Outdoor Unit LED 9 Flashes — Transistor PCB error

What does 9 Flashes (Outdoor Unit) mean?

The LED on the outdoor unit flashes nine times. This indicates an error with the Transistor Printed Circuit Board (PCB), which is typically part of the inverter module controlling the compressor.

• Failure of the transistor PCB components.
• Power surge or electrical fault damaging the PCB.
• Overload or short circuit condition affecting the transistors.

Click steps to track your progress.

1. 1

   Power cycle the entire heat pump system by turning off the main breaker for 60 seconds, then switching it back on.

2. 2

   Ensure stable power supply to the outdoor unit, free from fluctuations.

3. 3

   If the error persists, contact a qualified technician immediately, as a Transistor PCB error usually requires professional diagnosis and replacement.