Code 81-58 VFD System Lockout - Wiring Error

What does 81-58 mean?

The Variable Frequency Drive (VFD) senses that one or more compressor wires are not connected, making the system inoperable.

• Loose or disconnected compressor wire harness at either end.
• Damaged compressor wires.
• Open compressor windings.
• Problem within the VFD itself.

Click steps to track your progress.

1. 1

   Turn off power to the unit at the circuit breaker and wait 30 seconds before turning it back on.

2. 2

   Inspect the compressor wire harness at both the compressor and VFD ends, ensuring all connections are tight and secure.

3. 3

   Visually check the compressor wires for any signs of damage, cuts, or fraying.

4. 4

   If the fault persists, a professional should perform a continuity test on the harness and check compressor winding resistance.