SMA SB 2500 Installation - Manual (Page 37)

SMA Solar Technology AG Commissioning
Installation Manual SB25-30-IA-en-51 37
6 Commissioning
6.1 Commissioning the Inverter
1. Check the following requirements before commissioning:
– The inverter is securely in place.
– Correct connection of the AC cable (mains)
– Complete connection of all DC cables (PV strings)
– Unused DC inputs are closed using the corresponding DC connectors and sealing plugs
– The enclosure lid is securely screwed in place.
– External DC switch-disconnector additionally connected if Electronic Solar Switch available,
the Electronic Solar Switch (ESS) is firmly in place
– The miniature circuit-breaker is correctly laid out
2. Switch on the miniature circuit-breaker.
☑ All three LEDs are lit or flashing: the startup phase is starting.
☑ Green LED is lit: commissioning was successful.
or
☑ Green LED flashes in case of insufficient irradiation: mains connection conditions have not
yet been reached. Wait for sufficient irradiation.
or
☑ The red or yellow LED is lit or flashing: a fault has occurred. Proceed to step 3.
3. Read Section 9 "Troubleshooting" (page 51) and if necessary, eliminate the error or fault.
A Green LED Operation
B Red LED Earth fault or varistor defective
C Yellow LED Fault
Self-test in accordance with DK 5940, Ed. 2.2 during initial start-up
(applies to Italy only)
The Italian DK 5940 standard prescribes that an inverter can only operate on the power
distribution mains after the disconnection times for overvoltage, undervoltage, minimum
frequency and maximum frequency have been checked.
Start the self-test as described in Section 6.3 "Self-test in Accordance with DK 5940, Ed.
2.2 (Applies to Italy Only)" (page 39). The test takes approx. 8 minutes.