Afci Function - CanadianSolar CSI Manual

7. Operation
7.5.16 I/V Curve
This function is used to scan the I/V characteristic curves of each PV strings.
Set I/V Curve
I/V Curve Scan
Figure 7.23 I/V Curve
7.5.16.1 Set I/V Curve
This setting can set the scanning voltage start point and the voltage interval.
Figure 7.24 Set I/V Curve
Start_V: The start voltage of the I/V scan. (Adjustable from 300V-1000V)
Interval_V: The scanning voltage interval.(Adjustable from 1-100V)
In total, 60 data points can be scanned.
7.5.16.2 I/V Curve Scan
Press "ENT" to start the I/V curve scan.
Figure 7.25 I/V Curve Scan (1)
After it is completed, the screen will display "Scan OK" and then enter the following section.
Select String No.: 01
Figure 7.26 I/V Curve Scan (2)
Figure 7.27 I/V Curve Scan (3)
.36.
850V
010V
Scanning...01
9.56A
9.44A

7.6 AFCI function

Canadian Solar inverters have the built-in AFCI function which can detect the arc fault on the
DC circuit and shut down the inverter to prevent a fire disaster.
7.6.1 Enable the AFCI function
The AFCI function can be enabled in the following.
Path: Advanced Setting -> Password: 0010 ->Special Settings -> AFCI Set ->
AFCI ON/OFF -> ON
AFCI ON/OFF
AFCI Level
Figure 7.28 Set AFCI
Warning:
The "AFCI Level" is reserved for Canadian Solar technicians ONLY.
Do not change the sensitivity otherwise it will lead to frequent false alarms or
malfunctions. Canadian Solar is not responsible for any further damages
caused by unauthorized modifications.
NOTE:
The setting corresponds to the current status as well which can be used to
inspect the ON/OFF state of the AFCI function.
7.6.2 Arc Fault
During the normal operation, if an DC arc is detected, the inverter will shut down
and give out the following alarm:
ARC-FAULT
Restart Press ESC 3s
Figure 7.29 Arc Fault
Installer needs to thoroughly inspect the DC circuit to ensure all the cables are
correctly fastened.
Once the DC circuit issue has been fixed or it is confirmed to be OK, press "ESC" for
3s and wait for the inverter to restart.
7. Operation
ON
OFF
.37.