12 Trouble Shooting
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12 Trouble Shooting
When inverter does not operate normally, we recommend the following actions for quick troubleshooting. Please
review the error list table carefully.
12.1 Warning
The different LED colors and flashing status identify the current operation statuses of the inverter. If the red color is
always on, it indicates the inverter fault. Usually the warnings can be cleared through an orderly shutdown / reset or a
self-corrective action performed by the inverter.
12.2 Errors
Error codes identify a possible equipment fault, or incorrect setting/ configuration. Any and all attempts to correct or
clear a fault must be performed by qualified personnel. Typically, the Errors code can be cleared once the cause or
fault is removed.
However, some of the (E) codes may cannot be cleared, in this case please contact the dealer or Canadian Solar to
replace a new one.
Errors as indicated in the table below:
Error Code
Error Message
Suggestion
F-100
Over temperature
1. Check heatsink for obstructions/ventilation.
2. Check the ambient temperature around the inverter.
F-101
High DC input voltage
1. Disconnect the DC switch, remove the DC connector, measure the voltage of the PV string, and
check if it exceeds the input-voltage specification of the inverter.
2. If exceed the specification, re-layout the PV module string.
3. If not exceed the specification, while the error still exits, please contact Customer Service.
F-103
Unconnected grid
1. Turn off DC switch, remove AC connector, measure the voltage between fire line and the zero
line, then check if it is consistent with the grid-connected specification of inverter.
2. Inconsistent, check if the AC main switch is connected, check if the power supply is normal
working.
3. Consistent, connect the AC connector, turn on the DC Switch.
4. If error message still exists, contact Customer service.
F-104
Inverter grid-connected
relay fault
Contact Customer service.
F-105
Grid frequency fault
1. If power grid frequency returns to normal, the inverter will restore the grid connection
automatically.
2. If error message still exists, contact Customer service.
F-106
Grid voltage fault
1. Turn off DC switch, remove AC connector, measure the voltage between fire line and the zero
line, then check if it is consistent with the grid-connected specification of inverter.
2. Inconsistent, check the grid layout.
3. Consistent, connect the AC connector, turn on DC Switch, inverter will restore the grid
connection automatically.
4. If error message still exists, contact Customer service.
F-107
DC component over range
1. Restart inverter.
2. If error message still exists, contact Customer service.
F-108
Current sensor fault
1. Wait until inverter restores normal work.
2. If error message still exists, contact Customer service.
F-110
Leakage current detection
unit fault
1. Check if there is any PV cable breakage.
2. Check if the PV modules grounding improperly.
3. Restart inverter.
4. If error message still exists, contact Customer service.
F-111
Leakage current fault
1. Check if PV strings grounding properly.
2. If error message still exists, contact Customer service.
