Cleveland Range KET-3-T Possible Causes, Fault Isolation Procedure, Step Test, Result, Remedy

9.Measure continuity of ON/OFF switch/ temperature control. Is it operating properly?

10.Unplug control box and measure the resistance across potentiometer. Is it approximately 0 ohms at maximum setting and 50,000 ohms at minimum?

11.Remove edge connector from control box. While kettle is cold or thermistor is removed and allowed to cool, measure the resistance between edge connector’s pins #2 and #7. Is it approximately 100,00 ohms?

Yes	Go to step #10.
No	Replace defective ON/OFF switch/
	temperature control.
Yes	Go to step #11.
No	Replace defective potentiometer
	(ON/OFF switch/temperature control)
Yes	Spray contact cleaner on control box
	terminals and edge connector. Try box
	again, if the problem still exists, replace
	defective control box.
No	Replace defective thermistor.

B/ Problem: Kettle heats too slowly or not hot enough. (Note: normal max. operating pressure with an empty kettle is 30-35 psi.)

Possible Causes
1.	Air in jacket requires	3.	Defective potentiometer	5.	Defective contactor/s.
	venting.		(temperature control).	6.	Defective control box.
2.	Defective safety thermostat.	4.	Defective thermistor.	7.	Defective elements/s.

Fault Isolation Procedure

Step Test

1.In a cold state, does the pressure gauge read in the green zone?

2.Do the contactors shut off too early? (before reaching normal maximum operating pressure.)

3.Does the green LED remain illuminated after the contactors shut off?

4.Unplug control box and measure the resistance across potentiometer (temperature control). Is it approximately 0 ohms at maximum and 50,000 ohms at minimum setting?

Result	Remedy
Yes	Go to step #2.
No	There is air present in the jacket of the
	kettle. Follow Kettle Venting Procedure
	(page 18). If constant venting is required,
	there is a leak that should be corrected.
Yes	Go to step #3.
No	Check contactor contacts for pitting.
	Voltage across terminal of contactor
	while energized signifies a poor
	contact. Replace contactor/s as
	necessary. Check elements for short to
	ground or open circuit. If elements are
	defective, contact the factory. Elements
	are not field replaceable.
Yes	Replace defective safety thermostat.
No	Go to step #4.
Yes	Go to step #5.
No	Replace defective thermistor.
Yes	Go to step #6.

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