Panasonic Cs A18gkd Cs A18gkd Cu A18gkd Cu A24gkh Repair Manual

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12.10. Powerful Operation
• The Powerful operation is to achieve the setting temperature quickly.
(Cooling and Soft Dry Operation condition)
• 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).
• Vertical Airflow Direction:-
- In “Manual” setting, the vane will automatically shift down 10° lower than previous setting.
- In “Auto” setting, the vane will automatically swing up and down. However the lower limit will be shifted 10° downward.
(Heating Operation condition)
• When Powerful operation is set, the setting temperature will be automatically increased 3°C against the present setting
temperature (Higher temperature: 30°C).
• The Fan Speed will shift as shown below:
• Vertical Airflow Direction:-
- In “Manual” setting, the vane will automatically shift down 5° lower than previous setting.
- In “Auto” setting, the vane will automatically shift between upper and lower limit depending on the intake air temperature as
Heating Mode, Airflow Direction Auto-Control. However the upper and lower limit will be shifted 5° downward.
• Powerful operation stops when:-
- Powerful operation has operate for 15 minutes.
- Powerful button is pressed again.
- Quiet button is pressed
- Stopped by OFF/ON operation button.
- Timer OFF activates.
- Operating mode is changed. 
						

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12.11. Quiet Operation
• The Quiet operation is to provide quiet cooling/heating operation condition compare to normal operation.
(Cooling and Soft Dry Operation condition)
• Once the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB(A)
for Lo fan speed or 3 dB(A) for Hi/Me fan speed against the present sound level operation.
• Dew formation become severe at Quiet Lo cool, therefore Quiet Lo cool is operated only 1hr 30 min (1hr QLo, 30 min QLo + 100
rpm). After that, it goes back to QLo +180 rpm (However Quiet LED remains on).
• Manual Fan Speed:-
- RPM control during Lo cool
- RPM control during Hi & Me cool
- Auto Fan Speed:- 
						

							43 (Heating Operation condition)
• When the Quiet Mode is set at the remote control, Quiet Mode LED illuminates. The sound level will reduce either around 2 dB
(Lo) or 3 dB (Hi, Me), against the present sound level operation.
• Quiet setting of fan speed rpm refer to Indoor Fan Speed Control.
• Manual Fan Speed:-
- Rpm control during Lo, Me & Hi Cool
• Auto Fan Speed:-
- Rpm control depends on the piping air temperature sensor of Indoor heat exchanger
• Quiet operation stops when:-
- Quiet/Powerful button is pressed again.
- Stopped by OFF/ON operation button.
- Timer OFF activates.
12.12. Timer Control
12.12.1. ON Timer
• When the 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 Heating operation, the operation will start 30 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.
12.12.2. OFF Timer
• When the OFF Timer is set by using the remote control, the unit will stop operate according to the desired setting.
Notes
1. By pressing ON/OFF operation button, the ON Timer or OFF Timer setting will not be cancelled.
2. To cancel the previous timer setting, press CANCEL button.
3. To activate the previous timer setting, press SET button.
4. If main power supply is switched off, the Timer setting will be cancelled. 
						

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12.13. 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 JX02. (Refer printed circuit board indoor unit)
12.14. Remote Control Signal Receiving Sound
• Long beep sound will be heard when:
- Stopping the air conditioner using ON/OFF switch.
• Short beep sound will be heard for others setting.
12.15. Patrol Operation
A. Purpose
To monitor air dirtiness level by using gas sensor and activates e-ion operation whenever air is dirty.
B. Control Condition
a. Patrol operation start condition
• When the unit operation is started with “OFF/ON” button.
• When the unit stops, “Patrol” button is pressed, Patrol individual operation will start.
• During cooling only operation, “Patrol” button is pressed.
b. Patrol operation stop condition
When any of the following condition is fulfilled:
• When “OFF/ON” button is pressed.
• During any operation with Patrol, Patrol button is pressed again. 
• When “e-ion” button is pressed.
• When OFF Timer activates. 
						

