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6-3
Problem Probable Causes Corrective Action
Fryer repeatedly
cycles on and off
when first started.
Fryer is in melt-cycle mode.
This is normal. The standard
operational mode for the controller
is for the elements to cycle on and
off until the temperature in the
frypot reaches 180ºF (82ºC). The
purpose of the melt-cycle is to
allow controlled melting of solid
shortening to prevent scorching
and flash fires or damage to the
element.
Fryer does not heat
after filtering.
Drain valve is open.
This fryer is equipped with a drain
safety switch that prevents the
heating element from being
energized if the drain valve is not
fully closed. Verify that the drain
valve is fully closed.
Fryer heats until
high limit trips with
heat indicator ON.
Temperature probe or controller has
failed.
If available, substitute a controller
known to be working for the
suspect controller. If the substitute
controller functions correctly,
order a new controller. If
substitution of the controller does
not resolve the problem, the most
likely cause is a failed temperature
probe.
Fryer heats until
high limit trips
without heat
indicator ON.
Contactor or controller has failed.
If available, substitute a controller
known to be working for the
suspect controller. If the substitute
controller functions correctly,
order a new controller. If
substitution of the controller does
not resolve the problem, the most
likely cause is a contactor failed in
the closed position.
Fryer stops heating
with heat indicator
ON.
The high limit thermostat or
contactor has failed.
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.