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Model 590/592
The electric fryer requires two switching contactors: a primary
and a heat contactor. The primary contactor energizes (contacts
close) any time the POWER/PUMP switch is in the POWER
position, and the temperature of the shortening is below 420
° F
( 215° C). The high limit cuts power at the primary contactor
if the temperature of the shortening is above 420° F ( 215° C).
The primary contactor supplies power to one side of the heat
contactor.
The heat contactor is controlled by the computer controller.
When the controller calls for heat, the heat contactor applies
power to one side of the heating elements. When the heat con-
tactor and primary contactor are energized (contacts closed) the
electric heating elements heat the shortening.
The photo shows a mercury heat contactor, but CE coun-
tries will have an electromechanical heat contactor.
Checkout
1. Remove electrical power supplied to the fryer.
To avoid electrical shock or property damage, move the
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove the control panel.
3. Label and remove wires from contactors and perform a
check on both contactors as follows:
Test Points Results
From 23 to 29 open circuit
From 24 to 28 open circuit
From 25 to 27 open circuit
From 30 to 34 open circuit
From 31 to 35 open circuit
From 32 to 36 open circuit
From 33 to 37 ohm reading 1700
From 22 to 26 ohm reading 415
2-19. CONTACTORS
Primary
Heat
1103 2-17
30 31 32
34 35 36