Testing Heating Elements; Testing The Temperature Setting Potentiometers; Testing The Temperature Control Modules - Pitco E7 Service, Parts And Schematics

4.3

TESTING HEATING ELEMENTS

To check a heating element first place the OFF-ON-START switch in OFF. Check the elements by
performing the following:
a. The terminal block that connects the heating elements to the fryer is located behind the
large rear access panel. Move the fryer out and remove the access panel.
b. Using an OHM meter check continuity from one end of the element to the other. The
reading should be very low (a few ohms). If the element indicates an open circuit, replace
the element.
c. Next check from the hot side of the element to ground. It should be infinite, if it is not
replace the element.
4.4

TESTING THE TEMPERATURE SETTING POTENTIOMETERS

The temperature setting potentiometer is a variable resistors. To test the potentiometer ensure that
the OFF-ON-START switch is OFF and perform the following:
a. For thermostat knobs mounted on the front of the fryer, remove the front bezel to gain
access to the back of the potentiometer. If the fryer has the thermostat knob mounted
behind the door (in the entrance box), remove the entrance box cover to gain access to
the back of the potentiometer.
b. Disconnect P10 from J10.
c. Connect an ohm-meter to pin 3 (yellow wire) and pin 1 (violet wire) and rotate the
temperature control knob. The resistance should vary from 0 to 900 ohms.
b. Connect the ohm-meter between pin 3 (yellow wire) and pin 5 (orange wire) and rotate
the knob. The resistance should again vary from 0 to 900 ohms. If the resistance is not
within the ranges specified replace the temperature setting potentiometer.
4.5

TESTING THE TEMPERATURE CONTROL MODULES

The temperature control module receives 24 VAC when the OFF-ON-START switch is ON. To test
the temperature control module perform the following:
a. The temperature control module is located behind the front bezel. Remove the two screws
that hold the bezel in place and move out of the way.
b. Place the OFF-ON-START switch in ON and the Melt switch in OFF. This will apply 24
VAC to pin 1 (black wire) with pin 3 as the common (white wire) of the temperature control
module.
4-4