Carrier Acqua Junior 30AJ Series Installation, Operation And Maintenance Manual

Also see for 30AJ: Installation, operation and maintenance manual

72Problem Probable Cause Procedure8. Reduced suction pressure, may not resultin the opening of the low pressure switch.Reduced discharge pressure. • Ver item 7.Insufficient thermal load. • Verificar condiciones de proyecto.Refrigerant lack. • Verificar y corregir pérdidas. Adicionarrefrigerante si es necesario.Low evaporator water flow. • Verificar válvula de regulación decaudalde agua del evaporador• Verificar regulación del registrode la bomba de agua fría.• Verificar filtro de agua fría.Insufficient refrigerant supply in the evaporator. • Verificar obstrucción en el filtro secadoro en las líneas. Sustituir o corregir.• Verificar obstrucción en la válvula deexpansión. Sustituir si es necesario.• Check overheating setting ofthe expansion valve (4 to 6°C).Set if necessary.• Verificar posición del bulbo y deltubo ecualizador de la válvula deexpansión.Corregir de acuerdocon especificación de fábrica.• Verificar operación de laválvula solenoide.9. High suction pressure Excessive thermal load. • Verificar condiciones del proyecto.Defective compressor. • Check suction and dischargepressures. Replace if necessary.Compressor runs at reversed rotation. • Check suction and discharge pressures.In case, reversion is detected,invert the terminal power cables.10. Water leaks Defective cold water connections. • Check and correct.Obstructed condensate draining. • Check and clean condensatetrays and drains.Improper installation of the draining lines. • Check connections and siphons.• Correct if necessary.11. Noisy unit Noisy compressor. • Check expansion valve setting.• Check internal noises.Replace if required.• Check correct phase sequence.Vibrations in the refrigerant orcondensation water piping.• Check and correct.Panels or metallic parts notproperly fastened.• Check and fix.12. Liquid line “sweats” (watercondensation on the outside surface)Dryer filter with restricted passage. • Remove restrictions and/or replace the dryer filters.13. Suction line “sweats” The expansion valve acceptsexcessive refrigerant.• Fix the expansion valve.