GEA HG34P Maintenance Manual

Also see for HG34e: Assembly instructions Assembly instructions

Contents

GEA HG34P Maintenance Manual Manual pdf 7 page image

796194-05.2016-GbOil problemsProblem Possible cause RemedyOil pressure too low - Refrigerant in oil - see „Oil foams“- Too little oil in compressor - Add oil and search for the cause of oil loss- Oil filter dirty / blocked - Clean / replace oil filterChange oilOil foams during start-up phase - Liquid refrigerant has moved into the oil sump - Check the laying of pipes- Installation of the check valve in thedischarge line- Installation of the solenoid valve in theliquid line- Check the controlOil foams during operating - Expansion valve not functioning - Adjust / replace expansion valveOil level decreases - During start-up, a portion of the oil is carriedto the refrigeration plant with the refrigerant- Refrigerant and oil get mixed. After some timethe oil level should stabilize.Add oil, if necessary.- Refrigerant in oil - see „Oil foams during start-up phase“- Piston rings worn - Replace piston rings- Suction / discharge laminations of the valveplate leaking- Replace valve plate2 I Fault diagnosisAbnormal running noise from compressorProblem Possible cause RemedyFixation of compressor is loose - Screwed connections have become loose- Securing elements for screwed connectionsmissing- Tighten the screwed connections and securethem anew- Vibration metals defective - Replace vibrations metalsLiquid shock - Liquid refrigerant reaching the compressor - Adjust / check expansion valveCheck refrigerant fillingCheck evaporator fan- Icing-up of the evaporator- Oil shocks because of too much oil - Check oil levelCheck the dimensioning of pipes (gas velocity)Replace worn piston ringsCapacity regulator (accessory) - Switching on and off constantly / oscillating - Check the control- Defective - Replace capacity regulator valveProblem Possible cause RemedyDischarge pipe temperaturetoo high- Cooling insufficient - Check refrigerant filling- Adjust expansion valve- Short circuit between the discharge and thesuction side of the compressor- Check gaskets on valve plate /change- Valve plate damage - Replace valve plate