CS-XE9EKE, CU-XE9EKE, CS-XE12EKE, CU-XE12EKE - Panasonic Air Conditioner Service Manual (repair manual). Page 31

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31
11 Operation and Function
11.1. Basic Function
Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, auto-
matically adjusts output power for maximum comfort always. In order to achieve the suitable operating mode, the microcom-
puter 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.
11.1.1.
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.
11.2. 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 tempera-
ture and intake air temperature) and manual (angles of direction can be adjusted using remote control).
11.2.1.
Vertical Airflow
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. 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 posi-
tion.
Operation Mode
Airflow Direction
Vane Angle (
q)
1
2
3
4
5
Heating
Auto with Heat Exchanger
A
Upward fix
3
Temperature
B
Downward fix
64
C
Upward fix
3
D
Downward fix
3
Manual
3
17
33
49
63
Cooling, Soft Dry
Auto
8 ~ 36
Manual
8
15
22
30
36
Mode Judgement in Auto
Auto
8
Manual
8
15
22
30
36
32
11.2.2.
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. For heating mode operation, the angle of the vane depends on the indoor heat exchanger temperature as Fig-
ure 1 below.
2. Manual horizontal airflow direction can be set using remote control; the angles of the vane are as stated below and the posi-
tions of the vane are as Figure 2 above. 
11.3.
Quiet operation (Cooling Mode/Cooling area of Dry Mode)
A. Purpose
To provide quiet cooling operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “quiet” button at remote control is pressed.
Quiet LED illuminates.
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. Powerful button is pressed.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. Quiet button is pressed again.
Operation Mode
Vane Angle (
q)
Heating, with heat exchanger temperature
A
65 ~ 115
B
90
Cooling, Soft Dry and Ion
65 ~ 115
Pattern
1
2
3
4
5
Airflow Direction
Pattern at Remote
Control
Vane Angle (
q)
90
65
78
102
115
33
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.
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.
2. Fan speed for quiet operation is -1 step from setting fan speed.
11.3.1.
Quiet operation (Heating)
A. Purpose
To provide quiet heating operation compare to normal operation.
B. Control condition
a. Quiet operation start condition
• When “quiet” button at remote control is pressed.
Quiet LED illuminates.
b. Quiet operation stop condition
1. When one of the following conditions is satisfied, quiet operation stops:
a. Powerful button is pressed.
b. Stop by OFF/ON switch.
c. Timer “off” activates.
d. Quiet button is pressed again.
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, except 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 -1 step from setting fan speed. 
3. Fan Speed Auto
Indoor FM RPM depends on pipe temp sensor of indoor heat exchanger.
11.4.
Powerful Mode Operation
When the powerful mode is selected, the internal setting temperature will shift to achieve the setting temperature quickly.
(a) Cooling Operation
34
(b) Soft Dry Operation
(c) Heating Operation
11.5.
ON Timer Control
ON timer can be set using remote control, the unit with timer set will start operate earlier than the setting time. This is to provide a
comfortable environment when reaching the set ON time.
60 minutes before the set time, indoor (at fan speed of Lo-) and outdoor fan motor start operate for 30 seconds to determine the
indoor intake air temperature and outdoor air temperature in order to judge the operation starting time.
From the above judgment, the decided operation will start operate earlier than the set time as shown below.
11.6.
OFF Timer Control
OFF timer can be set using remote control, the unit with timer set will stop operate at set time.
11.7.
Auto Restart Control
1. When the power supply is cut off during the operation of air conditioner, the compressor will re-operate within three to four
minutes (there are 60 patterns of compressor restart waiting time between 2 minutes 58 seconds and 3 minutes 52 seconds
to be selected randomly) after power supply resumes. 
2. This type of control is not applicable during ON/OFF Timer setting.
11.8.
Remote Control Signal Receiving Sound
• Long beep sound will be heard when:-
- Stopping the air conditioner using ON/OFF switch.
• Short beep sound will be heard for others setting.
