Panasonic CS-A28BKP5 / CU-A28BKP5 Service Manual ▷ View online
Automatic Fan Speed Mode
Heating Operating Time Diagram
When Automatic Fan Speed is selected at Remote Control during heating operation.
•
Fan speed rotates in the range of Hi
→
SLo according to the heat exchanger temperature.
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Deicing Control
a) Normal Deicing Time Diagram
Deice starts to prevent frosting at outdoor heat exchanger.
•
Normal Deicing
Deice operations detection commences in Heating operation starts or 60 minutes after previous deice operation. If the
outdoor piping temperature drops to -4°C for 50 sec. continuously during compressor is in operation, deice will start.
outdoor piping temperature drops to -4°C for 50 sec. continuously during compressor is in operation, deice will start.
(There is no detection during Outdoor Fan stops.)
•
Overload Deicing
During heating operation, if the outdoor Fan OFF duration (due to overload control) is accumulated up to 60 minutes and
after compressor starts for 1 minute, deicing starts.
after compressor starts for 1 minute, deicing starts.
•
Deicing ends when
(a) 12 minutes after deicing operation starts;
(b) The outdoor piping temperature rises to about 12°C.
•
After deicing operation, compressor stops for 30 seconds and 4-way valve stays at cooling position for 10 seconds.
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Operation
Higher
Standard
Lower
Mode
(+2°C)
(±0°C)
(-2°C)
Cooling
27°C
25°C
23°C
Soft Dry
24°C
22°C
20°C
Heating
23°C
21°C
19°C
b) Overload Deicing Time Diagram
8.4. Automatic Mode Operation
1. When the Automatic Mode Operation is selected, the indoor fan operates at SLo fan speed for 20 seconds to sense intake air
temperature and determine the 1st operation mode.
Standard for Determining Operation Mode 1st Judgement
2. Operation mode will be determine again after 1 hour of operation, if the room temperature reaches to set temperature and
compressor off time is over 7 minutes 30 seconds continuously.
Indoor intake air is less than 16°C, Heating mode will immediate operate. (only in the first time judgement)
The present operation mode will be continued, if the room temperature does not reach to set temperature (Compressor
keeps running) eventhough after 1 hour from automatic operation mode started.
For 2nd judgement onwards, indoor fan will operate for 20 seconds to sense the intake air temperature for determining
operation mode.
operation mode.
Standard for Determining Operation Mode 2nd Judgement onwards
Present
Judgement
Next Mode
Mode
Cooling
Soft Dry
Heating
O
O
Cooling
23°C
Cooling
(Judgement:
Not Applicable
(Judgement:
Heating
23°C & Above)
Below 23°C)
O
O
Soft Dry
20°C
Soft Dry
Not Applicable
(Judgement:
(Judgement:
Heating
20°C & Above)
Below 20°C)
O
O
Heating
Cooling
(Judgement:
Not Applicable
(Judgement:
25°C
Heating
25°C & Above)
Below 25°C)
Automatic Set Temperature Refer 3. as below.
3. Automatic Set Temperature
For each operation, set temperature will automatically set as shown below.
However it can be selected 2°C higher or 2°C lower from standard set temperature by pressing the “Room Temperature Setting
button”.
button”.
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Cooling or Soft Dry Operation
When you press the SLEEP Mode, the following movement will
start to avoid overcooling.
start to avoid overcooling.
•
The fan speed refer to Indoor Fan Motor Control.
•
The setting temperature will be risen by
0.5°C at the start of
operation and by
0.5°C one hour later.
•
The operation will stop after
8 hours.
•
When using together with the Timer, the ON-Timer has
priority.
priority.
Heating Operation
When you press the SLEEP Mode, the following movement will
start to avoid overheating.
start to avoid overheating.
•
The fan speed refer to Indoor Fan Motor Control.
•
The setting temperature will be descented by
2°C at the start
of operation and by
3°C one hour later.
•
The operation will stop after
8 hours.
•
When using together with the Timer, the ON-Timer has
priority.
priority.
8.5. Sleep Mode Auto Operation
8.6. Auto Restart Control
•
If there is a power failure, operation will be automatically restarted when the power is resumed.
It will start with previous operation mode and airflow direction.
(Time Delay Safety Control is valid)
•
Auto Restart Control is not available when Timer or Sleep Mode is set.
•
This control can be omitted by cutting the jumper wire J2. (Refer Circuit Diagram)
8.7. Indoor Fan Speed Control
•
Auto Fan Speed Control
When set to Auto Fan Speed, the fan speed is adjusted between maximum and minimum setting as shown in the table.
•
Manual Fan Speed Control
Basic fan speed adjustment (3 settings, from Lo to Hi) can be carried out by using the Fan Speed selection button.
Fan Speed
High Speed
←→
Low Speed
Manual
O
O
O
Cooling
Auto
O
O
O
O
Sleep
O
Soft Dry
Manual, Auto
O
Sleep
O
Manual
O
O
O
Heating
Auto
O
O
O
O
O
O
Sleep
O
O
O
Hi
Me
Lo
SLo
SSLo
STOP
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O
CS-A28
BKP5
/CU-A28
BKP5
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