Panasonic Cs A18ekh Cs A24ekh Cu A18ekh Cu A24ekh Repair Manual

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11.10. 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...

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11.11. 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...

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...

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11.13. 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.
•...

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12 Servicing Mode
12.1. Auto OFF/ON Button
• The “Auto OFF/ON Button” (behind the front grille) is used to operate the air conditioner if remote control is misplaced or mal-
functioning.
• Forced cooling operation is possible by pressing the “Auto OFF/ON Button” for more than 5s where “beep” sound is heard then
release the button.
• User able to select remote control transmission code and toggle remote control signal receiving sound under various setting
mode.
• To enter various setting mode:
- Press...

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12.2.2. CLOCK
• To change the remote controls clock-hour and minute.
- Press once to enter the clock setting mode.
- Use timer increment button timer decrement button to change the time.
- Press once again to exit the setting mode.
• To change the time format (24 hours & 12 hours timer display).
- Press for more than 5 seconds,
12.2.3. RESET
• To clear and restore the remote control setting to factory default.
- Press for once to clear the memory.
12.2.4. TIMER “▲”
• Press continuously for 5 seconds,...

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13 Troubleshooting Guide
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 on the right. 

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13.1.1. Relationship between the condition of the air conditioner and pressure and electric
current
• 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
Cooling Mode Heating Mode
 
Low Pressure High PressureElectric current 
during operatingLow Pressure High PressureElectric current 
during operating Condition of the air 
conditioner
Insufficient refrigerant...

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14 Disassembly and Assembly Instructions
14.1. Indoor Electronic Controllers, Cross Flow Fan and Indoor Fan Motor
Removal Procedures
14.1.1. To remove the Front Grille
• Remove the 3 caps and 3 screws at the bottom of the Front
Grille. (Fig. 1)
• Remove the Front Grille by releasing the 3 hooks at the top
of the Front Grille. (Fig. 1)
• Unhook the tabs at the Control Board to remove the Control
Board Cover. (Fig. 2)
Fig. 1
Fig. 2
14.1.2. To remove the Main Electronic Controller
• Release the 2...

50 • Release the CN-DATA1 connector. (Fig. 5)
• Release the CN-SONIC connector. (Fig. 5)
• Release the CN-STM2 connector. (Fig. 5)
• Release the CN-STM1 connector. (Fig. 5)
• Release the CN-TH connector. (Fig. 5)
Fig. 5
14.1.3. To remove the Power Electronic Controller
• Release the hook that hold the Particular Piece and pull out
the Power Electronic Controller. (Fig. 6)
• Release the AC-303 connector. (Fig. 7)
• Release the CN-FM connector. (Fig. 7)
• Release the 2 connector P Terminal (BROWN) and L...