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Free HVAC chiller quarterly service procedure

Free chiller preventive maintenance checklist (printable PDF log). Suction and discharge pressures, superheat, compressor amps and cutouts. Download free.

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Updated 26 Oct 2026

HVAC Chiller Quarterly Service Procedure

Quarterly service - water-cooled and air-cooled chiller systems

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0 of 13 checks

Refrigerant System

1Check refrigerant charge (suction and discharge pressures)
2Inspect expansion valve operation (superheat reading)

Compressor

3Inspect compressor (running amps vs nameplate, vibration, oil level, oil sight glass)
4Check compressor oil heater operation

Condenser

5Clean condenser coils (air-cooled: compressed air / coil cleaner) or check condenser water quality (water-cooled: TDS, pH, biocide)

Evaporator

6Check evaporator approach temperature (leaving chilled water temp vs refrigerant temp)

Safety Controls

7Test high-pressure safety cutout
8Test low-pressure safety cutout
9Test oil pressure safety (if fitted)
10Test flow switch operation

Water Circuit

11Check chilled water flow rate and delta-T (supply vs return)

Electrical

12Inspect electrical connections and tighten contactors

Operating Data

13Log operating data (suction pressure, discharge pressure, subcooling, superheat, amps, chilled water temps)

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Jarrod Milford

Jarrod Milford

Co-Founder & Commercial Director

Updated 26 October 2026
Also see:Maintenance and work orders →Best CMMS software →MapTrack vs MaintainX →

Short answer

A chiller quarterly service checklist records a technician's three-monthly service of a water-cooled or air-cooled chiller: refrigerant pressures, compressor amps and oil, condenser and evaporator performance, safety cut-outs, chilled water flow and delta-T, and electrical connections. Quarterly is manufacturer and industry practice, not law. Regulation 213 requires maintenance following the manufacturer, and regulation 111 of the Ozone Protection Regulations requires a refrigerant handling licence.

Checked against AS/NZS 5149.4:2016 on by the MapTrack templates team. How we check templates

Key takeaways

  • The MapTrack HVAC chiller quarterly service procedure contains 13 checks across 8 sections. Sections covered: Refrigerant System, Compressor, Condenser, Evaporator, Safety Controls, Water Circuit, Electrical, Operating Data.
  • A quarterly chiller service measures and records refrigerant pressures, superheat, compressor amps, approach temperature and chilled water flow, then tests every safety cutout and the flow switch.
  • Compare each reading with the last quarter. Rising discharge pressure points to condenser fouling, rising amps to compressor wear and a widening approach to fouling or low charge.
  • Regulation 213 of the model WHS Regulations requires plant to be maintained, inspected and, if necessary, tested by a competent person, following the manufacturer's recommendations.
  • Connecting gauges means handling refrigerant, so in Australia a chiller charged with an HFC or other fluorocarbon needs a technician holding a refrigerant handling licence.
  • Keep servicing through winter, and book the service before summer at least four weeks ahead of peak cooling demand so repairs are finished in time.

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What is an HVAC chiller quarterly service procedure?

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.

Quarterly chiller servicing is an operational necessity, not an optional task. Under regulation 213 of the model WHS Regulations, the person with management or control of plant at a workplace must ensure its maintenance, inspection and, if necessary, testing is carried out by a competent person, following the recommendations of the manufacturer or, where there are none, of a competent person, and that it is inspected annually if neither is reasonably practicable. The refrigerant handling code of practice from the Australian Refrigeration Council says AS/NZS 5149.4 requires each refrigerating system to get preventive maintenance for leakage in line with its instruction manual. Where the manual is silent, the table of AS/NZS 5149.4 frequencies in the code gives a leak inspection after any repair or when leakage is suspected for self-contained and unit systems, and, for other systems, every 12 months above 3 kg of refrigerant, every 6 months above 30 kg and every 3 months above 300 kg. US Department of Energy guidance notes that scale and fouling on the heat transfer surfaces of a chiller reduce heat exchanger efficiency, and that on a centrifugal chiller, lowering the condenser water temperature by 2 to 3 degrees Fahrenheit (about 1.1 to 1.7 degrees Celsius) can raise system efficiency by as much as 2% to 3%. Under the Ozone Protection and Synthetic Greenhouse Gas Management Regulations 1995, anyone handling fluorocarbon refrigerants, including HFCs, must hold a refrigerant handling licence, which the Australian Refrigeration Council administers. Insurance assessors and building compliance auditors routinely request quarterly service records as evidence of ongoing plant maintenance. Skipping a single quarterly service breaks the trend data chain, making it impossible to detect gradual performance degradation such as rising discharge pressures or declining evaporator approach temperatures.

