Samsung AM080BXMDGH/EU Service Manual

Troubleshooting4-46Samsung Electronics4-3-34 Refrigerant leakage error1. Pressure sensor Open/Short error determination method1) Identifies from when power is supplied or 2 minutes after RESET, and only when set is stopped.2) An Open/Short error will occur if the input voltage standard range of 0.5V ~ 4.95V is exceeded.2. Inspection MethodReplace Pressure sensorPlease re-inspect after connectingthe connector to the PCBNoYesDid the Pressure sensor connectorget disconnected from the PCB?Refill refrigerant after vacuumNoYesIs there refrigerant inside the set?(Please check by connecting the menufolder gauge to the service valve)Replace PCBNoYesOut of the PCB Pressuresensor terminals, is there voltage betweenpins 3 and 4 5V?The ▼ mark is the 1st pin on the PCB.Outdoor unitdisplay(Refrigerant leakage judgment before starting)(When start, refrigerant leakage judgment)JudgmentMethod∙ Before starting : Before compressor starting after system halt 2 minutes (High & low pressure sensor Open / Short error occurs and 1kg/cm2 or less)∙ When start : When the high pressure sensor value(cooling 3.1kg/ ㎠ , heating 2.2kg/ ㎠ ) is detection continuously for 3 secondsCause ofproblem∙ Refrigerant leakage and shortage∙ Disconnection or breakdown of high & low pressure sensor