ABB UNO-DM-2.0-TL-PLUS Manual page 166

7. Remove the DC quick fit connectors
• Using the current clamp check the absence of current on DC side,
measurement each positive and negative DC input string cables
(check the correct setting of the current sensor).
• Remove all quick fit DC connectors
dedicated disconnect tool. To avoid mechanical interferences, use a
cable tie to collect the disconnected cables.
It is highly recommended to put labels on the cables in order to easily reconnect them to the
correct connectors once completed the service activities.
8. Discharge of the capacitor
• Wait the internal capacitors to be discharged. The discharge time of
the stored energy is indicated on the regulatory label.
9. Open the cover
• Access to the inverter by removing the front cover
• Visually inspect the components to identify the presence of any
overheating, signs of electric arcs, failure of the insulating devices,
loosen connections or cables not connected.
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8 - Maintenance
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(PV Connectors) using the
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