Panasonic Cs A7dkd Cs A9dkd Cs A12dkd Repair Manual

(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. Closethe valve(Low side) on thecharge 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 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.
 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).
 3. Open the valve(Low side) on thecharge set and charge
the system with liquid refrigerant.
 • If the system...

 • 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.
 − Release CN-FM connectors. (Fig. 4)
 − Release CN-Sonic connector. (Fig. 4)
 − Release CN-FB connector. (Fig. 4)
 − Release CN-ION connector. (Fig. 4)
 − Release CN-TH connector. (Fig. 4)
 − Release CN-STM connector. (Fig. 4)
 − Release CN-REC/DISP connector. (Fig. 4)
 • Remove Control Board Cover
Fig. 6
 − Remove the screw on the left of the unit. (Fig. 6)
 − Pull the hook to the left and lift up the evaporator.
(Fig. 6)
 − Pull down the Discharge Grille...

 − 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 evaporator andremove crossflow fan by
pulling both cross flow...

 • 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 continuously 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.
 − Long “beep”: Turn OFF remote control signal receiving sound.
 • After “Auto OFF/ON Button” is...

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
13.1. Refrigeration Cycle System
67
CS-A7DKD CU-A7DKD / CS-A9DKD...

13.2. 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 current,...

14 Technical Data
14.1. Thermostat Characteristics
14.1.1. CS-A7DKD / CS-A9DKD / CS-A12DKD
69
CS-A7DKD CU-A7DKD / CS-A9DKD CU-A9DKD / CS-A12D KD CU-A12D KD / 

14.2. Operation Characteristics
14.2.1. CS-A7DKD CU-A7DKD
70
CS-A7DKD CU-A7DKD / CS-A9DKD CU-A9DKD / CS-A12D KD CU-A12D KD /