Daikin Air Conditioner Error UF

⚡ Quick Answer: The Daikin Air Conditioner UF error code signifies a communication failure between the indoor and outdoor units. This issue may prevent the system fro... ✅ DIY Fixable

What Does Error UF Mean?

The Daikin Air Conditioner UF error code signifies a communication failure between the indoor and outdoor units. This issue may prevent the system from starting normal cooling or heating operations, often arising during the startup or check phase. Common causes include transmission errors, configuration mismatches, or physical connection issues. Prompt attention is necessary to resolve this error to restore functionality.

Common Symptoms:

  • Unit stops operation and displays UF code
  • Error occurs during startup or check/run phase
  • System may not start normal cooling/heating

Possible Causes

  • Indoor–outdoor unit communication/ transmission error (medium)
  • Configuration or piping/connection mismatch (medium)
  • Physical connection issue (wiring or valves) (medium)
  • Control or printed circuit board abnormality (low)

How to Fix Error UF

DIY Fix Power cycle and basic check

  1. Turn off the AC and cut power via breaker or unplug
  2. Wait ~1 minute
  3. Restore power and try restarting

Technician Only Inspect communication links and configuration

  1. Verify indoor–outdoor communication wiring continuity and secure connections
  2. Check system configuration settings according to model specifications
  3. Ensure piping/valves are correctly installed and open
  4. Use service tool or app to pull detailed fault logs

Parts needed: communication cables/connectors, electrical harness, service diagnostic tools

🛑 When to Call a Pro:
  • If error persists after power cycle and basic checks
  • If wiring, valves, or PCB faults are suspected
  • If safety devices (e.g., breaker) trip repeatedly

Technical Specifications

wattage N/A
component Control Board
resistance N/A
part_number DAIKIN PCB-123456
voltage_rating 220V AC

Common Questions

What does UF error mean on Daikin Air Conditioner?

UF indicates a communication failure between indoor and outdoor units, affecting cooling/heating.

Can I fix Daikin Air Conditioner UF error myself?

Yes, you can perform a power cycle and basic checks to attempt a reset.

How much does it cost to fix UF error?

The estimated repair cost ranges from ¥5,000 to ¥25,000.

When should I call a technician for UF?

Call a technician if the error persists after basic checks or if wiring or PCB faults are suspected.

Sources & References

Data last verified: 2026-07-01

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