Sharp KD-NHA8S6GW21-EN User Manual page 28

7. MACHINE SOUND
SOURCE OF SOUND DEFINITION
Pump Sound
Pump is activated when the machine starts
to work and during the operation at certain
intervals. It is normal to hear pump and
water sound during this process.
Compressor Sound
It is normal to hear a metallic sound from
the compressor from time to time while the
machine is running.
EN - 24