Welbilt Cleveland KEL-100, Установка, Эксплуатация, Обслуживание, Запчасти и Сервис

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10.
Fault Isolation Procedure
Step Test
1. In a cold state, does the pressure gauge read in the green zone?
Yes Go to step # 2 .
No There is air present in the jacket of the kettle. Follow Kettle Venting Procedure. If constant venting is required, there is a
leak that should be corrected.
2. Do the contactors shut off too early? (before reaching normal maximum operating pressure.)
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.
3. Does the green LED remain illuminated after the contactors shut off?
Yes Replace defective safety thermostat.
No Go to step # 4 .
4. Unplug control box and measure the resistance across potentiometer. Is it approximately 0 ohms at maximum and
50,000 ohms at minimum setting?
Yes Go to step # 5 .
No Replace defective thermistor.
5. Remove kettle thermistor and allow to cool. Remove edge connector from control box. Test resistance across edge
connector's pins #2 and #7. Is it approximately 100,000 ohms?
Yes Go to step # 6 .
No Replace defective thermistor
6. Turn the potentiometer on the control box clockwise to increase the maximum operating temperature. Does the kettle
now achieve maximum operating pressure of 30-35 psi in an empty kettle?
Yes Kettle is operating correctly.
No Spray contact cleaner on control terminals and edge connector. Try box again. If problem still exists, replace defective
control box.
10. Unplug control box and measure the resistance across potentiometer. Is it approximately 0 ohms at maximum setting
and 50,000 ohms at minimum?
Yes Go to step # 11 .
No Replace defective potentiometer.
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 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.
Possible Causes
1. Air in jacket requires venting.
2. Defective safety thermostat.
3. Defective potentiometer.
4. Defective thermistor.
5. Defective contactor/s.
6. Defective control box.
7. Defective elements/s.
B/ Problem: Kettle heats too slowly or not hot enough. ( Note : normal max. operating pressure with an empty
kettle is 30-35 psi.)
Fault Isolation Procedure
Step Test
1. Does the green LED turn off even though the contactors remain energized?
Yes Replace defective 12 VDC relay.
No Go to step # 2 .
2. Unplug the control box and measure the resistance across the potentiometer, Is the resistance approximately 0 ohms at
maximum and 50,000 ohms at minimum setting?
Yes Go to step # 3 .
No Replace defective thermistor.
Possible Causes
1. Defective thermistor
2. Defective potentiometer.
3. Defective 12 VDC relay.
4. Defective control box.
C/ Problem: Kettle is overheating.