SMA MLX Series - Manual (Page 29)

4 Service
4.1 Troubleshooting
The information is organised in tables showing messages
appearing in the LCS Tool, known as events. The tables
contain descriptions of events as well as explanations of
which actions to take when an event occurs.
Event Type Indicates whether the event relates to grid, PV, internal or fail safe issues.
ID The specific event ID.
Display Text shown in display.
Description Description of the event.
Action Description of which action to take prior to contacting any other parties.
DNO If the prescribed action has not identified the malfunction, contact the DNO for further assistance.
Hotline If the prescribed action has not identified the malfunction, contact the inverter hotline for further assistance.
PV If the prescribed action has not identified the malfunction, contact the PV supplier for further assistance.
Grid-related Events
ID Status
message Description Action DNO Hotline PV
1–6 Grid voltage too low. Check voltage and AC installation. If the voltage is
zero, check the fuses.
x - -
7–9 Grid voltage average over 10 minutes
too high.
Check that the installation is correct according to
the installation guide. If so, increase the mean
voltage limit according to 3.3.1 Getting Started.
x - -
10–15 Grid voltage too high. Check voltage and AC installation. x - -
16–18 The inverter has detected a voltage peak
on the grid.
Check voltage and AC installation. x - -
19, 22 Grid frequency too low or too high. Check grid frequency. x - -
31–33 DC grid current too high. For repeated daily occurrences, perform onsite grid
analysis.
- x -
34–37 Residual Current Monitoring Unit (RCMU)
has measured an excessive current.
Turn both DC and AC off and wait until the display
turns off. Then turn on DC and AC and observe if
the event reoccurs.
Visual inspection of all PV cables and modules.
- x -
40 AC grid not
OK
The AC grid has been out of range for
more than 10 minutes (frequency and/or
voltage).
Check grid frequency, grid voltage, SW version, and
grid code setting.
x - -
41–43 Fault ride through. The inverter has
detected that grid voltage was below or
above a certain level.
If this event is reported several times each day,
perform onsite grid analysis.
48, 51 Grid frequency too low or too high. Check grid frequency and AC installation. x - -
54–56 DC grid current too high (stage 2). For repeated daily occurrences, perform onsite grid
analysis.
x - -
61 Loss of mains, open phase detected. If the event reoccurs several times each day, contact
the DNO.
x - -
62 Loss of mains. If the event reoccurs several times each day, contact
the DNO.
x - -
Table 4.1 Grid-related Events
Service
28 L00410644-01_2q / Rev. date: 2014-06-02
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