9 | Troubleshooting
User reference guide
55
CVXM20+FVXM25~50A2V1B
Split system air conditioners
4P625990-1A – 2020.10
9.2.10 Symptom: The outdoor fan rotates while the air conditioner is not in operation
▪ After operation has stopped. The outdoor fan continues to rotate for another
30 seconds for system protection.
▪ While the air conditioner is not in operation. When the outdoor temperature is
very high, the outdoor fan starts to rotate for system protection.
9.2.11 Symptom: Fan speed does not correspond with the setpoint
▪ During cooling operation in Multi system, the indoor unit may change the fan
speed to high, regardless of the user setting, in order to defrost the indoor unit
heat exchanger.
▪ During Indoor unit quiet operation, when both outdoor and indoor ambient
temperature is very high, the indoor unit increases the fan speed to protect the
system.
9.3 Solving problems based on error codes
Fault diagnosis by user interface
If the unit runs into a problem, you can identify the fault by checking the error
code by the user interface. It is important to understand the problem and take
measures before resetting the error code. This should be done by a licensed
installer or your local dealer.
INFORMATION
See the service manual for:
▪ The complete list of error codes
▪ A more detailed troubleshooting guideline for each error
To check the error code by the user interface
1 Aim the user interface at the unit and press for about 5seconds.
Result: blinks in the temperature setting display section.
2 Aim the user interface at the unit and press repeatedly until a
continuous beep is heard.
Result: The code is now displayed on the display.
INFORMATION
▪ A short beep and 2 consecutive beeps indicate non-corresponding codes.
▪ To cancel the code display, hold for 5 seconds. The code will also
disappear from the display if the button is NOT pressed within 1minute.
System
Error code Description
Normal
Refrigerant shortage
Overvoltage detection
Transmission malfunction
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