Panasonic Cs W7bkp Cs W9bkp Cs W12bkp Repair Manual

							11.2.6. 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 cannot be charged with the specified
amount of refrigerant, it can be charged with a little at a
time (approximately 150 g each time) while operating
the air conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1 minute and
then repeat the procedure. (pumping down-pin)
This is different from previous procedures. Because you are
charging with liquid refrigerant fromthe gas side, absolutely do
no attempt to charge with large amount of liquid refrigerant
while operating the air conditioner.
 4. Immediately disconnect the charge hose from the 3-
way valve’s service port.
 • Stopping partwaywill allow the refrigerant to be
discharged.
 • If the system has been charged with liquid refrigerant
while operating the air conditioner, turn off the air
conditioner before disconnecting the hose.
 5. Mount thevalve stemcaps and the service port cap.
 • Use torque wrench to tighten the service port cap to a
torque of 18 N.m.
 • Be sure to check for gas leakage.
Procedure:
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							12.1. Indoor Electronic Controllers
Removal Procedures
 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 releasing the 2 hooks at the
top of the Front Grille. (Fig. 1)
 • Remove the Control Board Cover by releasing 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)
 • Release the hook that hold the Electronic Controller.
(Fig. 3)
12.2. Indoor Fan Motor and Cross
Flow Fan Removal Procedures
 • Remove the Control Board by:-
 − Releasing CN-REC/DISP connectors. (Fig. 4)
 − Releasing CN-FM connectors. (Fig. 4)
 − Releasing CN-STM connector. (Fig. 4)
 − Removing the Earth Wire screw. (Fig. 4)
 − Releasing the Intake Air Sensor. (Fig. 4)
 − Releasing the Piping Sensor. (Fig. 4)
Fig. 1
Fig. 2
Fig. 3
Fig. 4
12 Servicing Information
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							 − 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)
 − 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 the Fan Motor as shown in the Fig. 7.
Fig. 5
Fig. 6
Fig. 7
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							 − 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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							 • Remote Control Reset
When the batteries 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 two indoor units are installed in the same room, in
order to prevent operating errors caused by using two
remote controls, cut a jumper wire at the remote control
printed circuit board (J - A) and cut a jumper wire at the
indoor printed circuit board (JX4). It is possible to select
from 4 types oftransmission codes including one at time of
delivery condition (0).
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							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
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							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 current, and temperature fifteen minutes after an operation is started.
13.1.2. Diagnosis methods of a malfunction of a compressor and 4-way valve
Nature of faultSymptom
 • Electric current during operation becomes approximately 20% lower than the normal value.
Insufficient compressing of a compressor • The discharge tube of the compressor becomes abnormallyhot (normally 70 to 90°C).
 • The difference between high pressure and low pressure becomes almost zero.
 • Electric current reaches a high level abnormally, and the value exceeds the limit of an
ammeter. In some cases, a breaker turns off.
Locked compressor
 • The compressor is a humming sound.
 • Electric current during operation becomes approximately 80% lower than the normal value.
Insufficient switchesof the4-way valve
 • The temperature different between from the discharge tube to the 4-way valve and from
suction tube to the4-way valve becomes almost zero.
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							14 Technical Data
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							230VOutdoor Temp. (°C)
Indoor wet
bulb temp.30354046
TCSHCIPTCSHCIPTCSHCIPTCSHCIP
17.0°C2.361.790.602.211.720.652.051.650.701.871.570.75
19.0°C2.380.66
19.5°C2.591.870.622.421.800.662.251.730.712.051.650.76
22.0°C2.831.940.632.641.870.672.461.800.722.231.720.78
230VOutdoor Temp. (°C)
Indoor wet
bulb temp.30354046
TCSHCIPTCSHCIPTCSHCIPTCSHCIP
17.0°C2.882.180.782.692.090.842.502.010.902.271.910.97
19.0°C2.900.85
19.5°C3.162.280.792.952.190.852.752.110.912.502.010.98
22.0°C3.442.370.813.222.280.872.992.200.932.722.091.00
230VOutdoor Temp. (°C)
Indoor wet
bulb temp.30354046
TCSHCIPTCSHCIPTCSHCIPTCSHCIP
17.0°C3.712.811.013.472.701.083.222.591.162.932.461.25
19.0°C3.741.10
19.5°C4.072.941.033.812.831.103.542.721.183.222.591.27
22.0°C4.443.051.054.152.941.123.862.831.203.512.701.30
TC - Total Cooling Capacity(kW)Indoor 27°C/19°C
SHC - Sensible Heat Capacity(kW)Outdoor 35°C/24°C
IP - Input Power(kW)
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CS-W7BKP CU-W7BKP5 / CS-W9BKP CU-W9BKP5 / CS-W12BKP CU-W12BKP5