8. Maintenance
.49.
.48.
6. Disconnect the fan connector carefully and take out the fan.
7. Clean or replace the fan. Assemble the fan on the rack.
8. Connect the electrical wire and reinstall the fan assembly Restart the inverter
.
.
8.2 Fan Maintenance
If the fan does not work properly, the inverter will not be cooled effectively.
and it may affect the effective operation of the inverter .
Therefore, it is necessary to clean or replace a broken fan as follows:
1. Turn off the “Grid ON/OFF” switch on the inverter LCD.
2. Disconnect the AC power.
3. Turn the DC switch to "OFF" position.
4. Wait for 15 minutes at least.
5. Remove the 4 screws on the fan plate and pull out the fan assembly slowly.
Figure 8.2
NOTE:
If you need to maintain the inverter at night, please turn off the AC switch first,
then turn off the DC switch, and wait 5 minutes before you do other operations.
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
OV-G-V01/02/03/04
OV-G-F01/02
UN-G-F01/02
G-IMP
NO GRID
-
OV DC
-
01/02/03/04
OV BUS
-
UN BUS
-
01/02
GRID INTF
-
01/02
OV TEM
-
Failure description
Over grid voltage
Under grid voltage
Over grid frequency
Under grid frequency
High grid impedance
No grid voltage
Over
voltage
DC
Over
bus voltage
DC
Under
bus voltage
DC
Grid interference
Over Temperature
Solution
1.Resistant of
cable is too high.
AC
Change bigger size grid cable
2.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.Restart inverter
2.Change power board
1.Check
input connections
PV
2.Check
input voltage
DC
(single phase >120V, three phase >350V)
3.Check if
+/ is reversed
PV
-
Inverter no power
on LCD
No power
LCD show initializing
all the time
Can not start-up
1.Check if the connector on main
board or power board are fixed.
2.Check if the
connector to
DSP
power board are fixed.
1.Check inverter surrounding ventilation.
2.Check if there’s sunshine direct on
inverter in hot weather.
1.Use user define function to adjust the
protection limit if it’s allowed by
electrical company.
1.Check inverter inductor connection
2.Check driver connection
UN-G-V01/02
DC INTF
-
DC input overcurrent
1.Restart inverter
2.Identify and remove the string to the fault MPPT
2.Change power board
IGFOL-F
Grid current tracking fail
OV-G-I
Over grid current
OV DCA
-
-I
IGBT OV
-
-I
Over
current
IGBT
1.Restart inverter or contact installer.
IG AD
-
Grid current sampling fail
9. Troubleshooting