Daikin Air Conditioner Error UH

⚡ Quick Answer: The Daikin Air Conditioner UH error indicates a communication failure between the indoor and outdoor units, leading to a system shutdown for safety. T... ✅ DIY Fixable

What Does Error UH Mean?

The Daikin Air Conditioner UH error indicates a communication failure between the indoor and outdoor units, leading to a system shutdown for safety. This can occur due to a mismatch in unit models, faulty wiring, or control board issues. If you see this error, your AC will stop running, and the display may blink, indicating that proper communication is not established.

Common Symptoms:

  • AC stops running and displays UH error code
  • Communication between indoor and outdoor unit not established
  • System safety shutdown

Possible Causes

  • Mismatch between indoor and outdoor unit models/configuration (medium)
  • Faulty or misconnected communication wiring between indoor and outdoor units (medium)
  • Control board (indoor or outdoor) failure affecting communication/control (low)

How to Fix Error UH

DIY Fix Power cycle the air conditioner

  1. Turn off the AC using the remote or unit power button
  2. Switch off the dedicated AC breaker or unplug the unit
  3. Wait about 1 minute
  4. Restore power and attempt to restart

Technician Only Check and correct communication wiring and unit compatibility

  1. Inspect the communication cable between indoor and outdoor units for proper routing, secure connections, and continuity
  2. Verify that the indoor and outdoor units are compatible models/configured correctly
  3. Test or replace control boards if wiring and configuration are correct but the error persists
  4. Perform system test and confirm communication integrity before normal operation

Parts needed: communication wiring, indoor unit control board, outdoor unit control board

🛑 When to Call a Pro:
  • If UH error persists after power cycling
  • If there is visible damage to wiring or units
  • If incompatible unit models are suspected

Technical Specifications

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

Common Questions

What does UH error mean on Daikin Air Conditioner?

UH error indicates a communication failure between the indoor and outdoor units, causing the AC to stop running.

Can I fix Daikin Air Conditioner UH error myself?

Yes, you can try power cycling the AC. Turn it off, disconnect the power, wait a minute, then turn it back on.

How much does it cost to fix UH error?

Repair costs for the UH error typically range from ¥5,000 to ¥30,000+, depending on parts and labor.

When should I call a technician for UH?

Call a technician if the UH error persists after power cycling, if you see visible damage, or if unit compatibility is in question.

Data last verified: 2026-07-07

User Comments (0)

Share your experience or solution below.

Be the first to comment!