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 :
| Reasons | Solutions |
| 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. |
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
