FAQ
  • Q1: A001 Input UV:Input under voltage
  • Analysis: DC Input PV1 voltage low.  DC Input PV2 voltage low

    Solution:

    1. If it only happened in a bad weather (such as: in the evening or morning); but it’s normal at other times, so the failure probably be 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 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 be set correctly.

    4.To exchange the 2 MPPT panel string and keep a further observation.

  • Q2: A002 Bus UV:Bus Under voltage
  • Analysis:Inverter internal DC BUS voltage under range.

    Solution:

    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 inverter is able to return to normal. Check if the faulty will be repeated again.

  • Q3: A003 Grid UV:AC voltage under rated range
  • Analysis: Grid voltage too low

    Solution: 

    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 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 actual situation.

    5. Waiting for a while until grid voltage recovered, to observe on inverter and check if it can automatically return to normal running.

  • Q4: A004 Grid UV:AC voltage over range
  • Analysis: Grid voltage too high

    lSolution:

    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 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 actual situation.

    5. Waiting for a while until grid voltage recovered, to observe on inverter and check if it can automatically return to normal running.

  • Q5: A005 Grid UF:AC frequency under range
  • Analysis: Grid frequency too low

    Soluition:

    1. Check what the displayed AC frequency value is, check if the value is 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 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 actual situation.

    5. Please Wait for a while until the grid frequency recovered, then check if the inverter can return to normal

     

  • Q6: A006 Grid OF:AC frequency over range
  • Analysis: Grid frequency too high

    Solution:

    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 be set to match actual situation.

    4. Please Wait for a while until the grid frequency recovered, then check if the inverter can return to normal

  • Q7: A007 Clock Fail:clock incorrect
  • Analysis: The Inverter’s clock time be set to wrong or not set

    Solution:

    1. Check if the inverter’s clock be set correctly

    2. Re-set the inverter’s clock through HMI or monitoring, check if the alarm is repeated. 

  • Q8: A009 Cmd Shut:Shutdown manually
  • Analysis: Inverter be shut down manually through HMI or monitoring operation

    Solution:

    1. Check if the inverter is in manual shutdown status through HMI or background software. If in that case , Turn on the inverter through HMI, see if the inverter can return to works normally.

    2. Turn off the inverter(Disconnect DC and AC), after 5 minutes then turn it on, check if inverter is able to return to normal running, and Check if the faulty will be repeated again.

  • Q9: A030 Lost Box:Box lost connection
  • Analysis: The communication is faulty between combiner box and inverter

    Solution: Check if the RS485 cable connection between DC combiner box and inverter is correct, whether It is loose or disconnected.

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A total of 4 pages

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