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9.2 Maintenance
9.2.1 Maintenance Notices
Risk of inverter damage or personal injury due to incorrect service!
• Be sure to use special insulation tools when perform high-voltage operations.
• Before any service work, first disconnect the grid-side AC circuit breaker and
check the inverter status. If the inverter indicator is off, please wait until night to
disconnect the DC switch. If the inverter indicator is on, directly disconnect the
DC switch.
• Turn the DC switch from ON to OFF, the DC switch can be locked here. （For
countries “AU” and “NZ”）
• After the inverter is powered off for 5 minutes, measure the voltage and current
with professional instrument. Only when there is no voltage nor current can op-
erators who wear protective equipment operate and maintain the inverter
• Even if the inverter is shut down, it may still be hot and cause burns. Wear pro-
tective gloves before operating the inverter after it cools down.
When maintaining the product, it is strictly prohibited to open the product if there
is an odor or smoke or if the product appearance is abnormal. If there is no odor,
smoke, or obvious abnormal appearance, repair or restart the inverter according to
the alarm corrective measures. Avoid standing directly in front of the inverter dur-
ing maintenance.
To prevent misuse or accidents caused by unrelated personnel: Post prominent
warning signs or demarcate safety warning areas around the inverter to prevent
accidents caused by misuse.
Restart the inverter only after removing the fault that impairs safety performance.
As the inverter contains no component parts that can be maintained, never open
the enclosure, or replace any internal components.
To avoid the risk of electric shock, do not perform any other maintenance opera-
tions beyond this manual. If necessary, contact your distributor first. If the problem
persists, contact SUNGROW. Otherwise, the losses caused is not covered by the
warranty.
User Manual 9 Troubleshooting and Maintenance
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