Code 44 — Motor Communication Fault

What does 44 mean?

This error indicates a problem with communication between motors in the system. The ventilator, humidifier, dehumidifier, and outdoor unit will be turned off.

• Wiring issue in the communication bus (ABCD)
• Faulty motor control module
• Interference on the communication line

Click steps to track your progress.

1. 1

   Verify the ABCD wiring connections are secure and correct on all devices.

2. 2

   Check for any damage to the communication wires.

3. 3

   Ensure shielded wire is used if near high-voltage wiring.

4. 4

   Contact an HVAC technician for diagnosis.