Daikin FDA125A5VEB - Symptom: Noise of Air Conditioners (Indoor Unit, Outdoor Unit); Symptom: Dust Comes out of the Unit; Symptom: the Units Can Give off Odours

11 | Troubleshooting
Installer and user reference guide
40
FDA125A5VEB
Split system air conditioners
4P495031-1B – 2022.10
11.1.6 Symptom: Noise of air conditioners (Indoor unit, outdoor unit)
▪ A continuous low hissing sound is heard when the system is in cooling or defrost
operation. This is the sound of refrigerant gas flowing through both indoor and
outdoor units.
▪ A hissing sound which is heard at the start or immediately after stopping
operation or defrost operation. This is the noise of refrigerant caused by flow
stop or flow change.
11.1.7 Symptom: Dust comes out of the unit
When the unit is used for the first time in a long time. This is because dust has
gotten into the unit.
11.1.8 Symptom: The units can give off odours
The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it
again.