Panasonic NR-B203G-S7 Service Manual

Contents

Panasonic NR-B203G-S7 Service Manual Manual pdf 8 page image

1X. REFRIGERATING UNIT REPAIRING PROCEDURESTANDARD PROCEDUREDiagnosing the troubleDischarging the refrigerantRemoving the CompressorChecking the compressor oilA little discoloration(light yellow)Severe discoloration(light brown)Purging the pipe athigh-pressure sidePurging the pipe at low-pressure sideSetting the compressor and the dryerVacuum pumping and pot the electric partsCharging the refrigerantLeakage testTest RunPinch-off seal of charge pipesFinishIMPORTANT POINTSRefer to the TROUBLE SHOOTING* For purging the pipe, use HFC-134a as liquid state.* Never use HCFC-141b, HCFC-22 for purging.* Do not keep the pipes open to air more than 30minutes.These process in total should be finished within 30minutes.* Rubber caps should be removed just beforecompressor is used. Never leave the compressorwithout the caps and open to the air.Be sure to connect the adaptor with vacuum pump.Charge cylinder should be exclusive - use for HFC-134a.This is to prevent different refrigerant (CFC-12,HCFC-22, CFC-113, HFCFC-141b, R-502) frommixing with HFC-134a.-8-