Joint Appendix JA17 provides the technical specifications for fault indication display devices (FIDs) that provide visual and/or audible indications that heat/energy recover ventilation systems (HRV/ERV) systems, and balanced or supply-only ventilation systems that require an FID according to Section 150.0(o)Civa1 and Section 160.2(b)2Axia1, maintain their rated airflow and fan efficacy for the life of the equipment.

Fault indication devices shall respond to the following categories:

1. Filter check or maintenance, either based on performance or a predetermined schedule.
2. Low supply airflow.
3. Low exhaust airflow (balanced systems only).
4. Sensor failure for sensors that assist in monitoring or controlling airflow regulation, frost control, supply air tempering, and economizing.

Fault indication shall use one or more of the following means:

1. A visual display that is readily accessible to occupants of the dwelling unit.
2. An electronic application.
3. An audible alarm accompanied by a visual display.

Instrumentation shall measure and report the following:

1. Airflow.
2. Fan power.

To qualify, manufacturers shall certify to the CEC that the FID systems meet the requirements of JA17.2 – JA17.4.

A listing of certified products is provided at the following location: https://www.energy.ca.gov/media/7020