Diagnostic Guide, Possible Causes | Cleveland Range KET-3-T specification

DIAGNOSTIC GUIDE

This section contains servicing information intended for use by Authorized Service Personnel. NOTE 1: If Fault Isolation Procedure is required, be sure to start at step #1.

NOTE 2: On table type kettles the entire control mounting panel may be removed from kettle control housing for easier troubleshooting and parts replacement.

A/ Problem: Kettle is not heating at all. (Kettle must be on and temperature control set.)

Possible Causes

1.No incoming power.

2.Kettle is tilted.

3.Low water condition.

4.Defective ON/OFF switch.

5.Defective 12 VDC relay.

6.Defective safety thermostat. 10. Defective thermistor.

7.	Defective contactor/s.	11.	Defective 240/16 VAC
8.	Defective potentiometer		transformer.
	(temperature control).	12.	Defective control box.
9.	Defective low water level	13.	Defective elements.
	probe.

Fault Isolation Procedure

Step Test

1.Is there proper incoming voltage at terminal block?

2.Is the red LED illuminated?

3.Is the green LED illuminated?

4.Do both contactors energize?

5.Measure continuity across safety thermostat. Is it an open circuit?

6.Is there 120 VAC present across the coils of the contactors?

7.Remove wire from low water level probe and ground it to the body of the kettle. Do the contactors now energize?

8.Is there 16 VAC present at output of 16 VAC transformer?

Result	Remedy
Yes	Go to step #2.
No	Correct external power supply problem.
Yes	Follow Reservoir Fill Procedure (page
	18). If this does not correct the
	problem, go to Problem D.
No	Go to step #3.
Yes	Go to step #4.
No	Go to step #7.
Yes	Check contactor contacts for pitting. Voltage
	across contactor terminals while in a closed
	position indicates a poor contact. Replace
	contactor/s as necessary. Check elements
	for short at ground or an open circuit. If
	element/s are defective contact the factory.
	Elements are not field replaceable.
No	Go to step #5.
Yes	Replace defective safety thermostat.
No	Go to step #6.
Yes	Replace defective contactor/s.
No	Go to step #6.
Yes	Clean or replace defective low water
	level probe. Replace defective red LED.
No	Go to step #8.
Yes	Go to step #9.
No	Replace defective 240/16 VAC transformer.