Abnormal DC protection unit

What does 2088 mean?

This Major alarm indicates an issue with the DC protection unit. Possible causes include a fuse not being in position or blown, open-circuited relays on the breaking board, or stuck DC switch contact points. The specific action depends on the cause ID and PV indicator status.

• The fuse is not in position or is blown (Cause ID = 1).
• The two relays on the breaking board are open-circuited (Cause ID = 2).
• The contact points of the DC switches are stuck (Cause ID = 3).

Click steps to track your progress.

1. 1

   For Cause ID 1 or 2: Turn off the AC output switch and DC input switch, then turn them on after 5 minutes. Wait for the inverter to connect to the power grid.

2. 2

   For Cause ID 3 (if PV indicator LED1 is on): Wait until the PV string current decreases to below 0.5 A. Then turn off the AC output switch and then the DC input switch. After 5 minutes, turn on the AC output switch and the DC input switch. Wait until the inverter connects to the power grid.