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Refrigeration system problem in ship, compressor start and stops frequently

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If while maintaining the correct temperature of the ship’s provision room or reefer cargo, the reefer compressor is frequently cutting-in and out, then such problem needs to be sorted out immediately. The most normal causes for such operation are :

ReasonsSolutions
Wrong Setting of Cutouts : It may be because the high pressure (HP) cutout is set too high or LP cutout is set too low.Check and change the setting to advisable limit.
Differential Setting Span is Small : The low pressure (LP) cut out is provided with starting and stopping pressure setting. If the setting span is too small, it will lead to frequent cut-in and cut-out of the compressor.Change the setting and increase the span between starting and stopping compressor pressures.
Defective Valves: If the compressor discharge valve is leaky or the line solenoid valve is not closing properly, this will lead to variation in sensor pressure and result in frequent cut-in and cut-out of compressor.Replace all the defective valves.
Clogged Suction Filters : Compressor is provided with a filter in the suction line. If that is clogged, it will lead to frequent LP cut out.Clean the filter.

Ship Refrigeration
Ship Refrigeration

 

Read more : Refrigeration system problem in ship, high compressor discharge temperature; Refrigeration system problem in ship : reducing oil level in compressor; Refrigeration system problem in ship, compressor is running continuously; Refrigeration system problem in ship : reduced cooling capacity

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