Panasonic CS-A28BKP5 Service Manual

Also see for CS-A28BKP5: Operating instructions

Panasonic CS-A28BKP5 Service Manual Manual pdf 53 page image

11.2. Pumping down1. Confirm that both the 3-way valves are set to the openposition.• Remove the valve stem caps and confirm that the valvestems are in the open position.• Be sure to use a hexagonal wrench to operate the valvestems.2. Operate the unit for 10 to 15 minutes.3. Stop operation and wait for 3 minutes, then connect thecharge set to the service port of the 3-way valve.• Connect the charge hose with the push pin to the Gasside service port.4. Air purging of the charge hose.• Open the low-pressure valve on the charge set slightlyto purge air from the charge hose.5. Set the Liquid side 3-way valve to the close position.6. Operate the air conditioner at the cooling cycle andstop it when the gauge indicates 0 kg/cm 2 G (0 MPa).• If the unit cannot be operated at the cool condition(weather is rather cool), press the Pump Down Switchon the Indoor unit.• So that the unit can be operated.7. Immediately set the gas side 3-way valve to the closeposition.• Do this quickly so that the gauge ends up indicating 1 to3 kg/cm2 G (0.1 MPa to 0.3 MPa).8. Use refrigerant reclaiming equipment to collectrefrigerant from indoor unit and pipes.9. Disconnect the charge set, and mount both the 3-wayvalve’s stem nuts and the service port caps.• Use a torque wrench to tighten the service port cap to atorque of 18 N.m.• Be sure to check for gas leakage.10. Disconnect pipes from indoor unit and outdoor unit.Procedure:53CS-A28BKP5/CU-A28BKP5