Service; Troubleshooting - SMA MLX Serie Guia De Instalacion

Service

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
4 4
ID
Display
Description
Action
DNO
Hotline
PV
Grid-related Events
ID Status
message
1–6
7–9
10–15
16–18
19, 22
31–33
34–37
40 AC grid not
OK
41–43
48, 51
54–56
61
62
Table 4.1 Grid-related Events
28
Indicates whether the event relates to grid, PV, internal or fail safe issues.
The specific event ID.
Text shown in display.
Description of the event.
Description of which action to take prior to contacting any other parties.
If the prescribed action has not identified the malfunction, contact the DNO for further assistance.
If the prescribed action has not identified the malfunction, contact the inverter hotline for further assistance.
If the prescribed action has not identified the malfunction, contact the PV supplier for further assistance.
Description
Grid voltage too low.
Grid voltage average over 10 minutes
too high.
Grid voltage too high.
The inverter has detected a voltage peak
on the grid.
Grid frequency too low or too high.
DC grid current too high.
Residual Current Monitoring Unit (RCMU)
has measured an excessive current.
The AC grid has been out of range for
more than 10 minutes (frequency and/or
voltage).
Fault ride through. The inverter has
detected that grid voltage was below or
above a certain level.
Grid frequency too low or too high.
DC grid current too high (stage 2).
Loss of mains, open phase detected.
Loss of mains.
L00410644-01_2q / Rev. date: 2014-06-02
Action
Check voltage and AC installation. If the voltage is
zero, check the fuses.
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.
Check voltage and AC installation.
Check voltage and AC installation.
Check grid frequency.
For repeated daily occurrences, perform onsite grid
analysis.
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.
Check grid frequency, grid voltage, SW version, and
grid code setting.
If this event is reported several times each day,
perform onsite grid analysis.
Check grid frequency and AC installation.
For repeated daily occurrences, perform onsite grid
analysis.
If the event reoccurs several times each day, contact
the DNO.
If the event reoccurs several times each day, contact
the DNO.
DNO Hotline PV
x - -
x - -
x - -
x - -
x - -
- x -
- x -
x - -
x - -
x - -
x - -
x - -