Free chiller maintenance checklist
Free chiller maintenance checklist (PDF-ready). Covers refrigerant, condenser, evaporator, compressor, controls and water treatment. Download free.
Updated 3 May 2026
Chiller Unit Maintenance Checklist
Scheduled maintenance for water-cooled and air-cooled chiller systems
Compressor
Condenser
Evaporator
Controls & Sensors
Refrigerant & Oil
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Key takeaways
- The MapTrack chiller maintenance checklist contains 24 checks across 5 sections. Sections covered: Compressor, Condenser, Evaporator, Controls & Sensors, Refrigerant & Oil.
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What is a chiller maintenance checklist?
A chiller maintenance checklist is a structured document used by HVAC technicians, facility managers and building maintenance teams to systematically inspect and service water-cooled and air-cooled chiller systems at scheduled intervals. It covers the refrigeration circuit (compressor operation, refrigerant charge and pressures, oil level and condition), heat exchangers (condenser and evaporator tube condition, approach temperatures, fouling), water circuits (chilled water and condenser water flow rates, temperatures, water treatment and quality), electrical systems (motor current, starter and contactor condition, control panel), safety devices (high and low pressure cut-outs, flow switches, relief valves) and general condition (vibration, noise, leaks, insulation). The checklist applies to centrifugal, screw, scroll and reciprocating chillers used in commercial buildings, hospitals, data centres, manufacturing and process cooling applications.
Chillers are the single largest energy consumers in most commercial and industrial facilities, often accounting for 30 to 50 per cent of total electricity costs. A poorly maintained chiller operating with fouled condenser tubes, incorrect refrigerant charge or degraded oil can consume 10 to 30 per cent more energy than a well-maintained unit, while delivering reduced cooling capacity. Beyond energy waste, refrigerant leaks contribute to environmental harm, and safety device failures can lead to high-pressure incidents. A documented maintenance programme ensures that every inspection covers the critical parameters, builds a trend history for predictive analysis and meets regulatory obligations. When managed through MapTrack, chiller maintenance checklists are linked to the asset record, providing a complete service history for compliance audits, warranty support and lifecycle cost analysis.
Learn more about maintenance and work orders in MapTrack.
Benefits of using this chiller maintenance checklist
- Energy efficiency: maintaining clean heat exchangers, correct refrigerant charge, proper oil condition and optimal control settings keeps the chiller operating at peak efficiency, directly reducing electricity costs.
- Extended equipment life: regular oil analysis, vibration monitoring, tube cleaning and bearing inspection prevent accelerated wear on the compressor, motor and heat exchanger components, extending the useful life of the chiller.
- Refrigerant compliance: documented leak checks and charge records support compliance with the Ozone Protection and Synthetic Greenhouse Gas Management Act 1989 and its regulations, which require leak detection, record-keeping and licensed technician handling.
- Reduced downtime: identifying abnormal pressures, temperatures, vibration or electrical faults during scheduled checks prevents emergency failures during peak cooling demand.
- Water quality protection: monitoring chilled water and condenser water treatment, pH, conductivity and inhibitor levels prevents biological growth, scale and corrosion that degrade chiller performance and damage tubes.
- Safety assurance: testing high and low pressure cut-outs, flow switches and relief valves at each inspection confirms that safety devices will protect the chiller from overpressure and loss-of-flow conditions.
Benefits of digitising forms in MapTrack
When you digitise chiller checklists in MapTrack, you get:
- Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
- Automatically get alerts when faults are identified.
- Link every form digitally as a PDF to the relevant asset, location or person.
- Receive a digital PDF copy with every submission to your email.
- Ability to share forms digitally.
- Build conditional logic (show or hide questions based on answers).
- Take pictures or attach photos. Not possible with a paper-based form.
- Electronic signatures.
- Edit forms later without reprinting.
- Restrict permissions (who can view, complete or approve).
- Build forms with AI (describe what you need and MapTrack suggests the form).
- Trigger work orders automatically when a fault is logged during an inspection.
- 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 a chiller maintenance checklist
This chiller maintenance checklist covers 10 key areas:
- Chiller identification: asset ID, make, model, serial number, chiller type (centrifugal, screw, scroll, reciprocating), refrigerant type, location, current operating hours, date and technician name.
