Hi Guys

I have a ciat chiller 'aquaciat ILZHE 130 400/3/50Hz' it is using 407c and it cools/heats a coil inside an air handler located right next to it

Being the time of year it is the chiller is now used for heating mode. Every morning the chiller is out on d6.1 alarm which is 5 HP cuts in 24hrs when in heating/building frost free mode.

Once this alarm is reser it runs fine for the day until it alarms during the night again and we reset it the following morning.

Would anyone familiar with ciat equipment have an idea of what may be causing this?