Qingdao ‌ open screw chiller system common faults

‌ screw chiller common fault causes quick investigation

1The reason for the unstable fluctuation of oil pressure difference and the low pressure alarm shutdown？
A, less oil;(Low level or false level)
B, coarse filter failure;(filter plug)
C, oil pump failure;(Lack of oil supply due to wear or damage of rotor)
D, fine filter pressure difference;(Fine filter plugging pressure difference is large)
E, see if the pressure sensor is faulty;(injection pressure and exhaust pressure)
F, oil pressure regulator valve failure;(Adjust the pressure regulator according to pressure difference 1.5-3.0Mpa)
2、Evaporator cold scale will have what phenomenon？
A, low suction temperature;
B, low inspiratory pressure;
C, refrigeration efficiency decline;
3、  What will happen to condenser scaling？
A, high exhaust pressure;
B, high exhaust temperature;
C, the condensed ammonia liquid (fluorine liquid) temperature is high;
4、  The reason why there is much oil in the evaporator of the unit？
A, lack of refrigerant, resulting in changes in working conditions;
B, the oil temperature is too low resulting in low oil filling efficiency;
C, oil filler damage or low efficiency;
5、 What happens when there is too much oil in the evaporator？
A, low inspiratory pressure;
B, the refrigeration efficiency is seriously reduced;
C, occasionally compressor suction fluid compression, loud noise, machine wear;
6、What is the phenomenon of oil cooler fouling？
A, the oil temperature can not come down;(High oil temperature)
B, in and out of the water temperature difference is not large;
7、 Reasons for inaccurate ammonia (fluorine) level meter？
A、制冷Too little fluid;
B, liquid mirror glass dirty;
C, refrigeration conditions change dramatically;
D, the liquid level gauge inlet and outlet pipe has air bags or the caliber is too large
8、  What are the phenomena of insufficient refrigerant liquid？
A, low liquid level;
B, low suction and exhaust pressure;
C, open the bypass to see the operation of the unit, whether the suction and exhaust pressure can rise, or low;
D, cooling efficiency decreased
9、Cooling tower fouling phenomenon？
A, the temperature of cooling water can not fall;
B, the dirt on the filler is much;
C, the exhaust pressure and oil temperature are too high
D, the load can not be increased, resulting in protection shutdown。