204 Troubleshooting guide
Manual Energy Storage Inverter ESI-S
depends on the error type. If the fault is considered critical by the system, the
label ‘Critical’ will be shown in the event logging window. In addition, the ESI item
in the ESI-Manager ‘Welcome’ screen will display the label ‘ACK. FAULT. Note
however that if the fault disappears fast, this label disappears too.
Depending on the type of critical fault and the number of occurrences, the inverter, when
running, may either:
−
Stop (open the DC and AC contactors) and await user intervention. In this
condition the alarm contact of the ESI-Manager will switch on after a
programmable delay and the ‘Armed’ indicator will be OFF. The user has to
acknowledge the fault (with the ESI-Manager, via Modbus via PQF-link or via
remote control) before the inverter can be restarted.
−
By default, the ‘Armed’ indicator is associated with the fourth digital output
contact (cf.
and
) The digital output contact monitor at the top
of
the
ESI-Manager display (Cf.
Figure 59 item 3) can be used to check the status
of the
digital output. Alternatively, the digital output considered can be
wired to
monitor the ‘Armed’ indicator by distance (cf.
Section 6.14.4
)
−
Stop (open the main contactor) and restart automatically if the fault disappears.
In this condition the alarm contact of the ESI-Manager will switch on after a
programmable delay and the ‘Armed’ indicator will be ON. If it takes a long time
before the fault disappears, the user may decide to give a inverter stop command.
This is done by highlighting the ‘ESI ACK. FAULT’ item in the ‘Welcome’ menu and
selecting
. After this, the ‘Armed’ indicator will be OFF.
−
Stop briefly without opening the contactors and continue running when the error
has disappeared. This is essentially the same case as the one described above but
the error phenomenon disappears faster than the time required to generate a
main contactor opening command.
If the inverter is OFF and a critical error occurs (e.g. network undervoltage), the errors
will also be reported in the event log. As long as a critical fault condition exists (e.g.
permanent undervoltage on one phase) the display will show the message ‘ACK. FAULT’
and the inverter will refuse to start. The ‘Armed’ indicator on the ESI-Manager will be
OFF.
When pressing ’ACK. FAULT’ the inverter will display a message relevant to the problem.
It also shows a list of the most recent critical faults that have been recorded.
Remark: If the inverter is in remote control operation and the message ‘ACK. FAULT’ is
present on the ESI-Manager, the fault can be acknowledged by sending a ‘STOP’
command by remote control (low signal). Alternatively, the remote control functionality
can be disabled by disabling the corresponding digital input functionality. Then, the fault
can be acknowledged locally.
shows the error treatment procedure in flowchart format.