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1. The suction temperature is too high during compressor operation
The main reasons for the high suction temperature during compressor operation are as follows: the suction superheat of the compressor is high; The suction tube is too long or the insulation effect is poor. To eliminate the compressor suction temperature is too high fault can be done:
The suction temperature can be reduced by increasing the opening degree of the thermal expansion valve properly and increasing the liquid supply to the evaporator to meet the needs of the refrigeration load;
Do a good job of compressor suction pipe insulation treatment to prevent a lot of harmful overheating, but also reduce the suction temperature is too high;
Adjust the return air pipe to shorten its length as much as possible to reduce the conditions for harmful overheating. Doing this can eliminate the compressor suction temperature is too high fault.
2. The exhaust temperature is too high during the operation of the compressor
Causes of excessive exhaust temperature in compressor operation:
For water-cooled condenser, the reasons are: insufficient cooling water or high water temperature; There is too much non-condensable gas (air) mixed in the refrigeration system, and too much scale in the condenser.
For the air-cooled condenser, the reasons are: too much dust in the fin gap; The surface of the fin is too much dirt; Fin lodging is severe, preventing air convection.
To eliminate the fault that the exhaust temperature is too high in the operation of the compressor, you can do so:
Water-cooled condenser: The number of pumps can be increased to increase the flow of cooling water or increase the cooling tower fan speed to reduce the cooling water temperature; Release the non-condensable gas mixed with people in the refrigeration system; Remove scale from condenser pipe wall.
Air-cooled condenser: Use vacuum cleaner to absorb dust in the fin gap; Clean the dirt on the fin with fin cleaning agent; Using a fin comb, repair the fallen fin.
3. The oil temperature is too high during compressor operation
Usually, the oil level of the oil mirror of the compressor is between the upper and lower limits of the oil mirror, and the lubricating oil is clean, not cloudy, and the color is normal. Causes of excessive lubricating oil temperature in compressor operation:
The suction and exhaust temperature of the compressor is too high.
Lubricating oil is too dirty or poor oil quality;
Compressor parts wear seriously;
The oil does not cool well.
To eliminate the compressor oil temperature is too high fault can be done:
Properly adjust the suction and exhaust temperature of the compressor to reduce it to the normal working parameter range;
Change the lubricating oil;
Inspecting the piston or cylinder liner of the compressor can eliminate the fault that causes the oil temperature to be too high when the compressor is running.
Clean oil for cooling.
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