The test works by activating the input one by one. The test takes 1-2 minutes and the inverter
continues to produce energy meanwhile. In menu B the result of the test can be read in the display
menu called PV configuration.
Upon test completion the display will automatically show the PV configuration detected; however,
only if the buttons on the display have not been used in the past 3 minutes.
For ULX 5400o, 2 out of 3 DC modules must be powered for the test to run. If not enough PV
power is available to power 2 modules, the test is postponed until sufficient PV power is available
for the second DC module to run.
Notice that the inverter continues to produce energy in the meantime.
DC3
+
DC2 DC2
+ +
DC1 DC1 DC1
t
On Grid
Test end
Illustration 2.1: PV configuration test
The display readout shows the status of the
test. The first line shows that this concerns the
PV configuration and the second line shows
which status the test is in or which configura-
tion it has detected.
PV configuration
INDIVIDUAL
The status field may show the following:
Display Text
Description
IDLE
PV configuration test has not yet been run. Shown before the inverter connects to
grid.
OFF
PV configuration test is disabled. Applicable to ULX 1800o and to inverters where
the test is otherwise disabled.
WAITING
The PV configuration test is ready to run, but only solar radiation for one PV input
is available. (Applicable to ULX 5400o). The inverter can only determine the con-
figuration of all three modules, when two are running.
PV-AUTODETECTING
The PV configuration test is running. No result yet.
INDIVIDUAL
The PV modules are connected in individual string configuration
PARALLEL 1-2*
The PV configuration has ended, concluding that inputs 1 and 2 are connected in
parallel string configuration.
PARALLEL 1-3*
The PV configuration has ended, concluding that inputs 1 and 3 are connected in
parallel string configuration.
PARALLEL 2-3*
The PV configuration has ended, concluding that inputs 2 and 3 are connected in
parallel string configuration.
PARALLEL 1-2-3
The PV configuration has ended, concluding that inputs 1, 2 and 3 are connected
in parallel string configuration.
Table 2.1: PV Configuration Test Status Field Text
*) The “PARALLEL 1-2” is only allowed for the ULX 3000o / 3600o inverter. The “PARALLEL 1-2”,
“PARALLEL 1-3”, and “PARALLEL 2-3” is not allowed for the ULX 5400o inverter.
2. Function Description
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