How do I fix error code AC3 on a Samsung washers?

1. undefined: 1. Check the wire connections and terminal contacts between the main and inverter PBAs 2. undefined: 2. Check for disconnected wires 3. undefined: 3. If the main or Inverter PBA communication circuit is faulty, replace it

Samsung Washers

Error Code AC3

The motor controller board cannot communicate with the main board

Critical

Stop using immediately - risk of damage or safety issue

Also displayed as: AC3

What This Means

DR communication error; Disconnected wires between main and inverter PBAs; Main or Inverter PBA communication circuit fault

What actually causes this:

A wiring connector between the main board and motor controller came loose

First Thing to Check

Unplug the washer for 60 seconds, then restart

Parts Involved

Main PBAInverter PBA

How to Fix

1
1. Check the wire connections and terminal contacts between the main and inverter PBAs
2
2. Check for disconnected wires
3
3. If the main or Inverter PBA communication circuit is faulty, replace it