							45 c. Patrol operation disable
• To disable the Patrol Operation during unit start (default) with “OFF/ON” button, press “Patrol” button and hold for 5
seconds, then release.
• To disable the Patrol Operation, press “Patrol” button and hold for 15 seconds, then release.
C. Control Content
a. Gas Sensor Control
• First 2 minutes from Patrol function activates is stabilization time, during stabilization time, no air dirtiness level is
monitored. The Air Dirtiness level is set to level 2.
• After that, gas sensor starts to record the resistance value at fixed interval. Higher resistance value indicates cleaner air.
• The air dirtiness level is monitored by comparing the current resistance value with maximum resistance value from time to
time to get the Air Dirtiness Value.
• There are 3 air dirtiness level, based on the Air Dirtiness Value:
- Air Dirtiness level 0: Clean
- Air Dirtiness level 1: Moderate
- Air Dirtiness level 2: Contaminated
• Dirtiness level sensitivity adjustment.
It is possible to change the gas sensor sensitivity, where the Threshold value (G1 ~ G4) will be shifted accordingly:
1. Press and release “SET” button.
2. Press “Timer increment” / “Timer decrement” button to select sensitivity. (Low  Standard (Default)  High)
3. Confirm setting by pressing “Timer Set” button. LCD returned to original display after 2 seconds.
4. LCD returned to original display if remote control does not operate for 30 seconds.
b. e-ion Control
• When dirtiness level is 1 or 2, e-ion operation starts.
• If dirtiness level improves from level 2 to level 1, the unit carries out level change after 60 seconds.
• When dirtiness level returns to level 0 continuously for 10 minutes or more, e-ion operation stops.
Dirtiness Level Shift
• For Auto Fan Speed, the fan speed increased based on dirtiness level:
c. Indoor Fan Control
• During any operation mode combines with Patrol operation, fan speed follows respective operation mode.
• During Patrol individual operation if e-ion starts, only Auto Fan Speed and no Powerful operation is allowed. Even if “Fan
Speed” button is pressed, no signal is sent to air conditioner, and no change on LCD display.
• During Patrol individual operation if e-ion stops, Indoor Fan stop operation.
d. Airflow direction (Horizontal, Vertical) Control
• During any operation mode combines with Patrol operation, air flow direction follows respective operation mode.
• During Patrol individual operation if e-ion starts, only Auto Air Swing is allowed. Even if “Air Swing” button is pressed, no
signal is sent to air conditioner, and no change on LCD display.
• During Patrol individual operation if e-ion stops, Airflow direction louver closed. 
						

							46 e. Indicator
• When Patrol operation starts, Patrol Sensor indicator ON.
• When e-ion operation starts based on dirtiness level, e-ion indicator ON.
f. Remote Control Receiving Sound
g. Timer Control
• When ON timer activates when unit stops, previous operation resumes without Patrol operation.
• When ON timer activates during any operation, no change and carry on current operation.
• When OFF timer activates during any operation, all operation stops.
h. Power failure
• During Patrol individual operation, if power failure occurs, after power resumes, Patrol individual operation resumes
immediately.
• During combination operation, if power failure occurs, after power resumes combination operation resume immediately.
12.16. e-ion Operation
A. Purpose
This operation provides clean air by producing negative ions to attract dust captured at the positively charged e-ion filters.
B. Control Condition
a. e-ion operation start condition
• During unit running at any operation mode, if “e-ion” button is pressed, combination operation (operation mode + e-ion 
operation) starts.
• During unit is OFF, if “e-ion” button is pressed, e-ion individual operation starts.
b. e-ion operation stop condition
• When “OFF/ON” button is pressed to stop the operation.
• When “e-ion” button is pressed again.
• When “Patrol” button is pressed.
• When OFF Timer activates.
c. e-ion operation pause condition
• When indoor fan stop (during deice, odor cut control, thermostat off, etc.). e-ion operation resume after indoor fan restarts.
• When indoor intake temperature 40°C. e-ion operation resume after indoor intake temperature < 40°C continuously for 30
minutes.
•Normal Operation→Patrol Mode: Beep
•
Patrol Mode→Sto p : Long Beep
•
Patrol Mode→Normal Operation: Beep
•
Sto p →Patrol: Beep 
						

							47 C.Control Content
a. Indoor fan control
• During any operation mode combines with e-ion operation, fan speed follows respective operation mode.
• During e-ion individual operation - only Auto Fan Speed and no Powerful operation is allowed. Even if Fan Speed button is
pressed, no signal is sent to air conditioner, and no change on LCD display.
Auto Fan Speed for e-ion operation switches between HLo and CLo at pattern below:
b. Airflow direction control
• During any operation mode combines with e-ion operation, airflow direction follows respective operation mode.
• During e-ion individual operation, only Auto Air Swing is allowed. Even if Air Swing button is pressed, no signal is sent to air
conditioner, and no change on LCD display.
c. Timer control
• When ON timer activates when unit stops, previous operation resumes without e-ion operation.
• When ON timer activates during any operation, no change and carry on current operation.
• When OFF timer activates during any operation, all operation stops.
d. Indicator
• When e-ion operation starts, e-ion indicator ON.
e. e-ion Check Mode
• To check if e-ion is malfunctioning, during e-ion operation press “e-ion” button for 15 seconds and release to enter e-ion
Check Mode and supplies power to the e-ion Air Purifying System.
• If abnormal discharge is detected at filter (short-circuited) due to water or dust adhesion, etc., the e-ion indicator blinks
immediately.
f. Power failure
• During e-ion individual operation, if power failure occurs, after power resumes, e-ion individual operation resumes immedi-
ately.
• During combination operation, if power failure occurs, after power resumes, combination operation resume immediately.
g. Error Detection Control
When e-ion indicator blink, it indicates error listed below:
i. e-ion Air Purifying system main connector to PCB is open:
Judgement Method
• During e-ion operation (include during Patrol operation), e-ion Air Purifying system main connector to PCB is opened.
Troubleshooting Methods
• Connect the connector or stop operation (include during Patrol operation) to cancel the blinking.
ii. Abnormal Discharge
Judgement Method
• During e-ion operation, when feedback voltage is -Lo (at microcontroller) is detected, it is judged abnormal discharge and 
stops power supplies to the e-ion Air Purifying system.
• The unit retries after 30 minutes and repeat for 24 times. (not applicable for e-ion Check Mode) 
						

