6 Troubleshooting
If the Inverter is unable to work properly, please refer to the following instructions before
contacting your local service centre. If any problems arise, the red (FAULT) LED indicator on the
front panel will light up and the LCD screen will display relevant information. Please refer to the
following table for a list of error message and associated solutions.
1. Check the impedance between Ground and PV (+) & PV (-). The impedance
value must be greater than 100 kΩ. Ensure the inverter is earthed.
2. Contact local service office for help if the problem persists.
1. Not connect to the grid.
2. Check if the power grid is connected to cable.
3. Check the availability of power grid.
1. Check if the PV open circuit voltage is higher or too close to the maximum
input voltage or not.
2. If the problem persists when PV voltage is less than the maximum input
voltage, contact local service office for help.
1. The internal temperature is higher than normal value specified.
2. Reduce ambient temperature.
3. Move the inverter to a cool place.
4. If the problem still exists, contact local service office for help.
1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the peripheral AC
system.
3. When the problem is cleared, reconnect the PV panel and check the Inverter
status.
4. Contact local service office for help if the problem persists.
1. The PV Inverter will automatically restart within 5 minutes if the grid returns
to normal.
2. Ensure grid voltage conforms with the specification.
3. Ensure neutral (N) wire and PE wire are connected well.
4. Contact local service office for help if the problem persists.
1. Grid is not connected.
2. Check grid connection cables.
3. Check availability of grid.
Vac Failure
Fac Failure
Type of fault Troubleshooting
Ground I Failure
Isolation Failure
Over Temperature
PV Over Voltage
Utility Loss
System
Failure
Error code
13
14
15
16
17
19
20
21
22
23
30
31, 24
32, 26
Others
Error message
DC Injection High
Isolation Failure
Vac Failure
External Fan Failure
PV Over Voltage
Over Temperature
IFAN Fault
DC BUS HIGH
Ground I Failure
Utility Loss
REF 1.5V Failure
AC HCT Failure
GFCI Failure
Device Failure
Description
The DC component of AC current exceed
inverter's limit
Insulation Resistance between the ground
and the panel is too low
Grid voltage exceeds the inverter limit
External Failure
PV Array voltage exceeds the inverter limit
Over temperature on the case
Internal FAN Fault
BUS voltage is too high
Residual current protection
Grid disconnection/fault
1.5V reference voltage exceeds the limit
AC current sensor failure
Leakage current detection circuit Failure
Internal Device Failure
5.7 Special Adjustable Setpoints
The inverter has a field inwhich the user can set functions, such as trip points, trip times, recon-
nect times, and active and inactive QU and PU curves. It is adjustable by using special software.If
you need to use it, please contact with after sales.
To obtain manuals for using the software, you can download them from our official website or
contact after-sales.
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