A central AC is a single cooling system that covers an entire villa, company or mall using ducting, VRV/VRF, or fan coil units. Its maintenance is more complex than a split because it involves multiple indoor units connected by a ducting system or a shared refrigerant line.
In a central system, the outdoor compressor serves 4-30 indoor units at once. Any fault in the compressor means the entire villa is left without cooling. We have an engineering team specialized in VRF and VRV systems from Daikin, Carrier, LG, Mitsubishi and Samsung.
The most frequent faults we encounter while servicing Central — ranked by occurrence.
Refrigerant leak at the main branch pipe joints
Clogged large return-air filter
Failure of the main outdoor PCB control board
A faulty expansion valve in one indoor unit
Damaged drain pump in the cassette units
Clogged main drain tray from dust and algae
Detecting refrigerant leaks in the branch pipes
Deep cleaning of all indoor units and ductwork
Replacing expansion valves, drain pumps and control boards
Quarterly preventive maintenance for villas and companies
Programming and configuring the centralized remote controllers
Designing and installing new VRF/VRV systems
Usually a fault in that unit's expansion valve, or its drain pan is full.
The price is set after a technical inspection, because a central system differs from one villa to the next.
Yes. Quarterly contracts include pressure checks, cleaning, filter replacement and a written condition report.
Yes. We have a dedicated department for factories, hospitals and large malls.
Ducted = a large duct in the ceiling. Cassette = a square unit in the ceiling. Concealed = a unit hidden behind a false ceiling.
On-site diagnosis, clear pricing before any work, and a 6-month written warranty.