3 Troubleshooting
Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Operator Interface
FAULT | DESCRIPTION |
| CORRECTIVE ACTION |
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| The outlet water temperature has exceeded | • Verify setting of adjustable high limit. |
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| the setting of the adjustable high limit. | • Verify that the system is full of water and that all air | ||||
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| has been properly purged from the system. |
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| • Verify that the appliance is piped properly into the | ||||
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| system. Refer to the Water Connections Section of | ||||
Manual Reset |
| the | Installation | and | Operation Manual | for |
| proper piping methods for the |
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High Limit |
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| • Check 120 VAC to the pump motor on a call for heat. | |||||
(Will require a manual |
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reset once condition has |
| If voltage is not present, check wiring leading to the | ||||
| main control board. Replace the main control board if | |||||
been corrected. Press |
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| necessary. |
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the RESET button on |
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the SMART SYSTEM |
| • If 120 VAC is present on a call for heat and the pump | ||||
display to reset.) |
| is not operating, replace the pump. |
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| • If the system pump is a variable speed pump, ensure | ||||
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| the system flow is not less than the boiler flow. |
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| • Check temperature setting of the main control board. | ||||
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| • Check resistance of water sensors and compare to | ||||
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| the tables on page 35 of this manual. Replace the | ||||
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| sensor if necessary. |
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| • Replace outlet sensor or high limit. |
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| The inlet water temperature did not exceed | • Raise temperature setpoint above 130°. |
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| 130° within 15 minutes of ignition. | • Install a | ||||
Inlet Low |
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| diagram in the Water Connections Section of the | |||||
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| Installation and Operation Manual. |
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| • Replace the inlet sensor. |
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| • Replace the main control board. |
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Sensor Open |
| • Check the sensors and | their associated wiring. | |||
| Repair or replace the sensor or wiring if damaged. | |||||
(Will require a manual |
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Either the inlet water, outlet water, system |
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reset once the condition | • Measure the resistance of the sensors and compare | |||||
has been corrected. Press | supply, system return, or outdoor temperature | |||||
the RESET button on the | sensor has been disconnected. | the | resistance to | the tables on page 35 of | this | |
manual. |
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SMART SYSTEM display |
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to reset.) |
| • Replace the sensor if necessary. |
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Sensor Shorted | Either the inlet water, outlet water, system | • Check the sensors and their associated wiring. | ||||
(Will require a manual | supply, system return, or outdoor temperature | Repair or replace the sensor or wiring if damaged. | ||||
reset once the condition | sensor has been shorted. | • Measure the resistance of the sensors and compare | ||||
has been corrected. Press |
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the RESET button on the |
| the resistance to the tables on page 35 of this | ||||
SMART SYSTEM display |
| manual. |
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to reset.) |
| • Replace the sensor if necessary. |
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