McQuay legacy chillers kept running long past their nameplate life.
Overview
A lot of McQuay plant installed in South African buildings in the 1990s and 2000s is still going. Now part of Daikin Applied, McQuay units are very serviceable — we maintain, repair and controls-upgrade AGZ, ALS, PEH and WHS machines, and advise honestly when replacement makes better financial sense than another rebuild.
Model Families
Equipment
Troubleshooting
Tap a fault for likely causes, what to check on site, and when to call us out.
Likely causes
What to check
Confirm which refrigerant and oil are actually in the machine — the nameplate is often out of date.
When to call us
Call us before topping up; mixing oils on a retrofitted McQuay causes repeat compressor failures.
Likely causes
What to check
Check panel supply voltage and look for bulged capacitors or corrosion.
When to call us
MicroTech II spares are increasingly rare — call us early so we can source a board or plan a controls upgrade.
Likely causes
What to check
Inspect fin condition and check for refrigerant staining or oil residue at the U-bends.
When to call us
If coils are weeping, call us — patch repairs on eroded coils rarely hold and a re-coil is often cheaper long-term.
Parts & Spares
McQuay spares now flow through the Daikin Applied channel. Mechanical parts are generally obtainable; MicroTech II electronics and some legacy sensors are obsolete, so we often propose a modern controls retrofit that keeps the mechanical plant.
Coverage
FAQ
A routine McQuay service starts around R4 500 – R9 500 per unit depending on tonnage, compressor count and site access. Repairs are quoted separately after diagnosis. Send us the nameplate photos through the quote form and we come back with a fixed price within 24 hours.
Yes — we source OEM parts through South African distributors wherever the part is still catalogued. Where a component is obsolete or on long lead time, we offer a tested equivalent and tell you up front which route we are taking and what it does to the warranty.
Absolutely. Most of the McQuay plant we look after in Gauteng is well past its warranty period. We service, rebuild and re-commission older units rather than pushing you straight into a replacement.
We work with the unit controller and integrate it with BACnet, Modbus or your existing BMS head-end. That includes alarm mapping, trending, setpoint scheduling and getting fault history off the panel so we can see what actually tripped.
Same-day across Johannesburg, Pretoria, the East Rand, West Rand and the Vaal Triangle. Mpumalanga, North West, Free State and Limpopo are typically next-day, sooner for critical plant.
Yes — quarterly or bi-annual planned maintenance with logged readings, refrigerant records, water-side checks and a written condition report each visit. Contract clients get priority breakdown response.
Send nameplate photos and we quote within 24 hours.
Get a Free QuoteCall 067 603 9306Related