EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
Table 24. Excel 10 FCU Controller alarms.
| Name of alarm or alarm bit | alarm type |
| meaning of alarm code or alarm bit |
| number |
| ||
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|
|
| |
| No Alarm/Return to Normal: |
|
|
|
| RETURN_TO_NORMAL | 128 |
| Return to no error after being in an error condition. This code is added |
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|
|
| numerically to another alarm code to indicate that the error condition has |
|
|
|
| returned to normal. |
| ALARM_NOTIFY_DISABLED | 255 | The alarm reporting has been turned OFF by the nviManualMode | |
|
|
|
| =SUPPRESS_ALARMS. No more alarms are reported until |
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|
|
| nviManualMode turns ON alarm reporting or upon application restart. |
| ALM_NO_ALARM | 0 | No errors since last application restart; initial condition | |
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|
|
|
| FCU Alarms: |
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|
|
| ALM_NODE_OFF | 1 | The control algorithm has stopped due to controller disabled, or in test | |
|
|
|
| mode, or other conditions |
| ALM_FROST | 2 | The space temperature is below the frost alarm limit. The alarm condition | |
|
|
|
| remains until the temperature exceeds the alarm limit plus hysteresis. |
| ALM_INVALID_SETPNT | 3 |
| One of the setpoints is not in the valid range |
| ALM_TEMP_SENSOR_FAIL | 4 | Temperature sensor failed | |
|
|
|
| |
| ALM_SETPNT_KNOB_FAIL | 5 | Remote setpoint potentiometer failed | |
| ALM_FAN_SPEED_SW_FAIL | 6 | Fan speed switch failed | |
| ALM_FAN_FAILURE | 7 |
| Fan is commanded to be ON, but the air flow detector input does not |
|
|
|
| detect the fan running. |
| ALM_COMFAIL_SPACE_TEMP | 8 | nviSpaceTemp is bound and has failed in receiving an update within its | |
|
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|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_HVACMODE | 9 | nviApplicMode is bound and has failed in receiving an update within its | |
|
|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_SETPTOFFS | 10 | nviSetPtOffset is bound and has failed in receiving an update within its | |
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|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_SCHEDOCC | 11 | nviTodEvent is bound and has failed in receiving an update within its | |
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|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_DLC | 12 | nviDlcShed is bound and has failed in receiving an update within its | |
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|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_TEMPRESET | 13 | nviTempReset is bound and has failed in receiving an update within its | |
|
|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_ODTEMP | 14 | nviOdTemp is bound and has failed in receiving an update within its | |
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|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_OCCSENSOR | 15 | nviSensorOcc is bound and has failed in receiving an update within its | |
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|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_WINDOW | 16 | nviWindow is bound and has failed in receiving an update within its | |
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|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_MANHEAT | 17 | nviManHeat is bound and has failed in receiving an update within its | |
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|
|
| specified FAILURE_DETECT_TIME |
| ALM_COMFAIL_MANCOOL | 18 | nviManCool is bound and has failed in receiving an update within its | |
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|
| specified FAILURE_DETECT_TIME |
| ALM_HW_SW_MISMATCH | 19 |
| The software is not compatible with the hardware configuration specified |
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|
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| by the hardware configuration resistor value. Compatibility is checked |
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| only once after application restart. |
31 |