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Convenience store commercial refrigeration relay troubleshooting
author: supermarket refrigerated showcase category: commercial refrigeration Views: 818Time: 2016-08-22
failure analysis: the possible reasons for the convenience store
commercial refrigeration not to start include compressor jam, motor winding burnout, overload protector open circuit, start relay failure, thermostat damage, etc. When checking, let the convenience store commercial refrigeration energize first, and use a clamp ammeter to measure whether the compressor's starting current and working current are normal. The measured starting current is above 5A, and then it returns to about 4A, but the compressor can start to run. This eliminates the overload protector. Use a multimeter to measure the resistance between the three terminals of the compressor. The measured resistance of the starting winding and the running winding is normal, and the insulation resistance between the winding and the casing is also greater than 2MQ. This also excludes the possibility of damage to the motor winding of the commercial refrigeration compressor in the convenience store.can be used to start the compressor to start operation, the compressor starts and runs smoothly, the operating current is about IA, and the convenience store commercial refrigeration begins to refrigerate, indicating that the compressor itself is not faulty, but the start relay has failed.
barrier repair: The convenience store commercial refrigeration uses a heavy hammer type starting relay. When you shake it by hand, you feel that the armature movement is somewhat blocked. Remove it, and carefully pour out the armature and moving contacts. It was found that the armature was blocked because of burrs on the frame of the starting relay. After removing the burrs with a knife, install the armature and moving contacts, reinstall the starting relay on the compressor, test the machine, and the convenience store commercial refrigeration resumes normal operation.
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