Panasonic Cs W7ckp Cs W9ckp Cs W7ckp Series Repair Manual

Precau tions
 • Be sure to read the instructions for the vacuum pump,
vacuum pump adaptor and manifold gauge prior to use,
and follow the instructions carefully.
 • Make sure that the vacuum pump is filled with oil up to
the designa ted line on the oil gauge.
 • The gas pressure back flow prevention valve on the
charging hose is generally open during use.When you
are removing the charging hose from the service port, it
will come off moreeasily if you close this valve.
Fig. 12 Vacuum pump air purging...

11.4.2. Transferring (Using New Refrigerant Piping)
 1. Removing the unit
 a. Collecting the refrigerant into the outdoor unit by pumping down
The refrigerant can be collected into the outdoor unit (pumping down) by pressing the TEST RUN button, even when the
temperature of the room is low.
 • Check to make sure that the valve stems of the 2-way valve and 3-way valve have been opened by turning them counter-
clockwise. (Remove the valve stem caps and check to see that the valve stems arefully opened...

 5. Set the refrigerant cylinde r onto the electronic scale, then correct the hose the cylinde r and to the connection port for the
electronic scale. (1)(2)
Precau tion:
Be sure to set up the cylinde r for liquid charging. If you use a cylinde r equipped with a siphon tube, you can charge the liquid
without having to turn the cylinde r around
 6. Remove the charging hose of the manifold gauge from the vacuum pump adaptor, and connect it to the connection port of the
electronic scale. (2)(3)
 7. Open the...

 1. Attach a reducing valve to the nitrogen gas cylinde r.
 2. Attach a reducing valve to the nitrogen gas cylinde r.
 3. Apply a seal onto the clearance between the piping and inserted pipe for the nitrogen gas in order to prevent the nitrogen gas
from flowing backward.
 4. When thenitrogen gas is flowing, be sure to keep the piping end open.
 5. Adjust the flow rate of nitrogen gas so that it is lower than 0.05 m
3/h, or 0.02 MPa (0.2 kgf/cm2) by means of the reducing valve.
 6. After taking the steps...

 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 releasin g the 2 hooks at the
top of the Front Grille. (Fig. 1)
 • Remove the Control Board Cover by releasin g 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)
 •...

 − 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)
 − Releasin g 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...

 − 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
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CS-W7CKP CU-W7CKP 5 / CS-W9CKP CU-W9CKP 5 / CS-W12CKP CU-W12CKP5 

 • Remote Control Reset
When thebatteries are inserted for the first time, or the
batteries are replaced, all the indications will blink and the
remote control might not work.
If this happen , remove the cover of the remote control and
you will find a resetting terminal, and by shorting it with a
minus screwdriver, it will return to normal.
 • Changing the wireless remote control transmission
code
When twoindoor units are installed in the same room, in
order to prevent operating errors caused by using...

In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insuffic ient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depend s on various conditio ns, the standard
values for them are shown in the table to the right.
13 Troubleshooting Guide
13.1. Refrigeration cycle system
69
CS-W7CKP CU-W7CKP 5 / CS-W9CKP...

13.1.1. Relationship between the condition of the air conditioner and pressure and
electric current
Cooling ModeHeating Mode
Condition of the air
conditonerLow PressureHigh PressureElectric current
during operationLow PressureHigh PressureElectric current
during operation
Insufficient refrigerant
(gas leakage)
Clogged capillary tube
or Strainer
Short circuit in the
indoor unit
Heat radiation
deficiency of the
outdoor unit
Inefficient compression
 • 
Carry out the measurements of pressure, electric...