Quattro - all LEDs on, dead otherwise, no comms

Q&A and troubleshooting
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1

Hi all. Quattro 12/3000/120, small microprocessor running firmware 1931125, nothing connected to the ve.bus ports, no remote switch, jumper is in place.

Quattro was working fine, I diagnosed a failing output circuit breaker in the Victron iso trans supplying it which was opening under heavy load. The breaker arced on reset during troubleshooting.

After the breaker arced, the Quattro now doesn’t boot - as soon as it’s switched to On or Charger Only, all 8 LEDs come on solid, which isn’t a recognised fault code. Sometimes, all except Inverter On LEDs come on but 9 out of 10 power cycles, all 8 are on. This only happens on DC, on AC only it’s completely dead.

It doesn’t connect to VEconfig at all. VEflash recognises the Quattro is turned on, prompts for a reset (power the Quattro off then on again) but after that it comes up with the dreaded ‘could not connect, please try again’ message.

Other steps I’ve tried:

  • Disconnecting AC and DC inputs, waiting 5 minutes, reconnecting DC.
  • Reseating all ribbon connectors
  • Disconnecting external temperature sensor
  • Checking DC input - this is within range at 12.7v.
  • Disconnecting all AC cables

Guessing the transient from the arc has fried something inside, I’ve never seen this before! Any other suggestions? Thanks.

2

Yeah. Something fried.
Its an old model? Possible some aged component couldn’t take the pressure.

3

Yep, it’s an older model, old microprocessor with 19 firmware, built around 13 years ago. Shame, was working fine until the faulty breaker on the iso trans took it out!

4

It sucks definitely.
Thats not to say you wont find help for it of you try with repair centres.

5

Yep, trying a few centres today. Customer is selling the boat and needs it working asap so it might end up being a replacement though.

As far as I know, the Quattro is one of the few inverter/chargers which Victron sell replacement boards for as it’s modular inside, unlike the MPII. I expect it’s the input board at the bottom that’s gone as it’s not passing power through to the mainboard at all when AC is connected.

Thanks!