haier HRF-349NAA - Manual (Page 26)

Troubleshooting
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A slight sound may be heard when the
appliance is first started due to the
operation of the compressor and motor.
The sound will be lower and lower
gradually a short period later. Temperature of the appliance and
compressor will rise and the compressor
will run for comparatively longer periods
when the appliance is first started.
Flowing refrigerant and compressor may
produce a slight sound when the
compressor starts or ceases operation. The two sides of the external surface,
center traverse and rear condensor of the
appliance will be warm due to heat
radiation of the appliance.
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