Troubleshooting Guides; Troubleshooting The 24 Vac Circuit - Frymaster Pro H50-Series Service And Parts Manual

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Power light on, heat light cycling, trouble light off, and melt light on:

• If fryer oil temperature is below 180ºF (82ºC), the lights indicate the unit is operating

normally.

• If the oil temperature is above 180ºF (82ºC) and the heat light continues to cycle as if in the

melt cycle, this may indicate a defective probe circuit or low incoming 12VAC to the

controller.

Power light on, heat light on, trouble light off, and melt light off:

• If the fryer oil temperature is above 180ºF (82ºC) and below the setpoint temperature, the

lights indicate the unit is operating properly.

• If the oil temperature is above the temperature set on the control knob and the heat light

remains lit, this may indicate a defective probe circuit.

Power light on, heat light off, trouble light on, and melt light off:

• If the fryer oil temperature is below 410ºF (210ºC), the lights indicate one of the following:

a. The probe circuit is defective, or

b. There is a connection problem on pins 2 or 10 on the 15-pin wiring harness.

• If the fryer oil temperature is above 410ºF (210ºC), the lights indicate a run-away heating circuit.

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Troubleshooting Guides

The troubleshooting guides on the following pages are intended to assist service technicians in

quickly isolating the probable causes of equipment malfunctions by following a logical, systematic

process. An additional set of operator troubleshooting guides is contained in Chapter 6 of the Pro

H50-Series Installation and Operation Manual (P/N 819-5991).

technicians thoroughly familiarize themselves with both sets.

Prior to checking for problems associated with the 24 VAC circuit, ensure that the unit is connected

to a power supply, the drain valve is fully closed, and the controller is on and is calling for heat

(decimal appears between first two digits in controller display).

NOTE: All voltage measurements must be made within 4 seconds of the unit calling for heat. If

unit does not fire within 4 seconds, ignition modules will lock out and controller must be turned off,

then on to reset.

It is suggested that service

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