1. If it only happened in bad weather (such as: in the evening or morning); but it’s normal at other times, so the failure probably is caused by the insufficient input power, this case is a normal phenomenon; Just wait for weather becoming better, the machine will automatically recover and generate power again, please ignore this situation.
2. Disconnect both of the AC side and DC side switch, and unplug the Solar panel string from inverter one by one, to check if the positive and negative of each string is wrong or opposite, and test if each string voltage is within inverter rated range. If the DC connection is correct, please restart the inverter and observe whether the inverter can normally return to work.
3. Check if the inverter running mode is set correctly.
4. To exchange the 2 MPPT panel string and keep a further observation.
1. Check if the panel DC voltage is In the rated range and be connected correctly.
2. Turn off the inverter (Disconnect DC and AC), after 5 minutes then turn it on, observe it and check if the inverter is able to return to normal. Check if the faulty will be repeated again.
1. Check what the phase voltage is and frequency is from the display, check if they are in the rated range.
2. Check if AC terminal and distribution box internal connection is correct, check if any connection is loose or disconnected, check if the breaker in the distribution box was tripped.
3. Use the multimeter to check if the grid connection is correct, and check if phase voltage and line voltage is too low
4. Check if the inverter's safety code be set correctly and Grid under-voltage protection point be set to match the actual situation.
5. Waiting for a while until grid voltage recovered, to observe on the inverter and check if it can automatically return to normal running.
1. Check what the phase voltage and frequency are on the display, check if they are in the rated range.
2. Use the multimeter to check if the grid connection is correct, and check if phase voltage and line voltage is too high
3. Check if the inverter’s safety code be set correctly and Grid under-voltage point be set to match the actual situation.
4. Waiting for a while until grid voltage recovered, to observe inverter and check if it can automatically return to normal running.
5. Check if the “N” and “PE” cable in the system is connected well and fully complied with standard requirements
1. Check what the displayed AC frequency value is, check if the value is in the rated range.
2. Check if the AC terminal and distribution box internal connection is correct, check if any connection is loose or disconnected, check if the breaker in the distribution box was tripped.
3. Use a multimeter to see if the grid wire connection is correct; check if the grid frequency is too low
4. Check if the inverter’s safety code be set correctly and Grid under-frequency point be set to match the actual situation.
5. Please Wait for a while until the grid frequency recovered, then check if the inverter can return to normal.
1. Check what the displayed AC frequency value is, check if the value is in the rated range.
2. Use a multimeter to check if the grid connection is correct, and check if the grid frequency is too high
3. check if the inverter’s safety code be set correctly and Grid over-frequency protection point is set to match the actual situation.
4. Please Wait for a while until the grid frequency recovered, then check if the inverter can return to normal
