Couldn't decide whether to post this thread here or in troubleshooting section ?

York chiller, dreaded fault code-the usual LOW CURR/MP/HP. Chiller doesn't start on the problem circuit, just a couple of clicks and out on the fault, maybe after about 5 seconds. I thought it must have been the mecahnical HP switch when I got there, so had a look, but it had't tripped (pressed the reset but it was already in). Now usually I would have thought that a motor protection fault would not still be there as the compressor (a screw one) was not hot. If there had been another problem I had expected the chiller to start up for at least a few seconds before any current faults could have been detected, so as no current was ever drawn as the contactor never pulled in, I think perhaps the HP switch must have an open fault.

HELP please.
Thanks
James

PS I was only asked to look on way home so due to time being a bit short was only there 30 minutes and then we had a thunderstorm.