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1.
Common fault conditions: the temperature of the high greenhouse of the thermal shock test box is set to 60 degrees, and the temperature of the high greenhouse continues to rise after the temperature exceeds 60 degrees, which is not controlled by the control panel
.
Common fault analysis and inspection: When the temperature of the greenhouse exceeds the temperature set by the control board by 60 degrees, the control board does not have 20V AC voltage output during the heating operation, and the greenhouse does not have 20V at the control terminal of one of the three-phase electric intermediate relays.
AC voltage input, the input and output of the intermediate relay are in the normal state, indicating that the intermediate relay is thermally broken down; and then there is always electricity supply and demand to balance the heater of the greenhouse, so the temperature of the greenhouse will continue to rise
.
2.
Common fault conditions: Common fault conditions of the cold and thermal shock test chamber (ultra-low temperature storage laboratory): The temperature of the ultra-low temperature laboratory is set to -30 degrees, the machinery and equipment are operated, and when the CFA secondary refrigeration compressor starts for a period of time, the laboratory controls The 7th group alarm (alarm mark 2REF) appears on the board, and the machine equipment is shut down
.
Analysis and inspection of common faults: After the inspection route of the thermal shock test box, the seventh group of alarm 2REF appears on the control panel, which is a common fault of the CFA secondary refrigeration compressor of the laboratory refrigeration unit
.
During the inspection, it is necessary to check the method, and check the ultra-high pressure and low pressure, load, overcurrent, and low oil (all these types are connected to this alarm point) of the CFA secondary refrigeration compressor one by one.
If the alarm point for low oil is found to be cancelled, the machine After the equipment has been in operation for a period of time, there is no common fault condition; after watching the second set of refrigeration compressor sight glass, it is found that the amount of refrigeration oil is too low; and then the refrigeration oil is clearly charged
.
3.
Common fault conditions: Common fault conditions of the personal studio motor (ultra-low temperature storage laboratory) of the thermal shock test box: There are 4 studio motors in the ultra-low temperature laboratory, and two motors are found to be out of operation in this inspection of the equipment
.
After inspection, this personal studio motor is a non-standard American ge motor, and then it is enough to replace the motor
.
Common fault conditions: the temperature of the high greenhouse of the thermal shock test box is set to 60 degrees, and the temperature of the high greenhouse continues to rise after the temperature exceeds 60 degrees, which is not controlled by the control panel
.
Common fault analysis and inspection: When the temperature of the greenhouse exceeds the temperature set by the control board by 60 degrees, the control board does not have 20V AC voltage output during the heating operation, and the greenhouse does not have 20V at the control terminal of one of the three-phase electric intermediate relays.
AC voltage input, the input and output of the intermediate relay are in the normal state, indicating that the intermediate relay is thermally broken down; and then there is always electricity supply and demand to balance the heater of the greenhouse, so the temperature of the greenhouse will continue to rise
.
2.
Common fault conditions: Common fault conditions of the cold and thermal shock test chamber (ultra-low temperature storage laboratory): The temperature of the ultra-low temperature laboratory is set to -30 degrees, the machinery and equipment are operated, and when the CFA secondary refrigeration compressor starts for a period of time, the laboratory controls The 7th group alarm (alarm mark 2REF) appears on the board, and the machine equipment is shut down
.
Analysis and inspection of common faults: After the inspection route of the thermal shock test box, the seventh group of alarm 2REF appears on the control panel, which is a common fault of the CFA secondary refrigeration compressor of the laboratory refrigeration unit
.
During the inspection, it is necessary to check the method, and check the ultra-high pressure and low pressure, load, overcurrent, and low oil (all these types are connected to this alarm point) of the CFA secondary refrigeration compressor one by one.
If the alarm point for low oil is found to be cancelled, the machine After the equipment has been in operation for a period of time, there is no common fault condition; after watching the second set of refrigeration compressor sight glass, it is found that the amount of refrigeration oil is too low; and then the refrigeration oil is clearly charged
.
3.
Common fault conditions: Common fault conditions of the personal studio motor (ultra-low temperature storage laboratory) of the thermal shock test box: There are 4 studio motors in the ultra-low temperature laboratory, and two motors are found to be out of operation in this inspection of the equipment
.
After inspection, this personal studio motor is a non-standard American ge motor, and then it is enough to replace the motor
.
