Service Manual
3Troubleshooting (continued)
Table
FAULT | DESCRIPTION | CORRECTIVE ACTION |
|
|
|
| 120 vac input to the main control board has | • Check 120 vac supply to the transformer. |
| dropped below 80 vac. |
|
|
| • Check wiring connections at the low voltage |
Low 24 vac |
| 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. |
| |
|
|
|
Write EEProm | The main control board has detected an | • Replace the main control board. |
internal fault. |
| |
|
|
|
| The main control board has detected an | • Replace the main control board. |
CRC Parameters | internal fault. |
|
|
|
|
| The main control board has detected an | • Replace the main control board. |
No Error Stored | internal fault. |
|
|
|
|
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