Who should run this inspection?

The VRF service tech on the annual, with sections isolated as needed and the manufacturer's service tool on the system.

When in the schedule should this walk happen?

Once a year, the pass that reaches the fouling on the coils and blower wheels, opens the branch controllers, walks the full refrigerant-line insulation and functionally tests the leak detection the quarterly only eyeballs.

Why do these items ask for a photo?

8 of the 15 items call for photo evidence, 10 photos in all. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.

What most often fails a vrf system annual inspection?

Outdoor coils rinsed from one face while the packed dirt in the multi-slab coil stays, so head pressure climbs and the system derates on the hottest days. Refrigerant-line insulation split or missing at a long horizontal run or a wall penetration, left because tracing the whole route is tedious, so the exposed line sweats and drips inside the ceiling. Leak-detection sensors assumed good on their power light and never bump-tested or calibrated, so a sensor that has drifted or failed gives no warning in a room that needs one.

Can I use this checklist in RTI?

Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper evident audit trail.

Free checklist

VRF system annual maintenance checklist

The annual VRF system service is the deep pass: the measurements, cleanings and tests a quarterly round doesn't reach. This checklist keeps the full service on record with the photos that make it defensible later. Work is commonly verified against IMC, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.

Start free with this checklist Download as PDF

The checklist

Every item, and the photo evidence it needs

The photo count on each row is what RTI would require before the item can be submitted. Work the list here and watch the gate hold, or load it into RTI and let it enforce the real thing.

Outdoor and indoor cleaning

Outage agreed and occupants told of cleaning and alarm tests
Outage set with the owner, occupants under each head told how long it is off, rooms with leak detection warned before its alarm test, and floors below covered.
No photo
Every circuit feeding the section being opened locked and tagged
Outdoor modules, indoor unit circuits and any branch box feed locked out, zero voltage proven. For tests: panels on, people clear, locks off by whoever hung them, re-locked before hands go back in.
Outdoor coils deep-cleaned and fans serviced
All coil slabs cleaned through the full fin depth, fins combed, fan motors and blades checked, amp draw within nameplate, drainage confirmed after rinse.
Indoor head coils, blower wheels and drains cleaned
Heads opened, coils and blower wheels cleaned of biofilm and dust to restore airflow, pans scrubbed and re-pitched, drain lines and condensate pumps flushed and proven flowing.

Branch controllers and refrigerant piping

Branch controller internals and condensate serviced
Branch controller boxes opened, valves and connections checked for oil residue signaling a leak, condensate pan and drain within the box cleaned and re-pitched, insulation resealed.
No photo
Refrigerant-line insulation inspected end to end
Full insulated line route walked from the outdoor unit through the branch controllers to the heads, gaps, splits and UV or physical damage resealed, no bare line sweating at penetrations or long runs.

Electrical and communication

Power terminations torque-verified at the outdoor unit and boxes
Lugs at each outdoor module, its disconnect and any branch box terminal block torque-verified to the manufacturer's value, re-torqued only where found loose, no heat marks.
Transmission wiring and shield checked at each terminal block
Communication wiring tight at the outdoor unit, any branch box and a sample of heads, shield terminated as the manufacturer's wiring diagram shows, no chafe or taped splice.

Detection, charge and controls

Outdoor power restored and crankcase warm-up held before start
Panels closed, tools and people clear, locks removed by whoever hung them, outdoor power held on for the manufacturer's crankcase warm-up before a compressor is commanded.
No photo
Refrigerant leak detection functionally tested where required
Where required, each leak-detection sensor bump-tested or calibrated per the manufacturer's instructions, alarm and any interlocked ventilation or shutdown proven, sensor placement still correct for the room.
No photo
System operation, charge awareness and addressing verified
System driven in heating and cooling under load, operating data read on the service tool and compared to the manufacturer's figures with a shortfall treated as a leak to find, every head confirmed addressed and communicating, firmware and network as intended.
Charge label on the outdoor unit matched to the system record
Factory and field-added charge written on the outdoor unit label read and matched to the service record, any undocumented change flagged to the owner.
Recovery, repair or weigh-in by a certified refrigerant technician
Leak repair, recovery, evacuation or refrigerant weighed in handled by a certified refrigerant technician, the amount added or removed entered on the label and system record.
No photo

Return to service

Heads back on the owner's schedules with no fault standing
Grilles and panels latched, each head on its normal schedule and mode at the controls, and no test override or active error left behind.
No photo
Annual service record filed by system and head address
Operating data, cleaning notes, leak-detection results, charge changes and deferred repairs recorded by system and head address as next year's baseline.
No photo

What usually sends this back

The failures are almost always the evidence, not the work

Outdoor coils rinsed from one face while the packed dirt in the multi-slab coil stays, so head pressure climbs and the system derates on the hottest days.
Refrigerant-line insulation split or missing at a long horizontal run or a wall penetration, left because tracing the whole route is tedious, so the exposed line sweats and drips inside the ceiling.
Leak-detection sensors assumed good on their power light and never bump-tested or calibrated, so a sensor that has drifted or failed gives no warning in a room that needs one.

Verified against

IMC (mechanical code)

Common questions

6 answers

What does this vrf system annual checklist cover?: 15 items across 5 sections, covering outdoor and indoor cleaning, branch controllers and refrigerant piping, electrical and communication, detection, charge and controls, and more. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
Who should run this inspection?: The VRF service tech on the annual, with sections isolated as needed and the manufacturer's service tool on the system.
When in the schedule should this walk happen?: Once a year, the pass that reaches the fouling on the coils and blower wheels, opens the branch controllers, walks the full refrigerant-line insulation and functionally tests the leak detection the quarterly only eyeballs.
Why do these items ask for a photo?: 8 of the 15 items call for photo evidence, 10 photos in all. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
What most often fails a vrf system annual inspection?: Outdoor coils rinsed from one face while the packed dirt in the multi-slab coil stays, so head pressure climbs and the system derates on the hottest days. Refrigerant-line insulation split or missing at a long horizontal run or a wall penetration, left because tracing the whole route is tedious, so the exposed line sweats and drips inside the ceiling. Leak-detection sensors assumed good on their power light and never bump-tested or calibrated, so a sensor that has drifted or failed gives no warning in a room that needs one.
Can I use this checklist in RTI?: Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper evident audit trail.

Related checklists

VRF system QuarterlyVRF system quarterly maintenance checklistOutdoor unit, branch controllers and indoor heads walked with a controls and network check on the quarterly round15 items10 photos

Run it with the Photo Gate

A checklist nobody can submit half-finished

Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 10 required photos exist. Approved walks roll into a branded turnover package with a tamper evident record behind every line.