Panasonic Cs A7dkd Cs A9dkd Cs A12dkd Repair Manual
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Page 51
2. Set the vertical airflow direction louver to the horizontal position. 3. Slide down the 2 caps on the front grille as shown in the illustration at right, and then remove the 2 mounting screws. 4. Pull the lower section of the front grille towards you to remove the front grille. When reinstalling the front grille, first set the vertical airflow direction louver to the horizontal position and then carry out above steps 2 -3 in the reverse order. AUTO SWITCH OPERATION The below operations will be...
Page 52
MODELPiping size (Torque) GasLiquid C7DK, C9DK, A7DK, A9DK3/8” (42 N.m)1/4” (18 N.m) C12DK, A12DK1/2” (55 N.m)1/4” (18 N.m) Connecting The Piping To Outdoor Unit Decide piping length and then cut by using pipe cutter. Remove burrs from cut edge. Make flare after inserting the flare nut (located at valve) onto the copper pipe. Align center of piping to valves and then tighten with torque wrench to the specified torque as stated in the table. CUTTING AND FLARING THE PIPING 1. Please cut using pipe cutter...
Page 53
10.6.4. EVACUATION OF THE EQUIPMENT WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES in the following procedure. 1. Connect a charging hose with a push pin to the Low andHigh side of a charging set andthe service port ofthe 3-wayvalve. • Be sure to connect the end of the charginghose with the push pin to the service port. 2. Connect the center hose of the charging set to a vacuum pump. 3. Turn on the power switch of the vacuum pump and make sure that...
Page 54
DISPOSAL OFOUTDOOR UNITDRAIN WATER • If the drain elbow is used, the unit should be placed on a stand which is taller than 3cm. • If the unit is used in an area where temperature falls below 0° C for 2 or 3 days in succession, it is recommended not to use a drain elbow, for the drain water freezes and the fan will not rotate. CHECK THEDRAINAGE • Open front panel and remove air filters. (Drainage checking can be carriedout without removing the front grille.) • Pour a glass of water into the drain...
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CHECK ITEMS Is there any gas leakage at flare nut connections? Has the heat insulation been carried out at flare nut connection? Is the connecting cable being fixed to terminal board firmly? Is the connecting cable being clamped firmly? Is the drainage OK? (Refer to “Check the drainage” section) Is the earth wire connection properly done? Is the indoor unit properly hooked to the installation plate? Is the power supplyvoltage complied with rated value? Is there any abnormal sound? Is the cooling...
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11 2-way, 3-way Valve 2-way Valve (Liquid Side)3-way Valve (Gas Side) WorksShaft PositionShaft PositionService Port ShippingCloseCloseClose (With valve cap)(With valve cap)(With cap) EvacuationCloseCloseOpen (Installation and(Counter-Clockwise)(Clockwise)(Push-pin) Re-installation) OperationOpenOpenClose (With valve cap)(With valve cap)(With cap) Pumping downCloseOpenOpen (Transferring)(Clockwise)(Counter-Clockwise)(Connected manifo ld gauge) EvacuationOpenOpenOpen (Servicing)With vacuumpump Gas...
Page 57
Required tools: hexagonal wrench, adjustable wrench, torque wrenches, wrench to hold the joints and gas leak detector. The additional gas for air purging has been charged in the outdoor unit. However, if the flare connections have not been done correctly and there gas leaks, a gas cylinder and the charge set will be needed. 1. Recheck the piping connections. 2. Open thevalve stemof the2-wayvalvecounter- clockwise approximately 90°, wait 10 seconds, and then set it to closed position. • Be sure to use...
Page 58
1. Confirm that both the 2-way and 3-wayvalves are set to the opened position. • Remove the valve stem caps and confirm that the valve stems are in the opened position. • Be sure to use a hexagonal wrench to operate the valve stems. 2. Operate the unit for 10 to 15 minutes. 3. Stop operation and wait for 3 minutes, then connect the charge set to the service port of the 3-wayvalve. • Connect the charge hose with the push pin to the Gas service port. 4. Air purging of the charge hose. • Open the...
Page 59
11.1.3. Re-air purging (Re-installation) 1. Confirm that both the 2-way and 3-wayvalves are set to the closed position. 2. Connect the charge set and a charging cylinder to the service port of the 3-wayvalve. • Leave the valve on the charging cylinder closed. 3. Air purging. • Open the valves on the charging cylinder and the charge set. Purge the air by loosening the flare nut on the 2-wayvalve approximately 45° for 3seconds then closing it for 1 minute; repeat 3 times. • After purging the air, use...
Page 60
(Gas leakage) 1. Confirm that both the 2-way and 3-wayvalves are set to the open position. 2. Connect the charge set tothe 3-way valve’s service port. • Leave the valve on the charge set closed. • Connect the charge hose with the push pin to the service port. 3. Open the valves(Low side) on the charge set and discharge the refrigerant until the gauge indicates 0.5 to 1 kg/cm 2G (0.05 to 0.1 MPa). • If there is no air in the refrigeration cycle [ the pressure when the air conditioner is not running...