I had a look at a chiller this morning, a York screw chiller. The thing has tripped out on the fault code low current/mp/hp. Manual Hp switch hasn't tripped, HP wasn't that high anyway. Low current I don't think was to blame. I noticed though that the discharge temperature was a bit on the high side at 85 degrees c or so. Bear in mind that the ambient outdoor temp is still a bit low, so the condenser has probably got a bit of excess capacity (in the summer I think that high discharge temp might have tripped out the chiller). On the black box/CT/phase protector (whatever you want to call it) the number 5 is displayed, relating to high temperature, so I suppose a high current draw might have caused this. I think taking everything into account, the thing has an overcharge, even though the manufacturers specified weight had been charged into the unit by the service company. I have isolated the problem circuit to avoid it running and advised the customer.
Any other ideas?? A second opinion I suppose is what I need.
Thanks