SMA SSM-U-1615 - Manual (Page 54)

Maintenance under voltage-free conditions
Task See
Checking the protective covers Section 10.3.2, page 55
Performing the visual inspection Section 10.3.3, page 55
Checking the condensate drain Section 10.3.4, page 56
Checking the vent plug Section 10.3.5, page 56
Checking the seals Section 10.3.6, page 56
Checking the labels Section 10.3.7, page 57
Checking the LEDs Section 10.3.8, page 58
Checking the bolted, clamp and plug connections Section 10.3.9, page 58
Checking the inline fuse connectors* Installation manual of the inline fuse con-
nector
Checking the ground connection Section 10.3.11, page 59
* available as an accessory
10.3 Maintenance Work
10.3.1 Checking the DC Load-Break Switch
1. Disconnect the DC subdistribution from voltage sources (see Section 8.2, page 47)
2. Check whether the DC load-break switch has disconnected the contacts as follows:
• If you are using the alarm contact set (see Section 14, page 72), check on the user
interface of the inverter whether the switching state of the DC load-break switch is
displayed correctly.
• If no alarm contact set is in use, check in the
inspection window of the DC load-break
switch whether the switch is open.
or
Use a continuity tester to perform a
continuity check.
10 Maintenance SMA Solar Technology AG
Operating Manual SSMUXX15-BE-en-10 54