ACCA Announces 45-day Public Review Period for On Board Diagnostic Standard

October 27, 2017

Arlington, VA  – The Air Conditioning Contractors of America Educational Institute (ACCA-EI) Standards Task Team (STT) announces the first public review of BSR/ACCA 15 OBD - 201x (On Board Diagnostic Codes for HVACR Equipment). The 45-day public review period started on October 27, 2017 and will close on December 11, 2017.

The On Board Diagnostic Standard details the nomenclature naming schema for defining fault and/or performance codes and terminology for heating, ventilation, air-conditioning and refrigeration (HVACR) equipment. The Standard does not detail possible causes or diagnostic information associated with fault codes or performance data, which are provided in equipment and component product documentation.

As defined and used in this proposed Standard, the nomenclature naming standardizes codes based on Component (with a Modifier), Mode of Operation, Process, Attribute Type, 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 in the future as enhanced sensors and controls are applied to HVACR offerings. Additionally, this Standard provides for the incorporation of optional 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 December 11, 2017 (5:00 P.M. EDT) using the ACCA Public Response Form available at

Download a Word copy
Download a PDF copy

For more information, please contact ACCA’s Director of Industry and External Relations, Todd Washam, 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.