Panasonic CS-MA75KE / CS-MA95KE / CS-MA125KE / CU-MA185KE / CU-MA195KE / CU-MA245KE 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 and 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.
10.3.4. EVACUATION OF THE EQUIPMENT
WHEN INSTALLING AND AIR CONDITIONER, BE SURE TO
EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES
in the following procedure.
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 and
High side of a charging set and the service port of the 3-way
valve.
valve.
•
Be sure to connect the end of the charging hose with the
push pin to the service port.
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 the needle in the gauge moves from 0 cmHg (0
MPa) to -76 cmHg (-0.1 MPa). Then evacuate the air
approximately ten minutes.
MPa) to -76 cmHg (-0.1 MPa). Then evacuate the air
approximately ten minutes.
4. Close the valve of both the Low and High sides of the
charging set and turn off the vacuum pump. Make sure that
the needle in the gauge does not move after approximately
five minutes.
the needle in the gauge does not move after approximately
five minutes.
Note: BE SURE TO TAKE THIS PROCEDURE IN ORDER
TO AVOID REFRIGERANT GAS LEAKAGE.
TO AVOID REFRIGERANT GAS LEAKAGE.
5. Disconnect the charging hose from the vacuum pump and
from the service port of the 3-way valve.
6. Tighten the service port caps of the 3-way valve at torque of
18 N.m with a torque wrench.
7. Remove the valve caps of both of the 2-way valve and 3-
way valve. Position both of the valves to “OPEN” using a
hexagonal wrench (4 mm).
hexagonal wrench (4 mm).
8. Mount valve caps onto the 2-way valve and the 3-way valve.
•
Be sure to check for gas leakage.
CAUTION
•
If gauge needle does not move from 0 cmHg (0
MPa) to -76 cmHg (-0.1 MPa), in step 3 above take
the following measure:
MPa) to -76 cmHg (-0.1 MPa), in step 3 above take
the following measure:
•
If the leak stops when the piping connections are
tightened further, continue working from step 3.
tightened further, continue working from step 3.
•
If the leak does not stop when the connections are
retightened, repair the location of leak.
retightened, repair the location of leak.
•
Do not release refrigerant during piping work for
installation and re-installation. Take care of the
liquid refrigerant, it may cause frostbite.
installation and re-installation. Take care of the
liquid refrigerant, it may cause frostbite.
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 × 1.5 mm
2
flexible cord, type designation H05 RN-F 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
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CS-MA95KE CU-MA185KE / CS-MA125KE CU-MA245KE / CS-MA75KE / CS-MA125KE CU-MA195KE
mentioned in Indoor/Outdoor Unit Installation Diagram.
Please wrap the insulated piping end to prevent water from
going inside the piping.
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.
FOAM with thickness 6 mm or above.
DISPOSAL OF OUTDOOR UNIT DRAIN WATER
•
If a drain elbow is used, the unit should be placed on a
stand which is taller than 3 cm.
stand which is taller than 3 cm.
•
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.
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 THE DRAINAGE
•
Open front panel and remove air filters.
(Drainage checking can be carried out without removing the
front grille.)
(Drainage checking can be carried out without removing the
front grille.)
•
Pour a glass of water into the drain tray-styrofoam.
•
Ensure that water flows out from drain hose of the indoor
unit.
unit.
EVALUATION OF THE PERFORMANCE
•
Operate the unit at cooling operation mode for fifteen
minutes or more.
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.
the discharge is more than 8°C.
NOTE
These equipment shall be connected to a suitable mains network
with a main impedance less than the following:
CS-MA125KE/CU-MA195KE, CS-MA125KE/CU-MA245KE: 0.32
with a main impedance less than the following:
CS-MA125KE/CU-MA195KE, CS-MA125KE/CU-MA245KE: 0.32
Ω
NOTE
These equipment shall be connected to a suitable mains network
with a main impedance less than the following:
CS-MA95KE / CU-MA185KE: 0.43
with a main impedance less than the following:
CS-MA95KE / CU-MA185KE: 0.43
Ω
CHECK ITEMS
Is there any gas leakage at flare nut connections?
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 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?
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CS-MA95KE CU-MA185KE / CS-MA125KE CU-MA245KE / CS-MA75KE / CS-MA125KE CU-MA195KE
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
Closed
Closed
(With valve cap)
(With valve cap)
(With cap)
Evacuation
Closed
Closed
Open
(Installation and
(Counter-Clockwise)
(Clockwise)
(Push-pin)
Re-installation)
Operation
Open
Open
Closed
(With valve cap)
(With valve cap)
(With cap)
Pumping down
Closed
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-MA95KE CU-MA185KE / CS-MA125KE CU-MA245KE / CS-MA75KE / CS-MA125KE CU-MA195KE
11.1. Evacuation of Installation
WHEN INSTALLING AN AIR CONDITIONER, BE SURE TO
EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES
in the following procedure.
EVACUATE THE AIR INSIDE THE INDOOR UNIT AND PIPES
in the following procedure.
Procedure:
1. Connect a charging hose with a push pin to the Low
side of a charging set and the service port of a 3-way
valve.
valve.
•
Be sure to connect the end of the charging hose with the
push pin to the service port.
push pin to the service port.
2. Connect the centre hose of the charging set to a
vacuum pump.
3. Turn on the power switch of the vacuum pump and
make sure that the needle in the gauge moves from 0
MPa (0 cmHg) to -0.1 MPa (-76 cmHg). Then evacuate
the air for approximately ten minutes.
MPa (0 cmHg) to -0.1 MPa (-76 cmHg). Then evacuate
the air for approximately ten minutes.
4. Close the Low side valve of the charging set and turn
off the vacuum pump. Make sure that the needle in the
gauge does not move after approximately five minutes.
gauge does not move after approximately five minutes.
BE SURE TO TAKE THIS PROCEDURE IN ORDER TO
AVOID GAS LEAKAGE.
AVOID GAS LEAKAGE.
If air remain in the indoor unit and refrigeration pipes, it will
affect the compressor, reduce to cooling capacity, and could
lead to a malfunction.
affect the compressor, reduce to cooling capacity, and could
lead to a malfunction.
5. Disconnect the charging hose from the vacuum pump
and from the service port of the 3-way valve.
6. Tighten the service port cap at a torque of 18 N.m with
a torque wrench.
7. Remove the valve caps of the 2-way valve and the 3-
way valve. Position both of the valves to “open” using
a hexagonal wrench (4 mm).
a hexagonal wrench (4 mm).
8. Mount the valve caps onto the 2-way and 3-way valves.
•
Be sure to check for gas leakage.
Caution
If gauge needle does not move from 0 cmHg to -76
cmHg in step (3) above, take the following measures:
cmHg in step (3) above, take the following measures:
If the leaks stop when the piping connections are
tightened further, continue working from step (3).
tightened further, continue working from step (3).
If the leaks do not stop when the connections are
retightened, repair the location of the leak.
retightened, repair the location of the leak.
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CS-MA95KE CU-MA185KE / CS-MA125KE CU-MA245KE / CS-MA75KE / CS-MA125KE CU-MA195KE
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