MPP Solar 2424LV-HS User Manual page 45

Step 4: Switch on all AC breakers of Line wires in AC input. It's better to connect all of the inverters to the utility
at the same time. If not, it will display fault 82 in the following inverters. However, these inverters will
automatically restart. If detecting AC connection, they will work normally.
LCD display in Master unit
Step 5: If there is no more fault alarm, the parallel system is completely installed.
Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the
load.
Support three-phase equipment
Step 1: Check the following requirements before installation:
Correct wire connection

Ensure all breakers in Line wires at load side are open and each Neutral wires of each unit is connected

together.
Step 2: Turn on all of the units and configure LCD program 28 as P1, P2 and P3 sequentially. And then shut
down all units.
NOET: It's necessary to turn off switch when setting LCD program. Otherwise, the setting can not be
programmed.
Step 3: Turn on all units sequentially.
LCD display in L1-phase unit
Step 4: Switch on all AC breakers of Line wires in AC input. If AC connection is detected and three phases are
matched with unit setting, they will work normally. Otherwise, the AC icon
in line mode. Under this circumstance, you can switch wires of AC inputs from L2 phase and L3 phase. Or you
may exchange the LCD program 28 of P2 and P3 to solve this problem.
LCD display in L1-phase unit
Step 5: If there is no more fault alarm, the system to support 3-phase equipment is completely installed.
Step 6: Please switch on all breakers of Line wires in load side. This system will start to provide power to the
load.
Note 1: To avoid overload occurring, before turning on breakers at load side, it's better to have the whole
system in operation first.
Note 2: There is some transfer time for this operation. Power interruption may happen to critical devices,
which cannot tolerate transfer time.
LCD display in Slave unit
LCD display in L2-phase unit
LCD display in L2-phase unit
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LCD display in L3-phase unit
will flash and they will not work
LCD display in L3-phase unit