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Benefits of using this HVAC chiller quarterly service procedure

  • 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

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  • Upload a paper form (PDF, Word, Excel or a photo) and MapTrack's AI builds a digital version for you to check.
  • Raise a work order from a submitted form with an automation you set up.
  • Track service intervals by hours, kilometres or calendar date in one place.
  • Attach supplier invoices and parts receipts to each maintenance record.

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What to include in an HVAC chiller quarterly service procedure

This HVAC chiller quarterly service procedure covers 7 key 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.

How to use this HVAC chiller quarterly service procedure

  1. 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.: Check the BMS or local controller for any fault codes, alarms or abnormal operating trends since the last service. Record the chiller make, model, serial number, refrigerant type, nominal capacity and current running status on the service form.
  2. Start with the refrigerant system: connect gauges to the service ports, record suction and discharge pressures, and check the expansion valve superheat reading.: Connect calibrated gauges to the high-side and low-side service ports. Record suction pressure, discharge pressure and calculate superheat at the evaporator outlet. Compare readings to the manufacturer normal operating range for the current ambient and load conditions.
  3. 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.: Use a clamp meter to measure running amps on each phase and compare to the nameplate RLA. Check for phase imbalance exceeding 5 percent. Place a hand on the compressor housing to feel for unusual vibration. Verify oil level in the sight glass is within the normal band and confirm the crankcase oil heater is energised when the compressor is off.
  4. 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).: For air-cooled condensers, blow compressed air through the coil fins from inside out to remove dust and debris, or apply a non-acid coil cleaner and rinse. For water-cooled units, take a condenser water sample and test TDS, pH and biocide residual. Compare results to the water treatment provider specifications and adjust dosing if required.
  5. Check evaporator performance by measuring the approach temperature (leaving chilled water temp minus refrigerant temp).: Record the leaving chilled water temperature and the refrigerant suction temperature at the evaporator. The difference is the approach temperature. An increasing approach temperature compared to previous services indicates fouling or reduced refrigerant charge. Typical approach for a well-maintained chiller is 1.5 to 3 degrees Celsius.
  6. Test all safety controls: high-pressure cutout, low-pressure cutout, oil pressure safety (if fitted) and flow switch. Record trip and reset values.: Simulate each safety condition to confirm the cutout trips at the correct pressure and resets as expected. For the flow switch, interrupt water flow momentarily and verify the chiller shuts down. Record the trip and reset values for each device and compare to the manufacturer set points.
  7. Check the chilled water circuit: measure flow rate and delta-T (supply vs return temperature). Inspect electrical connections and tighten any loose contactors.: Measure chilled water supply and return temperatures with calibrated probes and calculate the delta-T. Compare the flow rate to design conditions. Inspect all electrical connections in the chiller control panel, tighten any loose contactors or terminal screws, and look for signs of arcing or heat discolouration.
  8. Log all operating data (suction pressure, discharge pressure, subcooling, superheat, amps, chilled water temperatures). Record any defects or recommendations in the notes section.: Enter all readings into the operating data table on the service form. Compare each value to the previous quarterly service to identify trends such as rising discharge pressure (indicating condenser fouling) or increasing amps (indicating compressor wear). Record any recommendations for corrective action.
  9. Set the next quarterly and annual service due dates. Sign off and update the asset's maintenance log.: Calculate the next quarterly and annual service due dates and enter them in your maintenance management system. Update the service sticker on the chiller. Obtain the technician and facility manager signatures to complete the service record.

