Error Messages; Ftc / Failed To Cool; Fth / Failed To Heat; Ltde / Low Temperature Deviation - Orton Sentry 2.0 Operating Instructions Manual

Chapter 7

Error Messages

Error messages are accompanied by an alarm.
Non-interrupting messages do not stop the firing. Ter-
minating error messages do.
FTH, FTC, HTdE and LTdE error messages are based
upon the setting in the Temperature Deviation (TEdE)
option (page 15).
Non-Interrupting
Error Messages
Press to silence the alarm. (Do not press
silence the alarm.) The error message will remain but the
kiln will ordinarily continue firing. Even though the follow-
ing error messages appear, the kiln will continue its normal
operation. The messages are only to alert you that the kiln
could not cool or heat as fast as you had programmed. But
they will not shut off the kiln or affect the firing.

FTC / Failed to Cool

During a cooling-down ramp, the programmed rate is
faster than the kiln can cool. The temperature is above
the deviation setting. (See Temperature Deviation,
page 15.) Program a slower cooling rate.

FTH / Failed to Heat

During a heating-up ramp, the programmed rate is
faster than the kiln can heat. The temperature is below
the deviation setting. (See Temperature Deviation,
page 15.)
Program a slower rate. Or check for worn or burned out
elements, defective relays, low voltage and defective ther-
mocouple.
LTdE / Low Temperature
Deviation
During a cooling-down ramp or a hold, the temperature
is below the deviation setting. (See Temperature Devia-
tion, page 15.)
Check for worn or burned out elements, defective relays,
low voltage and defective thermocouple.

PF / Power Failure

alternating with normal display means the power
failed during firing. After power was restored, the firing re-
sumed.
Terminating Error
Messages
the kiln and flash the following:
Total firing time in hours and minutes
The kiln shutoff temperature
The current kiln temperature

BAdP / Bad Programming

This message appears when a program has been entered
with 0 rate in the first segment.

ETH / Electronics Too Hot

to
The circuit board tem-
perature
153°F/85°C.
Open windows and use a
fan to circulate air in the
room before firing the kiln
or furnace. If you have more
than one kiln in the room,
place them farther apart.
Never allow the firing room
temperature to exceed
110°F/43°C. (Measure room
temperature three feet away
from the kiln.)

FAIL / Thermocouple Failure

Defective Thermocouple
Disconnected Thermocouple Lead Wires
Defective Board
Electrical Noise

FTL / Firing Too Long

The temperature change is less than 27°F/15°C per hour
and the firing time is four hours longer than the current
segment was programmed to fire. This message can ap-
pear during heating-up
or cooling-down seg-
ments.
appears because the
cooling segment was
slower than the kiln
could naturally cool
down.
Check f or worn or
burned out elements, defec-
tive relays, low voltage and
defective thermocouple.
and error messages turn off
is above
If the thermo-
couple burns out
during a firing,
the controller
will shut the kiln
off and display
FAIL.
The last program
sometimes
you fired remains
in active memory
until you select a
different
program.
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