9 | Troubleshooting
User reference guide
59
CVXM-A, FVXM-A, CVXM-A9, FVXM-A9, FVXTM-A
Split system air conditioners
4P625990-1D – 2022.09
System
Error code Description
Normal
Refrigerant shortage
Overvoltage detection
Transmission malfunction
Signal transmission error (between indoor and outdoor unit)
Indoor/outdoor unit combination fault
System malfunction
Indoor unit
Error code Description
Detection of refrigerant leak
(a)
Indoor unit PCB abnormality
Freeze-up protection or high-pressure control
Fan motor (DC motor) abnormality
Streamer unit error
Abnormality of refrigerant leakage sensor
(a)
Indoor heat exchanger thermistor abnormality
Room temperature thermistor abnormality
Humidity sensor error
(a)
Applicable for units with refrigerant leakage sensor only (CVXM-A9, FVXM-A9)
Outdoor unit
Error code Description
4-way valve abnormality
Outdoor unit PCB abnormality
Actuation of high pressure switch (HPS)
Overload activation (compressor overload)
Compressor lock
DC fan lock
Discharge pipe temperature control
High-pressure control (in cooling mode)
Compressor system sensor abnormality
Malfunction of high pressure switch (HPS)
Position sensor abnormality
DC voltage / current sensor abnormality
Outdoor temperature thermistor abnormality
Discharge pipe thermistor abnormality
Outdoor heat exchanger thermistor abnormality
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