In MapTrack, you can schedule and track maintenance digitally, by date or meter reading. Each submission is stored as a timestamped PDF against the asset record.

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How often should you complete this service procedure?

Quarterly chiller servicing should be performed every three months throughout the year, not just during the cooling season. Chillers that sit idle during winter can develop refrigerant leaks, oil migration and electrical faults that are only discovered when cooling demand returns. The quarterly service captures operating data trends that reveal gradual degradation, such as rising discharge pressures or increasing compressor amps. Manufacturer service schedules typically specify quarterly intervals as the baseline, with the annual service adding leak testing, oil analysis, coil cleaning and compliance certification.

Critical facilities such as hospitals, data centres and pharmaceutical plants may require monthly operating checks in addition to quarterly servicing. Seasonal considerations also matter: schedule the pre-summer quarterly service at least four weeks before peak cooling demand so any corrective work can be completed before the chiller is needed at full capacity. If operating data from the previous quarter shows discharge pressures trending upward or approach temperatures widening, bring the next quarterly service forward rather than waiting for the scheduled date. In MapTrack, you can schedule the quarterly service on each chiller, have the assigned technician emailed when it falls due within seven days, and raise the work order from a meter reading such as run hours.

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Frequently asked questions

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.

In Australia, yes, if the chiller uses a fluorocarbon refrigerant such as an HFC. Under the Ozone Protection and Synthetic Greenhouse Gas Management Regulations 1995, anyone handling fluorocarbon refrigerants must hold a refrigerant handling licence, and the Australian Refrigeration Council, which administers the licences, says anyone who installs, services or repairs refrigeration and air conditioning equipment must be a licensed technician. The quarterly service in this checklist connects gauges to the service ports, so have it done by a licensed technician. The Commonwealth regulations don't require this licence for natural refrigerants such as hydrocarbons, but some states and territories need their own authorisation or licence for that work, so check your local rules.

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.

AS/NZS 5149.4:2016 covers the operation, maintenance, repair and recovery of refrigerating systems and heat pumps; the Standards Australia store lists the older AS/NZS 1677.2 as superseded and shows the AS/NZS 5149 series in its place. Under the Ozone Protection and Synthetic Greenhouse Gas Management Regulations 1995, handling fluorocarbon refrigerants such as HFCs needs a refrigerant handling licence, administered by the Australian Refrigeration Council. Regulation 213 of the model WHS Regulations requires plant, including chillers, to be maintained, inspected and, if necessary, tested by a competent person, following the recommendations of the manufacturer or, where there are none, of a competent person. Documented quarterly service records demonstrate compliance during building compliance audits and insurance assessments.

Yes. The quarterly service is the core preventive maintenance routine for a chiller, and this checklist walks through it system by system: refrigerant charge, compressor condition, condenser and evaporator performance, safety control tests, water circuit checks and electrical connections. Run it every quarter and pair it with your annual major service so small drifts in readings are caught before they become failures.

The core readings are suction and discharge pressure to check refrigerant charge, superheat at the expansion valve, evaporator approach temperature, chilled water flow rate and delta-T, compressor running amps against nameplate, and oil level. Many technicians also log subcooling at the condenser to confirm charge. Record every reading in the operating data log so quarter-on-quarter drift is visible.

Yes. Download and use the HVAC chiller quarterly service checklist for free. Enter your email and tick the box agreeing to occasional updates from MapTrack, and the PDF downloads straight away. No MapTrack account is required. The checklist covers all standard quarterly service items including refrigerant system checks, compressor inspection, condenser cleaning, evaporator performance, safety control testing and operating data logging. If you want to record each chiller service against the asset and have the assigned technician emailed when the next quarterly service falls due within seven days, MapTrack can do that. Book a demo to see how.

