SMA SC 500CP XT - Manual (Page 63)

6.5.1.3 Switching to Grounded Operation
1. Turn the key switch to Stop.
2. Wait 15 minutes before opening the inverter. This will ensure that the capacitors are discharged.
3. Manually switch on the GFDI circuit breaker.
4. Close the inverter.
5. Turn the key switch to Start.
6.5.2 Insulation Monitoring with Remote GFDI and Insulation Monitoring Device
6.5.2.1 Information on Insulating PV Modules with Remote GFDI and Insulation
Monitoring Device
Ground-fault monitoring does not provide protection from personal injury. Ground-fault monitoring and the insulation
monitoring device enable the PV array to be switched automatically from grounded operation to insulated operation.
To ensure that there is no insulation error on the grounded terminal, an insulation measurement is carried out. After
switching to insulated operation, the insulation monitoring device checks all poles of the PV array for potential
insulation errors. Switching to insulated operation is useful for performing maintenance or service work near the PV
array (e.g. cutting the grass) or for checking the status of the insulation at regular intervals.
6.5.2.2 Switching to Insulated Operation
1. Log into the user interface (see Section 9.4.1, page 81).
2. Set the parameter RemMntSvc to On.
☑ The insulation monitoring device starts collecting data. If the parameter IsoErrIgn is set to On, the error 3504 -
Insulation failure ignored is displayed.
✖ After 15 minutes, the displayed error 3504 does not disappear?
The insulation is defective.
• Have the insulation checked and, if necessary, repaired by a qualified person.
• Acknowledge the error.
6.5.2.3 Switching to Grounded Operation
1. Log into the user interface (see Section 9.4.1, page 81).
2. Set the parameter RemMntSvc to Off.
6.6 Deleting the Device Description
Whenever you replace a device in your PV power plant, the descriptions of the existing devices need to be deleted so
that the communication unit is able to detect new devices.
Procedure:
1. Log into the user interface as an installer (see Section 9.4.1, page 81).
2. Select Sunny Central > Info.
3. Select the button [Delete device descriptions].
6.7 Sending a ZIP File with Service Information
In order to help you quickly and effectively, a ZIP file containing service information may be required. This ZIP file can
be downloaded from the user interface. The files are protected with a service password.
6 Operation SMA Solar Technology AG
User Manual 63 SCCPXT-BA-E4-en-54