6.4.2 Maintenance guidance. INVT XG3-10kW, XG3-10KTL Single-phase On-grid Solar Inverter

Grid-tied single -phase solar inverter Running

Check Item Inspection Method

Maintenance

Cycle

Electrical connections

Cooling fan maintenance and replacement

Security function

Check whether the system cable connection is loose, whether the inverter wiring terminal is loose, and then tighten it according to the method specified in section 4.

Check whether the cable is damaged, especially whether the rubber skin in contact with the metal surface has cut marks.

For three-phase inverter products, observe whether the air inlet and outlet are normal, and check whether there are cracks in the fan blades. Listen for abnormal vibration when the fan is running. If necessary, clean the air inlet and outlet; if the fan is abnormal, it needs to be replaced in time, see section 6.4.2.

Check the inverter LCD and the shutdown function of the system. Simulate stop and check the stop signal communication. Check the warning labels and replace them if necessary.

Once per half a year

Once per half a year

Once per half a year

6.4.2 Maintenance guidance

Inverter cleaning

The cleaning steps are as follows:

(1) Disconnect the input and output connections.

(2) Wait ten minutes.

(3) Use a soft brush or vacuum cleaner to clean the surface of the inverter and the air inlet and outlet.

(4) Repeat the operation content in section 6.1.

(5) Restart the inverter.

Fan maintenance

 Stop the inverter before maintenance work, and all power inputs of the inverter must be disconnected.

 Wait at least 3 minutes for the capacitors inside the inverter to fully discharge before starting maintenance work.

 Only professional electricians can perform maintenance and replacement of the fan.

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Grid-tied single -phase solar inverter Running

Step 1: Stop the inverter and disconnect the electrical connection.

(1) Disconnect the input and output connections.

(2) Turn the DC switch to the "OFF" position.

(3) Wait ten minutes.

(4) Disconnect all electrical connections at the bottom of the inverter.

Step 2: Disconnect the fan power plug and remove the fan cover at the bottom of the chassis.

Step 3: Use a soft brush or vacuum cleaner to clean the fan. If the fan is damaged, follow step 4.

Step 4: If the fan is damaged, remove the damaged fan and install the good fan to its original position.

Step 5 : Re-install the fan tray to the inverter in the reverse order and restart the inverter.

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Note

 Once the inverter stops due to an alarm, it is prohibited to start the inverter immediately. You should find out the cause and confirm that all faults have been eliminated before starting the inverter. The inspection should be carried out strictly in accordance with the steps in section 6.1.

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