Panasonic Cs A7dkd Cs A9dkd Cs A12dkd Repair Manual

8.3.1. Soft Dry Operation Time Diagram
8.3. Soft Dry Operation
 • Soft Dry operation can be set using remote control.
 • Soft Dry operation is applied to dehumidify and to perform a gentle cooling to the room.
 • This operation starts when the intake air temperature sensor reaches the setting temperature on the remote control.
 • W hen operation begins, Soft Dry will be switched “ON” for a maximum 10 minutes, then Soft Dry operation will be turned “OFF”
for a minimum 6 minutes. After that, the Soft Dry...

8.4. Automatic Operation
 • Automatic operation can be set using remote control.
 • This operation starts to operate with indoor fan at SLo speed for 25 seconds to judge the intake air temperature.
 • After judged the temperature, the operation mode is determined by referring to the below standard.
 • Then, the unit start to operate at determined operation mode, until it is switched off using remote control, with the setting
temperature as shown in below table.
 • Operation mode will be determine again...

 • The operation mode judging temperature and standard setting temperature canbe increased by 2°C permanently, by open the
circuit of JX1 at indoor electronic controller.
8.5. Operation Control
8.5.1. Restart Control (Time Delay Safety Control)
 • When the thermo-off temperature (temperature which compressor stops to operate) is reached during:-
 − Cooling/Heating operation - the compressor stops for 3 minutes (minimum) before resume operation.
 − Soft Dry operation - the compressor stops for 6 minutes...

(For 8.5.3. to 8.5.7. information applies only to Cooling and Soft Dry Operation)
8.5.3. 7 Minutes Time Save Control
 • The compressor will startautomatically if it has stopped for 7 minutes and the intake air temperature falls between the
compressor ON temperature (A) and compressor OFF temperature (B) during the period.
 • This phenomenon is to reduce thebuilt up humidity inside a room.
8.5.4. 60 Seconds Forced Operation
 • Once the air conditioner is turned on, the compressor will not stop within 60...

(For 8.5.8. to 8.5.14. information applies only to Heating Operation)
8.5.7. 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 conditions occur for 30 minutes continuously, anti-dew formation will
activate:
 − Remote Control setting temperature is less than 25°C.
 − Compressor is on.
 − Cooling operation mode.
 − Indoor Fan motor operate at Low fan speed (CLo, Lo- or QLo).
 • This control is...

8.5.9. Compressor Overload Protection Control
Outdoor Fan Control
 • If the temperature of the indoor heat exchanger rises to 51°C, outdoor fan stops. The outdoor fan restarts when the indoor
heat exchanger temperature falls to 49°C.
Compressor high pressure protection
 • If the indoor heat exchanger becomes 65°C ormore, the compressor willstop and restart automatically.
(Time Delay Safety Control- 4 minutes waiting).
 • This is to reduce the pressure, as to reduce the indoor heat exchanger temp....

8.5.12. 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 indoor heat exchanger reaches 30°C as diagram shown.
 • Hot start is completed when indoor heat exchanger rises to 39°C or operation over 4 minutes.
8.5.13. Anti Cold Draft Control
 • This operation is to prevent the Cold Draft during Heating mode operation.
 • The operation will start when compressor OFF (Thermo...

8.5.14. Deicing Control
Deice starts to prevent frosting at outdoor heat exchanger.
 • Normal Deicing
Deice operations detection commences after 30 minutes of Heating operation starts or 60 minutes after previous deice
operation. If the TRS (Thermal Reed Switch) senses the outdoorpiping temperature drops to -3°C (TRS CLOSE) or less for
50 sec. continuously during compressor isin operation, deice will start.
(There is no detection during Outdoor Fan stops.)
 • Overload Deicing
During heating operation, if...

Normal Deicing Time Diagram
Overload Deicing Time Diagram
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CS-A7DKD CU-A7DKD / CS-A9DKD CU-A9DKD / CS-A12D KD CU-A12D KD / 

8.6. Indoor Fan Speed Control
 • Indoor Fan Speed can be set using remote control.
8.6.1. Fan Speed Rotation Chart
Fan Speed (rpm)CS-A7DKDCS-A9DKDCS-A12DKD
SHi122012701310
Hi105011601280
Me9209601120
HLo840840960
CLo780780880
Lo-750750850
SLo700700750
SS Lo300300300
QSHi112011701210
QHi95010601180
QMe8208601020
QHLo770770890
QLo680680780
8.6.2. 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...