35
11.9.
Filter Cleaning Control
• Filter cleaning function helps to:
- Clean the filters automatically on a regular basis.
- Avoid airflow blockage caused by dusty filter.
- Prevent growth of mold inside the unit.
- Improve cooling effect that saves energy consumption.
• The dust trapped on the filters surface is sucked and discharged to outdoor by a ventilation motor.
• By default, filter cleaning will run automatically once the unit is turned off if the air conditioner:
- Operates continuously for at least 2 hours and above, and
- Accumulative operation time is at least 2 hours and above.
• The filter surface is divided into rows. Each cleaning cycle will clean one row at a time. The numbers of rows to be cleaned will be
based on the air conditioner’s accumulative operation time and model purchased. The following table is an example for model
1.5 HP.
• The number of cleaning cycle depends on the fan speed setting as well. The table above is an example when the fan speed set-
ting is HI. The number of cleaning cycle will be lesser if the fan speed setting is lower.
• You can also set the filter cleaning manually. For details, see Timer Filter Cleaning and Manual Filter Cleaning.
11.9.1.
Auto Filter Cleaning
• Filter cleaning will run automatically after the air conditioner operation stops when air conditioner is turned off using remote con-
trol or turned off by the air conditioner timer.
• After the filter cleaning is completed, the air conditioner operation will remain off.
• The filter cleaning indicator light will move to left or right when filter cleaning is in progress.
• Filter cleaning in progress will be cancelled if:
- Certain buttons on the remote control are pressed.
- The air conditioner main unit’s movable front panel is lifted up.
- There is a power failure.
11.9.2.
Force Filter Cleaning
• Once the air conditioner operation time exceeds 24 hours, the unit is forced to run filter cleaning.
• After the filter cleaning is completed, the air conditioner operation will resume automatically.
11.9.3.
Timer Filter Cleaning
• Filter cleaning timer can be set to run at a specified time daily, given that the air conditioner accumulative operation time is at
least 30 minutes and above.
• Filter cleaning timer overrides air-conditioner’s timer in any given setting.
• Once filter cleaning timer starts, air conditioner operation will stop. After the filter cleaning is completed, the air conditioner oper-
ation will resume automatically.
11.9.4.
Manual Filter Cleaning
• Manual filter cleaning can be performed a comprehensive filter cleaning.
• A comprehensive filter cleaning may take less than an hour to complete.
• This operation has the highest priority over other operation modes. After the filter cleaning is completed, the air conditioner oper-
ation will resume automatically.
Accumulative operation time
Number of cleaning cycle
(<: less than)
(1 cycle: < 4 minutes)
< 2 hours
0
2 hours and < 6 hours
2
6 hours and < 9 hours
3
9 hours and < 12 hours
4
12 hours and < 15 hours
5
15 hours and < 18 hours
6
18 hours and < 21 hours
7
21 hours and < 24 hours
8
36
11.10.
Ventilation Control
• To circulate the indoor air.
• The ventilation operation is enable by pressing the VENTILATION Button. (As a default setting, ventilation will be turned on auto-
matically once the air conditioner operation starts).
11.10.1. Simultaneous Operation
• Operates simultaneously with Auto/Cooling/Drying operation.
• Press VENTILATION button at remote control repeatedly to select your desired ventilation setting. Auto/Cooling/Drying opera-
tion remains as normal regardless of ventilation setting.
• When OFF/ON button at remote control is pressed, all of the air conditioner operations are turned off.
11.10.2. Independent Operation
• Ventilation operates independently.
• Ventilation can be turned on when the air conditioner is in non-operation mode.
• Fan speed in this setting remains as AUTO.
• Press OFF/ON button at remote control to turn off the ventilation operation.
37
12 Protection Control
12.1.
Time Delay Safety Control
• Compressor will not start for three minutes after stop of the operation.
12.2.
30 Seconds Forced Operation
• Once compressor starts the operation, it will not stop its operation for 30 seconds. However, it can be stopped with the remote
controller or the Auto button on the indoor unit.
