12.
Fault Isolation Procedure
Step
Test
1.
Is there proper incoming voltage at terminal block?
Yes
Go to step #
2
.
No
Correct external power supply problem.
2.
Is the red LED illuminated?
Yes
Follow Reservoir Fill Procedure. If this does not correct the problem, go to Problem
D
.
No
Go to step #
3
3.
Is the green LED illuminated?
Yes
Go to step #
4
.
No
Go to step #
7
.
4.
Do both contactors energize?
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
.
5.
Measure continuity across safety thermostat. Is it an open circuit?
Yes
Replace defective safety thermostat.
No
Go to step #
6
.
6.
Is there 120 VAC present across the coils of the contactors?
Yes
Replace defective contactor/s.
No
Go to step #
7
.
7.
Remove wire from low water level probe and ground it to the body of the kettle. Do the contactors now energize?
Yes
Clean or replace defective low water level probe. Replace defective red LED.
No
Go to step #
8
.
8.
Is there 16VAC present at output of 16 VAC transformer?
Yes
Go to step #
9
.
No
Replace defective 240/16 VAC transformer.
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.
7.
Defective contactor/s.
8.
Defective potentiometer.
9.
Defective low water level probe.
10.
Defective thermistor.
11.
Defective 240/16 VAC transformer.
12.
Defective control box.
13.
Defective elements.
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.)
TROUBLESHOOTING AND
MAINTENANCE PROCEDURES
The following trouble shooting guide and maintenance
procedures are meant to be used by Qualified Service Technician
ANY REPAIRS TO THE PRESSURE VESSEL MUST BE DONE BY A CERTIFIED
PRESSURE VESSEL REPAIR SHOP AND ALL REPAIR METHODS AND MATERIALS
MUST BE APPROVED BY THE MANUFACTURER.
For periodic maintenance recommendations see “Operators Manual”.
Extreme caution must be taken if unit is electrically energized for testing.
Remove power from the unit while servicing.
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