Technician Troubleshooting Guides (Continued)

Before performing the following checks, disconnect the unit from the electrical power source and check all wiring connections involved to ensure they are secure.

Each of the following checks is to be performed with the unit connected to the electrical power supply, with the controller on and calling for heat, and with enough water in the cookpot to cover the lower water level sensor.

TROUBLESHOOTING

TROUBLESHOOTING

THE HIGH-LIMIT

THE TEMPERATURE

THERMOSTAT

PROBE

Is 24VAC

 

 

 

High-limit has

 

Water boils in

 

 

 

 

 

 

 

What is the

 

 

 

 

 

Water temperature

present at the C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is too low in

 

No

 

 

simmer mode.

 

 

 

 

 

 

 

problem?

 

 

 

 

 

terminal of the

 

 

failed. Replace.

 

 

 

 

 

 

 

 

 

 

 

 

 

simmer mode.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

high-limit?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check for shorted probe circuit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High-limit is OK.

 

 

 

 

Probe voltage at pin 13 should be:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx 1.8VDC @ 60ºF (16ºC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx 2.0VDC @ 100ºF (38ºC)

 

 

 

 

 

 

 

 

 

 

Check continuity

 

 

 

 

 

 

 

 

 

Approx 2.5 VDC @ 212ºF (100ºC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of probe.

 

 

 

 

 

 

 

 

Probe resistance should be:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx 552 ohms @ 60ºF (16ºC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx 655 ohms @ 100ºF (38ºC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Approx 1000 ohms @ 212ºF (100ºC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Are readings

 

 

 

 

Probe is OK.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

within

 

Yes

 

 

Calibrate

 

 

Yes

 

Continuity OK?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

specifications?

 

 

 

 

controller.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

No

 

TROUBLESHOOTING

 

 

 

 

 

 

Probe is shorted.

 

 

 

 

 

 

 

 

 

 

Probe is open.

THE CONTACTOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COIL

 

 

 

 

 

 

Replace.

 

 

 

 

 

 

 

 

 

 

Replace.

Is 24VAC

 

 

 

Is button in the

 

 

 

 

present at pin 4 of the 15-

 

 

 

 

 

 

Contactor coil has

 

No

 

center of the contactor

 

No

 

pin plug when controller is

 

 

 

 

failed. Replace.

 

 

 

block depressed?

 

 

 

 

 

 

 

 

calling for heat?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Probable cause is

 

 

 

Contactor coil is

 

 

 

 

failed controller.

 

 

 

OK. Element has

 

 

 

 

 

 

 

 

 

 

 

failed. Replace.

 

 

 

 

6-15

Page 40
Image 40
Frymaster 8BC, 8SMS, 8C manual Is 24VAC

8C, 8BC, 8SMS specifications

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