TROUBLESHOOTING SECTION
WARNING: Inspection, testing and repair of electrical equipment should only be performed by a qualified service techni- cian. Many of the tests require that the unit have power to it and live electrical components be exposed.
USE EXTREME CAUTION WHEN TESTING THE MACHINE.
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| Symptom | Possible Cause | Action |
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| The unit ignites, but will to rise above | Check |
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| ignition burn. |
| board set points. |
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| Check |
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| Obstruction in gas burners or gas nozzles. | Remove burner manifold and check for |
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| obstructions. |
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| Control board damaged. | Replace control board. |
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| Exhaust contains dark smoke. | Incorrect gas nozzles for type of gas being | Remove burner manifold and check correct |
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| used. | nozzle orifice size. |
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| Gas leak may be present. | Check for localized large yellow flame, or a |
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| flame located above the burner. |
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| Obstruction in heat exchanger vent or air | Check for obstructions. |
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| intake. |
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| Ignition attempt with flame already burning. | Flame proofing not occurring. | Check ignition wire. Check that lights |
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| above connection point to DSI are dimly lit |
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| (proofing signal is present). |
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| Heat exchanger and recirculating pump de- | Failure or incorrect setting of thermostat. | Back thermostat CCW one full turn and |
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| energize at end of rinse cycle with wash |
| restart unit. When cycle completes, set |
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| tank temperature below 170 F (76.67 C). |
| thermostat to 170 F (76.67 C) by turning |
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| CW. |
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