When an expansion valve is defective, it must be replaced. Some valves used on naval ships have replaceable assemblies and it is possible to replace a faulty power element or other part of the valve without having to replace the entire assembly. When replacement of an expansion valve is necessary, replace the unit with a valve of the same capacity and type.

ADDITIONAL SYSTEM MAINTENANCE

In addition to the maintenance of the components described above, there are other parts of the system that will need periodic maintenance to keep the plant operating properly.

Vibration may cause leakage in the piping system, allowing air and moisture to be drawn in or there may be a loss of the refrigerant charge. If this happens, the plant will operate erratically and inefficiently until the cause of trouble is corrected.