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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| While the unit is in Service Mode, the outlet | • Establish a heating load to remove the heat from the |
| temperature has exceeded 185°F. | water heater loop. |
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| • 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 water heater is piped properly into the |
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| heating system. Refer to Section 6 - System Piping |
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| of the Armor Water Heater Installation and Operation |
|
| Manual for the proper piping methods for the Armor |
Service Blk |
| water heater. |
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| • Check 120 VAC to the water heater pump motor on a |
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| call for heat. If voltage is not present, check the wiring |
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| back to the main control board. Replace the main |
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| control board if necessary. |
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| • If 120 VAC is present on a call for heat and the water |
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| heater pump is not operating, replace the pump. |
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| • Verify that the water heater pump is set to the proper |
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| speed or that the water heater pump is the proper |
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| size. Reference Section 6 - System Piping of the |
|
| Armor Water Heater Installation and Operation |
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| Manual for water heater pump specifications. |
|
|
|
| 120 VAC input to the main control board has | • Check 120 VAC supply to the transformer. |
| dropped below 80 VAC. |
|
Low 24 VAC |
| • Check wiring connections at the low voltage terminal |
| strip. | |
|
| • Check the wire size/length to remote devices. |
|
| • Replace the transformer. |
Watch Dog Error | The main control board has detected an | • Replace the main control board. |
internal fault. |
| |
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|
Write EEProm | The main control board has detected an | • Replace the main control board. |
internal fault. |
| |
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| The main control board has detected an | • Replace the main control board. |
CRC Parameters | internal fault. |
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| The main control board has detected an | • Replace the main control board. |
No Error Stored | internal fault. |
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