Service Manual
3 Troubleshooting
Table
FAULT | DESCRIPTION | CORRECTIVE ACTION | ||
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Sensor Shorted |
| • Check the sensors and their associated wiring. | ||
| Repair or replace the sensor or wiring if damaged. | |||
(will require a manual reset | Either the inlet water or outlet water | • Measure the resistance of the sensors and compare | ||
once the condition has been | ||||
corrected. Press the RESET | temperature sensor has been shorted. | the resistance to the tables on page 35 of this | ||
button on the SMART |
| manual. |
| |
SYSTEM display to reset.) |
| • Replace the sensor if necessary. |
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Louver Proving |
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Sw |
| • Check function of remote devices. | ||
(will require a manual reset | An optional remote proving switch is not | |||
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once the condition has been | making. | • Check for loose or misplaced | jumper if auxiliary | |
corrected. Press the RESET |
| proving switch is not installed. |
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button on the SMART |
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SYSTEM display to reset.) |
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Inlet Sensor |
| • Check wiring to sensor. Make sure wiring is | ||
| connected and not damaged. | Reconnect / repair | ||
Fault |
| wiring if necessary. |
| |
(will require a manual reset | The control reads the inlet sensor as open | • Measure the resistance of the sensor and compare to | ||
once the condition has been | ||||
corrected. Press the RESET | or shorted. | the resistance in Table | ||
button on the SMART |
| Replace sensor if necessary. |
| |
SYSTEM display to reset.) |
| • Replace control module. |
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Outlet Sensor |
| • Check wiring to sensor. Make sure wiring is | ||
| connected and not damaged. | Reconnect / repair | ||
Fault |
| wiring if necessary. |
| |
(will require a manual reset | The control reads the inlet sensor as open | • Measure the resistance of the sensor and compare to | ||
once the condition has been | ||||
corrected. Press the RESET | or shorted. | the resistance in Table | ||
button on the SMART |
| Replace sensor if necessary. |
| |
SYSTEM display to reset.) |
| • 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 | ||
Outlet Temp Diff |
| wiring if necessary. |
| |
| • 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 | temperature difference between the two | the resistance in Table | ||
corrected. Press the RESET | sensors. | Replace sensor if necessary. |
| |
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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