Panasonic CS-E18CKE / CU-E18CKE / CS-E21CKE / CU-E21CKE Service Manual ▷ View online
CompHz = Freq. A × Freq. H + Freq. C
Example Calculation:
Model No.: E18CK
Operation Mode: Cooling
When Intake Air Temperature - Internal setting Temperature:
1.5°C
1.5°C
CompHz
=
Freq. A × Freq. H + Freq. C
=
1.53 × 46 + 2.5
=
72 Hz (It cuts down less than a decimal point)
Cooling & Soft Dry
E18CK
E21CK
Freq. A
Freq. C
Freq. A
Freq. C
Low Load (Freq. H
9)
1.2
5.0
1.7
7.0
High Load (Freq. H > 10)
1.53
2.5
2.0
4.0
Heating
E18CK
E21CK
Freq. A
Freq. C
Freq. A
Freq. C
Low Load (Freq. H
11)
1.6
8.0
1.9
7.0
High Load (Freq. H > 12)
2.2
1.0
2.35
1.0
Freq. Range
E18CK
E21CK
Cooling
Fc
72
96
Operation Range
12 ~ 86
12 ~ 102
Heating
Fh
86
92
Operation Range
14 ~ 128
14 ~ 128
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
1.5
1
1
1
2
-1.5
1.0
1
1
1
3
-1.0
0.5
14
8
11
4
-0.5
0.0
20
8
15
5
0.0
-0.5
27
8
22
6
0.5
-1.0
35
11
27
7
1.0
-1.5
43
11
36
8
1.5
-2.0
46
11
39
Fc, Fh
9
2.0
-2.5
46
11
39
Fc, Fh
10
2.5
-3.0
46
11
39
Fc, Fh
11
Nil
-3.5
Nil
Nil
39
Fh
12
Nil
-4.0
Nil
Nil
39
Fh
Operating Frequency Calculation Formula:
Remarks:
When Freq. H is equal to 46 (Cooling), 39 (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 (46), Fh (39).
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.
17
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.
18
Values of T1, T2, and T3 depend on remote control setting temperature, as shown in below table. After the adjustment of T1, T2
and T3 values, the operation mode for that particular environment and remote control setting is judged and performed, based on
the above operation mode chart, every 30 minutes.
and T3 values, the operation mode for that particular environment and remote control setting is judged and performed, based on
the above operation mode chart, every 30 minutes.
Remote Control Setting Temperature (°C)
T1
T2
T3
16 ~ 18
+10
+8
-5
19 ~ 22
+8
+7
-7
23 ~ 26
+7
+6
-7
27 ~ 30
+6
+5
-8
There is a temperature shifting on T1, T2, and T3 if the operation mode judged is changed from Cooling/Soft Dry to Heating or vice
verse.
verse.
Operation Mode change from
Temperature shifts (°C)
Cooling/Soft Dry
→ Heating
-2
Heating
→ Cooling/Soft Dry
+2
Example of operation mode chart adjustment:
From the above table, if remote control setting temperature = 25,
T1 = 25 + 7 = 32; T2 = 25 + 6 = 31; T3 = 25 - 7 = 18
The operation mode chart for this example is as shown in below figure and the operation mode to be performed will depend on
indoor intake air temperature and outdoor air temperature at the time when the judgment is made.
indoor intake air temperature and outdoor air temperature at the time when the judgment is made.
8.1.7. Indoor Fan Motor Operation
A. Basic Rotation Speed (rpm)
• Required rotation speed for fan is set to respond to the remote control setting (10 rpm unit)
[Cooling, Dry, Fan]
Remote Control
—
O
O
O
O
O
—
—
—
Tab (rpm)
SHI
Hi
Me+
Me
Me-
Lo
Lo-
SLo
SSLo
E18CK
1530
1440
1360
1290
1220
1150
850
760
630
E21CK
1610
1520
1420
1330
1240
1150
890
800
630
[Heating]
Remote Control
—
O
O
O
O
O
—
—
—
Tab (rpm)
SSHI
SHi
Me+
Me
Me-
Lo
Lo-
SLo
SSLo
E18CK
1590
1560
1480
1410
1340
1270
850
400
300
E21CK
1640
1610
1520
1440
1350
1270
890
400
300
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B. Indoor Fan Control
i. Indoor fan control operation outline
1. Cooling / Dry
2. Heating
20
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