Panasonic Cs C9dkzw Cu 2c18dkh Cu 3c20dkh Repair Manual

(Gas leakage)
 1. Confirm that both the 3-wayvalves are setto the open
position.
 2. Connect the charge set tothe Gas side3-way valve’s
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(Lo side) on the charge set and
discharge the refrigerant until the gauge indicates 0
kg/cm
2G.
 • If there is no air the refrigeration cycle [the pressure
when the air conditioner is not running is higher than 1
kg/cm
2G], discharge the...

(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 -76
cmHg [vacuum of 4 mmHg or less].
 3. Close thevalve (Loside) 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 vacuum pump...

(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.
 • If you are using a gas cylinder, also use a scale and
reverse the cylinder so that the system can be charged
with liquid.
 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). The...

 • Electronic Controller and Display Complete unit can be
seen by following the below removal procedures
Fig. 1
 − Remove the 2 caps and 2 screws at the bottom of the
Front Grille. (Fig. 1)
Fig. 2
 − Remove the Front Grille Complete. (Fig. 2)
Fig. 3
 − Release the taps on top and on the right side of metal
plate cover. (Fig. 3)
 − Then remove the metal plate cover. (Fig. 3)
 − Remove the indicator complete screw, and then remove
the indicator complete. (Fig. 3)
12 Servicing Information
12.1. Distinction...

Fig. 4
 − To remove the electronic controller.
 − Remove the particular piece (Fig. 4)
 − Release CN-FM connector (Fig. 4)
 − Release CN-Sonic connector (Fig. 4)
 − Release CN-FB connector (Fig. 4)
 − Release CN-ION connector (Fig. 4)
 • Remove Control Board cover
Fig. 6
 − Remove the screw on the left side of the unit. (Fig. 6)
 − Pull the hook to the left and lift up the evaporator. (Fig.
6)
 − Pull down the Discharge Grille Complete. (Fig. 6) − Release CN-TH connector (Fig. 4)
 − Release CN-STM...

 − Remove the earth wire from the evaporator (Fig. 7)
 − Release the generator complete wire (green and red).
(Fig. 8)
 − Remove 2 screws on the right and 1 screw at the left
side of the control board. (Fig. 7)
 − Press down the hook on the left side of control board.
(Fig. 7)
 − Then pull out the Control Board Complete from the unit.
(Fig. 7)
Fig. 9
 − Remove the cross flowfan bushing from the chassis.
(Fig. 9)
 − Loosen the fan boss screw at the cross flow fan. (Fig. 9)
Fig. 10
 − Push up the...

 • When the batteries are inserted for the first time or the
batteries are replaced, you may notice the indications at
remote control’s display screen blink continuosly and not
functionable. If this condition happens, try to reset the
remote control by pushing the reset terminal with a pointing
device.
 • You may also do the reset to erase the setting at remote
control and restore back the default setting.
12.4.2. Remote Control Transmission Code
 • There are 4 type ofremote control transmission code...

13.1. Refrigeration cycle system
In order to diagnose malfunctions, make sure that there are no
electrical problems before inspecting the refrigeration cycle.
Such problems include insufficient insulation, problem with the
power source, malfunction of a compressor and a fan.
The normal outlet air temperature and pressure of the
refrigeration cycle depends on various conditions, the standard
values for them are shown in the table to the right.
13 Troubleshooting Guide
58
CS-C9DKZW CU-2C18DKH / CS-C9DKZW...

13.2. Relationship between the condition of the air conditioner and
pressure and electric current
Cooling Mode
Condition of the air
conditionerLow 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 current, and temperature fifteen minutes after an operation is started.
13.3....

14 Technical Data
14.1. Thermostat characteristics
14.2. Operation characteristics
14.2.1. CS-C9DKZW CU-2C18DKH
60
CS-C9DKZW CU-2C18DKH / CS-C9DKZW CU-3C20DKH