Free HVAC chiller quarterly service checklist
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A step-by-step quarterly service procedure for water-cooled and air-cooled chiller systems. Covers refrigerant charge check, compressor inspection, condenser coil cleaning or water quality testing, evaporator approach temperature, safety control testing, chilled water flow and delta-T, electrical connections and operating data logging. Includes fluid specifications, parts list and technician sign-off. This page explains what the service involves, how to perform it, and offers a free PDF-ready form you can download straight away.
Last updated: 2026-03-26 · MapTrack
Commercial Director
How to use: Fill equipment details and chiller information, then work through each service action. Tick Done as each task is completed. Record pressure readings, temperatures and notes. Set the next service due date and sign off.
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- ✓ Includes fluid specs, parts list and sign-off
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See the first part of the service procedure below. Enter your email above to download the full HVAC chiller quarterly service procedure (PDF-ready).
What is an HVAC chiller quarterly service?
A quarterly chiller service is a scheduled preventive maintenance procedure performed every three months on water-cooled and air-cooled chiller systems. It covers refrigerant system checks (suction and discharge pressures), compressor health (running amps, vibration, oil level), condenser maintenance (coil cleaning for air-cooled units or water quality testing for water-cooled units), evaporator performance (approach temperature), safety control testing (high-pressure cutout, low-pressure cutout, oil pressure safety, flow switch), chilled water circuit checks (flow rate and delta-T), electrical connection inspection and comprehensive operating data logging. Unlike a daily walk-around (which confirms the chiller is running), the quarterly service involves detailed measurement, testing and recording of performance data to identify degradation before it causes failures.
Benefits of scheduled chiller servicing
- Reduced breakdowns: regular refrigerant, compressor and condenser checks prevent unexpected failures that leave buildings without cooling.
- Energy efficiency: dirty condensers, low refrigerant charge and fouled evaporators force the compressor to work harder, increasing energy consumption. Quarterly servicing keeps the chiller operating at design efficiency.
- Extended equipment life: monitoring compressor oil condition, operating pressures and electrical connections prevents premature wear on the most expensive component in the HVAC system.
- Compliance: documented service records demonstrate that refrigerant-containing equipment is maintained to environmental and safety standards, supporting regulatory and insurance obligations.
- Tenant comfort: proactive servicing prevents temperature control issues that affect building occupants and tenant satisfaction.
- Cost control: a quarterly service costs a fraction of an emergency chiller repair or temporary cooling hire. Catching issues early prevents cascading damage.
Benefits of digitising forms in MapTrack
When you move from paper or static PDFs to digital forms in MapTrack, you get:
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- Build conditional logic (show or hide questions based on answers).
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Book a demo to see digital service procedures and calendar-based scheduling in MapTrack.
Service actions included in the quarterly procedure
This service procedure covers 13 service actions across 7 system areas:
- Refrigerant system: check refrigerant charge (suction and discharge pressures), inspect expansion valve operation (superheat reading).
- Compressor: inspect running amps vs nameplate, vibration, oil level and oil sight glass, check oil heater operation.
- Condenser: clean condenser coils (air-cooled) or check condenser water quality (water-cooled: TDS, pH, biocide).
- Evaporator: check approach temperature (leaving chilled water temp vs refrigerant temp).
- Safety controls: test high-pressure cutout, low-pressure cutout, oil pressure safety and flow switch.
- Water circuit: check chilled water flow rate and delta-T (supply vs return).
- Electrical and data: inspect electrical connections, tighten contactors, log all operating data.
Fluid specifications
General fluid specifications for HVAC chiller systems. Always refer to the chiller manufacturer's service manual for your specific make and model.
| System | Type / Grade | Notes |
|---|---|---|
| Refrigerant | R-134a, R-410A, R-407C or as specified | Do not top up without leak test |
| Compressor oil | POE or mineral per manufacturer | Check sight glass level |
| Condenser water treatment | Biocide, anti-scale, corrosion inhibitor | Water-cooled systems only |
Refrigerant handling requires an appropriate licence. Always refer to the manufacturer's service manual for your specific make and model.
