How Often Should CRAC Units Be Serviced? (Australian Guide)
How Often Should CRAC Units Be Serviced? A Practical Guide for Australian Data Centres
Quick answer
CRAC units should typically be serviced every 3 to 6 months, depending on the operating environment, criticality of the load, and manufacturer recommendations. High-density or dusty environments may need quarterly attention, while clean, well-controlled rooms can often run on a 6-monthly cycle. Skipping scheduled services is one of the leading causes of avoidable data centre downtime.
If you are running mission-critical infrastructure, treat CRAC servicing the same way airlines treat aircraft maintenance: non-negotiable, scheduled, and documented.
Why CRAC servicing intervals matter
A CRAC unit is the only thing standing between your server room and a thermal shutdown. Modern servers throttle or shut down within minutes of losing cooling, and ambient temperatures in an unventilated rack can climb past 40°C remarkably quickly.
Regular servicing achieves three things:
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Prevents unplanned downtime by catching wear, leaks, and component fatigue early.
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Maintains efficiency, since a well-serviced unit consumes 10 to 25% less power than a neglected one.
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Protects warranty cover, because most manufacturers require documented service history for warranty claims.
Across the sites we service in Brisbane, Sydney, Melbourne, and regional Australia, the pattern is consistent: rooms on a structured maintenance plan have far fewer incidents than rooms running reactively.
Recommended CRAC servicing schedules by environment
There is no single right answer. The correct interval depends on your environment. Here is a practical guide based on what we see in the field:
If your unit is approaching end of life (typically 12+ years), tightening the interval is sensible. Clients in Victoria can also see our dedicated Melbourne CRAC maintenance service.
What's actually included in a CRAC unit service?
A proper preventative maintenance visit is far more than a filter change. A typical Indigi Power & Cooling DX CRAC service visit covers:
Mechanical and refrigeration
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Compressor performance and amp draw checks
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Refrigerant pressures (suction, discharge, superheat, subcooling)
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Leak detection on accessible joints and coils
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Condenser fan operation and bearing condition
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Evaporator coil inspection and cleaning if required
Electrical
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Contactor and relay condition
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Cable terminations torqued and thermally imaged where possible
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Control voltage checks
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Earth bonding integrity
Airflow and filtration
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Filter replacement (or inspection on units with reusable filters)
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Blower and EC fan operation, vibration, and current draw
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Air pressure differentials across filters and coils
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Drain pan and condensate line cleaning
Humidification and reheat
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Humidifier cylinder condition (steam canister units)
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Reheat element function
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Water supply and conductivity checks where applicable
Controls, sensors, and alarms
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Temperature and humidity sensor calibration
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Alarm history download and review
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Building management system (BMS) communication checks
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Firmware version review
Reporting
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Written service report with measured values, photos, and recommendations
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Updated maintenance log for warranty and audit purposes
A service that does not produce a written report is not really a service. It is a visit.
Signs your CRAC unit needs attention before its next service
Even with a scheduled plan, some symptoms warrant an unscheduled call-out:
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Rising room temperature despite no change in IT load
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Frequent on/off cycling of the compressor
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Unusual noises, including grinding, screeching, or rhythmic banging
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Water on the floor or condensate pump alarms
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High humidity or condensation on equipment surfaces
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Repeated alarm events in the BMS or on the front panel
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Visible ice on suction lines or evaporator coils
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A sudden jump in power consumption for the same load
Catching any of these early is far cheaper than recovering from a thermal trip.
Seasonal considerations for Australian sites
Australia's climate creates specific maintenance pressure points:
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Pre-summer (September to October): verify condenser performance, clean fins, and confirm refrigerant charge. Summer ambient temperatures in Brisbane and Sydney push condensers to their limits.
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Post-summer (March to April): inspect for heat-related component fatigue, especially capacitors and contactors.
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Winter (June to August): focus on humidification systems, reheat elements, and low-ambient operation in cooler regional sites.
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Bushfire season: check filters more frequently if smoke ingress is possible. Replace rather than clean if heavily loaded.
Building these seasonal checkpoints into your maintenance plan dramatically reduces summer incident rates.
In-house vs specialist CRAC servicing
Many sites have a general HVAC contractor who looks after comfort cooling. That is fine for a tea-room split system, but precision cooling needs a specialist:
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Refrigerant handling for HFCs and newer low-GWP gases requires specific licences in Australia.
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Calibrated instruments are required for proper superheat, subcooling, and airflow measurements.
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Manufacturer training is needed for proprietary controllers from Stulz, Vertiv, Schneider, and others.
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Incident response in critical environments needs technicians who understand IT load behaviour, not just thermodynamics.
A general HVAC contractor servicing a CRAC unit is a bit like a GP performing heart surgery: same broad field, very different stakes.
How much does CRAC servicing cost in Australia?
Pricing varies based on unit size, location, and access, but as a rough guide:
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Small to mid-sized server room CRAC (under 30 kW): $800 to $1,800 per visit
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Mid-range data centre units (30 to 80 kW): $1,500 to $3,500 per visit
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Large or specialised units, multiple-unit sites: custom quoted
Annual maintenance contracts usually offer better value than ad-hoc call-outs, and they lock in priority response times, which matter when something fails on a 38°C Friday afternoon.
Frequently asked questions
Can I service my CRAC unit myself?
Filter changes and visual inspections, yes. Refrigerant work, electrical work, and controls calibration must be done by qualified technicians with the right licensing and tools.
What happens if I skip a service?
Compressor wear accelerates, efficiency drops, alarms become more frequent, and warranty cover may be voided. Most catastrophic CRAC failures we attend are traceable to deferred maintenance.
How long does a service visit take?
Typically 2 to 4 hours per unit for a standard service, longer for first-time visits, multi-unit sites, or units that have not been touched in a while.
Do you service CRAC units across all of Australia?
Yes. Indigi Power & Cooling supports clients in Brisbane, Sydney, Melbourne, Perth, Adelaide, and regional locations.
For more answers, visit our UPS, battery and CRAC FAQ page.
Lock in a CRAC servicing plan
The cheapest CRAC service is the one that prevents an outage. If you are running anything mission-critical, a structured maintenance plan is the single highest-ROI investment you can make in your cooling infrastructure.
Contact our team to discuss a CRAC servicing plan, or learn more about our DX CRAC servicing across Brisbane, Sydney and Melbourne.
