CodeRegistry
Brands
  1. Home
  2. Daikin
  3. FTXF-D
  4. Signal transmission error (between indoor and outdoor unit)
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

Signal transmission error (between indoor and outdoor unit)

Signal transmission error between indoor and outdoor unit

Daikin · FTXF-D

What does Signal transmission error (between indoor and outdoor unit) mean?

There is a communication problem between the indoor and outdoor units. This prevents the system from operating correctly.

Common Causes

  • Wiring issue
  • Interference
  • Faulty communication board

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure all wiring connections between the indoor and outdoor units are secure.

  2. 2

    Check for any potential sources of interference.

  3. 3

    Contact your installer for further diagnosis and repair.

Browse all codes in this manual (32)
Verified technical data. Last updated: April 2026

Related Faults

4-way valve abnormality4-way valve abnormalityBeepSingle beep - Setting changesBeep-beepTwo beeps - Operation starts
Source: Daikin FTXF-D
Open Manual (Page 12)Search more codes in this manual