Frymaster 8BC, 8SMS, 8C manual Technician Troubleshooting Guides Continued, Check continuity

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.

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