- Compressor: record suction and discharge pressures and temperatures, check oil level and condition on sight glass, listen for abnormal noise or vibration, record motor current (amps) and compare to rated load amps (RLA).
- Refrigerant circuit: check refrigerant charge level by monitoring superheat and subcooling, inspect for refrigerant leaks using an electronic leak detector or soap solution, record high-side and low-side pressures.
- Condenser (air-cooled): inspect coil fins for dirt, damage and blockage, check condenser fan operation and motor current, clean coils if the approach temperature exceeds the manufacturer baseline.
- Condenser (water-cooled): record entering and leaving condenser water temperatures, calculate approach temperature, inspect tube sheets for fouling and corrosion, schedule tube cleaning if approach temperature has increased.
- Evaporator: record entering and leaving chilled water temperatures, calculate approach temperature, inspect for frost or ice formation indicating low flow or low charge, check insulation condition.
- Water circuits: verify chilled water and condenser water flow rates, check pump operation, inspect strainers and filters, record water treatment chemical levels (pH, conductivity, inhibitor concentration, microbiological count).
- Electrical system: record motor voltage and current on all phases, check for phase imbalance, inspect starter, contactors and overloads, check control panel for error codes or alarms, test the emergency stop.
- Safety devices: test high-pressure and low-pressure cut-outs, verify flow switch operation on chilled water and condenser water circuits, check relief valve condition and tag date.
- General condition: inspect the chiller for oil leaks, refrigerant leaks, water leaks, abnormal vibration, insulation damage, corrosion and general cleanliness, note any items requiring corrective action.
How to use this chiller maintenance checklist
- Record the chiller identification details, current operating hours and operating conditions before starting the inspection.: Capture the asset ID, make, model, serial number, refrigerant type, location and current operating hours. Note the current ambient temperature, building load conditions and any recent operational issues reported by the building management system or operators. Review the previous maintenance report for outstanding actions.
- With the chiller running under normal load, record all operating parameters: pressures, temperatures, currents and flow rates.: Record suction and discharge pressures and temperatures, calculate superheat and subcooling, and compare to the manufacturer design values. Record entering and leaving chilled water temperatures and calculate the evaporator approach temperature. Record condenser water or ambient air temperatures and calculate the condenser approach temperature. Record motor voltage and current on all phases and check for imbalance exceeding 2 per cent. Record chilled water and condenser water flow rates.
- Inspect the compressor, oil system and refrigerant circuit for leaks, abnormal noise, vibration and oil condition.: Listen to the compressor for unusual noise, knocking or surging (centrifugal chillers). Check vibration levels against the baseline. Inspect the oil level on the sight glass and note the oil colour. Dark or cloudy oil indicates moisture or acid contamination and should be sampled for laboratory analysis. Use an electronic leak detector to check all refrigerant fittings, valve stems, shaft seals and brazed joints for leaks.
- Inspect the condenser and evaporator heat exchangers, water circuits and water treatment.: For air-cooled condensers, inspect coil fins for dirt, debris and physical damage. Clean coils with water or approved coil cleaner if approach temperature has increased beyond the manufacturer baseline. For water-cooled condensers, compare the current approach temperature to the commissioning baseline. An increase of more than 1 degree Celsius indicates tube fouling requiring chemical or mechanical cleaning. Check evaporator insulation for damage or condensation. Verify water treatment chemical levels and record pH, conductivity, inhibitor concentration and microbiological test results.
- Test safety devices, inspect electrical components and check the control panel for error codes or alarms.: Test the high-pressure cut-out by verifying its set point against the chiller nameplate or manufacturer specification. Test the low-pressure cut-out similarly. Verify chilled water and condenser water flow switch operation by momentarily reducing flow (if safe to do so). Inspect the starter, contactors and overload settings. Check the control panel for active or historical error codes and alarms. Test the emergency stop button.
- Record all findings, defects and corrective actions on the checklist. Compare operating parameters to previous records to identify trends. Set the next maintenance date and sign off.: Complete each checklist item with the recorded value or a Pass/Fail result. Compare current approach temperatures, pressures, currents and oil condition to the previous three inspections to identify degradation trends. Record all defects with descriptions and corrective actions. Raise work orders in MapTrack for items requiring follow-up. Calculate the next service due date and update the maintenance schedule. Sign and date the completed checklist.
