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Commercial refrigeration refrigeration but noisy repairs
commercial refrigeration refrigeration but noisy repairs
commercial refrigeration refrigeration but noisy
1. Large compressor running noise phenomenon: the ratio of refrigeration, start-up and shutdown time is normal, but compressor n5 is normal Hum runs loudly. Failure analysis: commercial refrigeration is caused by resonance due to uneven placement, and the compressor's own noise exceeds the standard. Troubleshooting: Follow the steps below.
①Push or slightly tilt commercial refrigeration. If the noise drops to normal, reposition the commercial refrigeration.
②Lightly press the condenser, the compressor water box, and touch the capillary tube. If the noise drops significantly when you press a certain part, it means that the part is loose, and you can do it firmly.
③Unplug the power plug, bleed the refrigeration pipeline, weld the compressor exhaust and return pipe ports, and test the compressor with electricity. If the noise is still loud, replace the compressor.
[Note] The domestic commercial refrigeration noise should be lower than 52dB, and the compressor no-load noise lower than 42dB is normal. According to the national standard of Eucalyptus, commercial refrigeration noise measurement should be conducted in a silent room. It can't be done for the general maintenance department and can only be measured in the home. Turn on the measured value of the decibel meter at 1 meter from the ground and commercial refrigeration, which is the commercial refrigeration noise.
2. There is a very loud when the compressor is running. Failure phenomenon: the ratio of refrigeration, on and off time is normal, but the compressor makes a very loud when the compressor is running. Failure analysis: the suspension spring in the compressor falls off. Troubleshooting: Follow the steps below.
①Replace the compressor. You can also remove the commercial refrigeration compressor shell, hang the suspension spring, weld the shell and perform blow-through and seal inspection, then restore the compressor installation. Then replace the filter drier, evacuate the system, suppress, and check for leaks.
② Evacuate, add refrigerant, test machine, and seal.
3. The compressor is running with metal crashing sound. Trouble phenomenon: The ratio of refrigeration, on and off time is normal, but the compressor makes a metal crashing sound when it is running. Failure analysis: the compressor water box is not fixed well, or the external refrigeration pipeline collides. Troubleshooting: Follow the steps below.
①Adjust the water box, if the impact sound disappears, fix the water box again.
② Observe the external refrigeration pipeline, if there is any collision, separate it gently or place a piece of foam between the two.
4. When the new machine is turned on, the compressor emits squeaking . Fault phenomenon: The ratio of cooling, on and off time is normal, but the compressor emits squeaking when it is running. Failure analysis: The anti-vibration (for transportation) foam on the back of the compressor is not taken out. Troubleshooting: unplug the commercial refrigeration power plug, open the rear panel of the compressor, and take out the foam at the rear of the compressor.
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