ACU Power Check Failure — Power or Connection Issue

What does ACU Power Check Fail mean?

This test verifies power flow to and from the Appliance Control Unit (ACU). Failure can indicate issues with the power cord, interference filter, or connections to the ACU.

• Faulty power cord
• Defective interference filter
• Loose or damaged harnesses/connections between filter and ACU
• No line voltage at the outlet

Click steps to track your progress.

1. 1

   Visually inspect all connections to the interference filter (IF) and ACU.

2. 2

   Check for line voltage at the input of the interference filter.

3. 3

   If voltage is present, check voltage at the output of the interference filter. If absent, replace the IF.

4. 4

   If voltage is present at the IF output, check voltage at the ACU input connector (J2 pins 1 and 2).

5. 5

   If voltage is absent at the ACU input, check harnesses and connections between the filter and ACU.

6. 6

   Verify the continuity of the power cord if no line voltage is present at the IF input.