A4 form with checklist, measurement table and signature fields.Download PDFView the form
Looking for scheduled maintenance? See our VRF system maintenance page for maintenance intervals, the checklist, the maintenance form and the factors that determine the price.
About VRF / VRV systems
VRF systems are preferred in buildings that need zoned heating and cooling, such as offices, hotels, hospitals, schools and shopping malls. Daikin calls this technology VRV; other manufacturers use names such as VRF or Multi V. Because the system consists of dozens of indoor units on a single piping network, a communication error or a small leak in one indoor unit can affect the entire system.
What we do
- Fault code reading and diagnosis with service software
- Indoor and outdoor unit PCB repair and replacement
- Addressing, communication line and controller faults
- Refrigerant leak detection, nitrogen test, evacuation and charging
- Inverter compressor and fan motor replacement
- Electronic expansion valve (EEV) service
- Branch box and refnet joint checks
- Heat recovery (3-pipe) system settings
Common VRF faults
| Symptom / alarm | Possible cause | What we do on site |
|---|---|---|
| Communication error | Wiring, address conflict or PCB fault between indoor and outdoor units | Line measurement, address scan, board test |
| High pressure | Dirty condenser, fan fault, overcharge | Fin washing, fan check, charge measurement |
| Low pressure / low refrigerant | Leak, clogged filter, EEV fault | Leak detection, nitrogen test, valve service |
| Compressor protection | Phase imbalance, inverter board, oil return | Current and winding measurement, PCB test |
| Indoor unit leaking water | Condensate pump, clogged drain pan, slope | Pump test, drain pan and line cleaning |
Buildings we serve
We are headquartered in Etimesgut, Ankara. We provide VRF / VRV system service daily in Ankara, and on a project and contract basis across all 81 provinces of Türkiye, including İstanbul, İzmir, Bursa, Antalya, Konya, Kayseri, Eskişehir, Kocaeli, Adana, Gaziantep, Samsun and Trabzon. See our service areas.
Frequently asked questions
How many times a year should VRF system maintenance be done?
For commercial use, at least twice a year is recommended, before the summer and winter seasons. In heavily used hospitals and hotels, checks are done every three months.
Is it enough to tell you the VRF fault code over the phone?
Yes, the error code and equipment brand are usually enough for a preliminary diagnosis. The team arrives with the right part, making a first-visit fix more likely.
Do you maintain VRF systems of different brands?
Yes. We work with all brands, including Daikin VRV, LG Multi V, Mitsubishi, Toshiba, Samsung, Hitachi, Fujitsu, Midea and Gree.
How is a VRF refrigerant leak located?
The system is divided into sections and pressure-tested with nitrogen, the leak point is located with an electronic detector and bubble test, and after repair the system is evacuated and precisely recharged.