SMA Solar Technology AG GRID-CONNECT-BOX 12, Operating Manual, Page: 29 / 40

SMA Solar Technology AG 10 Maintenance
Operating Manual GRID-BOX-12-3-20-BE-en-11 29
10.2 Testing the Surge Arrester
Procedure:
1. Check whether the signal light on the surge arrester F340 is green or red.
If the signal light on the surge arrester is green, the surge arrester is in proper working order.
If the signal light on the surge arrester is red, the surge arrester is defective.
• Arrange for the surge arrester to be replaced immediately. Contact Service (see Section 13, page 35) for this.
2. Document the test result in accordance with the locally applicable standards and directives. This is your proof that
regular testing has taken place.
10.3 Maintenance Work Every 12 Months
Test interval for surge arresters
The test interval for surge arresters depends on the prevailing operating temperature.
• At prevailing operating temperatures of up to 40°C: every 6 months
• At prevailing operating temperatures of above 40°C: every 3 months
Instruction for end users
Because the protective cover remains in place during testing of the surge arresters, testing the surge arresters is not
hazardous and can be performed by the end user. However, if a surge arrester is defective, the surge arrester must
be replaced by a qualified person.
• Instruct the end user on the necessary procedure.
• Inform the end user that the inspection interval must be complied with.
• Inform the end user that in the event that the surge arrester is defective, a qualified person must perform the
subsequent steps.
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Danger to life due to electric shock
High voltages are present in the Grid-Connect-Box and the multicluster system. Touching live components can result in
death or serious injury due to electric shock.
• Disconnect the Grid-Connect-Box and multicluster system from all voltage sources before carrying out any work
on the Grid-Connect-Box (see Section 8, page 22).
The ambient conditions influence the maintenance intervals
The mounting location and ambient conditions influence the maintenance intervals. More frequent cleaning and
corrosion protection work may be necessary in adverse ambient conditions.
• If the Grid-Connect-Box is subject to adverse ambient conditions, SMA Solar Technology AG recommends
carrying out maintenance work on the Grid-Connect-Box more frequently.
• SMA Solar Technology AG recommends an optical inspection every month to determine maintenance needs.