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Identificazione: MD-AL-GI-00
Rev. 4.0 del 31.01.18 - Applicazione: GID
Manual of 07/06/2019 Rev. 1.1 “User Manual for 20K-33KTL”
Insulation
The user can change the value of the insulation resistance directly from the LCD display. The user must first
copy the TXT files to the SD card. These files can be requested from Zucchetti Centro Sistemi Spa technical
support.
Select 15 “Insulation” and press “OK” to enter the menu for setting the insulation resistance. The display will
show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and
“Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Incorrect, try again,” press the “Back” key and enter the password again. When the password has been
entered correctly, you can enter the menu. The new insulation resistance will now be loaded on the inverter
automatically.
If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.
Attention: do not enter this menu if the microSD card is not inserted in the appropriate slot of the inverter
or if the correct TXT files have not been copied to it.
Relay Test
Select “16. Test relay” and press “OK” to enter the test menu of the relay inside the inverter. Use the “Up” and
“Down” keys to select the “1.Enable” or “2.Disable” option and select it with the “OK” key. If the option “1.
Enable” is selected, the relay test is performed. If the setting is successful, “OK” will be displayed; otherwise,
“Error” will be displayed.
Reactive Power Setting
Select 17 “Reactive Set” and press “OK” to enter the menu for setting the reactive power produced. The
display will show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up”
and “Down” keys to select the number and “OK” to move to the next one, and confirm. If the display shows
“Incorrect, try again,” press the “Back” key and enter the password again. When the password has been
entered correctly, you can enter the menu. Now you can use the “Up” and “Down” keys to select the
“1.Enable” or “2.Disable” option and select it with the “OK” key. If the “1.Enable” option is selected, you will
be able to use the “Up” and “Down” keys to select the options “Under-excited”, “Grid Manager”, and “Over-
excited”, and you can indicate the value of the reactive power produced for each of them (expressed as the
value of cosφ=*.**). If the setting is successful, “OK” will be displayed; otherwise, “Error” will be displayed.
Power derating
Select “18. Derating P(W)” and press “OK” to enter the relative menu, from which you can enable the
“Derating” function, i.e. the possibility to set the power produced by the inverter. The display will show
“Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and “Down” keys
to select the number and “OK” to move to the next one, and confirm. If the display shows “Incorrect, try
again,” press the “Back” key and enter the password again. When the password has been entered correctly,
you can enter the menu. With the “Up” and “Down” keys you can set the “1. Enable” and “2. Disable” option,
and select it with the “OK” key. If the “1.Enable” option is selected, use the “Up”, “Down” and “OK” keys to
select the percentage value (between 0 and 100) of the maximum power that the inverter will produce; if the
solar radiation allows a greater amount of energy to be produced, the inverter will carry out the necessary
operations to limit the output power to the set value. If the setting is successful, “OK” will be displayed;
otherwise, “Error” will be displayed.
Grounding check
Select “19. Check PE Line” and press “OK” to enter the menu for checking the ground line. The display will
show “Enter PWD!”, press “OK” to enter the password. Enter the password “0001” using the “Up” and “Down”
keys to select the number and “OK” to move to the next one, and confirm. If the display shows “Incorrect, try
