Haier BD-478A service manual National standard for noise, Noise test

Answer: Normally speaking, freezer noise within the range of national standard is normal. But if there is continuous sound of metal contacting from compressor, please check and solve the problem in time.

12.7 National standard for noise

There are stipulations in Items 6.5.7.1 and 6.3.6.1.of GB/T 8059.3-1995.

12.7.1When freezer is running for freezing, there will be no obvious noise?

The noise of sound power level of freezer with the volume 250L and below, measuring according to the stipulations in item 6.3.6.1, will not greater than 52dB(A).

Sound power level noise of freezing freezer with fan

300L below	≤55dB(A)
300-400L(including 400L)	≤60dB(A)
401-500L(including 500L)	≤63dB(A)

MAINTENANCE SERVICE AND TROUBLE SHOOTING Maintenance Service and Trouble Shooting

12.7.2 Noise test

At the geometrical center of measuring field, put the freezing freezer onto an elastic base (5-6mm thick elastic rubber cushion). The freezer should be

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