Commissioning SMA Solar Technology AG
46 SMC6-8TL-IEN101040 Installation Guide
6 Commissioning
6.1 Commissioning the Inverter
1. Check the following requirements before commissioning:
– The inverter is firmly fastened.
– Correct connection of the AC cable (grid)
– Full connection of the DC cables (PV strings)
– DC inputs that are not needed are closed with the corresponding DC plug connectors and
sealing plugs.
– The enclosure lid is securely screwed in place
– Electronic Solar Switch is securely plugged
– The line circuit breaker is laid out correctly
2. Switch on the line circuit breaker.
☑ Green LED glows: commissioning has been successful.
or
☑ Green LED flashes when there is insufficient irradiation: network connection conditions have
not yet been reached. Wait for sufficient irradiation.
or
☑ The red or yellow LED is glowing or flashing: there has been an error. Proceed to step 3.
3. Read section 9”Failure Search” (page61) and if necessary eliminate the fault or disturbance.
Self test in accordance with DK 5640, Ed. 2.2 for initial commissioning (applies
to Italy only)
The Italian DK 5940 standard requires that an inverter can first operate on the public grid
when the disconnection times for overvoltage, undervoltage, minimum frequency and
maximum frequency have been checked.
Restart the self-test as described in the following section 6.2”Self-Test in accordance with
DK 5940, Ed. 2.2 (applies to Italy only)” (page47). The test takes approx. 8 minutes.
A Green LED Operation
B Red LED Ground fault or varistor
defective
C Yellow LED Disturbance
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