PCB Care

Blue Star U5 Error Code

AC Current Detect Circuit Malfunction.

ac
AC Current Detect Circuit Malfunction

Cause: Current detection circuit on PCB faulty

How to fix: Check current sensor/shunt resistor on outdoor PCB, replace PCB if faulty.

Blue Star boards that may fix U5

If the board is the cause, these refurbished Blue Star boards are in stock. Match the part number before you order.

Other Blue Star codes

b5b7C5E0E1E2E4E5E6E8ECEE