Getting repeated ground relay test failures as load shedding ends, as it tries to reconnect to the grid. Does this suggest an issue on the non-essential circuits (since those are off during load shedding and only on after grid reconnection) or could it be anywhere?
Right now it’s actually failing to come back online at all (restart, trip, restart trip, 10 times so far)
Just trying various breakers on the db for now to try get out of the tripping cycle
Ok, have tried every breaker, and still in a tripping cycle. Going to trip all outputs from inverter as a last resort, otherwise will have to bypass the inverter
I assume this is double pole? If yes… then the answer is simple. The other breakers didn’t do anything because a) they only break the live, and b) the fault is between a neutral and earth.
Check the menu, there is a menu somewhere that tells you on what step the relay test failed, and that should tell you whether it was looking for a bond that should be there, or testing for a bond that shouldn’t be there. I’m guessing it is the latter… there is a TN bond (or at least some sort of low impedance path) on the output that should not be there.
To add some pictures, dropping the breaker in the left allows the system to resync with the grid.
Dropping to double breaker in the right (Flat essentials) did not fix it.
Can I thus assume that the issue lies on one of the single pole breakers in between?
0x24 (right most byte). The 4 is a global error flag (something went wrong). The 2 means “GND Relay Error (either did not open/did not close) measured by 2nd µC”
Middle byte is zero, no info there.
Left is 0x80. That gives no info. Only the left most bits (0x01 and 0x02) would tell us if the failing step was an open- or closed relay.
So this is a very generic error.
What I would do is open all breakers (all lives), then pull all the neutrals from the neutral bar. Bring them back one by one (connect neutral, close corresponding live), until you find the circuit with the fault.
Unplug all appliances from that circuit, see if that resolves it. That gets you the bad appliance.
Test the RCD. With a neutral fault of this magnitude… I feel distrustful of that RCD.
Just to clarify with a silly question:
The RCD in the pic below is the 2nd item from the left, correct? (ie, the earth leakage)
If so, I agree with @JacoDeJongh (discussion offline) that the fault may lie in a light circuit going through the left-most breaker but not the earth leakage.
Those breakers pictured below (they’re the row above the essential row on my DB, but are downstream of the essentials breaker)