Sentry Industries Sentry Xpress 4.0 - Manual (Page 12)

12 Single-Speed/Ramp-Hold
FE Error Messages
FE 1 Memory Read/Write Failure
FE 2 RAM Failure
FE 3 OEM Factory Data Corruption
FE 4 Thermocouple “Noise”
FE 5 Software Error
To return to from an FE code
Try pressing any key. If that doesn’t work, turn the power
off for 10 seconds. Call the factory if the error message re-
mains when you turn the power back on.
If you get an message, check the wire connections
going from the back of the controller to the thermocouple.
A loose connection can cause the message.
FtL / Fired Too Long
This message appears when both of the following condi-
tions are met:
■ The temperature rise or fall is less than 27°F / 15°C per
hour.
■ The firing is 2 hours longer than programmed.
Programming a cooling segment targettemperaturethat
is below or even close to room temperature can also trigger
the message.
See “Controller display turns on. No heat in kiln,” page
14.
HtdE / High Temperature
Deviation
Causes:
■ During a heating-up ramp or a hold, the temperature is
100°F / 56°C above the programmed temperature.
■ During a cooling-down segment, the temperature is
100°F / 56°C higher than the segment’s starting temper-
ature.
■ A fast rate caused the controller to overshoot the target
temperature.
Also, check for a stuck relay.
PF 1 / Power Failure
The power failed during a cooling segment, and the kiln
cooled past the target temperature while the power was off.
The kiln will not resume firing. To return to the dis-
play, press any key.
PF 2 / Power Failure
The power failed during firing and kiln temperature was
below 212°F / 100°C when the power came back on. The
kiln will not resume firing. To return to the display,
press any key.
PF 3 / Power Failure
The power failed during firing and temperaturedropped
more than 72°F / 40°C by the time the power came back on.
The kiln will not resume firing. To return to the dis-
play, press any key.
tC / Thermocouple Failure
The thermocouple failed during the display. See
the "paperclip" test under "FAIL," page 11.
tCL / Thermocouple Lag
The heating rate is slower than 9°F / 5°C per hour and the
controller temperature is more than 100°F / 56°C away
from the actual kiln temperature. To return to the
display, press any key. Causes:
■ On kilns that use a portable controller, the thermocou-
ple has fallen out of the firing chamber.
■ A bare spot on the thermocouple lead wires has touched
a grounded object inside the kiln switch box causing the
thermocouple to short out.
Check for worn or burned out elements, defective relays,
low voltage and defective thermocouple.
tCr / Thermocouple Reversed
Thermocouple lead wires are reversed. Check that the
thermocouple lead wires are connected to the correct ter-
minals. See your kiln’s wiring diagram.
Thermocouple
Offset
You can adjust the controller to fire up to 20°F / 11°C
hotter or cooler than the zero factory setting.
From , press the key. After rate,
temperature, hold, etc., will appear.
With shown in the display, press the
key.
will appear. Press the arrow keys to change
the controller temperature.
Press the key to return to the display.
To fire the controller, press . will ap-
pear. Or to return to , press two more
times.