AC300 Alarm 008 OCP - hardware

My Bluetti AC300 has an alarm when I switch on AC. This started happening when I used Transfer Switch Box (as ATS controller). The ATS was designed to use main or generator power with the AC300 as a standby. Testing the switch worked fine: that when the generator power was switched off, the Battery power kicked in powering the house. After several attempts, the AC300 indicated the alarm 008 OCP. I followed few of the recommended steps to troubleshoot and/or fix the error but has not restored the functionality.

  1. Cleared the alarm and rebooted the system several times.
  2. Switched on AC with loads connected; Switched on AC with loads disconnected.
  3. Connected to Power Source with no loads.
  4. Connected to Power source with loads.

I have seen some discussion on this same topic and have noted that the AC300 unit need to be replaced. Is there any one who has found a fix instead of turning the unit in for repair or replacement? I’d appreciate any advise or feedback.

Hi @JamesR

welcome to the bluetti community forum!

There are multiple threads in this forum already, regarding the same topic.

Maybe you can find something in one of the both threads.

greetings
Erik

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Hi @JamesR , I agree with @Selfmadestrom 's opinion, please click the link he provided for reference.
When the distribution box is installed, the N line (meaning the utility N line and the machine out N line) cannot be screwed together.
Meanwhile, please try to reduce the AC input current. I hope it does help.
If not, please contact our customer service team to get support.

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