Panasonic CS-E15DKEW Service Manual

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Panasonic CS-E15DKEW Service Manual Manual pdf 68 page image

10.4.5. Recharging Refrigerant During ServicingWhen recharging is necessary, insert the specified amount of new refrigerant in accordance with the following procedure.1. Connect the charging hose to the service port of the outdoor unit.2. Connect the charging hose to the vacuum pump adaptor. At this time, fully open the 2-way valve and 3-way valve.3. Fully open the handle Lo of the manifold gauge, turn on the power of the vacuum pump and continue the vacuum process forat least one hour.4. Confirm that the low pressure gauge shows a reading of -0.1 Mpa (-76 cmHg), then fully close the handle Lo, and turn off thevacuum pump. Wait for 1-2 minutes, then check to make sure that the needle of the Low pressure gauge has not returned. SeeFig. 13 for the remaining steps of this procedure.5. Set the refrigerant cylinder onto the electronic scale, then connect the hose the cylinder and to the connection port for theelectronic scale. (1)(2)Precaution:Be sure to set up the cylinder for liquid charging. If you use a cylinder equipped with a siphon tube, you can charge the liquidwithout having to turn the cylinder around6. Remove the charging hose of the manifold gauge from the vacuum pump adaptor, and connect it to the connection port of theelectronic scale. (2)(3)7. Open the valve of the refrigerant cylinder, then open the charging valve slightly and close it. Next, press the check valve of themanifold gauge and purge the air. (2)(4) (Watch the liquid refrigerant closely at this point.)8. After adjusting the electronic scale to zero, open the charging valve, then open the valve Lo of the manifold gauge and chargewith the liquid refrigerant. (2)(5) (Be sure to read the operating instructions for the electronic scale.)9. If you cannot charge the stipulated amount, operate the unit in the cooling mode while charging a little of the liquid at a time(about 150 g/time as a guideline). If the charging amount is insufficient from one operation, wait about one minute, then use thesame procedure to do the liquid charging again.Precaution:Never use the gas side to allow a larger amount of liquid refrigerant to be charged while operating the unit.10. Close the charging valve, and after charging the liquid refrigerant inside the charging hose, fully close the valve Lo of themanifold gauge, and stop the operation of the unit. (2)(5)11. Quickly remove the charging hose from the service port. (6) If you stop midway through, the refrigerant that is in the cycle willbe discharged.12. After putting on the caps for the service port and operating valve, inspect around the caps for a gas leak. (6)(7)Fig. 13 Re-charging refrigerant68CS-E15DKEW CU-E15DKE / CS-E18DKEW CU-E18DKE / CS-E21DKES CU-E21DKE