Daikin - KRP - CoolMaster
maxifox
Posts: 209
Maybe someone has experience with interfacing a VRV system and AMX via RS232. I have Daikin FTXD60JV1B aircondition unit, which I would like to control via serial.
This is how I did that:
Daikin FTX --(HA connector S21)--KRP928BA2S--(F1F2)--CoolMaster1000--(RS232)--AMX
KRP just provides VRV interface to Coolmaster via F1F2 connector.
The problem is that Coolmaster cannot see any unit on the bus. I checked the CoolMaster (it is OK), even replaced KRP and connectors with others. It should be something simple and I suppose FTX configuration or firmware...
Anyone has similar experience?
This is how I did that:
Daikin FTX --(HA connector S21)--KRP928BA2S--(F1F2)--CoolMaster1000--(RS232)--AMX
KRP just provides VRV interface to Coolmaster via F1F2 connector.
The problem is that Coolmaster cannot see any unit on the bus. I checked the CoolMaster (it is OK), even replaced KRP and connectors with others. It should be something simple and I suppose FTX configuration or firmware...
Anyone has similar experience?
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Comments
To keep anyone interested updated... It is found that for some reason new KRP version requires 16V DC voltage on F1,F2 lines (this is the voltage measured between F1 and F2). Usually, this is how it is if a Daikin central controller is used. But not in our case (just KRP and CoolMaster).
So we ordered not so expensive Daikin DCS301 and by thus provided power to F1F2 line. Now it is all OK with controlling Daikin AC via RS-232 with CoolMaster.