Alarm# | Alarm description | Reset type | Alarm source | Action accordingly |
|---|---|---|---|---|
001 | Outside Air Temperature Sensor Fault | Automatic | Sensor, reliability value is not 0 | Prompts only |
002 | Supply Air Temperature Sensor Fault | Automatic | Sensor, reliability value is not 0 | Prompts only |
003 | Return Air Temperature Sensor Fault | Automatic | Sensor, reliability value is not 0 | Stops the unit |
004 | Return Air CO2 Sensor Fault | Automatic | Sensor, reliability value is not 0 | Prompts only |
005 | Low limit Temperature Alarm | Automatic | DI Switch Opens when alarm comes, closes when alarm goes | Stops the fan and outside air damper; fully opens the heating valve |
006 | Fan Fault Alarm | Manual | DI Switch Closes when alarm comes, opens when alarm goes | Stops the unit |
007 | Filter Alarm | Automatic | DI switch (NC contact) Checks differential pressure after the fan opens for a period. Opens when alarm comes, closes when alarm goes | Stops the unit |
008 | Fan Differential Pressure Alarm | Manual | DI switch (NO contact) Checks differential pressure after the fan opens for a period of time. Opens when alarm comes, closes when alarm goes | Stops the unit |