ACCA Announces 60-day Review of On Board Diagnostic Standard

March 19, 2018

The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) announces the second public review of BSR/ACCA 15 OBD - 201x (On Board Diagnostic Codes for HVACR Equipment). The 60-day public review period begins March 16, 2018 and closes on May 15, 2018.

The On Board Diagnostic Standard details the naming schema for designating fault and performance codes for heating, ventilation, air-conditioning and refrigeration (HVACR) equipment. As defined and used in this proposed Standard, the naming schema standardizes fault and performance codes based on Location (with a Modifier), Mode of Operation, Process, Operating Parameter, and Performance Descriptor.

The schema accommodates operating faults and/or performance characteristics that are commonly identified by today’s equipment diagnostic capabilities, and that may need to be identified as enhanced sensors and controls are applied to future HVACR offerings. Additionally, this Standard provides for the incorporation of proprietary, manufacturer-specific information that individual manufacturers may choose to make available to field practitioners.

A copy of the proposed Standard can be downloaded for free at Comments on this public review must be submitted by May 15, 2018 (5:00 P.M. EDT) using the ACCA Public Response Form available at

For more information please contact Todd Washam, ACCA director of industry and external relations, at or 703-824-8864.


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ACCA is a non-profit association serving more than 60,000 professionals and 4,000 businesses in the indoor environment and energy services community. Our member firms are the nation's most professional contracting businesses, serving residential and commercial customers in every state. With roots stretching back a century, ACCA was incorporated in its present form nearly 50 years ago. Today, ACCA sets the standards for quality comfort systems, provides leading-edge education for contractors and their employees, and fights for the interests of professional contractors throughout the nation. Learn more about ACCA here.