Table of Contents
Advertisement
9. Troubleshooting
The inverter is designed in accordance with the most important international grid-tied
standards and safety and electromagnetic compatibility requirements. Before delivering to
the customer, the inverter has been subjected to several tests to ensure its optimal operation
and reliability.
In case of failure, the LCD screen will display an alarm message. In this case, the inverter
may stop feeding into the grid. The failure descriptions and their corresponding alarm
messages are listed in Table 9.1:
Alarm Message
Failure description
Inverter no power
No power
on LCD
LCD show initializing
Can not start-up
all the time
OV-G-V01/02/03/04
Over grid voltage
Under grid voltage
UN-G-V01/02
Over grid frequency
OV-G-F01/02
UN-G-F01/02
Under grid frequency
High grid impedance
G-IMP
No grid voltage
NO-GRID
Over DC voltage
OV-DC01/02/03/04
Over DC bus voltage
OV-BUS
Under DC bus voltage
UN-BUS01/02
GRID-INTF01/02
Grid interference
Over grid current
OV-G-I
IGBT-OV-I
Over IGBT current
DC-INTF
DC input overcurrent
OV-DCA-I
Grid current tracking fail
IGFOL-F
Grid current sampling fail
IG-AD
Over Temperature
OV-TEM
.60.
Solution
1.Check PV input connections
2.Check if the DC input voltage higher
than 620V
3.Check if PV+/- is reversed
1.Check if the connector on main
board or power board are fixed.
2.Check if the DSP connector to
power board are fixed.
1.Resistant of AC cable is too high.
Change bigger size grid cable
2.Adjust the protection limit if it's
allowed by electrical company.
1.Use user define function to adjust the
protection limit if it's allowed by
electrical company.
1.Check connections and grid switch.
2.Check the grid voltage inside inverter
terminal.
1.Reduce the module number in series
1.Check inverter inductor connection
2.Check driver connection
1.Restart inverter
2.Change power board
1.Restart inverter
2.Identify and remove the string to the fault MPPT
2.Change power board
1.Restart inverter or contact installer.
1.Check inverter surrounding ventilation.
2.Check if there's sunshine direct on
inverter in hot weather.
9. Troubleshooting
Alarm Message
Failure description
Initialization system fault
INI-FAULT
Comm. failure between main
DSP-B-FAULT
and slave DSP
12Power-FAULT
12V power supply fault
PV ISO-PRO
PV isolation protection
01/02
ILeak-PRO
Leakage current protection
01/02/03/04
Relay check fail
RelayChk-FAIL
DCinj-FAULT
High DC injection current
AFCI self-detection
(model with AFCI
AFCI module self-detect fault
module)
Arcing protection
(model with AFCI
Detect arc in DC circuit
module)
One of the DC string is
Reve-DC
reversely connected
Screen OFF
Inverter internally damaged
with DC applied
Table 9.1 Fault message and description
Solution
1.Restart inverter or contact installer.
1.Remove all DC input, reconnect and
restart inverter one by one.
2.Identify which string cause the fault and
check the isolation of the string.
1.Check AC and DC connection
2.Check inverter inside cable connection.
1.Restart inverter or contact installer.
1.Restart inverter or connect technician.
1. Check inverter connection whether arc
exists and restart inverter.
1. Please check the inverters' PV string polarity,
if there are strings reversely connected wait for
the night when the solar irradiance is low and the
PV string current down below 0.5A. Turn off the
two DC switchs and fix the polarity issue.
1.Do not turn off the DC switches as it will
damage the inverter.
2.Please wait for the solar irradiance reduces
and confirm the string current is less than
0.5A with a clip-on ammeter and then turn
off the DC switches.
3.Please note that any damages due to wrong
operations are not covered in the device
warranty.
.61.
Advertisement
Table of Contents
