Heat Pump, Split System, Single Service, 3 phase
Maintenance Document 1394-1 51
Clear 39: Abnormal noise
Probable causes:
• Abnormal installation (outdoor)
• Fan failure
• Compressor failure.
Checks:
1. The noise comes from the outdoor unit:
- Is the unit stable?
- Is the protection screen properly mounted?
- Is the propeller broken or distorted?
- Has the propeller screw been lost?
- Is any object blocking the propeller rotation?
OK
- Check for any vibration noise caused by a
bolt.
- Check for any sound of contact with a pipe.
OK
- Is the compressor locked?
OK
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