FAQ
How to solve 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.
How to solve 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.
How to solve 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.
How to solve Input voltage too high?
Analysis: DC input voltage is too high
Solution:
1. Turn off the DC & AC Switch, and disconnect the DC solar string one by one, then, use the multimeter to check if the polarity direction and voltage of each string is correct, make sure it is in the rated range.
2. Restart inverter( by disconnect DC&AC switch, wait for 5 mins, then turn it on), observe if it can return to normal running.
How to solve Boost faulty?
Analysis: Inverter has faulty on Boost circuit
Solution:
1. If it only happened in a bad weather(such as: in the evening or morning); but other times are normal, so the problem probably be caused by the insufficient input power, it’s a normal phenomenon; please wait for weather becoming better, the machine will automatically recover and generate power again, please ignore this situation.
2. Check if the inverter’s DC side connection is correct, check if the DC voltage is in rated range
3. Restart inverter (disconnect DC&AC switch, wait for 5 mins, then turn it on), observe if it can return to normal running.
How to solve fan faulty?
Analysis: Inverter internal FAN is faulty
Solution:
1. Inspect if the FAN cover plate is deformed
2. Observe if the FAN can normally running( judge it by hearing the running sound or use a hand to feel the wind status)
3. Disconnect the both of AC and DC side switch, after 5 minutes, to check if the FAN connection wire is loose
4. Replace the faulty fan, and observe if inverter can return to normal
Where are your offices located ?
CNBM International located in 65 Beverly West, Msasa, Harare. It also can navigate “CNBM international “ through google map.
Does the price include VAT and CNBM will provide with official invoice ?
Yes, the selling price include the 15% VAT ,and we will provide fiscal invoice accordingly.