Service Manual
3Troubleshooting (continued)
Table 3E (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT | DESCRIPTION | CORRECTIVE ACTION | ||||
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| The actual fan RPM is 30% higher than what | • Vent/air intake lengths exceed the maximum allowed | ||||
Fan High | is being called for. | lengths. Refer to Section 3 - General Venting of the | ||||
| Armor Water Heater Installation and Operation | |||||
OR |
| Manual for proper lengths. |
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Fan Speed High |
| • Check for obstruction or blockage in the vent/air | ||||
(will require a manual |
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| intake pipes or at terminations. | |||||
reset once the condition |
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has been corrected. Press |
| • Check the wiring connections at the fan and at the | ||||
the RESET button on the |
| main control board. |
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SMART SYSTEM display |
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to reset.) |
| • Replace the fan. |
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| • Replace the main control board. | ||||
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Sensor Open | Either the inlet water or outlet water | • Check the sensors and their associated wiring. | ||||
(will require a manual | temperature sensor has been disconnected. | Repair or replace the sensor or wiring if damaged. | ||||
reset once the condition |
| • Measure the resistance of the sensors and compare | ||||
has been corrected. Press |
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| the resistance to the tables | on page 23 of this | ||||
the RESET button on the |
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| 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 or outlet water | • Check the sensors and their associated wiring. | ||||
(will require a manual | temperature sensor has been shorted. | Repair or replace the sensor or wiring if damaged. | ||||
reset once the condition |
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has been corrected. Press |
| • Measure the resistance of the sensors and compare | ||||
the RESET button on the |
| the resistance to the tables on page 23 of this | ||||
SMART SYSTEM display |
| manual. |
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to reset.) |
| • Replace the sensor if necessary. | ||||
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Aux. Proving | An optional remote proving switch is not | • Check function of remote devices. | ||||
(will require a manual | making. | • Check for loose or misplaced jumper if auxiliary | ||||
reset once the condition |
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has been corrected. Press |
| proving switch is not installed. |
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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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| The flue temperature has exceeded the set | • Inspect the heat exchanger. | Reference page 20 of | |||
| parameters for the water heater. | this manual for the procedure on how to clean the flue | ||||
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| side of the heat exchanger. |
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| • Inspect the flue sensor and associated wiring. | ||||
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| Measure the resistance of the flue sensor and | ||||
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| compare to Table 3C on page 23 of this manual. | ||||
Temp O/Shoot |
| Replace the sensor if necessary. | ||||
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| • 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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| Scaling has reduced water flow. | • Deliming may be required. |
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