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7 maintaining the accessories, 5 checking the switch cabinet from the outside, 1 maintaining the sunny string-monitor – SMA SC 500HE-20 Maintenance Manua User Manual

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Table of Contents

SMA Solar Technology AG

4

SC500-800HE20-WH-en-10

Maintenance Manual

6.5 Checking the Switch Cabinet from the Outside . . . . . . . . . . . . . . . . . 27

6.5.1 Checking the Door Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.5.2 Checking the Locking Devices and Hinges . . . . . . . . . . . . . . . . . . . 28
6.5.3 Checking the Surface of the Switch Cabinet . . . . . . . . . . . . . . . . . . 28
6.5.4 Checking the Switch Cabinet for Corrosion. . . . . . . . . . . . . . . . . . . 29

6.6 Mounting the Protective Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6.7 Mounting the Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.8 Maintenance after Connecting the Control Voltage . . . . . . . . . . . . . 31

6.8.1 Connecting the Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6.8.2 Checking the Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.8.3 Checking the Heating Element and Hygrostat . . . . . . . . . . . . . . . . . 32

7 Maintaining the Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

7.1 Maintaining the Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . . . . 34

7.1.1 Disconnecting the Sunny String-Monitor . . . . . . . . . . . . . . . . . . . . . 34
7.1.2 Maintenance Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.1.3 Overview of the Main Components. . . . . . . . . . . . . . . . . . . . . . . . . 35
7.1.4 Checking the Mounting Location and Installation . . . . . . . . . . . . . . 38
7.1.5 Checking the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.6 Checking the Enclosure Interior . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.1.7 Checking the Base Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.1.8 Checking the Covers and Labels . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7.1.9 Checking the Fuses and Fuse Holders . . . . . . . . . . . . . . . . . . . . . . . 42
7.1.10 Checking the Screw Connections and Clamp Connections. . . . . . . 43
7.1.11 Checking the Surge Arrester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.1.12 Checking the Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.1.13 Checking Shunt Release (Optional). . . . . . . . . . . . . . . . . . . . . . . . . 44
7.1.14 Checking the Undervoltage Release (Optional) . . . . . . . . . . . . . . . 44
7.1.15 Checking the Earth Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
7.1.16 Checking the LEDs on the Measurement PCB . . . . . . . . . . . . . . . . . 45