Panasonic Cs E719k Cs E919 Kcs E1219k Repair Manual

10.3.3. CONNECTING THE PIPING
Connecting The Piping To Indoor Unit
Please make flare after inserting flare nut (locate at joint portion
of tube assembly) onto the copper pipe. (In case of using long
piping)
Connec t the piping
 • Align the center of piping and sufficie ntly tighten the flare
nut with fingers.
 • Further tighten the flare nut with torque wrench in specifie d
torque as stated in the table.
Connecting The Piping To Outdoor Unit
MODELPiping size (Torque)
GasLiquid
PC9CK, SC9CK,
E719K,...

(1)*
*Connect the manifold gauge to the service port of 3-way
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.
4(A). Checking gas leakage for the left piping.
10.3.5. CONNECT THECABLE TO THEOUTDOOR UNIT
 1. Remove the control board cover from the unit by looseni ng the screw.
 2. Connec ting cable between indoor unit and outdoor unit shall be approved polychl oroprene sheathed 3 (PC9CK, PC12C...

CHECK THE DRAINAGE
 • Open front panel and remove air filters.
(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.
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 differen ce between the intake temperature and
the discharge is more...

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 manifold
gauge)
EvacuationOpenOpenOpen
(Servicing)Withvacuum pump
Gas...

Required tools: hexagonal wrench, adjustable wrench, torque
wrenches, wrench to hold the joints and gas leak detector.
The addition al 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 cylinde r and the charge set will be
needed .
 1. Recheck the piping connec tions.
 2. Open the valvestem of the 2-wayvalve counter-
clockwise approximately 90°, wait 10second s, and
then set it to closed position.
 • Be sure...

 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 andwait for 3 minutes,then connec t the
charge set to the service port of the 3-way valve.
 • Connect the charge hose with the push pin to the Gas
service port.
 4. Air purging of the charge hose.
 • Open the...

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-way valve.
 • Leave the valve on the charging cylinde r closed.
 3. Air purging.
 • Open the valves on the charging cylinde r and the
charge set. Purge the air by looseni ng the flare nut on
the 2-way valve approximately 45°for 3 seconds then
closing it for 1 minute; repeat 3 times.
 • After purging the...

(Gas leakage)
 1. Confirm that both the 2-way and 3-wayvalves are set to
the open position.
 2. Connect the charge set to the 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 conditio ner is not...

(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. Close thevalve(Low side) on the charge set, turn off
the vacuum pump, and confirm that the gauge needle
does not move (approximately 5 minutes after turning
off the vacuum pump).
 4. Disconnect the charge hose from the vacuum pump.
 • Vacuum pump oil
If the...

11.1.6. Gas charging
(After Evacua tion)
 1. Connect the charge hose to the charging cylinder.
 • Connect the charge hose which you disconn ected from
the vacuum pump to the valve at the bottom of the
cylinde r.
 2. Purge the air from the charge hose.
 • Open the valve at the bottom of the cylinde r 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 the charge set and charge
the systemwith liquid refrigerant.
 • If the...