Frymaster H20.5 SERIES Installation & Operation Manual page 27

5.2.1 Control and Heating Problems (cont.)
Problem
Fryer heats until high-
limit trips without
heat indicator ON.
Fryer stops heating
with heat indicator
ON.
5.2.2 Error Messages and Display Problems
Problem
CM III.5 display is in
wrong temperature
scale (Fahrenheit or
Celsius).
CM III.5
or
Digital Controller
display shows
.
Probable Causes
Contactor or controller has failed.
The high-limit thermostat or contactor
has failed.
Probable Causes
Incorrect display option programmed.
Open drain valve or problem with
latching circuitry.
Corrective Action
Call FASC.
The fact that the heat indicator is ON
indicates that the controller is
functioning properly and is calling for
heat. The high-limit thermostat
functions as a normally closed switch.
If the thermostat fails, the "switch"
opens and power to the elements is
shut off. If the contactor fails to close,
no power is supplied to the elements.
Determining which component has
failed is beyond the scope of operator
troubleshooting. Call FASC.
Corrective Action
CM III.5 computers may be
programmed to display in either
Fahrenheit or Celsius. Refer to the
separate Frymaster Fryer Controllers
User's Manual for instructions on
changing the display.
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.
5-4