Daikin VRV
Remote Service
Case Study
Daikin VRV 3-Pipe Heat Recovery system with a
multi–Branch Selector Box for each apartment.
The system was installed and commissioned 2 years ago.
The Resident of an apartment has opened an urgent service ticket advising the Living Room and Bedroom units were not heating properly. Also, sometimes it felt like they were cooling while calling for heat.
1 |
Schedule a site visit |
2 |
Travel to site |
3 |
Connect a service tool, and collect a current, limited operational data |
4 |
Analyze the collected data |
5 |
Find the fault and fix it |
6 |
Collect new data and verify the fix |
As the site was connected to the HVAC Remote Diagnostics solution, the HVAC engineer activated an anomaly test operation. Following several deep remote operation tests, the Service Solution suggested that it is likely that there is cross-communication wiring between different ports on the Branch Selector Box. As a result, while switching ON the Living Room indoor unit, the refrigerant was flowing to another indoor unit.
As an immediate temporary solution to allow the residents to have heat, the engineer suggested that the two crossed units should be operated simultaneously until the engineer visits on the next day.
An engineer then traveled to the site and corrected the fault.
Engineer time on site for fault correction: 45 minutes.