Frymaster CT16 Series Technician Troubleshooting, Problem, Probable Causes, Corrective Action

1.4 Technician Troubleshooting

PROBLEM	PROBABLE CAUSES	CORRECTIVE ACTION
		A. Check for line voltage on the primary
		(line) side of transformer and 12VAC on
	A. Failed transformer.	secondary (load) side of transformer. If
		line voltage is present but secondary
		voltage is not 12VAC, the transformer has
		failed.
Display remains blank		B. Check continuity between right terminal
		of secondary (load) side of transformer
when unit turned on.	B. Failed computer.
		and Pin 9 of the 9-pin connector when the
		cover interlock switch is closed. If
		resistance is zero, replace the computer.
	C. Failed cover interlock switch or failed	C. Check continuity between switch
		terminals when the switch is closed.
	high limit.	If resistance is infinite, replace switch. If
		resistance is zero, replace high limit.
	A. Failed motor.	A. If platen is heating, replace motor.
Computer display is on, but	B. Broken/loose wire between computer and	B. Check for 12VDC on Pins 6 & 7 of
motor is not running		computer. If present and wiring is intact,
	latch relay or failed latch relay.	replace latch relay. If not present, replace
		computer.
Motor is running at wrong
speed (i.e. average time for	A. Toaster improperly configured for power	A. Check data plate for voltage rating, and
three individual buns to
pass through toaster is	supply.	verify that power supply and toaster
		match.
NOT between 15 and 18
seconds).
	A. Improper power-supply.	A. Verify that the power supply is 20 amp
		single-phase 200, 208 or 240VAC
		(depending upon model).
		B. Use a temperature-measuring device to
		determine actual platen temperature. If
		measured temperature is within 10 degrees
	B. Failed temperature probe.	of the temperature displayed on the
		computer and the probe resistance at pins
Platen heats, but unit does		3 and 5 of the 9-pin connector does not
		correspond to the appropriate value in the
not reach setpoint.		probe resistance chart on Pages 24 and 25,
		replace the probe.
		C. Use a temperature-measuring device to
		determine actual platen temperature. If
		measured temperature is within 10 degrees
	C. Failed computer.	of the temperature displayed on the
		computer and probe resistance at pins 3
		and 5 of the 9-pin connector corresponds
		to the value in the probe resistance chart
		on Pages 24 and 25, replace the computer.

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