14.
Fault Isolation Procedure
Step
Test
1.
Remove wire from low water level probe and ground the wire to the body of the kettle. Does the red LED turn off?
Yes
Replace or clean defective low water level probe.
No
Spray contact cleaner on control box terminals and edge connector. Try box again. If problem still exist, replace
defective control box.
Possible Causes
1.
Defective low water level probe
2.
Defective control box.
D/ Problem:
Red LED remains illuminated even though water has been added.
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.
3.
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 #
4
.
No
Replace defective thermistor.
4.
Turn the potentiometer on the control box counter-clockwise to decrease the maximum operating temperature. does
the kettle continue to overheat?
Yes
Spray contact cleaner on control box terminal and edge connector. Try box again. If problem still exists, replace defective control box.
No
Kettle is operating correctly.
B/ MECHANICAL CHECKS
1.
Inspect controls, replace damaged seals, switches,
LED's etc..
2.
Remove the console cover and check that the seal is
not cracked or split. Replace seal, screws, missing or
worn nylon anchor nuts.
Leave cover off
.
3.
Remove the kettle bottom cover and check that the seal
is not cracked or split.
Leave cover off
.
4. For units with tilt crank-
A. Check that the kettle tilts smoothly. If there is excess play adjust the worm to gear
clearance with Locking Nuts or Adjusting Screw as required.
B. Check that there is no excessive wear in the trunnion bearings.
C. Apply grease to gear teeth and bearings.
SAFETY INSPECTION CHECKLIST
NOTE:
The following instructions are intended for use by qualified service personnel.
The following steps should be completed IN SEQUENCE.
A/ KETTLE PREPARATION
1.
Disconnect main power at fused disconnect switch.
2.
Kettle should be cold. If necessary add water to kettle pot to cool unit.
3.
The pressure gauge should now show a vacuum and have no indication of leakage.
If gauge gauge looks damaged replace gauge.
4.
Gauge must be showing a vacuum prior to proceeding. If not check for leaks, and repair
kettle prior to proceeding. Refer to REFERENCE SECTION (KETTLE VENTING INSTRUCTIONS).
Adjusting
Screw
Worm
Screw and
Tilt
Gear
Cross
Bar
Locking
Nuts
Illustration inverted for clarity.
Grease Nipples.
Pressure Gauge in Vacuum.