							48 Troubleshooting Methods
• Press “e-ion” button or “OFF/ON” button to stop the operation and check the e-ion Air Purifying system main connector to
PCB.
• After that, press “e-ion” button again to confirm the e-ion indicator not blinking.
• The 24 times counter will be clear after 10 minutes of normal operation or when operation stops.
Error Reset Method
• Press “OFF/ON” button to OFF the operation.
• Press AUTO OFF/ON button at indoor unit to OFF the operation.
• OFF Timer activates.
• Press “e-ion” button during e-ion individual mode.
• Power supply reset.
iii. e-ion breakdown
Judgement Method
• When hi-feedback voltage (at microcontroller) supplied to filter during e-ion stop, due to PCB or filter’s high voltage power 
supply damage.
• Operations except e-ion continue. Both Timer indicator and e-ion indicator blink.
Troubleshooting Method
• Press “e-ion” button or “OFF/ON” button to stop the operation.
• Change main circuit board or filter’s high voltage power supply.
• When lo-feedback voltage supplied to e-ion Air Purifying system during e-ion operation, e-ion indicator and Timer indicators 
top blinking. 
						

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13 Servicing Mode
13.1. Auto OFF/ON Button
1. AUTO OPERATION MODE
The Auto operation will be activated immediately once the Auto OFF/ON button is pressed. This
operation can be used to operate air conditioner with limited function if remote control is misplaced or
malfunction.
2. TEST RUN OPERATION (FOR PUMP DOWN/SERVICING PURPOSE)
The Test Run operation will be activated if the Auto OFF/ON button is pressed continuously for more
than 5 seconds. A “beep” sound will occur at the fifth seconds, in order to identify the starting of Test
Run operation.
3. REMOTE CONTROL RECEIVING SOUND OFF/ON MODE
The Remote Control Receiving Sound OFF/ON operation will be activated if (within 20 seconds of Test
Run Operation) the Auto OFF/ON button is pressed for more than 5 seconds. 2 “beep” sounds will occur
at to identify the starting of Remote Control Receiving Sound Off/On Mode.
Press “Auto OFF/ON button” to toggle remote control receiving sound.
• Short “beep”: Turn ON remote control receiving sound.
• Long “beep”: Turn OFF remote control receiving sound.
After Auto OFF/ON Button is pressed, the 20 seconds counter for Remote Control Receiving Sound
OFF/ON Mode is restarted.
13.2. Select Remote Control Transmission Code
• There are 4 types of remote control transmission code could be selected and stored in EEPROM of indoor unit. The indoor unit
will only operate when received signal with same transmission code from remote control. This could prevent signal interference
when there are 2 or more indoor units installed nearby together.
• To change remote control transmission code, short or open jumpers at the remote control printed circuit board.
• During Remote Control Receiving Sound OFF/ON Mode, press any button at remote control to transmit and store the desired
transmission code to the EEPROM. 
						

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13.3. Remote Control Button
13.3.1. SET BUTTON
• To check current remote control transmission code
- Press for more than 10 seconds
• To change the air quality sensor sensitivity
- Press and release with pointer.
- Press the Timer Decrement button to select sensitivity:
1. Low Sensitivity
2. Standard (Default)
3. Hi Sensitivity
- Confirm setting by pressing Timer Set button, a “Beep” sound will be heard. LCD returns to original display after 2 seconds.
- LCD returns to original display if remote control does not operate for 30 seconds
13.3.2. CLOCK BUTTON
• To change the remote control’s time format.
- Press for more than 5 seconds
13.3.3. RESET (RC)
• To clear and restore the remote control setting to factory default
- Press once to clear the memory.
13.3.4. TIMER ▲
• To change indoor unit indicator’s LED intensity
- Press continuously for 5 seconds.
13.3.5. TIMER ▼
• To change remote control display from Degree Celsius to Degree Fahrenheit.
- Press continuously for 10 seconds.