Robert had tried to operate the YEND chiller 1 on its variable speed drive but had difficulties with it.

I spent some time out in the chiller yard today and the chiller now appears to be working at 35 hz (rather than the line frequency) I am not sure why it is working now but it may have just been a startup issue after having sat for a long time with no water flow through the heat exchanger. I did have trouble starting the unit but ran the frequency up to 50hz where the chiller started and continued to run. After several hours I have dialed the frequency down to 35 hz. Temperatures in the heat exchanger(evaporator) appear to be normal. The error message when tripped was " Chilled Water Flow(Ent Wtr Temp)"

If there are problems with cooling in YEND please switch to the other chiller. (Or call me)

john