Troubleshooting
60 / 79
LED status
Solutions
Neither the Power LED nor
the LCD screen lights up.
Turn off the external AC breaker.
Switch the DC switch to OFF position.
Check the PV input voltage and polarity.
The GRID LED is blinking.
Turn off the external AC breaker.
Switch the DC switch to OFF position.
Check if the grid voltage is normal.
Check if the cable connection of AC side
is correct and secure.
The RUN LED lights off or
FAULT LED lights up.
Refer to Table 8-2 for troubleshooting.
Table 7-2 Troubleshooting based on LED Lights
Common Fault and Troubleshooting
The inverter will be shut down automatically if the PV power generation system
fails, such as output short circuit, grid overvoltage/under voltage, grid over
frequency/under frequency, high environmental temperature or internal
malfunction of the machine. The fault information will be displayed on the APP
interface.
The issue can be identified and resolved based on the definitions, possible
causes and recommended solutions listed in the following table. There are
generally 3 types of fault: warning, protection and hardware fault. Proper analysis
is recommended before contacting after-sales service.
Types
Fault Codes
Solutions
Warning
Faults
CommErr
Definition:
Communication inside inverter fails
Possible causes:
Terminal block connecters of internal
communication wires have poor contact
Recommended solutions:
1.
Observe for 5 minutes and see whether the
alarm will be eliminated automatically;
2.
Switch off 3-phase working power supply
and then reboot the system;
3.
Contact after-sales service personnel.
ExtFanErr
Definition:
Cooling fan failure by visual check
Possible causes:
1.
Fan is blocked;
2.
Fan service life has expired;
3.
Fan socket connecter has poor contact.
