Panasonic Cs A18ekh Cs A24ekh Cu A18ekh Cu A24ekh Repair Manual

31 • The operation mode judging temperature and standard setting temperature can be increased by 2°C permanently, by open the
circuit of JX03 at printed circuit board indoor unit.
11.5. Operation Control
(For 11.5.1. to 11.5.7. information applies only to Cooling and Soft Dry Operation)
11.5.1. Restart Control (Time Delay Safety Control)
• When the thermo-off temperature (temperature which compressor stops to operate) is reached during:-
- Cooling operation - the compressor stops for 3 minutes (minimum)...

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11.5.4. 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 Delay Safety Control)...

33 b. QLo fan speed
Dew formation may occurs at QLo cool, therefore QLo cool is operated only 1 hr 30 min (1 hr QLo, 30 min QLo +100
rpm). After that, it operates at QLo +180rpm (However Quiet LED remains on).
2. Norrowing
Vertical Airflow Direction
–During Anti-dew condensation prevention, Airflow Direction Auto-control angle change from 10° - 38° to 10° - 27° under
Cooling and Soft Dry operation mode.
–During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 10°, 14°,...

34 –During Anti-dew condensation prevention, Airflow Direction Manual control angle change from 0°, 11°, 22°, 33°, 44° to
14°, 18°, 22°, 26°, 30° under Cooling and Soft Dry operation mode.
(For 11.5.8 to 11.5.14 information applies only to Heating Operation)
11.5.8. Restart Control (Time Delay Safety Control)
• When the thermo-off temperature (temperature which compressor stops to operate) is reached during:-
- Heating operation - the compressor stops for 3 minutes (minimum) before resume operation.
• If...

35
11.5.11. 4-Way Valve Control
• 4-way valve always on during Heating operation. (except deicing operation)
• When the unit is switched off by remote control during Heating operation, the 4-way valve stay at Heating position for 5 minutes.
• This is to prevent the refrigerant flow process sound for being occur.
11.5.12. Hot Start Control
• Hot Start Control is to prevent cool air discharge into the room when heating operation start.
• When Heating operation starts, Indoor fan will not start until the...

36 a) Normal Deicing Time Diagram
(b) Overload Deicing Time Diagram 

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11.6. Indoor Fan Speed Control
• Indoor Fan Speed can be set using remote control.
11.6.1. Fan Speed Rotation Chart
11.6.2. 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, Me and Lo-.
- Deodorizing Control will be activated.
Speed
CS-A24EKH CS-A18EKH
Cool, Dry Heat
S Hi Hi 1650 1430
Hi 1570 1400
Me Me 1480 1320
Lo+ Lo 1380 1270
Lo 1280 1190
Lo- Lo- 1070 980
S Lo S Lo...

38 • 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 room temperature to achieve the setting temperature quickly.
4. During compressor stop,...

39
11.6.3. 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.
11.7. Outdoor Fan Speed Control
• There is 2 speed for outdoor fan motor. Outdoor fan speed can be changed to Hi or Lo according to outdoor temperature.
• For Cooling or Soft Dry operation when outdoor temperature reaches to 31°C (Hi-speed), 29°C (Lo-speed).
• For Heating operation when outdoor...

40
11.9. Horizontal Airflow Direction Control
11.9.1. Auto Control
• When the horizontal airflow direction is set to Auto using the
remote control, the vanes swings left and right for Cooling
and Soft Dry (0°-44°), Heating (8°-36°) as shown in the
diagram.
• When stopped with remote control, the discharge vane is
reset, and stop at the reset position.
• During Cooling operation or Soft Dry operation, indoor fan
motor may stop to rotate at certain periods. At that condition,
the vane will stop swinging...