Applicable regulatory standards

This template is a starting point. Check the current requirements that apply to your equipment, work and location. The template alone does not establish compliance.

  • Refrigerating systems and heat pumps - Safety and environmental requirements, Part 4: Operation, maintenance, repair and recovery (ISO 5149-4:2014, MOD)

    Edition: AS/NZS 5149.4:2016

    Maintenance of refrigerating systems and heat pumps, and the documentation kept for each system.

    • 5.2: Maintenance of refrigerating systems and heat pumps
    • 4.3: Documentation to be kept for the refrigerating system

    Standards Australia and Standards New ZealandSold by the publisher

  • Model Work Health and Safety Regulations

    Edition: Model WHS Regulations as at 5 December 2025 (cited within as the Work Health and Safety Regulations 2011)

    Maintenance and inspection by a competent person following the manufacturer's recommendations, annual only if neither is practicable.

    • reg 213: Plant must be maintained, inspected and, if necessary, tested by a competent person, following manufacturer or competent person recommendations; annual inspection applies only if neither is practicable.

    Safe Work Australia (drafted by the Parliamentary Counsel's Committee)

  • Ozone Protection and Synthetic Greenhouse Gas Management Regulations 1995

    Edition: Compilation F2026C00546, effective 2026-07-01, registered 2026-07-02; current as at 2026-10-26 (Federal Register of Legislation)

    Work where fluorocarbon refrigerant may be emitted needs a refrigerant handling licence, administered by ARCtick.

    • reg 111: Work on refrigeration and air conditioning equipment that risks refrigerant emissions needs a refrigerant handling licence, unless a listed supervision, exemption or AMSA alternative applies.
    • Subdiv 6A.2.2: Refrigerant handling licences: grant, qualified persons, restricted and trainee licences.

    Commonwealth of Australia (Federal Register of Legislation)

Each source was read at its publisher and the page checked on 26 October 2026. The publisher's current text is the authority.

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<div style="max-width:480px;font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;border:1px solid #E5E7EB;border-radius:12px;padding:20px;background:#ffffff;">
  <p style="font-size:12px;font-weight:700;letter-spacing:0.05em;text-transform:uppercase;color:#071D49;margin:0;">Free template</p>
  <p style="font-size:18px;font-weight:700;color:#071D49;margin:6px 0 0;">HVAC chiller quarterly service procedure</p>
  <ul style="margin:12px 0 0;padding-left:18px;color:#374151;font-size:14px;line-height:1.6;">
    <li style="margin:4px 0;">Refrigerant system: check refrigerant charge (suction and discharge pressures), inspect expansion valve operation (superheat reading).</li>
    <li style="margin:4px 0;">Compressor: inspect running amps vs nameplate, vibration, oil level and oil sight glass, check oil heater operation.</li>
    <li style="margin:4px 0;">Condenser: clean condenser coils (air-cooled) or check condenser water quality (water-cooled: TDS, pH, biocide).</li>
    <li style="margin:4px 0;">Evaporator: check approach temperature (leaving chilled water temp vs refrigerant temp).</li>
    <li style="margin:4px 0;">Safety controls: test high-pressure cutout, low-pressure cutout, oil pressure safety and flow switch.</li>
    <li style="margin:4px 0;">Water circuit: check chilled water flow rate and delta-T (supply vs return).</li>
  </ul>
  <p style="font-size:13px;color:#6B7280;margin:14px 0 0;padding-top:12px;border-top:1px solid #E5E7EB;">Free <a href="https://www.maptrack.com/templates/hvac-chiller-quarterly-service" style="color:#071D49;font-weight:600;text-decoration:none;">HVAC chiller quarterly service procedure</a> by MapTrack</p>
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The MapTrack HVAC chiller quarterly service procedure contains 13 checks across 8 sections.

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