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Wattsonic AIO ESS | USER MANUAL
Wattsonic WTS 6~12kW series three-phase hybrid inverter is designed in accordance
with grid operation standard, and conform to the requirements of the 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 fault messages
will display 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
Solution
Mains Lost
1. Check whether the mains supply is lost.
2. Check whether the AC breaker and terminal are well connected.
Grid Voltage Fault
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 Frequency Fault
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
1. Restart the inverter.
2. Seek for help from the installer or manufacture.
ISO Over Limitation
1. Restart the inverter.
2. Check if the insulation of the wires in PV, battery, and AC is damaged.
3. Seek for help from the installer or manufacture.
GFCI Fault
1. Restart the inverter.
2. Check if the insulation of the wires in PV, battery, and AC is damaged.
3. Seek for help from the installer or manufacture.
PV Over Voltage
Reduce the number of PV panels to make sure the open-circuit voltage of
each string is lower than the inverter max allowed input voltage.
Bus Voltage Fault
1. Check whether the input voltage is over the limitation.
2. Seek for help from the installer or manufacture.
Inverter Over
Temperature
1. Check if the heat dissipation of the inverter is normal.
2. Seek for help from the installer or manufacture.
SPI Fault
1. Restart the inverter.
2. Seek for help from the installer or manufacture.
E2 Fault
1. Restart the inverter.
2. Seek for help from the installer or manufacture.
GFCI Device Fault
1. Restart the inverter.
2. Seek for help from the installer or manufacture.
Troubleshooting
Fault Messages