Panasonic CS-MA90KE Service Manual

Panasonic CS-MA90KE Service Manual Manual pdf 42 page image

– 41 –CS-MA90KERefrigeration cycle systemIn order to diagnose malfunctions, make sure thatthere are no electrical problems before inspect-ing the refrigeration cycle. Such problems includeinsufficient insulation, problem with the power source,malfunction of a compressor or a fan.The normal outlet air temperature and pressureof the refrigeration cycle depends on various condi-tions; the standard values for them are shown in thetable on the right.Normal Pressure and Outlet Air Temperature (Standard)Cooling modeHeating ModeOutlet airtemperature(°C)12 ~ 1636 ~ 45l Measure the electric currentduring operationl Measure the gas side pressurel Measure the air temperature dif-ferenceLess than 8°C at cooling modeLess than 14°C at heating modeTroubleshooting GuideH Condition: Indoor fan speed; HighOutdoor temperature 35°C at cooling mode and7°C at heating modeGas pressureMPa(kg/cm 2G)0.4 ~ 0.6 (4 ~ 6)1.5 ~ 2.1 (15 ~ 21)Difference in the intakeand outletair temperatures Above 8°C(15 minutes after anoperation is started.)at cooling modeAbove 14°C(15 minutes after anoperation is started.)at heating modeNormalValue of electriccurrent during operationHigher than specified Dusty condenserpreventing heat radiationExcessive amountof refrigerantLower than specifiedGas sidepressureCooling ModeLowInefficient compressorInsufficient refrigerantClogged strainer orcapillary tubeInefficient compressorInsufficient refrigerantClogged strainer orcapillary tubeLowLowLowLowHighHeating Mode