Rooftop and packaged air-cooled chillers for commercial HVAC and process cooling.
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Our Service
Troubleshooting Guide
Tap a fault for likely causes, what to check on site, and when to call us out.
Likely causes
What to check
Compare ambient temperature to condensing temperature, confirm all condenser fans run in the right direction, and inspect coils for dust, pollen or hail damage.
When to call us
If pressures stay high after a coil clean, the charge or non-condensables need gauging and recovery by a certified technician.
Likely causes
What to check
Look for a visible dust mat between fins and check the air-off temperature across the coil face.
When to call us
Bent fins, corrosion or embedded scaling need chemical cleaning and fin combing rather than a hose-down.
Likely causes
What to check
Log sight glass bubbles, rising superheat and falling suction pressure over a week before topping up.
When to call us
Never keep topping up. Book electronic leak detection and a proper repair — repeat top-ups are illegal and expensive.
Likely causes
What to check
Record run times, chilled water flow rate and setpoint deadband on the controller.
When to call us
If cycles are under 10 minutes, call us before bearing and winding damage becomes a compressor replacement.
FAQ
We recommend a full service twice a year — one before the summer peak and one in the shoulder season — plus quarterly inspections on data centre and hospital plant. Rooftop units in dusty Gauteng industrial areas often need condenser coil cleans every quarter.
Callout and diagnostics start low; the repair cost depends on the fault. Coil cleans and sensor swaps are typically a same-day job, while compressor replacements are quoted per unit. Send us nameplate photos and we return a written quote within 24 hours.
We target same-day attendance across Gauteng and next-day for surrounding provinces. Emergency and after-hours callouts are available for critical cooling loads.
Yes. We assess compressor and oil compatibility, then advise on drop-in options such as R-513A or R-32 equivalents, including a full performance re-commission after the changeover.
York, Carrier, Trane, Daikin, McQuay, Hitachi, Johnson Controls and LG, plus most legacy and imported packaged units. We are not tied to one manufacturer.
We source spares through our supplier network. Common items like contactors, sensors, fan motors and filter driers are usually available within 24–72 hours; compressors and coils depend on brand lead times.
Send nameplate photos and we quote within 24 hours.
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