouple lead
wirescallforreplacementofthethermocoupleitself.
Ifyou stillgeta FaIL message afterreplacingthe thermo
-
couple,watchforanerratictemperaturedisplay.Theproblem
may be due to electrical noise. See “Erratic Temperature
Readings,” page 20.
Problem: Err 0 Message
Probable Causes:
■
Electrical Spike or surge
■
Arcing on Relay
Electricalspikesornoisecancausetheprocessortojumpa
stepor malfunction.When Err 0 appears,unplug thekilnor
furnacefor10seconds.Thiswillresetthesystem.Thedisplay
should go backto ErrP . Check yourprogram tomake sureit
wasn’t corrupted. Thenfire yourkiln again. If Err0 persists,
have the controller serviced or replaced.
Problem: Err 1 Message
Probable Causes:
■
Temperature Rise Slower Than 12° Per Hour
■
Electrical Noise from Relays
■
Worn Thermocouple
Err1 appears when temperature rise is slower than 12°F/
12°CperhourinCone-Fireand Ramp-Hold.(In Ramp-Hold,
the temperaturemust alsobe belowthe localset point,which
isthetemperaturetheboardistryingtoreachtomaintaincor
-
rect rate. Ramp-Hold can be programmed for a rate slower
than 12º per hour without setting off the Err1 message.)
When Err1 appears, the heating elements will shut off.
Akilnthatfiresthisslowlymayneednewelements,voltage
maybelow,oryoumaybetryingtofirehotterthanthekilnwas
designedfor. Ifit happensin thesummer duringhot weather,
it is likely due to low voltage during peak electrical demand.
Did the firings gradually take longer? Did Err1 appear
only near the end of the firing? If yes to both questions, you
probably have worn elements.
If Err1 appearedwellbelow thetarget temperature,such
as1000°Fforan1800°Ffiring, youprobably havea burnedout
element or relay. See page 16, “Controller Display Lights Up
Normally, Some or All Heating Elements Do Not Fire” and
“Element Glow Test,” page 15.
Electrical noise from a chattering or buzzing relay can
cause an Err1 message.So cana worn thermocouple.Grasp
the thermocouple, which protrudes into the firing chamber.
Gentlymovethethermocouplebackandforth.Ifthetempera-
ture reading jumps, replace the thermocouple.
After Err1 appears,press 1.Thedisplaywill showthelast
temperaturethekilnreachedandthehoursfiredbeforeitshut
off. Then it will go back to IdLE .
Problem: Err 2 Message
Probable Causes:
■
Stuck Relay
■
Defective Controller
Err2 appears whenthe temperature risesover 50°above a
Hold temperature. It must remain over 50° for 18 seconds. It
appears only during a Hold segment.
Err2 is caused by a stuck relay or defective controller. If
the elements remainon after Err2 appears, check the relays
as shown on page 17. If the relays are okay and the elements
turn on whenyou reconnect the controllerwires tothe relays,
replace the controller.
Problem: Err 3 Message
Probable Causes:
■
Opening the Door
■
Burned-Out Element
■
Defective Relay
Err3 appears when the temperature falls more than 50°
belowtheHoldtemperatureduringaHoldsegment.See“Ele
-
ment Glow Test,” page 15, or test the relays and elements as
shown on page 17.
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