Sungrow SG30CX User Manual page 90

9 Troubleshooting and Maintenance
F F a a u u l l t t c c o o d d e e
37
43
39
80
F F a a u u l l t t n n a a m m e e
Excessively High Am-
bient Temperature
Excessively Low Ambi-
ent Temperature
Low System Insulation
Resistance
C C o o r r r r e e c c t t i i v v e e m m e e a a s s u u r r e e s s
Generally, the inverter will resume operation
when the internal or module temperature re-
turns to normal. If the fault persists:
1. Check whether the ambient temperature
of the inverter is too high;
2. Check whether the inverter is in a well-
ventilated place;
3. Check whether the inverter is exposed to
direct sunlight. Shield it if so;
4. Check whether the fan is running properly.
Replace the fan if not;
5. Contact Sungrow Power Customer Serv-
ice if the fault is due to other causes and the
fault persists.
Stop and disconnect the inverter. Restart
the inverter when the ambient temperature
rises within the operation temperature range.
Wait for the inverter to return to normal. If
the fault occurs repeatedly:
1. Check whether the ISO resistance protec-
tion value is excessively high via the app or
the LCD, and ensure that it complies with
the local regulations.
2. Check the resistance to ground of the
string and DC cable. Take corrective meas-
ures in case of short circuit or damaged in-
sulation layer.
3. If the cable is normal and the fault occurs
on rainy days, check it again when the
weather turns fine.
4. Contact Sungrow Customer Service if the
preceding causes are ruled out and the fault
persists.
User Manual