122
String 3 Reverse
Huawei · SUN2000 8-28KTL Solar Inverter
What does 122 mean?
A warning indicating that the cables for PV string 3 were connected in reverse during the SUN2000 installation. This incorrect polarity can prevent power generation from this string or cause damage to the inverter if not corrected.
Common Causes
- The cables between PV string 3 were connected in reverse during SUN2000 installation.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check whether the cables for PV string 3 are correctly connected.
- 2
If they are connected in reverse, reconnect the cables with correct polarity.
Verified technical data. Last updated: March 2026
Related Faults
Source: Huawei SUN2000 8-28KTL Solar Inverter