Chapter 3: Commissioning the Installation
This chapter describes how to activate the system, pair the poweroptimizers to the SMI
and verify the proper functioning of the system.
Step 1: Activating the System
1. Make sure that the SMI is connected to the auxiliary power supply. Verify that its
ON/OFF switch is OFF.
A status screen similar to the following appears on the SMI LCD panel
V d c [ v ] I d c [ A ] P d c [ w ]
1 5 . 1 - - - - - -
P _ O K : 0 0 0 / 0 0 0
O F F
2. Verify that the following information appears on the LCD panel:
P_OK: Appears only upon pairing process completion and first telemetry
reception from the power optimizers. Indicates connection to the power
optimizers and that at least one power optimizer is sending monitoring data.
000/000: Appears only upon first telemetry reception from the power
optimizers. Indicates the number of power optimizers that have been paired to
this SMI.
Vdc [V]: The DC input voltage of the longest string connected to the SMI. There
should be a safety voltage of 1V for each power optimizer in the string.
NOTE
A measurement error on the SMI LCD of ±3 V is acceptable.
Idc [A]: If the current-sensor option is set, displays the input current to the SMI .
Otherwise displays ----.
Pdc [w]: If the power-sensor option is set, displays the input power to the SMI .
Otherwise displays ----.
OFF: The SMI ON/OFF switch is in the OFF position. In MI, the display is always
ON.
If the LCD panel shows 0V:
1. Verify that the PV modules are not shaded or otherwise obstructed.
2. Check for proper power optimizer, string and DC input connection.
3. Verify the correct polarity of the DC input connection.
SMI-180 Installation Guide MAN-01-00157-1.1
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Chapter 3: Commissioning the Installation