Hi all

I have been working on a Rhoss chiller Mod: TCAVB2045010247
R407c screw compressors 2 circuits.

Ive had Hp pressostat faults alm16
lots of issues, ranging from blocked gomax to transducers, faulty main contactor as star delta config.
The system starts ok usually and runs on head of about 15bar to 19bar.... Hp switch is set 25bar man reset.
All of a sudden the circuits will shutdown and trigger a Hp pressostat alarm????? When I check the switch it hasn't broken, also thermistor module is ok.... seem to trip when pressures are ok.
I have replaced the pcb for comp 2 which was faulty not outputing to run comp.....

Would be grateful for any info advice if anyone has had similar faults.....
I have called chiller4service but tech assist not much help.

Regards
Darren