Service
DX CRAC Servicing | Brisbane Sydney Melbourne
Direct expansion CRAC unit maintenance for data centres, server rooms and mission-critical infrastructure.
CRAC Services delivers servicing for DX (Direct Expansion) CRAC systems — the most common precision-cooling configuration in Australian data centres, server rooms, and telecommunications facilities. DX systems use refrigerant directly between the indoor cooling unit and an outdoor condenser, providing efficient localised cooling with no chilled-water plant required.
Our ARC-licensed refrigeration technicians service the full population of DX CRAC equipment — Vertiv Liebert PEX, PDX and PCW; Schneider Uniflair LE/TD; Stulz CyberAir; Daikin Applied; Mitsubishi Heavy and Climaveneta — across Brisbane, Sydney, Melbourne and regional Australia.
Every service is delivered against AS/NZS 5149 (refrigerating systems safety), AS/NZS 1668 (mechanical ventilation), and the Australian Refrigeration and Air Conditioning Council (ARCtick) handling code. Refrigerant logs and recovery records are maintained for compliance.
Scope
Our service
includes
- 01Compressor and condenser performance testing
- 02Refrigerant pressure and superheat checks
- 03Air filter replacement and airflow balancing
- 04Coil cleaning (indoor and outdoor)
- 05Humidifier service and water-treatment check
- 06Electrical connection inspection (infrared)
- 07Control system diagnostics and alarm review
- 08Setpoint validation against ASHRAE TC 9.9
- 09Service report (within 48 hours)
Recommended schedule
Preventative service intervals
01
Monthly / Bi-Monthly (in-house)
- Filter inspection
- Visual airflow check
- Drain pan and condensate check
- Alarm panel review
02
Quarterly (professional)
- Refrigerant pressure check
- Compressor electrical test
- Fan motor and bearing inspection
- Humidifier descale
- Coil clean (lighter)
03
Annually (comprehensive)
- Full coil clean (indoor + outdoor condenser)
- Compressor performance test
- Refrigerant leak detection
- Electrical IR scan
- Control firmware update
- Compliance report
Equipment
Equipment types
we service
FAQs
Frequently asked questions
What is a DX CRAC unit?
A DX (Direct Expansion) CRAC unit cools the room using a refrigerant cycle that runs directly between the indoor cooling unit and an outdoor air-cooled or water-cooled condenser. Unlike chilled-water systems, DX units do not require a separate chiller plant — making them well-suited to small to mid-size server rooms and standalone data halls.
How often should DX CRAC units be serviced?
Quarterly servicing is the industry standard for mission-critical DX CRAC, with annual comprehensive services adding refrigerant leak detection, coil cleaning, and electrical IR scans. Sites with high-density loads (>10kW/rack) or heavy dust exposure may require monthly filter checks.
Are you ARC-licensed for refrigerant work?
Yes. All our refrigeration technicians hold current ARCtick licences (RAC1 / RAC2) issued by the Australian Refrigeration Council, which is a legal requirement for any refrigerant handling work in Australia. We maintain a full refrigerant logbook for each site as part of compliance records.
What refrigerants do you support?
We service all common DX CRAC refrigerants in Australian use including R410A (legacy installations), R32 (mid-life equipment), and R513A (current low-GWP DX CRAC, e.g. Vertiv CoolPhase). We do not handle R22 except for emergency leak repair pending replacement, in line with the phase-out programme.