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Steps to take
1. Make sure that the units have been updated to the
latest firmware version. There have been various
VE.Bus error 11 related improvements in the
firmware. This may correct the error, and if it does
not, it will provide additional information to assist
troubleshooting.
2. Verify that system is properly wired to your
installation and your local codes. Remember to
check the earth connection on the unit AC input.
Earth should be grounded according to your local
grid rules. Do not connect Earth to Neutral in the
unit itself. This will create a safety hazard and
may prevent RCD devices from working. Contact
another licensed electrician if in doubt.
3. Disconnect the L and N wiring from the AC-out
terminals on each inverter/charger. Which, in case
of a parallel or three phase system, isolates the
AC-out connections for each unit. If the system
then starts normally there might be a problem with
a connected load (e.g. a leakage between load,
neutral and ground).
4. Check your Neutral-out connection. In most cases
there should be no external connection between
AC-in-Neutral to AC-out-Neutral, or to Earth.
In Australia, it is possible if required to install with a
connection between Neutral-in and Neutral-out using
AS4777.2:2015. Select either design configuration in
the grid code section while programming the
MultiPlus-II with firmware 466 and above.
After configuration, always confirm that the system is
safe with routine electrical safety checks in both
modes (e.g. test RCD operation with AC input
connected and disconnected).
5. Neutral and line input might be inverted. Check
the input connections, swap them if needed and
retry. In this case, “Failing step: 8” will show.
Detailed diagnosis
After updating your VE.Bus inverter/charger to
firmware 454 or higher, a detailed VE.Bus Error 11
report is available in the CCGX menu, under
MultiPlus → Alarm Status → VE.Bus Error 11
report.
The information shown is:
– A six-digit number; which contains all the details.
– An error ID (#16 for example). Note that this does
not count the number of VE.Bus errors; it’s just a
unique ID that can help recognizing that a new
error has occurred.
–Flags.
– The failed step; it counts backwards: step 9 → 8
→ 7 and so forth.
00_00_ZBP45_EN.book Page 52 Monday, October 19, 2020 9:52 AM
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