I have a daikin altherma after 5 mins of running it trips the RCD. The outdoor has its own RCD and the indoor is on its own RCD, it’s the indoor RCD that keeps tripping. I tested the compressor and found it had seized up so after swapping out the compressor and inverter board I thought this would have solved the problem. But was the system was recharged and run the same problem occurred, once I reset the RCD the LC-16 lower pressure sensor came up and was wondering if this would trip the breaker out on low pressure as it’s saying it faulty
Heating & Cooling - Inverter
Answers & Comments
I have no knowledge of the device or appliance you are having trouble with - just wanted to mention; an RCD trips when the amount of power in the live supply is more than in the neutral return, that is to say some is being lost, typically through a leakage to ground.
This might be via a light mist of condensation or a breakdown in insulation or anything in between.
The RCD is very sensitive and very fast, though obviously some are faster or more sensitive than others even though the specifications should be identical, mass production isn't an exact science but works to a tolerance - clearly the indoor RCD is slightly superior...