Chapter 6 Status indicators for operation and communication
Table 16. Diagnostics (Continued)
Diagnostic | Probable cause | Consequences | Diagnostic | |
type | ||||
|
|
| ||
|
|
|
| |
Space Temperature Failure | Invalid or missing value | Fan off | Automatic | |
| for zone temperature | Valves closed |
| |
|
| Outdoor air damper closed |
| |
|
| Face and bypass damper bypass |
| |
|
| DX/electric heat off |
| |
|
| Baseboard heat off |
| |
|
|
|
| |
Entering Water Temp Failure | Invalid or missing value | Fan unaffected (enabled) | Automatic | |
| for zone temperature | Valves unaffected |
| |
|
| Outdoor air damper unaffected |
| |
|
| Face and bypass damper unaffected |
| |
|
| DX/electric heat unaffected |
| |
|
| Baseboard heat off |
| |
|
|
|
| |
Discharge Air Temp Limit | Discharge air tempera- | Fan off | Automatic | |
| ture has fallen below the | Valves open |
| |
| Discharge Air Tempera- | Outdoor air damper closed |
| |
| ture Low Limit | Face and bypass damper bypass |
| |
|
| DX/electric heat off |
| |
|
| Baseboard heat off |
| |
|
|
|
| |
Discharge Air Temp Failure | Invalid or missing value | Fan off | Automatic | |
| for discharge air temper- | Valves closed |
| |
| ature | Outdoor air damper closed |
| |
|
| Face and bypass damper bypass |
| |
|
| DX cooling/electric heat off |
| |
|
| Baseboard heat off |
| |
|
|
|
| |
Outdoor Air Temp Failure | Invalid or missing value | Fan unaffected | Automatic | |
| for outdoor air tempera- | Valved unaffected |
| |
| ture | Outdoor air damper minimum |
| |
|
| position |
| |
|
| Face and bypass damper unaffected |
| |
|
| DX cooling/electric heat unaffected |
| |
|
| Baseboard heat unaffected |
| |
|
|
|
| |
Humidity Input Failure | Invalid or missing value | Fan unaffected | Automatic | |
| for relative humidity | Valves unaffected |
| |
|
| Outdoor air damper unaffected |
| |
|
| Face and bypass damper unaffected |
| |
|
| DX cooling/electric heat unaffected |
| |
|
| Baseboard heat unaffected |
| |
|
| Dehumidification sequence off |
| |
|
|
|
| |
CO2 Sensor Failure | Invalid or missing value | Fan unaffected | Informational | |
| for CO2 | Valves unaffected |
| |
|
| Outdoor air damper unaffected |
| |
|
| Face and bypass damper unaffected |
| |
|
| DX cooling/electric heat unaffected |
| |
|
| Baseboard heat unaffected |
| |
|
|
|
|
60 |
|
