Panasonic CU-C18CKV Service Manual

Contents

Panasonic CU-C18CKV Service Manual Manual pdf 51 page image

Required tools: Hexagonal wrench, adjustable wrench,torque wrenches, wrench to hold thejoints, gas leak detector, and chargingset.1. Recheck the piping connections.2. Open the valve caps and service port caps for both3-way valves.3. Connect the charging cylinder to the manifold gauge asshown above.4. Open the valve of the low pressure side of manifoldgauge counterclockwise for 10 seconds, and then closeit.5. Check for gas leakage.•••• Check the flare connections for gas leakage.6. Purge the air from the system.•••• Open the Low pressure side valve of the manifoldgauge.•••• Press the service port pin with the hexagonal wrench topurge the air for three seconds and then wait for oneminute.Repeat this three times or more.7. Balance the refrigerant in the pipings and the indoorunit.•••• Close the Low pressure side valve of the manifoldgauge.•••• Press the service port pin with the hexagonal wrench torelease the refrigerant until the gauge indicates 0.1 to0.3 MPa.The air in the indoor unit and in the piping must be purged. If airremains in the refrigeration pipes, it will affect the compressor,reduce the cooling capacity, and could lead to a malfunction.8. Use torque wrench to tighten the service port cap to atorque of 18 N.m.9. Set the both 3-way valves to the open position.10. Mount the valve caps to the 3-way valves.11. Check for gas leakage.•••• At this time, especially check for gas leakage from theboth 3-way valve’s caps, and from the service port caps.CautionIf gas leakage is discovered in step (3) above, takethe following measures:a. Re-tighten the connecting portion with torquewrenches.If the leakage ceases, continue the works fromstep (4).b. Locate and repair the leak. (Gas leak detector)Repeat the works from step (1).11.1. Air Purging of the Piping and Indoor Unit11.1.1. Air purgingService port capBe sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents the gas leakage fromthe refrigeration cycle.Procedure:51CS-C18CKV CU-C18CKV / CS-C24CKV CU-C24CKV