This is a genuine Relay + Filter Board designed for Aurora / Power-One / ABB inverters with 3.6kW and 4.2kW output capacity. Identified by PCB marking 3G74-99-1 Pb-free, the board integrates key functions for DC input protection, grid relay switching, and power filtering.

🛠️ This board is known to resolve frequent inverter faults such as:
E013, E019, E023, E031, and Riso Low
(also displayed as 013, 019, 023, 031, Riso Low)

🔄 Condition: Used, professionally inspected and fully functional with original factory soldering.

📸 Visible Details from the Module:

🔹 Board Markings & ID:

• PCB Marking: 3G74-99-1 Pb-free
• Manufacturer: Power-One (before ABB acquisition)
• Model Code (sticker): 9F53G740D14 AD
• Serial Label Example: 239433

🔹 Key Components:

• Relays:
  • Zettler AZ2150-1A-12DEF (250VAC switching)
  • MEDER MN2 D12-1A85
• Capacitors:
  • ISKRA 900VDC / 275°C, marked KNB3114 B6
• DC Input Channels:
  • PV1, PV2, PV3, PV4 — with MOV varistors and protective diodes
• Connectors & Terminals:
  • BOOST1, BOOST2, GRP, +BULK, N.C, GP1, GP6
  • RS485, COMM interface ports
• Cooling:
  • Integrated cooling fan for thermal management
• Other Elements:
  • Ferrite core chokes and copper-wound inductors
  • Embedded grid switching relays and DC protection

🔹 Board Build & Condition:

• Factory soldering — no signs of rework or overheating
• Clean and professionally refurbished
• All terminals and traces are intact and fully operational

✅ Key Benefits:

✔ Solves inverter errors: E013 / 013, E019 / 019, E023 / 023, E031 / 031, Riso Low
✔ Provides DC input filtering, grid relay control, and surge protection
✔ Suitable for inverter restoration, servicing, or part replacement
✔ Robust design with fan-assisted cooling and overvoltage shielding

🔗 Compatibility:

✔ Aurora / ABB / Power-One inverters
• PVI-3.6-OUTD
• PVI-4.2-OUTD

📦 Includes: One Relay + Filter board with all mounted components and cooling fan
🏷️ Condition: Used & tested (refurbished)
⚖️ Weight: Approx. 1kg

🚀 Restore inverter performance and eliminate fault errors with this original ABB Aurora filter and relay board.