3 Initial Setup and Start
3.1 User
Interface
The user interface comprises:
•
Local display, for all inverter variants. The local
display enables read-only status information of
the inverter. It is not possible to configure or set
up the MLX inverter via the display. The ‘
#
’ in the
display explains the operation modes.
•
Local Commissioning and Service Tool (LCS Tool).
The LCS Tool enables configuration of 1 or
multiple MLX inverters.
3.1.1 Operation Modes
The inverter has 5 operation modes, indicated by LEDs.
Status
LEDs
Off grid
Green
- - - - - - - - - - - - - - - - -
Red
- - - - - - - - - - - - - - - - -
Connecting
Green
▬
██
▬
██
▬
██
▬
██
▬
██
▬
Red
- - - - - - - - - - - - - - - - -
On grid
Green
▬
██████████████████
▬
Red
- - - - - - - - - - - - - - - - -
Internal inverter event
Green
▬
██
▬
██
▬
██
▬
██
▬
██
▬
Red
- - - - - - - - - - - - - - - - -
Fail safe
Green
- - - - - - - - - - - - - - - - -
Red
▬
██
▬
██
▬
██
▬
██
▬
██
▬
Table 3.1 Operation Modes
Off grid (standby)
(LEDs off)
#
0-51.
When no power has been delivered to the AC grid for
more than 10 minutes, the inverter disconnects from the
grid and shuts down. User and communication interfaces
remain powered for communication purposes.
Connecting
(Green LED flashing)
#
52-53.
The inverter starts up when the PV input voltage reaches
the minimum DC feed-in voltage. The inverter performs a
series of internal self-tests, including measurement of the
resistance between the PV arrays and earth. Meanwhile, it
also monitors the grid parameters. When the grid
parameters have been within the specifications for the
required amount of time (depends on grid code), the
inverter starts to energise the grid.
On grid
(Green LED on)
#
60.
The inverter is connected to the grid and energises the
grid. The inverter disconnects when:
•
it detects abnormal grid conditions (dependent
on grid code), or
•
an internal event occurs, or
•
PV power is insufficient (no power is supplied to
the grid for 10 minutes).
The inverter then enters connecting mode or off grid
mode.
Internal Inverter Event
(Green LED flashing)
#
54.
The inverter is waiting for an internal condition to be
within limits (for example a too high temperature) before
it will go back on grid.
Fail Safe
(Red LED flashing)
#
70.
If the inverter detects an error in its circuits during the self-
test (in connecting mode) or during operation, the inverter
goes into fail safe mode, disconnecting from grid. The
inverter will remain in fail safe mode until power has been
absent for a minimum of 10 minutes, or the inverter has
been shut down completely (AC+PV).
3.2 Display
NOTICE
It can take up to 10 sec. until the display activates, after
power up.
The integrated display on the inverter front gives the user
access to information about the PV system and the
inverter.
Initial Setup and Start
20
L00410644-01_2q / Rev. date: 2014-06-02
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