Canadian Solar Three Phase Inverter does not require any regular maintenance. However,
cleaning the dust on heat-sink will help the inverter to dissipate the heat and increase its life
time. The dust can be removed with a soft brush.
CAUTION:
Do not touch the inverter's surface when it is operating. Some parts of the
inverter may be hot and cause burns. Turn off the inverter (refer to Section
6.2) and wait for a cool-down period before before any maintenance or
cleaning operation.
The LCD and the LED status indicator lights can be cleaned with a damp cloth if they are too
dirty to be read.
NOTE:
Never use any solvents, abrasives or corrosive materials to clean the inverter.
8. Maintenance
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:
9. Troubleshooting
9. Troubleshooting
Alarm Message
OV-G-V01/02/03/04
OV-G-F01/02
UN-G-F01/02
G-IMP
NO-GRID
OV-DC01/02/03/04
OV-BUS
UN-BUS01/02
GRID-INTF01/02
OV-TEM
Failure description
Over grid voltage
Under grid voltage
Over grid frequency
Under grid frequency
High grid impedance
No grid voltage
Over DC voltage
Over DC bus voltage
Under DC bus voltage
Grid interference
Over Temperature
Solution
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. 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 PV input connections.
2. Check DC input voltage.
(single phase >120V, three phase >350V)
3. Check if PV+/
-
is reversed.
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 DSP connector to
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
.
3. Change power board.
IGFOL-F
Grid current tracking fail
OV-G-I
Over grid current
OV-DCA-I
IGBT-OV-I
Over IGBT current
1.Restart inverter or contact installer.
IG-AD
Grid current sampling fail
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.
PV ISO-PRO
01/02
PV isolation protection
INI-FAULT
Initialization system fault
1. Restart inverter or contact installer.
12Power-FAULT
12V power supply fault
DSP-B-FAULT
Comm. failure between main
and slave DSP
.39.
.38.
