Replacing Heating Contactors (Electric Only)

Each well of an electric fryer requires two switching contactors. The first in line is the primary contactor and the second in line is the heat contactor. When open, the primary contactor does not allow power to flow to the heat contactor. When closed, the primary supplies voltage to the heat contactor. When the heat contactor is open, no voltage is supplied to the heating elements. When the heat contactor closes, voltage is supplied to the heating elements.

Checkout (Power Removed)

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

1. Remove electrical power supplied to the unit.

2. Remove the control panel.

3. Perform a check on the contactor.

Electromechanical Contactor

Test Points	Results
From 30 to 34	Open circuit
From 31 to 35	Open circuit
From 32 to 36	Open circuit
From 33 to 37	Ohm reading 5 to 6

Mercury Contactor

Test Points	Results
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

Checkout (Power Supplied)

The following checks are performed with the wall circuit breaker closed and the main power switch in the ON position.

Shock Hazard To avoid electrical shock or property damage, disconnect power before installing or servicing equipment. Lowering the control board exposes the technician to 240 VAC electricity inside the fryer.

1. Re-apply power to unit and turn power switch ON.

2. Check voltage.

Test Points	Results
From terminal 34 to 35	The voltage should read the same at each terminal
From terminal 35 to 36
From terminal 34 to 36

Replacing Mercury Contactor

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

If either contactor is defective it must be replaced.

1. With control panel removed and power off.

   

2. Remove only the wires directly connected to the contactor being replaced.

3. Label the wires for replacement.

   

4. Loosen the screws securing the contactor bracket to the shroud.

5. Remove the contactor from the bracket.

6. Reinstall.

Replacing the Electromechanical Contactor

To avoid electrical shock or property damage, move the power switch to OFF and disconnect power.

1. Remove only the wires directly connected to the contactor being replaced. Label the wires for replacement.

   

2. Remove nuts securing the contactor to the shroud.

3. Remove the contactor from unit.

4. Reinstall.