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Troubleshooting
※ 10.1 Error Message
Wattsonic 4.0~20.0kW-3P series hybrid inverter is designed in accordance with grid
operation standards, and conform to the requirements of safety and EMC. The inverter had
passed a series of rigorous tests to ensure it runs sustainably and reliably before shipment.
When a fault occurs, the corresponding error message will be shown on the OLED display,
and in this case, the inverter might stop feeding into grid. The fault messages and their
corresponding troubleshooting methods are listed below:
Error Message
Description
Solution
Mains Lost
Grid power outage, AC switch or
cir¬cuit is disconnected.
1. Check whether the mains supply is lost.
2. Check whether
the AC breaker and
terminal are well
connected.
Grid overvoltage or undervoltage, the
grid voltage is higher or lower than
the set protection value.
1. Check whether the impendence of the
AC cable is too high to lead the grid voltage
increased. Change a thicker AC cable if it is.
2. Extend the voltage protection range if it
is allowed by the electricity company.
Grid Voltage Fault
Inverter detects that the gird voltage
exceeds the limit of selected safety
set range.
1. Check whether the AC cable is correct
and well
connected.
2. Change to another country with wider
protection
range if it's allowed by the local electricity
company.
DCI Fault
Inverter detects that the the direct
current injection value exceeds the
range.
1. Restart the inverter.
2. Seek for help from the installer or manu-
facture.
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