Évaluations - 4, GPA: 3.5
(
)
)
|
Facilité d'utilisation
This will keep oil from foaming and being drawn into the vacuum pump. 3) Operate the vacuum pump vaccum for 20 to 30 minutes, until 600 microns of vaccum is obtained. Close valves A and B, and observe vacuum gauge for a few minutes. A rise in pressure would indicate a possible leak or moisture Figure 29 remaining in the system. With valves A and B closed, stop the vacuum pump. 4) Remove the hose from the vacuum pump and place it on the charging cylinder. See figure 37B. Open valve C. Discharge the line at the manifold connection. 5) The system is now ready for final charging. 6. Recharge as follows : 1) Refrigeration cycle systems are charged from the High-side. If the total charge cannot be put in the High-side, the balance will be put in the suction line through the access valve which you installed as the system was opened. 2) Connect the charging cylinder as shown in figure 30B. With valve C open, discharge the hose at the manifold connection. 3) Open valve A and allow the proper charge to enter the system. Valve B is still closed. 4) If more charge is required, the high-side will not take it. Close valve A. 5) With the unit running, open valve B and add the balance of the charge. a. Do not add the liquid refrigerant to the Low-side. b. Watch the Low-side gauge; allow pressure to rise to 30 lbs. c. Turn off valve B and allow pressure to drop. d. Repeat steps b. and c. until the balance of the charge is in the system. 6) When satisfied the unit is operating correctly, use the pinch-off tool with the unit still running and clamp on to the pinch-off tube. Using a tube cutter, cut the pinch-off tube about 2 inches from the pinch-off tool. Use sil-fos braze and braze pinch-off tube closed. Turn off the unit, allow it to set for a while, and then test the leakage of the pinch-off connection. 14 Room Air Conditioner Disassembly Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pin-off tool capable of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. A COMPOUND GAUGE EVAPORATOR (LOW PRESSURE SIDE) COMPRESSOR CAPILLARY TUBE CONDENSER (HIGH PRESSURE SIDE) SEE INSETS BELOW MANIFOLD GAUGE B Figure 30A-Pulling Vacuum Figure 30B-Charging A B EXTERNAL VACUUM PUMP A CHARGING CYLINDER LOW HI B C Service Manual 15 Schematic Diagram Circuit Diagram 1 6 4 5 8 3 7 2 LOCATION NO. DESCRIPTION Q'TY PER SET 1 POWER CORD ASSEMBLY 1 2 FAN MOTOR 1 3 COMPRESSOR 1 4 DISPLAY P.W.B ASSEMBLY 1 5 MAIN P.W.B ASSEMBLY 1 6 THERMISTOR 1 7 CAPACITOR 1 8 OWERLOAD PROTECTOR 1 Service Manual 16 17 Room Air Conditioner Electronic Control Device Schematic Diagram Service Manual 18 Components Location(For Main P.W.B ASM) Schematic Diagram Troubleshooting Guide Troubleshooting Guide Piping System CAPILLARY TUBE COMPRESSOR BLOWER EVAPORATOR COIL CONDENSER COIL FAN MOTOR Figure 38 is a brief description of the important components and their function in what is called the refrigeration system. This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle. ROOM AIR CONITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS MOTOR COMPRESSOR OIL (LIQUID REFRIGERANT) CAPILLARY TUBE OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH SUCTION LINE COOL LOW PRESSURE VAPOR COOLED AIR COMPLETE LIQUID BOIL OFF POINT LIQUID PRESSURE DROP ROOM AIR HEAT LOAD VAPOR INLET HOT DISCHARGED AIR LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID REFRIGERANT LOW PRESSURE VAPOR Figure 34 19 Room Air Conditioner Troubleshooting Guide Troubleshooting Guide In general, possible trouble is classified in two kinds. The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit runs but poor cooling. Ineffective Cooling Satisfactory operation with temperature difference of inlet & outlet air; 44~50°F (7~10°C) Replacement of unit if the unit is beyond repair. Check outdoor coil (heat exchanger) and fan operation. Check heat load increase. Check cold air circulation for smooth flow. Check gas leakage. Clean condenser. Not on separate circuit Check inside gas pressure. Adjust refrigerant charge. Malfunction of compressor. Replacement of compressor. Check clogging in refrigeration circuit. Repair clogging in refrigeration circuit. Dirty indoor coil (heat exchanger) Repair gas leak. Malfunction of fan. Clogging of air filter. Obstruction at air outlet. Remove obstruction. Service Manual 20 Troubleshooting Guide Fails to Start Improper thermistor setting Loose terminal connection Improper wiring Check of power source. Drop of power voltage. Capacitor check. Replacement. Check of control panel setting. Compressor fails only to start. Defect of compressor capacitor. Irregular motor insulation (.) Irregular motor resistance (.) Check of circuit breaker and fuse. Check control panel. Fan only fails to start. Improper wiri...
Ce manuel est également adapté pour les modèles :Climatiseurs - CP06E10 (2.71 mb)