SMA SC 500HE-20 Maintenance Manua - Manual (Page 54)

7 Maintaining the Accessories SMA Solar Technology AG
54 SC500-800HE20-WH-en-10 Maintenance Manual
2. Ensure that the safety message labels on and inside the device are present and undamaged.
Replace safety message labels if they are damaged or missing. The safety message labels can
be ordered from SMA using the SMA order number 86-0043660.
3. Check that the cover latches are undamaged and securely in place.
Replace the cover latches if they are damaged or loose.
7.3.8 Checking the Fuses and Fuse Holders
2. Ensure that all fuse holders are closed.
3. Ensure that the screw connections of the power cables are securely in place.
7.3.9 Checking the Screw Connections and Clamp Connections
2. Check that the clamp connections of the string cables are securely in place.
Replace the clamp connections on the string cables if they are loose.
3. Check that the clamp connections on the optional DC switch-disconnector are securely in place.
Replace clamp connections if they are loose.
4. Check the screw and clamp connections to the insulation and check the clamps for
discolouration or changes to their appearance.
Replace the screw and clamp connections if they are discoloured or if there are changes to their
appearance.
1. %"/(&3
Danger to life from electric shock or electric arc when touching live components.
• Disconnect the SMA String-Combiner (see Section 7.3.1).
1. %"/(&3
Danger to life from electric shock or electric arc when touching live components.
• Disconnect the SMA String-Combiner (see Section 7.3.1).
1. %"/(&3
Danger to life from electric shock or electric arc when touching live components.
• Disconnect the SMA String-Combiner (see Section 7.3.1).