Daikin R42NUY2S - Equipment Produces Loud Noise or Vibration

Symptom-based Troubleshooting Si20-701_B
49
2.9 Equipment Produces Loud
Noise or Vibration
Applicable Model
All models of SkyAir series
Supposed Causes
 Improper installation
 Contacts of fan, piping, casing, etc.
 Noise of refrigerant flow
 Operating noise of drain discharge equipment
 Noise of resin components contracting
∗ In addition, the following errors may be conceivable
• Refrigerant overcharge
• Air interfusion
• Flash noise of insufficient refrigerant (hushing
noise)