I have a RTAA air cooled trane chiller that has 2 circuts on it. I have had problems with circut #1 going in to a alarm that is 1B7 that is a compressor overload alarm then it will have a code for low oil flow, then it will have a alarm on the condenser pressure being high and then a loss of comunication, then a alram on the evap. pressure being low. I fixed to leaks on this circut, Turned the power back on. Let oil warm for 45-60 MIN. turn the switch back to atuomatic mode, then before the compresser even started, it was locked out on compresser overload again!!! Starting to wonder if the microprosser board might be going bad. My coil is clean all condenser fans are coming on when it runs. THis makes the other circut run @ a overloaded state to up to 120% then it will shut down..
Has anybody seen these symptoms ?? Is the board flaking out ??? I checked all the conections with the little plastic tool trane gives you and reconcted all the plugs and jacks as well. THere is 5 microprosser boards on this unit and they all have to "talk" to each other.
And lets not talk about the "ice Mode" !!!