November 29, 2019

Error List of Air Conditioning

Error List of Air Conditioning

System

UO-Scarcity of Refrigerant

Lack of refrigerant and refrigerant clogging (incorrect piping)
Faulty thermistor
Faulty Low Pressure Sensor
Faulty outdoor unit main PCB

U1-reverse phase,Open phase

Power supply reverse phase t phase open phase
Defective Outdoor Unit PCB (A1P)

U2-Malfunction Power supply or instantaneous power failure

Abnormal power supply voltage instantaneous power failure faulty main circuit wiring

U3-check operation Not executed or transmission error

The check operation is not executed.

U4-Malfunction Transmission between indoor and outdoor unit

Indoor-outdoor or outdoor-outdoor transmission wiring (F1 / F2) has short circuit, or incorrect wiring outdoor unit power supply is off
System address faulty indoor unit PCB does not match faulty outdoor unit PCB

U5-Malfunction Transmission between indoor unit and remote controller

Transmission error between indoor unit and remote controller
Connection of 2 main remote controllers (while using 2 remote controllers)
Faulty indoor unit PCB,Faulty remote controller PCB,Transmission error is caused by noise

U6-Malfunction Transmission between indoor units

Faulty wiring external factor (noise etc.) faulty indoor unit pcb

U7-malfunction Transmission between external units or external storage unit

Connection error of transmission wirings between external units and external control adapter for external unit Connection error of transmission wirings between external units
Defective Outdoor Unit PCB

U8-Malfunction Transmission between remote controllers

Transmission error between main and sub remote controller
Defective remote controller PCB connection between sub remote controllers

U9-malfunction Transmission (other system)

Transmission error between other indoor and outdoor units Defective electronic expansion valve of other indoor unit Defective indoor unit PCB of other indoor unit Improper connection of transmission wiring between indoor and outdoor unit

UA-Inappropriate Combination of indoor and outdoor units

Wrong model connection improper power supply wrong pcb connected faulty pcb

Uc malfunction Centralized control device address setting

Address duplication of centralized control equipment Defective indoor unit PCB

UE-Malfunction Transmission between indoor unit and centralized control device

The transmission error is cut between the centralized control device for installing the main control and the optional controllers for the indoor unit connector. (Or disconnection of connector for independent / joint use change switch).
Defective PCB faulty indoor unit PCB for central remote controller

UF-System Set yet

Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor units Failure to perform check operation
Faulty indoor unit PCB stop valve is not opened

UH-Malfunction system

Improper connection of transmission wires between indoor-outdoor units and outdoor-outdoor units faulty indoor unit PCB
Defective Outdoor Unit PCB

UJ-Malfunction Transmission (Accessory Device)

Faulty wiring of accessory equipment

M1-Malfunction Central remote Controller pcb
M8-malfunction The transfer Between optional Controllers for Centralized control
MA-Inappropriate Combination of Optional controller To centralize Control
MC-Address Repetition,Improper setting
60-External Security Device activated (heat recovery ventilator)

Function of external protection device faulty output signal wiring faulty control PCB

Others

61-PCB malfunction

62-Ozone Density Unusual Kickback-chelenham
63-Sensor error
64-fault Indoor air thermistor (heat recall ventilator)

Faulty connector contact faulty indoor air thermistor faulty control pcb

65-PROBLEM Outdoor air thermistor (heat recall ventilator)

Faulty connector contact faulty external air thermistor faulty control pcb

66-supply air route Closed
67-Exhaust air Route Closed
68-Dust Malfunction Collection unit (heat recall ventilator)
6A – Malfunction Damper System (Heat Recovery Ventilator)
6C-Replacement Humidification element
6E-Change Deodorant
6F – Simplified Remote controller malfunction (heat recall ventilator)
6H-open door switch (Heat recall ventilator)
6J – Change High Efficient filter
88-microcomputers Start
94-Malfunction of transmission(between heat reclaim ventilator and fan unit)