Hi guys

Have an old air cooled Trane chiller ECGCH250 that's had a retro fit and XP40 fridge used.

We had an issue when carrying out the HP trip as it wasn't operating correctly and fault 'Mckt2' came up relating to 'pressostat fault'

We installed a new dual HP LP switch and used OFN to check that the trip operates as it should, which it did, so thought happy days.

Whilst this was operating chiller didn't throw up the above fault and was recharged.

Charged up and then the chiller decides to throw the fault up again.

At a loss, any ideas?

Controls issue?
Blocked capillary line?


Many thanks