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4
Commissioning Guide
4.1 Check before starting
DANGER
Before proceeding to the next step of power on, please read carefully this manual "1 safety precautions"
and do a detailed check according to the table below.
In order to avoid danger, the multimeter and other instruments must be used to detect the voltage of the
metal parts inside the casing (protective ground) of the string inverter.
Once the string inverter is installed, the following items need to be checked carefully before power up.
Mechanical inspection
□ Please read "1 Safety Precautions" carefully.
□ Ensure that the environment of the string inverter is in the normal range.
□ Check if there are any foreign objects in the top and bottom of the string inverter cabinet.
□ The string inverter has enough space around for maintenance and heat dissipation.
□ No inflammables and explosives within 2m.
□ The cables are clearly marked and correct.
□
It is confirmed that there is no condensation inside the string inverter. If it has been found, it will be removed
with heating tools.
□ Ensure that all wiring screws are tightened according to torque requirements.
□ Ensure RS485 wiring is correct and reliable.
□ Make sure there is no gap between the input terminal and the waterproof lock.
Electrical inspection
□ Ensure that the connection of the string inverter is reliable and the polarity is correct.
□ The power cables and signal lines are all in conformity with the electrical safety regulations.
□ Signal terminals and power lines are properly matched with terminals.
□
The isolation area and warning signs have been set up around the string inverter to prevent others from
misoperation or proximity.
