Panasonic Cs W7dkr Cs W9dkr Cs W7dkr Series Repair Manual

8.2. Cooling Operation
 • Cooling operation can be set using remote control.
 • This operation is applied to cool down the room temperature reaches the setting temperature set on the remote control.
 • The remote control setting temperature, which takes the reading of intake air temperature sensor, can be adjusted from 16°C
to 30°C.
 • During cooling operation, the compressor will stop running and restart as shown in below figure.
8.2.1. Cooling Operation Time Diagram
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CS-W7DKR CU-W7DKR / CS-W9DKR...

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 toperform 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 can be increased by 2°C permanently, by open the
circuit of JX1 at indoor electronic controller.
8.5. Operation Control
(For 8.5.1 to 8.5.7 information appliesonly toCooling and Soft Dry Operation)
8.5.1. Restart Control (Time Delay Safety Control)
 • W hen the thermo-off temperature (temperature which compressor stops to operate) is reached during:-
 − Cooling operation - the compressor stops for 3 minutes (minimum) before resume...

8.5.4. Anti-Freezing Control
 • If the temperature of the indoor heat exchan ger falls below 2°C continuously for 4 minutes or more, the compressor turnsoff.
The fan speed setting remains the same.
 • This phenomenon is to protect the indoor heat exchan gerfrom freezing and to prevent higher volume of refrigerant in liquidform
returning to the compressor.
 • Compressor will restart again when the indoor heat exchan ger temperature rises to 10°C (Recovery).
 • Restart control (Time Delay Safety Control)...

(For 8.5.8 to 8.5.16 information appliesonly toHeating Operation)
8.5.8. Restart Control (Time Delay Safety Control)
 • W hen 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 the operation is stopped by the remote control, the compressor will not turn on within 3 minutes from the moment operation
stop, although the unit is turn on again within the period.
 •...

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

8.5.15. Anti ColdDraft Control
 • This operation is to prevent the Cold Draft during Heating mode operation.
 • The operation will start when compressor OFF (Thermo OFF) during Heating operation.
 • For the first 30 sec. from compressor OFF (Thermo OFF), Indoor fan speed will operate accordingly to the Indoor heat
exchan ger temperature as shown below:
 • After 30 sec. from compressor OFF (thermo OFF), Indoor fan will run atSSLo speed only.
 • Anti Cold Draft Control will stop when:
 − Intake temperature...

Normal Deicing Time Diagram
Overload Deicing Time Diagram
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CS-W7DKR CU-W7DKR / CS-W9DKR CU-W9DKR / CS-W12DKR CU- W12DKR 

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-W7DKRCS-W9DKRCS-W12DKR
SHi122013101310
Hi107011601280
Me9409801120
HLo840840960
CLo780780880
Lo-750750850
SLo700700750
SS Lo300300300
QSHi112012101210
QHi97010601180
QMe8408801020
QHLo770770890
QLo680680780
8.6.2. Automatic Fan Speed Control
 • W hen set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table.
 − Fan speed...