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Air-cooled condensing unit maintenance checklists

Air-cooled condensing unit maintenance checklists for the quarterly and annual rounds: 2 free lists, 29 items and 28 photo requirements, each item naming what to look for and the photo evidence it needs.

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The air-cooled condensing unit rounds

Air-cooled condensing unit QuarterlyAir-cooled condensing unit quarterly maintenance checklistCoil cleanliness, fan operation and clearances checked outside on the quarterly round14 items14 photosAir-cooled condensing unit AnnualAir-cooled condensing unit annual maintenance checklistCoil deep-cleaned, refrigerant side and charge checked and electrical serviced on the annual15 items14 photos

Where each walk sits in the schedule

  1. 01quarterly

    Air-cooled condensing unit quarterly maintenance checklist

    Every quarter through the cooling season, before the hottest stretch so a dirty coil is caught before it drives the head pressure up.

    Run by: The refrigeration or mechanical tech on the quarterly round at the pad or roof curb.

  2. 02annual

    Air-cooled condensing unit annual maintenance checklist

    Once a year at cooling-season startup, so the coil clean, the charge check and the electrical service all happen before the unit is leaned on.

    Run by: The licensed refrigeration tech on the annual, the only one touching the refrigerant circuit.

What most often fails on an air-cooled condensing unit

  • Coil face 'looks fine' from the front while the back rows are packed with cottonwood or grass clippings and the unit is fighting head pressure all afternoon.
  • Landscaping, a new fence or stored pallets crowded up against the unit, choking the airflow the coil needs to reject heat.
  • A condenser fan cycling on a bad motor or seized bearing, running one fan down all season while the other carries the load.
  • Charge judged by a single gauge glance instead of a proper subcooling or superheat reading, so a slow leak or an overcharge rides for another season.
  • Contactor points burned and pitted left in service, so the compressor eventually fails to pull in on a hot-day start and the call comes in as a no-cool.
  • Coil pressure-washed hard enough to lay the fins flat, trading a dirty coil for an airflow-starved one.

Common questions

4 answers

Which air-cooled condensing unit maintenance rounds do these checklists cover?
Air-cooled condensing unit quarterly maintenance checklist (quarterly): Every quarter through the cooling season, before the hottest stretch so a dirty coil is caught before it drives the head pressure up. Air-cooled condensing unit annual maintenance checklist (annual): Once a year at cooling-season startup, so the coil clean, the charge check and the electrical service all happen before the unit is leaned on.
Who runs the air-cooled condensing unit maintenance round?
The refrigeration or mechanical tech on the quarterly round at the pad or roof curb. The licensed refrigeration tech on the annual, the only one touching the refrigerant circuit.
What most often fails on an air-cooled condensing unit?
Coil face 'looks fine' from the front while the back rows are packed with cottonwood or grass clippings and the unit is fighting head pressure all afternoon. Landscaping, a new fence or stored pallets crowded up against the unit, choking the airflow the coil needs to reject heat. A condenser fan cycling on a bad motor or seized bearing, running one fan down all season while the other carries the load. Charge judged by a single gauge glance instead of a proper subcooling or superheat reading, so a slow leak or an overcharge rides for another season.
Can I run these checklists in RTI?
Yes. Start a free RTI workspace and load any of the 2 lists (29 items in total). The Photo Gate holds the submit button until every mandatory item is answered and its photos are attached, and approved inspections roll into a branded turnover package with a tamper evident audit trail.

Run these lists with the Photo Gate.

Tag one area, scan it, and the submit stays locked until the photos exist.

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