Panasonic CS-XC9CKT / CU-XC9CKT / CS-XC12CKT / CU-XC12CKT Service Manual ▷ View online
CUTTING AND FLARING THE PIPING
1. Please cut using pipe cutter and then remove the burrs.
2. Remove the burrs by using reamer. If burrs is not
removed, gas leakage may be caused.
Turn the piping end down to avoid the metal powder
entering the pipe.
entering the pipe.
3. Please make flare after inserting the flare nut onto the
copper pipes.
(1) *
*
Connect the manifold gauge to the service port of 3-way
valve.
Measure the pressure.
valve.
Measure the pressure.
(2) *
*
Keep it for 5-10 minutes.
Ensure that the pressure indicated on the gauge is the
same as that of measured during the first time.
Ensure that the pressure indicated on the gauge is the
same as that of measured during the first time.
10.3.4. AIR PURGING OF THE PIPING AND INDOOR UNIT
The remaining air in the Refrigeration cycle which contains moisture may cause malfunction on the compressor.
1. Remove the caps from the 2-way and 3-way valves.
2. Remove the service-port cap from the 3-way valves.
3. To open the valve, turn the valve stem of 2-way valve counter-clockwise approx. 90° and hold it there for ten seconds, then
close it.
4. Check gas-leakage of the connecting portion of the pipings.
For the left pipings, refer to item 4(A).
5. To open 2-way valve again, turn the valve stem counter-clockwise until it stops.
4(A). Checking gas leakage for the left piping.
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CS-XC9CKT CU-XC9CKT / CS-XC12CKT CU-XC12CKT
CHECK THE DRAINAGE
•
•
•
• Open front panel and remove air filters.
(Drainage checking can be carried out without removing the
front grille.)
front grille.)
•
•
•
• Pour a glass of water into the drain traystyrofoam.
•
•
•
• Ensure that water flows out from drain hose of the indoor
unit.
EVALUATION OF THE PERFORMANCE
•
•
•
• Operate the unit at cooling operation mode for fifteen
minutes or more.
•
•
•
• Measure the temperature of the intake and discharge air.
•
•
•
• Ensure the difference between the intake temperature and
the discharge is more than 8°C.
CHECK ITEMS
Is there any gas leakage at flare nut connection?
Has the heat insulation been carried out at flare nut
connection?
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)
(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 supply voltage complied with rated value?
Is there any abnormal sound?
Is the cooling operation normal?
Is the thermostat operation normal?
Is the remote control’s LCD operation normal?
Is the air purifying filter installed?
10.3.5. CONNECT THE CABLE TO THE OUTDOOR UNIT
1. Remove the control board cover from the unit by loosening the screw.
2. Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed 5 (XC9CK, XC12CK) × 1.5
mm
2
flexible cord, type designation 245 IEC 57 or heavier cord.
3. Secure the cable onto the control board with the holder (clamper).
4. Attach the control board cover back to the original position with the screw.
10.3.6. PIPE INSULATION
1. Please carry out insulation at pipe connection portion as mentioned in Indoor/Outdoor Unit Installation Diagram. Please wrap
the insulated piping end to prevent water from going inside the piping.
2. If drain hose or connecting piping is in the room (where dew may form), please increase the insulation by using POLY-E FOAM
with thickness 6 mm or above.
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CS-XC9CKT CU-XC9CKT / CS-XC12CKT CU-XC12CKT
10.3.7. OXYGEN TUBE CONNECTION
Precautions during oxygen tube connection
1. Tube allowable length and height difference is the same as
pipes.
2. Tube should be pulled without folding it along the path of
refrigerant pipe, providing sufficient allowance and cut to
length.
length.
•
•
•
• If there is no allowance, tube length will contract when
temperature changes and it may cause trouble.
•
•
•
• On the other hand, tube length used without cutting and
in the form of loop too should be avoided.
3. When the tube is passed throught the pipe hole, it should
not form the inner wall of the pipe bends.
The tube may be pressed to the corner of the hold and
crushed.
crushed.
4. Cutting of tube should be done with cutter or knife, cutting
suface should be straight and even.
Finishing should be done and leave no scratches behind.
5. Tube end’s last 15 mm (the section to be inserted to the
joint during connection) should be free from any damages.
6. Take note that the inside of tube should be free from
stones, dirt, dust, and other impurities.
Oxygen tube connection
•
•
•
• Insert oxygen tube into the joint section of indoor unit till it
fully reaches its limit (about 15 mm).
•
•
•
• Insert into the joint of outdoor unit in the same manner.
•
•
•
• If the insert does not fully reach the limit, oxygen may leak
out from the joint causing abnormal noise.
•
•
•
• In both indoor and outdoor unit, the tube inserted will be
locked inside the joint by the stopper, and the job is
complete. To make sure that it’s done properly, pull out
lightly to check if can be removed.
complete. To make sure that it’s done properly, pull out
lightly to check if can be removed.
Connection check
•
•
•
• Do
connection
check
after
normal
running
of
cooling/heating/ has been confirmed during trial operation.
(You cannot do proper oxygen tube connection check
before normal running has been confirmed during trial
operation).
before normal running has been confirmed during trial
operation).
•
•
•
• Operate according to the sequence listed below, and check
tube connection.
1. Check if the cap at the air filter (right) inner area of
oxygen supply section releases air after it has been
lifted up.
lifted up.
( If there is no air release, the cause may be tube
collape, or the insert at join section not proper. Check
again and make correction if found not properly done.)
collape, or the insert at join section not proper. Check
again and make correction if found not properly done.)
2. After checking, make sure that you push down the cap
and return to its original position.
(If it is not returned to its position, it may cause
abnormal noise.)
abnormal noise.)
Finishing
•
•
•
• Finishing should be carried out for pipe and drain hose.
•
•
•
• Refer to 10.3.6 Pipe insulation of outdoor unit.
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CS-XC9CKT CU-XC9CKT / CS-XC12CKT CU-XC12CKT
11 2-way, 3-way Valve
2-way Valve (Liquid Side)
3-way Valve (Gas Side)
Works
Shaft Position
Shaft Position
Service Port
Shipping
Close
Close
Close
(With valve cap)
(With valve cap)
(With cap)
Evacuation
Close
Close
Open
(Installation and
(Counter-Clockwise)
(Clockwise)
(Push-pin)
Re-installation)
Operation
Open
Open
Close
(With valve cap)
(With valve cap)
(With cap)
Pumping down
Close
Open
Open
(Transferring)
(Clockwise)
(Counter-Clockwise)
(Connected manifold
gauge)
Evacuation
Open
Open
Open
(Servicing)
With vacuum pump
Gas charging
Open
Open
Open
(Servicing)
(With charging cylinder)
Pressure check
Open
(Servicing)
Open
Open
(Connected manifold
gauge)
Gas releasing
Open
(Servicing)
Open
Open
(Connected manifold
gauge)
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CS-XC9CKT CU-XC9CKT / CS-XC12CKT CU-XC12CKT
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