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Shinmatsu A certain customer regulation system Developmental electric compression line equipment line item officially introduced and used Description of main structure of air compressor Talking about the four uses of air compressor Talking about the scheme of applying SY4000 general frequency converter in compressor Can the compressor be repaired if it breaksReasons for refrigerator compressor not working
Reason one: Is the external power supply and compressor input voltage normal? Check whether the power supply and compressor input voltage meet the standard requirements (187 volts to 242 volts), whether the external power supply and compressor input voltage with a multimeter AC file are within this range, if it does not meet, you should take measures to adjust to the normal range within.
Cause two: The ambient temperature is too low ①When the ambient temperature is too low (1～10℃), if the refrigerator is in manual compensation mode, you need to open the compensation switch. If the magnetic temperature compensation switch, you need to check whether the magnetic switch is normal: because the ambient temperature is too low, especially for The refrigerator of the dual temperature single control refrigerator, as long as the compressor works for a short time, the refrigerator compartment reaches the predetermined temperature (1 ~ 10 ℃), and due to the low ambient temperature, the temperature of the refrigerator compartment rises slowly or not, the compressor is long The time does not work, the shutdown time is too long, and the temperature of the freezer is too high, which can not reach below -18 ℃. ②When the ambient temperature is lower than 0℃, the refrigerator should be stopped: because the ambient temperature is lower than 0℃, the compressor oil becomes thicker and the lubricating performance becomes worse; meanwhile, the condensing pressure becomes lower and the refrigerant will not flow into the evaporator. If you continue to use the refrigerator when it does not work properly, it may cause damage to the compressor.
Cause three: Whether the thermostat or the main control board is normal ① First check whether the thermostat is in the "0" position, if it is not in this position, then check whether the thermostat is normal: when the power is turned on, adjust the thermostat position to the strong cold gear (if there is no strong cold gear, adjust it) To 7th gear), if the temperature probe is in the box, you can also use a hot towel to heat the temperature probe to observe whether the compressor is running. If the compressor does not start, the thermostat may be faulty. At this time, the power can be cut off and the thermostat can be removed. Use a multimeter to measure whether the power contact and the compressor input contact are connected (the resistance value is zero, according to the thermostat model) , The corresponding contact of the parameter label measurement). If continuity is checked, check whether the temperature sensing tube of the thermostat is broken, cracked, leaked or leaked, and if so, the thermostat needs to be replaced.
②For the refrigerator of electronic control system, when the power is on, use a multimeter AC voltage block to measure whether the input voltage and output voltage of the main control board are normal, and whether the display shows that the compressor is working? Are the sensors normal? Are the contacts of the connectors normal? If the input terminal voltage is normal and the output terminal has no voltage, the main control board is faulty.
Reason four: PTC starter failure Use a multimeter ohm file to measure whether the resistance of the PTC starter's running jack and the start jack is normal (the normal resistance is between 16 and 50 ohms under normal conditions). If infinity or 0, the PTC starter is damaged and should be replaced. . Reason five: Overload protector failure Use the ammeter to measure whether the compressor starts and the running current is normal (starting current is generally about 5 to 8 times of the running current). If the current normal overload protector operates, the overload protector fails and should be replaced. Otherwise, the compressor is faulty.
Reason 6: Whether the compressor connection point is in good contact Check how the compressor PTC start protector is plugged in, and plug it in again to test it.
Reason 7: Internal fault of the compressor If the tested compressor accessories are normal, but the compressor still can not start, and the overload protector action (the starting current is too large at this time) is determined to be the compressor stuck cylinder or the compressor holds the shaft, the compressor needs to be replaced.
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