The fault indication comes through
the network sensor bus when you use a network sensor in the zone. The LCD indicates the
code number for all the required state of California Title 24 economizer fault
conditions.
| Display text | California Title 24 economizer fault condition | Possible problem |
|---|---|---|
| E00 | Air temperature sensor failure/fault | Problem with one of the air temperature sensors. Check outdoor air, return air, or supply air sensors. |
| E01 | Not economizing when it should | The economizer does not use outdoor air when it should. |
| E02 | Economizing when it should not | The economizer is allowing outdoor air inside when the conditions are not suitable for economizer operation. |
| E03 | Damper not modulating | The economizer damper is not able to modulate properly. Check damper, linkage to actuator, or the actuator. |
| E04 | Excess outdoor air | The economizer is allowing excess outdoor air inside. |