{"id":"ddc-field-controller","version":"0.3.0","classification":{"uniformat":"D3060"},"names":["Unitary or field DDC controller"],"aliases":["DDC controller","field controller","unitary controller"],"pm_tasks":[{"task":"Check and tighten wiring; check high-voltage barriers are in place","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":119,"checklist":"CTRL-DDC-06-01Y Controller"},{"task":"Power down, blow out with dry air and vacuum the panel","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":119,"checklist":"CTRL-DDC-06-01Y Controller"},{"task":"Check incoming power and fuses for heating","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":119,"checklist":"CTRL-DDC-06-01Y Controller"},{"task":"Check analog outputs across their full range","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":120,"checklist":"CTRL-DDC-06-01Y Controller"},{"task":"Check binary inputs and outputs and analog inputs respond correctly","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":120,"checklist":"CTRL-DDC-06-01Y Controller"},{"task":"Check point labels are correct and plugs fully seated","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":120,"checklist":"CTRL-DDC-06-01Y Controller"},{"task":"Replace the panel backup battery","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":118,"checklist":"CTRL-DDC-05-01Y Field Panel"},{"task":"Verify the controller is on the right network with the right address","frequency":"P1Y","reference":"Public Buildings Service Preventive Maintenance Guide (Public Buildings Maintenance Standards)","url":"https://web.archive.org/web/20231003141600/https://origin-www.gsa.gov/system/files/GSA%20PBS%20Preventive%20Maintenance%20Guide%202022-01302023_0.pdf","page":120,"checklist":"CTRL-DDC-06-01Y Controller"}],"open_questions":["No service life yet: no published source that meets the sourcing policy states one. The maintenance tasks are sourced.","Written for GSA contracted O&M in US federal buildings; job plans are generic and defer to manufacturer instructions, and the fire extinguisher plans only point to NFPA 10."],"contributors":["unfinished.one editors"],"last_reviewed":"2026-10-22","canonical_url":"https://unfinished.one/c/ddc-field-controller","versioned_url":"https://unfinished.one/c/ddc-field-controller/v/0.3.0","licence":"CC-BY-4.0","citation":"unfinished.one (2026). Unitary or field DDC controller, v0.3.0. https://unfinished.one/c/ddc-field-controller/v/0.3.0"}