In MapTrack, you can schedule and track maintenance digitally. Each submission is stored as a timestamped PDF against the asset record.
Get the free templateEnter your email above to download the full chiller maintenance checklist as a PDF.Back to download formHow often should you complete this checklist?
Chiller maintenance frequency depends on the chiller type, age, criticality and operating hours. Most manufacturers recommend monthly operating parameter checks (pressures, temperatures, currents, oil level) and quarterly comprehensive inspections covering all items on this checklist. Annual maintenance should include oil analysis, condenser tube cleaning (water-cooled), coil cleaning (air-cooled), refrigerant leak testing with certified equipment, safety device calibration and electrical system testing.
Critical chillers in hospitals, data centres and continuous-process facilities may require weekly parameter checks and monthly comprehensive inspections. Seasonal chillers should receive a full inspection and service before the cooling season starts and a shutdown service at the end of the season. In MapTrack, configure calendar-based maintenance triggers linked to each chiller asset to automate scheduling and ensure no inspection is missed.
Frequently asked questions
Applicable regulatory standards
This template aligns with the following regulations and standards:
- Ozone Protection and Synthetic Greenhouse Gas Management Act 1989 (refrigerant handling, leak detection and record-keeping)
- AS/NZS 1677:1998 - Refrigerating Systems (design, construction and installation requirements)
- WHS Regulations 2011, Chapter 5 - Plant and Structures (duty to maintain plant in safe condition)
- AS 3788:2024 - Pressure equipment - In-service inspection, including current amendments (where pressure equipment within the refrigeration circuit is in scope)
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Chiller maintenance checklist preview
The numbers behind this chiller maintenance checklist
Every figure below is sourced and dated, so you can quote it in a toolbox talk, a budget case or a board paper without having to chase the original report.
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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;">Chiller maintenance checklist</p>
<ul style="margin:12px 0 0;padding-left:18px;color:#374151;font-size:14px;line-height:1.6;">
<li style="margin:4px 0;">Chiller identification: asset ID, make, model, serial number, chiller type (centrifugal, screw, scroll, reciprocating), refrigerant type, location, current operating hours, date and technician name.</li>
<li style="margin:4px 0;">Compressor: record suction and discharge pressures and temperatures, check oil level and condition on sight glass, listen for abnormal noise or vibration, record motor current (amps) and compare to rated load amps (RLA).</li>
<li style="margin:4px 0;">Refrigerant circuit: check refrigerant charge level by monitoring superheat and subcooling, inspect for refrigerant leaks using an electronic leak detector or soap solution, record high-side and low-side pressures.</li>
<li style="margin:4px 0;">Condenser (air-cooled): inspect coil fins for dirt, damage and blockage, check condenser fan operation and motor current, clean coils if the approach temperature exceeds the manufacturer baseline.</li>
<li style="margin:4px 0;">Condenser (water-cooled): record entering and leaving condenser water temperatures, calculate approach temperature, inspect tube sheets for fouling and corrosion, schedule tube cleaning if approach temperature has increased.</li>
<li style="margin:4px 0;">Evaporator: record entering and leaving chilled water temperatures, calculate approach temperature, inspect for frost or ice formation indicating low flow or low charge, check insulation condition.</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/chiller-maintenance-checklist" style="color:#071D49;font-weight:600;text-decoration:none;">Chiller maintenance checklist</a> by MapTrack</p>
</div>Free to reuse, including commercially. This template is published under a Creative Commons Attribution 4.0 licence. Copy it, adapt it, put it on your own site or in your own docs. All we ask is that you credit MapTrack with a link back to this page. The snippet above already includes that credit, so if you use it as-is you’re covered.
Cite this template
Writing about this topic? You’re welcome to quote this checklist. Here’s the wording to use so your readers can find the original.
The MapTrack chiller maintenance checklist contains 24 checks across 5 sections.
- Short attribution
- MapTrack Chiller maintenance checklist, https://www.maptrack.com/templates/chiller-maintenance-checklist
- Reference list
- MapTrack. (2026). Chiller maintenance checklist [Checklist template]. Retrieved from https://www.maptrack.com/templates/chiller-maintenance-checklist
Free to reuse with credit under a Creative Commons Attribution 4.0 licence. If you’d rather link straight to it, the page is https://www.maptrack.com/templates/chiller-maintenance-checklist.
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