Service Manual
3Troubleshooting
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Boiler Interface
FAULT | DESCRIPTION | CORRECTIVE ACTION | |
Temp O/Shoot |
| • Verify that the boiler pump is set to the proper speed | |
(continued) |
| or that the boiler pump is the proper size. Reference | |
(will require a manual |
| Section 6 - Hydronic Piping of the Knight Wall Mount | |
reset once the condition | Outlet water temperature has exceeded the | Installation and Operation Manual for boiler pump | |
has been corrected. Press | maximum outlet water temperature. | specifications. |
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the RESET button on the |
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SMART SYSTEM display |
| • Replace the main control board. |
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to reset.) |
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| • Check set point of the external control. |
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Rem Ctrl Flt | External control is cycling too often. | • Check the wiring between the external control and the | |
unit. |
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| • Replace the control. |
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Parameters |
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Progr |
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(will require a manual | After downloading parameters from a laptop, | • Press the ENTER/RESET button on | the SMART |
reset once the condition | SYSTEM display panel. |
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the main control board must be reset. |
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has been corrected. Press |
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the RESET button on the |
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SMART SYSTEM display |
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to reset.) |
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| • Check the wiring connections to switch. Wires should | |
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| be connected to the common and normally closed | |
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| terminals. |
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| • Air intake lengths exceed the maximum allowed | |
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| lengths. Refer to Section 3 - General Venting of the | |
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| Knight Wall Mount Installation and Operation Manual | |
APS |
| for proper lengths. |
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| |
Open |
| • Check for obstruction or blockage | in the air |
(will require a manual |
| intake pipes or at terminations. |
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reset once the condition | Air pressure switch contacts are open. | • Check reference hoses connected to the air pressure | |
has been corrected. Press |
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the RESET button on the |
| switch for blockage or obstruction. |
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SMART SYSTEM display |
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to reset.) |
| • Inspect the burner. Reference page 26 of this manual | |
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| for removal and cleaning procedures. Replace if | |
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| necessary. |
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| • Inspect the heat exchanger. Reference page 27 of this | |
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| manual for removal and cleaning procedures. | |
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| Replace if necessary. |
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| • Faulty air pressure switch. Replace switch. | |
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