Service Manual
3Troubleshooting
Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface
FAULT | DESCRIPTION | CORRECTIVE ACTION | |
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| • Vent/air intake lengths exceed the maximum allowed | |
| The actual fan RPM is 30% lower than what | lengths. Refer to Section 3 - General Venting of the | |
Fan Low | is being called for. | Armor Water Heater Installation and Operation Manual | |
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| for proper lengths. | ||
OR |
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| • Check for obstruction or blockage in the vent/air | ||
Fan Speed Low |
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| intake pipes or at terminations. | ||
(will require a manual |
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reset once the condition |
| • Check the wiring connections at the fan and at the | |
has been corrected. Press |
| main control board. | |
the RESET button on the |
| • Replace the fan. | |
SMART SYSTEM display |
| • Replace the main control board. | |
to reset.) |
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| • Replace fuse F4 on the control board, see page 24 of | |
| Blown fuse. | this manual. | |
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GV/Relay | The main control board did not detect the | • Check wiring harness connection at the gas valve and | |
Fail | gas valve. | at the main control board. | |
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(will require a manual |
| • Replace the gas valve wire harness. | |
reset once the condition |
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has been corrected. Press |
| • Replace the gas valve. | |
the RESET button on the |
| • Replace the main control board. | |
SMART SYSTEM display |
| ||
to reset.) |
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| • Vent/air intake lengths exceed the maximum allowed | |
Fan High |
| lengths. Refer to Section 3 - General Venting of the | |
| Armor Water Heater Installation and Operation | ||
OR |
| Manual for proper lengths. | |
Fan Speed High |
| • Check for obstruction or blockage in the vent/air | |
(will require a manual |
| ||
| intake pipes or at terminations. | ||
reset once the condition | The actual fan RPM is 30% higher than what | ||
| |||
has been corrected. Press | is being called for. | • Check the wiring connections at the fan and at the | |
the RESET button on the |
| ||
| main control board. | ||
SMART SYSTEM display |
| ||
|
| ||
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 |
| ||
| the resistance to the tables on page 26 of this | ||
the RESET button on the |
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| manual. | ||
SMART SYSTEM display |
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to reset.) |
| • Replace the sensor if necessary. | |
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