TROUBLESHOOTING AND REPAIR INSTRUCTIONS FOR L&L KILNS
troubleshoot-general.pdf
REV: 4/15/2017
Page 5
2017
L&L Kiln Mfg, Inc. 505 Sharptown Rd, Swedesboro NJ 08085 856.294.0077 F:856.294.0070 [email protected] hotkilns.com
fuse holder. If power is not there then go further back on
the line and measure the voltage. Keep going until you find
voltage, then look for the problem between that point with
the voltage and the last point checked that had no voltage.
Control Board
1) If the transformer is OK and you know you have voltage
going to the control board but the control still shows no
display then the control board needs to be replaced.
DynaTrol:
hotkilns.com/dynatrol-control-board
Genesis:
hotkilns.com/genesis-control-board
One-Touch for School-Master kilns:
hotkilns.com/one-
touch-control-board-cone-6
One-Touch for Doll, Liberty-Belle and Fuego kilns:
hotkilns.
com/one-touch-control-board-cone-10
See this for how to replace:
hotkilns.com/replace-dynatrol
Internal Wiring
1) Unplug kiln or turn off at circuit breaker or fused
disconnect and open up panel. CHECK VOLTAGE TO BE
SURE. Make sure that all the wires inside the control panel
are connected. See photograph on page 2 or page 3 and
also the Wiring Diagram. Specifically look at the wires that
go from the power connection block to the on/off switch,
then to the control fuse and then to the control transformer.
Short Circuits
Do all the following with the kiln unplugged.
1) Check for short circuits. Look for any signs of burnt wires.
This might indicate a short circuit. A way this might happen,
as an example, is that frayed wires at the end of a wire
connector might touch each other.
2) Check for worn wires that may have shorted against the
case. Examine wire insulation. If the wire insulation has
become frayed the wires could short to the metal casing
which is electrically grounded.
3) Look for dirt. Some dirt (such as carbon compounds) are
electrically conductive. This is generally not the case with
ceramic materials but some can be. Vacuum out if you see
dirt.
NOTE: Usually a short circuit will trip either the circuit
breaker for the kiln or the fuses in the fused disconnect
switch, if you have one. You will then not see any display
on the DynaTrol. Turn your circuit breaker on and off, and
check fuses on the fused disconnect and control fuse.
CAUTION: These tests should only be done by an
experienced person familiar with electricity and its dangers.
Checking output of the Control Transformer (DANGER-
live test).
EASY-FIRE DISPLAY READS FAIL
Usually
FAIL
will be seen flashing along with a
tC1
,
tC2
or
tC3
indicating which thermocouple circuit has
failed.
Typically this will just mean that your thermocouple(s) need
replacing. Overtime the thermocouple tip will corrode and
cause a circuit to
FAIL
. We recommend replacing all
thermocouples simultaneously rather than as they fail.
See this to replace thermocouple:
hotkilns.com/change-
thermocouple
1) Unplug the kiln. Open the Control Panel. Remove
the offending thermocouples connection wires from the
Thermocouple Terminal Strip and bind the red and yellow
wires together with electrical tape. Close up the panel and
plug in the kiln. The control should read room temperature
for that thermocouple (approximately 90 Deg F because of
the thermocouple offsets).
2) If it does read room temperature then the thermocouple
is probably bad and needs to be replaced. If the control
does not read room temperature then there is either a bad
thermocouple wire in the Control Thermocouple Harness or
the control is bad.
3) Redo the test by putting a small jumper like a paperclip
across the thermocouple terminals directly on the DynaTrol
board. If the control now will read room temperature then
you have a bad thermocouple wire. If it does not read room
temperature then the control is definitely bad and needs to
be replaced. See this:
hotkilns.com/replace-dynatrol
