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Problem Probable Causes Corrective Action
Controller displays
CLOSE DRAIN
VALVE.
Drain valve is open or switch is out of
adjustment or failed.
Ensure all drain valves are completely
closed and that microswitches are
adjusted and working.
Controller displays
ERROR RM SDCRD
Defective SD Card Replace card with another card.
Controller
displays
TEMP
PROBE FAILURE.
Problem with the temperature measuring
circuitry including the probe.
This indicates a problem within the
temperature probe circuitry. Check
resistance of probe. If faulty, replace
probe.
Controller displays
PROBE FAILURE
with alarm sounding.
Damaged controller wiring harness or
connector.
Swap the controller wiring harness
with one known to be good. If
problem is corrected replace the
harness.
Controller displays
HEATING
FAILURE.
Open drain valve, failed controller, failed
interface board, open high-limit
thermostat.
Is displayed if the fryer loses its ability
to heat oil. It is also displayed when
the oil temperature is above 450°F
(232°C) and the high-limit thermostat
has opened, halting the heating of the
oil.
Controller will not go
into program mode or
some buttons do not
actuate.
Failed controller. Replace controller
Controller displays
low temp,
heating
indicator cycles on and
off normally but fryer
does not heat.
A. Failed controller.
B. Damaged controller wiring harness.
A. Replace controller.
B. Replace controller wiring harness.
Controller displays
HEATING
FAILURE with alarm
sounding. Heating
indicator is on, but
fryer is not heating.
Drain valve not fully closed. Ensure all drains are fully closed.
Using the ON/OFF switch, turn the
controller OFF and then ON again.
Controller displays
HEATING
FAILURE and alarm
sounds, but fryer
operates normally
(false alarm).
Failed controller.
Replace controller.
Controller displays HI
2 BAD.
Controller in high-limit test mode.
This is displayed only during a test of
the high-limit circuit and indicates that
the high-limit has failed.
Controller displays
software for only 3000
or ATO board.
Loose or damaged harness
Check that all harnesses between 3000’s
and ATO are secure and no pins are
pushed out or broken.
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