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)
Error List of Air Conditioning Next Page
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