Parts and consumables
Have the following parts and consumables ready before starting the quarterly chiller service:
- Condenser coil cleaner (air-cooled systems)
- Water treatment chemicals (water-cooled systems)
- Replacement contactors (if pitted)
- Rags, PPE, pressure gauges and thermometers
Check the manufacturer's parts manual for specific part numbers before ordering.
How to perform an HVAC chiller quarterly service
- Review the chiller's operating log and any outstanding fault reports. Record the equipment details and current operating status at the top of the service procedure form.
- Start with the refrigerant system: connect gauges to the service ports, record suction and discharge pressures, and check the expansion valve superheat reading.
- Inspect the compressor: record running amps and compare to nameplate, check for abnormal vibration, verify oil level in the sight glass and confirm the oil heater is operating.
- Service the condenser: for air-cooled units, clean coils with compressed air or coil cleaner. For water-cooled units, check condenser water quality (TDS, pH, biocide levels).
- Check evaporator performance by measuring the approach temperature (leaving chilled water temp minus refrigerant temp).
- Test all safety controls: high-pressure cutout, low-pressure cutout, oil pressure safety (if fitted) and flow switch. Record trip and reset values.
- Check the chilled water circuit: measure flow rate and delta-T (supply vs return temperature). Inspect electrical connections and tighten any loose contactors.
- Log all operating data (suction pressure, discharge pressure, subcooling, superheat, amps, chilled water temperatures). Record any defects or recommendations in the notes section.
- Set the next quarterly and annual service due dates. Sign off and update the asset's maintenance log.
In MapTrack, you can schedule services by calendar date, get automatic reminders, complete service procedures on mobile and link every record to the asset. Book a demo to see how.
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Back to download formChiller service interval hierarchy
HVAC chiller maintenance follows a tiered schedule where each level includes all tasks from the level below. This is called carry-forward or cumulative servicing.
Quarterly service (you are here)
Refrigerant check, compressor inspection, condenser cleaning, safety control testing, operating data. Estimated 2-3 hours.
All quarterly tasks plus refrigerant leak test, compressor oil analysis, tube testing, sensor calibration, VFD inspection, insulation resistance test and performance test. Estimated 4-8 hours.
In MapTrack, you can configure service schedules by calendar date and receive automatic alerts when each interval is due.
Frequently asked questions
- What is included in an HVAC chiller quarterly service?
- A quarterly chiller service covers checking refrigerant charge (suction and discharge pressures), inspecting the compressor (running amps, vibration, oil level and oil sight glass), cleaning condenser coils or checking condenser water quality, measuring evaporator approach temperature, testing safety controls (high-pressure cutout, low-pressure cutout, oil pressure safety, flow switch), checking chilled water flow rate and delta-T, inspecting electrical connections and contactors, and logging all operating data. It takes approximately 2 to 3 hours.
- Do you need a refrigerant licence to perform chiller maintenance?
- In Australia, any work involving the handling, recovery or charging of refrigerant requires an appropriate refrigerant handling licence (ARCTick). A quarterly service that only involves reading pressures and visual inspections can be performed by a qualified HVAC technician, but any refrigerant top-up or recovery requires a licensed refrigerant handler. Always check your state or territory requirements.
- What is the difference between a quarterly and annual chiller service?
- A quarterly service covers routine operating checks, safety control testing, condenser cleaning, and performance data logging. An annual service includes all quarterly tasks plus a full refrigerant leak test, compressor oil analysis, eddy current testing on heat exchanger tubes (water-cooled), sensor and flow meter calibration, VFD inspection, insulation resistance testing, full performance test (COP/EER) and refrigerant register updates.
- Is the template free to use without MapTrack?
- Yes. Download and use the HVAC chiller quarterly service procedure for free. Open the file and use your browser's Print, then Save as PDF. No MapTrack account required. If you later want digital service procedures linked to each asset with scheduling, compliance tracking and alerts, we would be happy to show you MapTrack.
Need digital service procedures for your facilities?
Register every chiller, boiler and critical asset in MapTrack. Set up quarterly and annual service schedules, complete procedures on mobile, track parts and costs, and get automatic alerts when the next service is due.