DIAGNOSTICS
Intermittent flashing of the READY indicator (Model CEZ) or the bank of temperature indicators (Model CDBC) indicates that a fault exists. Count the number of flashes between pauses and use this chart as a guide to investigating the fault.
FLASHES | CAUSE | THINGS TO CHECK |
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1 | Dry Plug - In Fault - | Water Pressure |
| Sheath of temperature probe dry for 10 minutes after | Temperature probe wiring |
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| Fill valve wiring, function, & strainer |
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| Green wire between tank and circuit board |
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2 | Low Tank Level Fault - | Water pressure |
| Level probe dry for 7 minutes after fill valve is energized | Level probe wiring |
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| Temperature probe wiring |
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| Fill valve wiring, function, & strainer |
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3 | Low Water Temperature Fault - | Tank heater wiring & function |
| Sensor in tank is calling for heat for 30 minutes or more | Temperature probe wiring |
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4 | Tank Sensor Disagreement - | Temperature probe wiring |
| Level probe detects water, but dry | Level probe wiring |
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| Green wire between tank and circuit board |
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5 | Temp Sensor | Sensor not connected to circuit board |
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6 | Temp Sensor | Sensor wires shorted together or to chassis |
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Page 20 | 29253 091603 |
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