Solar · Error codes
Huawei alarm 2062 Low Insulation Resistance - is my system unsafe?
Short answer
Alarm 2062 means the inverter measured a short or poor insulation between the PV array and earth, often from damp or damaged cabling. The inverter will not connect while it persists. FusionSolar shows the measured resistance and a possible fault position. Leave DC wiring alone and have your installer test the strings (SUN2000-L1 manual Issue 06, checked 24 September 2026).
Last checked 24 September 2026 · 1 source
In more detail
- Damp-weather-only alarms suggest moisture ingress.
- Installer checks PE cable and each string's impedance to ground.
The facts, dated
- 01Huawei: app shows 'Current insulation resistance: x MOhm, possible short circuit position: x%'.
manufacturer · UK · checked 24 September 2026 · solar.huawei.com
Sources
- solar.huawei.com — solar.huawei.com/-/media/Solar/attachment/pdf/au/service/residential/SUN2000-2-6…
Last checked: 24 September 2026