Panasonic Cs C9dkzw Cu 2c18dkh Cu 3c20dkh Repair Manual

							8.4.5. Anti-Freezing Control
 • If the temperature of the indoor heat exchanger falls below 2°C continuously for 4 minutes or more, the compressor turns off.
The fan speed setting remains the same.
 • This phenomenon is to protect the indoor heat exchanger from freezing and to prevent higher volume of refrigerant in liquid form
returning to the compressor.
 • Compressor will restart again when the indoor heat exchanger temperature rises to 10°C (Recovery).
 • Restart control (Time DelaySafety Control)will be applied in this Control if the recovery time is too short.
8.4.6. Compressor Reverse Rotation Protection Control
 • If the compressor is operating continuously for 5 minutes or longer and the temperature difference between intake air and
indoor heat exchanger is 2.5°C or less for continuous2 minutes, compressor willstop and restart automatically.
 • Time Delay Safety Control isactivated before the compressor restart.
sT = Intake air temperature - Indoor heat exchanger temperature
 • This is to prevent compressor from rotate reversely when there is an instantaneous power failure.
8.4.7. Anti-Dew Formation Control
 • Purpose is to prevent dew formation on indoor unit air discharge area.
 • When room temperature is constant (±1°C) the following condition occur for 30 minutes continuously, anti-dew formation will
activate:
 − Indoor intake temperature is more than 24°C and less than 30°C.
 − Remote Control setting temperature is less than 25°C.
 − Compressor is on.
 − Cooling operation mode.
 − Indoor Fan motor operate at Low fan speed or QLo.
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							 • Anti-Dew Formation is control by:
 • Increasing Air Flow Volume
 1. Lo fan speed
Lo fan speed is changed to Lo+ after 30 min to prevent dew formation.
 2. QLo fan speed
Dew formation may occurs at QLo cool, therefore QLocool is operated only 1 hr 30 min (1hr QLo, 30 min QLo + 80 rpm).
After that, it operates at QLo +160rpm (However Quiet LED remains on).
 • Narrowing
 1. Vertical Airflow Direction
During Anti-dew condensation prevention, Airflow Direction Auto-control angle change from 0° - 32° to 20° - 30° under
Cooling and Soft Dry operation mode.
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							During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 10°, 15°, 20°, 32° to 22°, 24°,
26°, 28°, 30°.
8.5. Indoor Fan Speed Control
 • Indoor Fan Speed can be set using remote control.
8.5.1. Fan Speed Rotation Chart
SpeedFan Speed (rpm)
CS-C9DKZW
SHi1250
Hi1160
Me920
HLo840
CLo750
Lo-750
SLo710
QHi1060
QMe820
QLo650
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							8.5.2. Automatic Fan Speed Control
 • When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table.
 − Fan speed rotates in the range of Hi and Me.
 − Deodorizing Control will be activated.
 • Auto Fan Speed during cooling operation:
 1. Indoor fan will rotate alternately between off and on as shown in below diagram.
 2. At the beginning of each compressor start operation,indoor fan will increase fan speed gradually for deodorizing purpose.
 3. For the first time the compressor operate, indoor fan will be switched to Hi fan speed from Lo- after 70 seconds from the
start of compressor. This cause the roomtemperature to achieve the setting temperature quickly.
 4. During compressor stop, indoor fan will operate at Lofor the beginning 20 seconds to prevent higher volume of refrigerant
in liquid form returning to the compressor.
 5. After the compressor at turn off condition for 3 minutes, indoor fan will start to operate at Lo- to circulate the air in the room.
This is to obtain the actual reading of the intake air temperature.
 6. For the resume of compressor operation, indoor fan willoperate at Me fan speed to provide comfort and lesser noise
environment, after 70 seconds from the restart of compressor.
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							 • When the vertical airflow direction is set to Auto using the
remote control, the louver swings up and down as shown in
the diagram.
 • When stop operation using the remote control, the
discharge vent is reset, and stop at the closing position.
