Panasonic CS-E24MKDS / CU-E24MKD / CS-E28MKDS / CU-E28MKD Service Manual ▷ View online
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12.1.5. Automatic Operation
• This mode can be set using remote control and the operation is decided by remote control setting temperature, remote control
operation mode, indoor intake air 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.
Every 30 minutes, the indoor and outdoor temperature is judged. Based on remote control setting temperature, the value of T1 will
increase up to 10°C, T2 will decrease by 3°C and T3 will decrease up to 8°C.
The Auto Operation Mode shifting will take place whenever operation mode changed from Cooling/Soft Dry to Heating or vice
versa.
increase up to 10°C, T2 will decrease by 3°C and T3 will decrease up to 8°C.
The Auto Operation Mode shifting will take place whenever operation mode changed from Cooling/Soft Dry to Heating or vice
versa.
12.1.6. Indoor Fan Motor Operation
A. Basic Rotation Speed (rpm)
i. Manual Fan Speed
[Cooling, Dry]
[Cooling, Dry]
• Fan motor’s number of rotation is determined according to remote control setting.
[Heating]
• Fan motor’s number of rotation is determined according to remote control setting.
ii. Auto Fan Speed
[Cooling, Dry]
[Cooling, Dry]
• According to room temperature and setting temperature, indoor fan speed is determined automatically.
• The indoor fan will operate according to pattern below.
• The indoor fan will operate according to pattern below.
Remote Control
O
O
O
O
O
Tab
Hi
Me+
Me
Me-
Lo
Remote Control
O
O
O
O
O
Tab
Shi
Me+
Me
Me-
Lo
38
[Heating]
• According to indoor pipe temperature, automatic heating fan speed is determined as follows.
B. Feedback control
• Immediately after the fan motor started, feedback control is performed once every second.
• During fan motor on, if fan motor feedback 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter
• During fan motor on, if fan motor feedback 2550 rpm or < 50 rpm continue for 10 seconds, then fan motor error counter
increase, fan motor is then stop and restart. If the fan motor counter becomes 7 times, then H19 - fan motor error is detected.
Operation stops and cannot on back.
Operation stops and cannot on back.
12.1.7. Outdoor Fan Motor Operation
Outdoor fan motor is operated with one fan speed only. It starts when compressor starts operation and it stops 30 seconds after
compressor stops operation.
compressor stops operation.
12.2. Airflow Direction
1. There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by vertical vanes).
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger
2. Control of airflow direction can be automatic (angles of direction is determined by operation mode, heat exchanger
temperature and intake air temperature) and manual (angles of direction can be adjusted using remote control).
12.2.1. Vertical Airflow
Operation Mode
Airflow Direction
Vane Angle (
)
1
2
3
4
5
Heating
Auto with Heat Exchanger
A
20
B
45
Temperature
C
32
Manual
20
32
45
57
68
Cooling and e-ion
Auto
20 ~ 45
Manual
20
26
32
37
45
Soft Dry
Auto
20 ~ 45
Manual
20
26
32
37
45
39
1. Automatic vertical airflow direction can be set using remote control; the vane swings up and down within the angles as stated
above. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Figure 1
below. It does not swing during fan motor stop. When the air conditioner is stopped using remote control, the vane will shift to
close position.
below. It does not swing during fan motor stop. When the air conditioner is stopped using remote control, the vane will shift to
close position.
2. Manual vertical airflow direction can be set using remote control; the angles of the vane are as stated above and the positions
of the vane are as Figure 2 below. When the air conditioner is stopped using remote control, the vane will shift to close
position.
position.
12.2.2. Horizontal Airflow
1. Automatic horizontal airflow direction can be set using remote control; the vane swings left and right within the angles as
stated below. It does not swing during fan motor stop. For heating mode operation, the angle of the vane depends on the
indoor heat exchanger temperature as Figure 1 below.
indoor heat exchanger temperature as Figure 1 below.
2. Manual horizontal airflow direction can be set using remote control; the angles of the vane are as stated below and the
positions of the vane are as Figure 2 above.
Operation Mode
Vane Angle (
)
Heating, with heat exchanger temperature
A
68 ~ 112
B
90
Cooling and Soft Dry
68 ~ 112
Pattern
1
2
3
4
5
Airflow Direction
Patterns at Remote
Control
Vane Angle (
Patterns at Remote
Control
Vane Angle (
)
90
68
78
102
112
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12.3. Quiet operation (Cooling Mode/Cooling area of Soft Dry Mode)
A. Purpose
To provide quiet cooling operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “POWERFUL/QUIET” button at remote control is pressed twice.
• When “POWERFUL/QUIET” button at remote control is pressed twice.
POWERFUL/QUIET LED illuminates (low intensity).
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. POWERFUL/QUIET button is pressed again.
b. Stop by OFF/ON switch.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. AUTO COMFORT button is pressed.
e. ECONAVI button is pressed.
e. ECONAVI button is pressed.
f. Mild Dry Cooling button is pressed.
2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
C. Control contents
1. Fan speed is changed from normal setting to quiet setting of respective fan speed.
This is to reduce sound of Hi, Me, Lo for 3dB (some models more than 3dB).
2. Fan speed for quiet operation is reduced from setting fan speed.
12.3.1. Quiet operation (Heating)
A. Purpose
To provide quiet heating operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “POWERFUL/QUIET” button at remote control is pressed.
POWERFUL/QUIET LED illuminates.
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. POWERFUL/QUIET button is pressed again.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. AUTO COMFORT button is pressed.
e. ECONAVI button is pressed.
f. Mild Dry Cooling button is pressed.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. AUTO COMFORT button is pressed.
e. ECONAVI button is pressed.
f. Mild Dry Cooling button is pressed.
2. When quiet operation is stopped, operation is shifted to normal operation with previous setting.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode, expect fan only mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
3. When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.
4. When operation mode is changed, quiet operation is shifted to quiet operation of the new mode, expect fan only mode.
5. During quiet operation, if timer “on” activates, quiet operation maintains.
6. After off, when on back, quiet operation is not memorised.
C. Control contents
a. Fan Speed manual
1. Fan speed is changed from normal setting to quiet setting of respective fan speed.
This is to reduce sound of Hi, Me, Lo for 3dB.
2. Fan speed for quiet operation is reduced from setting fan speed.
b. Fan Speed Auto
1. Indoor FM RPM depends on pipe temp sensor of indoor heat exchanger.
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