Persistent Issue with Quattro Inverter not switching on

[dognose]

@jvdspoel

The inverter will only switch on once i disconnect the VEBUS cable.

This is a known behaviour and mentioned in the docus. When you run a gx powered from ACOUT of the inverters, you have a chicken-egg-deadlock of both devices.

See:

20.2.20. Q20: Issues with Multi not starting when Cerbo GX is connected / Caution when
powering the Cerbo GX from the AC-out terminal of a VE.Bus Inverter, Multi or Quattro

Ensure that both the GX device and the MultiPlus are running the latest firmware.

If the GX device is powered via an AC adaptor connected to the AC-out of a VE.Bus Inverter, Multi or Quattro, a deadlock can
occur after the VE.Bus device is powered down, for example, during a black start or fault. In this state, the VE.Bus product will not
start until the GX device is powered, but the GX device cannot start without power either.

How to resolve the deadlock

• Unplug the VE.Bus cable from the GX device briefly. The VE.Bus device will immediately begin to boot.

How to avoid the deadlock
There are two options:

• Power the GX device directly from the battery
• Remove pin 7 in the VE.Bus cable connected to the GX device. Removing pin 7 allows the VE.Bus device to start
  independently of the GX device.

The fastest and easiest way to remove this pin is with a very thin flat head screwdriver. This can be inserted into the pin grove,
and then used to leverage out the gold contact plate. Be aware that this small highly conductive plate will fall out, so this should
not be done over the open unit.