Panasonic Cs Xc9ckh Cs Xc12ckh Series Repair Manual

							 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 low-pressure valveon the charge set slightly
to purge air from the charge hose. 5. Set the 2-wayvalve to theclose position.
 6. Operate the air conditioner at the cooling cycle and
stop it when the gauge indicates 1 kg/cm
2G (0.1 MPa).
 7. Immediately set the 3-way valve tothe closed position.
 • Do this quickly so that the gauge ends up indicating 3 to
5 kg/cm
2G (0.3 to 0.5 MPa).
 8. Disconnect the charge set, and mount the 2-way and 3-
way valve’s stemnuts and the service port caps.
 • Use a torque wrench to tighten the service port cap to a
torque of 1.8 kg.m (18 N.m).
 • Be sure to check for gas leakage.
11.1.2. Pumping down (Re-installation)
Procedure:
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							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 3 seconds then
closing it for 1 minute; repeat 3 times.
 • After purging the air, use a torque wrench to tighten the
flare nut onthe 2-wayvalve.
 4. Check for gas leakage.
 • Check the flare connections for gas leakage. 5. Discharge the refrigerant.
 • Close the valve on the charging cylinder and discharge
the refrigerant until the gauge indicates 3 to 5 kg/cm
2G
(0.3 to 0.5 MPa)
 6. Disconnect the charge set and the charging cylinder,
and set the 2-way and 3-wayvalves tothe open
position.
 • Be sure to use a hexagonal wrench to operate the valve
stems.
 7. Mount thevalve stemnuts and the service port cap.
 • Be sure to use a torque wrench to tighten the service
port cap to a torque 1.8 kg.m (18 N.m).
 • Be sure to check for gas leakage.
Procedure:
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							(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 is higher than 1
kg/cm
2G (0.1 MPa)], discharge the refrigerant until the
gauge indicates 0.5 to 1 kg/cm2G (0.05 to 0.1 MPa). If
this is the case, it will not be necessary to apply a
evacuation.
 • Discharge the refrigerant gradually; if it is discharged
too suddenly, the refrigeration oil will be discharged.
11.1.4. Balance refrigerant of the 2-way, 3-way valves
Procedure:
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							(No refrigerant in the refrigeration cycle)
 1. Connect the vacuum pump to the charge set’s centre
hose.
 2. Evacuation for approximately one hour.
 • Confirm that the gauge needle has moved toward -0.1
MPa (-76 cmHg) [vacuum of 4 mmHg or less.]
 3. Closethe valve(Low side) on thecharge set, turn off
the vacuum pump, and confirm that the gauge needle
does not move (approximately5 minutes after turning
off the vacuum pump).
 4. Disconnect the charge hose from the vacuum pump.
 • Vacuum pump oil
If the vacuum pump oilbecomes dirtyor depleted,
replenish as needed.
11.1.5. Evacuation (Installation)
Procedure:
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							11.1.6. Gas charging
(After Evacuation)
 1. Connect the charge hose to the charging cylinder.
 • Connect the charge hose which you disconnected from
the vacuum pump to the valve at the bottom of the
cylinder.
 2. Purge the air from the charge hose.
 • Open the valve at the bottom of the cylinder and press
the check valve on the charge set to purge the air (be
careful of the liquid refrigerant).
 3. Open the valve(Low side) on thecharge set and charge
the system with liquid refrigerant.
 • If the system cannot be charged with the specified
amount of refrigerant, it can be charged with a little at a
time (approximately 150 g eachtime) while operating
the air conditioner in the cooling cycle; however, one
time is not sufficient, waitapproximately 1minute and
then repeat the procedure. (pumping down-pin)
This is different from previous procedures. Because you are
charging with liquid refrigerant fromthe gas side, absolutely do
not attempt to charge with large amount of liquid refrigerant
while operating the air conditioner.
 4. Immediately disconnect the charge hose from the 3-
way valve’s service port.
 • Stopping partwaywill allow the refrigerant to be
discharged.
 • If the system has been charged with liquid refrigerant
while operating the air conditioner, turn off the air
conditioner before disconnecting the hose.
 5. Mount thevalve stemcaps and the service port cap.
 • Use torque wrench to tighten the service port cap to a
torque of 18 N.m.
 • Be sure to check for gas leakage.
Procedure:
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							 1. The Electronic Controller, a Signal Receiver and an
Indicator (Fig. 3) can be seen by the below steps:
 • Remove the 2 caps and 2 screws at the bottom of the
Front Grille. (Fig. 1)
 • Remove the Front Grille by releasing the 2 hooks at the
top of the Front Grille. (Fig. 1)
 • Remove the Control Board Cover by releasing the 2
tabs at left, 1 tab on top and 1 tab at right side of the
Control Board Cover. (Fig. 2)
 2. To remove the Electronic Controller:
 • Release the Particular Piece. (Fig. 3)
 • Release the hook that hold the Electronic Controller.
(Fig. 3)
 • Remove the Control Board by:-
 − Releasing CN-REC/DISP connectors. (Fig. 4)
 − Releasing CN-FM connectors. (Fig. 4)
 − Releasing CN-ION connector. (Fig. 4)
 − Releasing CN-STM connector. (Fig. 4)
 − Removing the Earth Wire screw. (Fig. 4)
 − Releasing the Intake Air Sensor. (Fig. 4)
 − Releasing the Piping Sensor. (Fig. 4)
Fig. 1
Fig. 2
Fig. 3
Fig. 4
12 Servicing Information
Caution: • Pb free solder has a higher melting point than standard solder; Typically the melting point is 50 - 70°F (30 - 40°C) higher. Please use
a high temperature soldering iron. In case of the soldering iron with temperature control, please set it to 700 ± 20°F (370 ± 10°C).
 • Pb free solder will tend to splash when heated too high (about 1100° F/600°C).
12.1. Indoor Unit
12.1.1. Indoor Electronic Controllers Removal Procedures
12.1.2. Indoor Fan Motor and Cross Flow Fan Removal Procedures
56 
						

