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condition |
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| setpoint? |
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| No |
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Correct
temperature
setpoint?
No
Properly set temperature
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| Are configuration | |
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| settings set properly, | |
Yes |
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| per Section III, Para. | ||
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Yes
Diagram 3 |
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White | 1 |
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Black | 2 |
| Is there | |
Red | 3 |
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208/240V across | ||||
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Yellow | 4 | terminals of J5 on the | ||
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| control board as shown | ||
| J5 |
| in the | |
| diagram 3? | |||
For 1 contactor: |
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check voltage across 1 & 4 |
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For 2 contactor: |
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check voltage across 1 & 3 and 1 & 4 | ||||
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No
No
Replace contactor
setpoint
Contact factory
Plug probe end into RJ45 pigtail
(not supplied). Check ohms
across terminals 1and 4
(see diagrams 1 & 2). Compare 
this with the ohms the thermistor
should supply for the actual
temperature in the tank
Do ohms match?
No
Replace probe
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Yes |
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OK?
No
Any or all buttons do not work, but display is operational.
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| cable from display |
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| OK? | |||
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| to control board |
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| Verify that the |
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| display is properly |
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Individual display |
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elements do not |
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| cable from display |
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work or unusual |
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| to control board. Be |
| OK? |
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characters are |
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| sure ribon cable is |
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displayed |
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| not reversed. |
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No
seated to the base |
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| OK? | ||
and that the |
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buttons click when |
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pressed. |
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Replace digital
display
OK?
No
Replace digital
display
Replace control
board
OK?
No
Replace control
board
24
