Fan of indoor unit touches other 
positions 
Adjust fan position
Foreign articles inside the indoor unit
Remove foreign articles
Vibration of compressor is violent
Adjust support foot mat of 
compressor, tighten loose bolts 
Pipes of outdoor unit bump together
Separate bumping pipes
Metal plates bump together inside the
unit 
1. Tighten connection screws
2.  Attach vibration damping gum 
between metal plates 
Indoor fan bumps cabinet
Adjust fan position
Abnormal sound from inside compressor
Replace Compressor
Abnormal electromagnetic noise from
4-way valve when in heating operation
Internal short circuit of solenoid 
valve
, replace solenoid valve
Abnormal sound 
and vibration 
Block or breakage of drainage pipe
Replace drainage pipe
The refrigerant pipe joint is not 
wrapped firml
y 
Wrap and bind it again firmly
Water leakage