 • During Cooling operation or Soft Dry operation, indoor fan
motor may stop to rotate at certain periods. At that
condition, the louver will stop swinging and rest at the upper
limit.
 • When the vertical airflow direction is set to Manual using the
remote control, the automatic airflow is released and the
airflow direction louver move up and down in the range
shown in the diagram.
 • The louver can be adjusted by pressing the button to the
desired louver position.
 • When stop operation using the remote control, the
discharge vent is reset, and stop at the closing position.
Auto Fan Speed during Soft Dry operation:
 1. Indoor fan will rotate alternately between off and Lo-.
 2. At the beginning of each compressor start operation,indoor fan will increase fan speed gradually for deodorizing purpose.
 3. When compressor at turn off condition for 6 minutes, indoor fan will start fan speed at Lo- to circulate the air in the room.
This is to obtain the actual reading of intake air temperature.
8.5.3. Manual Fan Speed Control
 • Manual fan speed adjustment can be carried out by using the Fan Speed selection button at the remote control.
 • There are 3 types of fan speed settings: Lo, Me, Hi.
8.6. Outdoor Fan Speed Control
 • There is only onespeed for outdoor fan motor.
 • When the air conditioner is turned on, the compressor and the outdoor fan will operate simultaneously.
 • Likewise, both compressor and outdoor fanwill stop at the same time if the unit is turned off.
8.7. Vertical Airflow Direction Control
8.7.1. Auto Control
8.7.2. Manual Control
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							8.8. Horizontal Airflow Direction Control
 • The horizontal airflow direction louvers can be adjusted manually by hand.
8.9. Powerful Operation
 • The Powerful operation is to achieve the setting temperature quickly.
 • When Powerful operation is set, the setting temperature will be automatically decreased 3°C internally against the present
setting temperature (Lower temperature limit: 16°C).
 • This operation automatically will be running under SHi Fan Speed (Cooling), Lo- Fan Speed (Soft Dry).
 • Vertical Airflow Direction:-
- In “Manual” setting, the vane will automatically shift down 10° lower than previous.
- In “Auto” setting, the vane will automatically swing up and down. However the lower limit will be shifted 10° downward.
 • Powerful Mode will operate for 15 minutes only and operation will shift back to previous setting mode.
 • Powerful operation stops when:-
- Powerful mode button is pressed again.
- Stopped by OFF/ON operation button.
- Timer OFF activates.
- Quiet mode button is pressed.
- Operation mode button is changed.
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							8.10. Quiet Operation
(For Cooling Operation or cooling region of Soft Dry Operation)
 • The Quiet operation is to provide quiet/cooling operation condition compare to normal operation.
 • Once the Quiet Mode is set at the remote control, the Quiet Mode LED illuminated. The sound level will reduce around 2 dB(A)
for Lo fan speed or 3 dB(A) for Hi/Me fan speed against the present operation sound level.
 • Dew formation become severe at Quiet Lo cool, therefore Quiet Lo coolis operated only 1hr 30 min(1hr QLo, 30 min QLo +
80 rpm). After that, it goes back to Lo cool (However Quiet LED remains on).
 • Manual Airflow Direction:-
 − RPM control during Lo cool
 − RPM control during Hi & Me cool
 • Auto Airflow Direction:-
 • Quiet operation stops when:-
 − Quiet button is pressed again.
 − Stopped by OFF/ON operation button.
 − Timer OFF activates.
 − Powerful button is pressed.
 − Operation mode button is changed.
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							8.11. Ionizer Operation
 • The Ionizer operation is to provide fresh air effect to user by producing minus ion in discharge air.
8.11.1. Operation Control
 1. Ionizer individual operation
 a. When air-conditioner unit is at “OFF” condition (standby) and ION operation button at the remote control is pressed, the
Ionizer operation will turn on. Only ION LED will illuminates. Power LED maintain off. (1→2)
 b. Ionizer individual operation can be turned off by pressing the ION button again. (2→1)
 c. Fan speed can be adjusted later by customer during this operation.
 d. Vertical airflow direction can be adjusted using remote control during Ionizer individual operation.
 e. During Ionizer individual operation, operated mode (Auto, Cool,Dry, Fan) can be activated by turning on the OFF/ON
operation button. (2→4)
 f. If power failure occur during Ionizer individual operation,after power resume, Ionizer operation will be activated immediately.
 g. When the Ionizer circuit feedback process error occur for 24 times (about 11hr 30 min.), Ionizer operation will turn off with
ION LED blinks continuously.
