Huawei 2039 Overcurrent | Faisalabad, Lahore

Huawei SUN2000 shows Output Overcurrent (2039) or Output DC Component Overhigh (2040)

Short answer

Alarm 2039 means the inverter's output current briefly went too high, usually because the grid voltage dropped sharply or there was a short on the grid side. Alarm 2040 means too much DC component in the output current. Huawei says both recover automatically; if frequent, check for an output short circuit and contact support.

What you will see

2039 or 2040 in the alarm history
Short stops around grid disturbances

Why it happens

Sudden grid dips or faults nearby push output current up. 2040 can point to an inverter issue if it repeats.

Diagram

Grid disturbance, short stop

01Grid voltage drops sharply
02Output current spikes
032039 protection
04Inverter recovers when normal

2040 means too much DC in the output. Call if either repeats.

Huawei SUN2000 inverters; read the alarm ID and cause ID in FusionSolar.

What you can check yourself

Note if it happens with grid switching or storms

What not to do

Do not open the AC terminal cover

When to call us

Check AC output for short circuits
Raise a support case if frequent

Grid disturbances

Grid switching after load-shedding in Punjab can trigger these alarms. We check whether the fault is grid-side or inverter-side.

Send us

alarm history screenshots