							 − Pulling out the Drain Hose from outlet to remove the
Discharge Grille. (Fig. 5)
 − Removing the right and left screws. (Fig. 5)
 − Then remove the Control Board by pressing down the
hook at the left and pushing up the right hook. (Fig. 5)
 − Releasing connector lead wire Ionizer. (Fig. 5)
 − Release the Fan Motor leadwire by pressing the hook at
the center of the connector. (Fig. 6)
 − Remove the screw at the Cross Flow Fan. (Fig. 7)
 − REMINDER - To reinstall the Fan Motor, adjust the
connector of the Fan Motor as shown in the Fig. 7.
Fig. 5
Fig. 6
Fig. 7
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							 − Remove the screws at the left of the Evaporator. (Fig. 8)
 − Remove the Bearing. (Fig. 9)
 − Push up the Evaporator and pull out the Cross Flow Fan
from shaft. By then, Fan Motor can be taken out. (Fig. 9)
Fig. 8
Fig. 9
12.2. Outdoor Unit
12.2.1. Cabinet Side Plate Removal Procedures
 1. The Vacuum Pump, Filter- Oxygen Generator (Fig. 4) can be seen by the below steps:
a. Remove 3 screws on the Cabinet Top Plate. (Fig. 1)
b. Pull up the Cabinet Top Plate. (Fig. 1)
Fig. 1
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							c. Remove 6 screws on the Cabinet Front Plate. (Fig. 2)
Fig. 2
d. Pull out the Cabinet Front Plate from your left side. (Fig. 3)
Fig. 3
e. Pull down and release the Oxygen tube from the Muffler.
(Fig. 4)
Fig. 4
59 
						

							f. Remove the screw to take out the control board cover.
(Fig. 5)
Fig. 5
g. Remove the 10 screws to take out Cabinet Side Plate right.
(Fig. 6)
Fig. 6
Fig. 7
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