(For details, please refer to Ionizer Error detection control)
 2. Operation mode & Ionizer operation.
 a. When air-conditioner unit is at “ON” condition and ION operation button at the remote control is pressed, the Ionizer
operation will turn on. ION & Power LED will illuminate. (3→4)
 b. Ionizer operation stops when:
 • ION operation button is press again.
 • Stopped by OFF/ON operation button.
 • Timer OFF activates.
 • Ionizer circuit feedback signal shows error.
 c. Ionizer operation status is not memorised when the air conditioner has been switched off. The air-conditioner will operate
without ionizer operation when it is turned on again. However, if power failure occurs during Ionizer operation together with
Cooling operation, air-conditioner will start to operate at Cooling operation with Ionizer operation when the power is
resumed.
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							8.11.2. Error Detection Control
 • The error detection control is to inform user that erroroccurs at ionizer system and repairing job will be needed.
 • There are two types of error detection control:
a. When Ionizer is ON
 − If ionizer feedback = Lo for 24 times within 11hr 30min, ION LED blinks continuously.
b. When ionizer is OFF
 − If ionizer feedback = Hi,ION LED blinks continuously.
 • During ionizer at breakdown condition, if ionizer feedback voltage = Lo (become normal), ION LED will stop blinking.
 • The error detection control can be reset by:
i) Pressing the OFF/ON operation button to switch the operation OFF.
ii) Pressing the Auto Operation button to force the operation OFF.
iii) Setting the OFF Timer to stop the operation (Not applicable when ionizer is OFF).
8.12. Timer Control
 • There are 2 types of timer, ON and OFF timer.
 • Both ON and OFF timer can be set by pressing ON or OFF button respectively.
 • By pressing ON/OFF operation button, ON Timeror OFF Timer will not be cancelled.
 • To cancel the previous timer setting, press CANCEL button.
 • To activate the previous timer setting, press SET button once again.
 • If main power supply is switched off, the timer setting will be cancelled.
8.12.1. ON Timer
 • When ON Timer is set by using the remote control, the unit will start to operate slightly before the set time, so that the room will
reach nearly to the set temperature by the set time.
 • For Cooling and Soft Dry operation, the operation will start 15 minutes before the set time.
 • For Automatic operation, the indoor fan will operate at SLo speed for 25 seconds, 30 minutes before the set time to detect the
intake air temperature to determine the operation mode. The operation indication lamp will blink at this time.
8.12.2. OFF Timer
 • When OFF Timer is set by using the remote control, the unit will stop operate according to the desired setting.
8.13. Random Auto Restart Control
 • If there is a power failure during operation, the air conditioner will automatically restart after 3 to 4 minutes when the power is
resumed.
 • It will start with previous operation mode and airflow direction.
 • If there are more than one air conditioner unit in operation and power failure occur, restart time for each unit to operate will be
decided randomly using 4 parameters:- intake air temperature, setting temperature, fan speed and air swing louver position.
 • This Random Auto Restart Control is not available when Timer is set.
 • This control can be omitted by open the circuit of JX2. (Refer Circuit Diagram)(Indoor PCB)
8.14. Remote Control Signal Receiving Sound
 • Long beep sound will be heard when:-
 − Stopping the air conditioner using ON/OFF switch.
 − Stopping the Quiet Mode.
 − Stopping the Powerful Mode.
 − Stopping the Ion Mode.
 • Short beep sound will be heard for others setting.
 • To switch off the beep sound:-
Press the “Auto Operation Button” (behind the front grille) continuously for 10 seconds or more (“beep” “beep” will be heard at
the 10th second). Repeat the above if you want to switch on the beep sound.
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							9 Operating Instructions
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