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7. Normal operation
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 7.40 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:
Restart Press ESC 3s
Figure 7.41 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.
.58.
ON
OFF
ARC-FAULT
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 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.
8.1 Night Time PID-Recovery Function
Canadian Solar Three phase Inverters integrates optional Night Time PID-Recovery module
and it can recover the PID effect during night thus protect the PV system from degradation.
PV+
PV-
The Night Time PID-Recovery module repairs the PID effect of the PV model at night.
When operating, the inverter LCD screen displays " PID-repairing " information, and the
red light is on. The Night Time PID-Recovery function is always ON when AC is applied.
If maintenance is required and turn off the AC switch can disable the Night Time PID-Recovery
function.
WARNING :
Due to the similar functional logic, when the night time PID-Recovery function
is integrated, the night time var compensation function can not be used.
Also, the negative grounding option is not available for inverters with night
time PID-Recovery function.
8. Maintenance
Inverter
U
V
W
V+
PID
GND
Figure 8.1
.59.
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