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EH1721 SERIES ELECTRIC FRYERS
CHAPTER 5: OPERATOR TROUBLESHOOTING
5-4
5.2.2 Error Messages and Display Problems
Problem Probable Causes Corrective Action
Display is in wrong
temperature scale
(Fahrenheit or
Celsius).
Incorrect display option programmed.
Computers may be programmed to
display in either Fahrenheit or Celsius.
Refer to the computer manual that
shipped with the fryer for instructions
on changing the display.
CM III.5
or
Digital Controller
display shows HELP
.
CM4-S and KFC-1
display shows
OPEN DRAIN
Open drain valve or problem with
latching circuitry.
Verify that the drain valve is fully
closed. The fryer will not function if
the drain valve is not fully closed. If
the drain valve is fully closed, the
problem is within the latching
circuitry and is beyond the scope of
operator troubleshooting. Call FASC.
Display shows hi
.
Fryer is more than 21°F (12°C) above
setpoint.
This display is normal if the fryer
setpoint has been changed to a lower
temperature. The display should
revert to the normal four dashes when
the frypot temperature cools to the
setpoint. If the setpoint has not been
changed, this indicates a problem with
the temperature control circuitry.
Turn the fryer off and call FASC.
CM III.5
or
Digital Controller
display shows hot
.
CM4-S and KFC-1
display shows HI-
TEMP or HI-Temp
probe failure.
Frypot temperature is more than 410°F
(210°C) or, in CE countries, 395°F
(202°C).
This in an indication of a malfunction
in the temperature control circuitry,
including a failure of the high-limit
thermostat. Shut the fryer down
immediately and call FASC.
CM III.5
or
Digital Controller
display shows lo
.
Frypot temperature is more than 21°F
(12°C) below setpoint.
This display is normal when the fryer
is first turned on and may appear for a
short while if a large batch of frozen
product is added to the frypot. If the
display never goes out, the fryer is not
heating. Look for a decimal in the
LED display between digits 1 and 2.
If the decimal is present, the computer
is calling for heat and is functioning
properly. See Fryer Does Not Heat in
Control and Heating Problems
(Section 5.2.1). If the decimal is not
present, the computer is not calling for
heat and may be malfunctioning. Shut
the fryer off and call FASC.