Is this a Daikin D-checker (more down below)? : r/HVAC
Daikin - Tutorial VRV Service Checker - YouTube
Daikin Service Diagnosis Tool – Apps on Google Play
Andrew Engineering on Twitter: "Any a/c contractor interested in buying a # Daikin Service Checker Type 3.1? Contact me for details https://t.co/2mGSqRxxCo #Midlandshour" / Twitter