I have a new building with a AGS175CH27-ER10. Yesterday morning I walked into a 85 degree building. Friday night they had some crazy storms roll through. It tripped out the chw pumps vfd's, a bunch of starters for exhuast fans and fan coils, and the one chiller.
So circuit 1 is tripped on low evap and circuit 2 is tripped on starter fault. Find the starter on 2 with a "51" code, which is "Current Sensor Offset Fault". To be honest don't know what that is.......so I ohm out the current sensors and they all read 11.1 ohms. So I hit the reset on the starter board. Won't reset. So I go to the Microtech and reset all alarms. Circuit 1 starts up, but circuit 2 is still showing starter fault and starter board still in fault. So I pull 120v from the starter board and reapply. Starter now says "Ready". But Microtech still showing starter fault. So I power down chiller and reboot everything. Both circuits come on.
The problem is circuit 2 is not showing any amperages or voltages on it's Mircotech controller. Circuit 1 is showing everything. So I verify voltages and amperages are ok. Mess around some more, but can't get that 2nd circuit to show voltages or amperages.
I'm thinking there is a problem with the serial card on the Microtech controller. Anyone else?
BTW- The only thing I could get off the starter was AGS/WGS D3 RVSS. It's a solid state starter w/ communications. There is nothing in the manual for it and I couldn't find a seperate manual for it.