U5

Malfunction of Transmission Between Main and Inverter PCB

Description

There is a malfunction in transmission between main and inverter PCB.

Appliance Error Codes Details

Error Code
U5
Error Name
Malfunction of Transmission Between Main and Inverter PCB
Appliance Type
air_conditioner
Brand
Daikin
Severity
high

Additional Troubleshooting

1. Reset the system
2. Contact service for PCB check

Was this helpful?

Loading...

Send Feedback

Found an error or have a suggestion? We respond within 48 hours.

About this page

Author: Pavel Volkov
Created:

Learn More

Dive deeper with our comprehensive developer guides for Appliance Error Codes

Appliance Error Codes: Troubleshooting Guide

Fix your home appliances with our comprehensive troubleshooting guide. Learn to identify error codes...

Pavel Volkov Aug 30, 2025
View all guides

Related Codes

More codes of the same type

U0

Zero Crossing Detection Error

The zero crossing detection circuit is malfunctioning.

View details →

U1

Reverse Phase

The power supply phases are reversed.

View details →

U2

Power Supply Voltage Drop Error

The power supply voltage has dropped abnormally.

View details →

U4

Malfunction of Transmission Between Control and Inverter PCB

There is a malfunction in transmission between control and inverter PCB.

View details →

U8

Malfunction of Outdoor Temperature Sensor

The outdoor temperature sensor is malfunctioning.

View details →

U9

Malfunction of Discharge Pipe Temperature Sensor

The discharge pipe temperature sensor is malfunctioning.

View details →

UA

Combination Error

Incorrect combination of indoor and outdoor units.

View details →

UF

Wiring/Piping Mismatch

The wiring and piping do not match the system configuration.

View details →
Back to Appliance Error Codes