Service Manual
3 Troubleshooting (continued)
Table
FAULT | DESCRIPTION |
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| CORRECTIVE ACTION | |
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| • Check | wiring to sensor. Make sure wiring is | ||
Flue Sensor Fault |
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| connected and not damaged. | Reconnect / repair | |
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| wiring if necessary. |
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(will require a manual reset |
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The control reads the flue sensor as open |
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once the condition has been | • Measure the resistance of the sensor and compare | ||||
corrected. Press the RESET | or shorted. |
| to the resistance in Table | ||
button on the SMART |
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| manual. Replace the sensor if necessary. | |||
SYSTEM display to reset.) |
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| • | Replace control module. |
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| • Check | wiring to sensor. Make sure wiring is | ||
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| connected and not damaged. Reconnect / repair | ||
Flue Temp Diff |
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| wiring if necessary. |
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| • Measure the resistance of the sensor and compare to | ||||
(will require a manual reset | The control module reads an excessive | ||||
once the condition has been |
| the resistance in Table | on page 35 of this | ||
corrected. Press the RESET | temperature difference between the two |
| manual. Replace sensor if necessary. | ||
sensors. |
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button on the SMART |
| • | Restore control parameter defaults from optional PC | ||
SYSTEM display to reset.) |
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| software. |
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| • | Replace control module. |
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| • Inspect the heat exchanger. Reference page 32 of | |||
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| this manual for the procedure on how to clean the flue | ||
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| side of the heat exchanger. |
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Flue Temp Limit |
| • Inspect | the flue sensor and | associated wiring. | |
(will require a manual reset |
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The stack temperature has exceeded the |
| Measure the resistance of the flue sensor and | |||
once the condition has been |
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| compare to Table | ||||
corrected. Press the RESET Flue Temp Limit set parameters. |
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| Replace the sensor if necessary. | ||||
button on the SMART |
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SYSTEM display to reset.) |
| • Verify that the vent/air intake | pipes are properly | ||
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| installed and that there are no obstructions. | ||
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| • Replace the main control board. |
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| • Restore the parameter defaults from the optional PC |
Fatal Error | The control module has detected parameter | software. |
settings that are out of range. |
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| • Replace control module. | |
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Memory Error
A lockout occurs at the same time as a power outage.
• Reset control module.
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