Panasonic CS-E24CKE / CU-E24CKE Service Manual ▷ View online
8.1. BASIC FUNCTION
8 Operation Details
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes,
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the
microcomputer maintains the set temperature by measuring the temperature of the environment and performing temperature
shifting. The compressor at outdoor unit is operating following the frequency instructed by the microcomputer at indoor unit that
judging the condition according to internal setting temperature and intake air temperature.
8.1.1. Internal Setting Temperature
Once the operation starts, remote control setting temperature will be taken as base value for temperature shifting processes.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
These shifting processes are depending on the air conditioner settings and the operation environment. The final shifted value
will be used as internal setting temperature and it is updated continuously whenever the electrical power is supplied to the unit.
Table (a): Auto Operation Mode Setting
Mode Shift:
Temperature Shift (°C)
Cooling/Soft Dry
→ Heating
-2.0
Heating
→ Cooling/Soft Dry
+2.0
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CS-E24CKE CU-E24CKE
Table (b): Outdoor Air Temperature Shifting
Mode:
Outdoor Temperature, X (°C):
Temperature Shift (°C)
Manual Operation
Auto Operation
Cooling/Soft Dry
38
X
1.50
2.00
30
X
38
1.25
1.25
23
X
30
1.25
1.25
X
23
1.75
1.75
Heating
21
X
-2.25
-1.50
17
X
21
-1.75
-1.00
13
X
17
-0.75
0.00
9
X
13
0.25
0.25
5
X
9
1.25
1.00
1
X
5
0.75
1.00
-3
X
1
1.50
1.00
X
-3
1.50
1.00
Table (c): Powerful Mode Shifting
Mode:
Period, X (min):
Temperature Shift (°C)
Cooling
X
20
-2.0
X
20
0.0
Soft Dry
X
20
-1.0
X
20
0.0
Heating
X
20
+3.5
X
20
+3.5
Table (d): Fan Speed Shifting
Mode:
Fan Speed:
Temperature Shift (°C)
Cooling
All
-0.25
Soft Dry
All
+0.0
Heating
Lo
+2.0
Me-, Me, Me+, Auto, Hi
+1.5
Table (e): Start-Up Shifting
Mode within 60 Minutes from Start-up:
Temperature Shift (°C)
Cooling/Soft Dry
-1.0
Heating
+2.0
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CS-E24CKE CU-E24CKE
CompHz = Freq. A × Freq. H + Freq. C
Example Calculation:
Model No.: E24CK
Operation Mode: Cooling
When Intake Air Temperature - Internal setting Temperature:
1.5°C
1.5°C
CompHz
=
Freq. A × Freq. H + Freq. C
=
1.8 × 30 + 13.0
=
67 Hz (Decimal point is ignored)
Cooling & Soft Dry
E24CK
Freq. A
Freq. C
Low Load (Freq. H
13)
2.0
10.0
High Load (Freq. H > 13)
1.8
13.0
Heating
E24CK
Freq. A
Freq. C
Low Load (Freq. H
15)
1.5
11.0
High Load (Freq. H > 15)
1.7
8.0
Freq. Range
E24CK
Cooling
Fc
64
Operation Range
14 ~ 74
Heating
Fh
68
Operation Range
14 ~ 100
8.1.2. Compressor Operation Frequency
Intake Air Temperature - Internal Setting Temperature (°C)
Freq. H
Zone
Cooling
Soft Dry
Heating
Cooling
Soft Dry
Heating
Remark
1
-2.0
-3.0
1.0
1
5
3
2
-1.5
-2.5
0.5
11
10
13
3
-1.0
-2.0
0.0
15
12
17
4
-0.5
-1.5
-0.5
18
14
21
5
0.0
-1.0
-1.0
22
16
26
6
0.5
-0.5
-1.5
25
18
32
7
1.0
0.0
-2.0
28
21
35
Fh
8
1.5
0.5
-2.5
30
24
35
Fc, Fh
9
2.0
1.0
-3.0
30
27
35
Fc, Fh
10
2.5
1.5
-3.5
30
30
35
Fc, Fh
11
Nil
Nil
-4.0
Nil
Nil
35
Fh
12
Nil
Nil
-4.5
Nil
Nil
35
Fh
Operating Frequency Calculation Formula:
Remarks:
When Freq. H is equal to 30 (Cooling), 35 (Heating) or above, the Comp. may run at the freq. higher than Fc or Fh up to max.
freq. operation.
freq. operation.
Best Amenity Control
Every 90s (Cooling), 120s (Heating) maintain same zone Freq. H + 1 until Fc, Fh.
8.1.3. Cooling Operation
8.1.3.1. Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -1.5°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point +0.5°C.
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CS-E24CKE CU-E24CKE
8.1.4. Soft Dry Operation
8.1.4.1. Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.5°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > Compressor OFF
point.
8.1.5. Heating Operation
8.1.5.1. Thermostat control
• Compressor is OFF when Intake Air Temperature - Internal Setting > +1.5°C.
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF
• Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < Compressor OFF
point -0.5°C.
8.1.6.
Automatic Operation
This mode can be set using remote control and the operation is decided by remote control setting temperature, indoor intake air
temperature and outdoor air temperature.
temperature and outdoor air temperature.
During operation mode judgment, indoor fan motor (with speed of Lo-) and outdoor fan motor are running for 30 seconds to detect
the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.
the indoor intake and outdoor air temperature. The operation mode is decided based on below chart.
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CS-E24CKE CU-E24CKE
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