12.3.
Total Running Current Control
1. When the total running current exceeds l1, compressor operation frequency is reduced. If it reaches below l1, the operation
frequency is increased. (But, up to programmed frequency.)
2. If total running current exceeds l2, compressor is stopped immediately.
3. If it happens three (3) times within 20 minutes, operation will be stopped and Timer LED blinks. (“F98” is activating.)
12.4.
IPM (Power transistor) Protection Control (DC Peak detection
Abnormal Current Control
• If inverter load current (DC peak) exceeds a rated value, compressor will be stopped immediately. When the excess occurs
within 30 seconds after operation, it restarts in 1 minute and when after 30 seconds, restarts in 2 minutes.
• If the excess continuously occurs 7 times within 30 minutes after compressor starts, the unit will be stopped and timer LED on
the indoor unit will be blinking. (“F99” is to be confirmed.)
IPM Overheating Prevention Control
• If temperature of IPM exceeds 103
qC, compressor will be stopped. It will restart in 2 minutes. Temperature for restarting: 90qC.
• If the excess occurs 7 times within 30 minutes after compressor starts, the compressor will be stopped and timer LED on the
indoor unit will be blinking. (“F96” is to be confirmed.)
12.5.
Compressor Overheating Prevention Control
1. If discharge pipe temperature exceeds 100
qC, compressor power will be limited.
2. If discharge pipe temperature exceeds 112
qC, compressor will be stopped.
3. If the above excess occurs 4 times per 10 minutes, timer LED will be blinking. (“F97” is to be confirmed.)
12.6.
Outdoor High Pressure Prevention Control (Cooling and Dry operations)
1. If outdoor heat exchanger temperature exceeds 63
qC in cooling or dry operation, compressor will be stopped.
2. Timer LED is not blinking. (“F95” is memorized, then.)
12.7.
Compressor Protection Control (Refrigeration Cycle Abnormality)
In cooling and Dry operations
1. When compressor is operated continuously for 5 minutes in the maximum cooling power: a running current of 0.7 - 1.4A and
“[Indoor intake air temperature] - [Indoor heat exchanger temperature]” < 4
qC, compressor will be stopped.
2. If the above excess occurs twice for 20 minutes, timer LED is to be blinking. (“F91” is to be confirmed.)
In Heating operation
1. When compressor is operated continuously for 5 minutes in the rated heating power: a running current of 0.7 - 1.4A and
“[Indoor heat exchanger temperature] - [Indoor intake air temperature]” < 5
qC, compressor will be stopped.
2. If the above excess occurs twice for 20 minutes, timer LED is to be blinking. (“F91” is to be confirmed.)
Running current
CS-XE9EKE
CS-XE12EKE
Cooling
I1
3.7A
5.8A
I2
25.0A
25.0A
Heating
I1
5.9A
8.2A
I2
25.0A
25.0A
38
12.8.
Four-way Valve Operation Detection Control (Switching Abnormality between Cool-
ing and Heating)
In Cooling operation
1. When indoor heat exchanger temperature exceeds 45
qC in 4 minutes after compressor starts, compressor will be stopped.
2. If the above excess occurs 4 times per 30 minutes, timer LED is to be blinking. (“F11” is to be confirmed.)
In Heating operation
1. When indoor heat exchanger temperature is below 0
qC in 4 minutes after compressor starts, compressor will be stopped.
2. If the above excess occurs 4 times per 30 minutes, timer LED is to be blinking. (“F11” is to be confirmed.)
12.9.
Anti-Freezing Control (Cooling and Dry operations)
Limit of Cooling power
1. When temperature of indoor heat exchanger is below 5
qC, operating frequency will be decreased.
2. When temperature of indoor heat exchanger exceeds 7
qC, operating frequency will be increased. (But, up to programmed fre-
quency.)
3. When temperature of indoor heat exchanger is below 0
qC continuously for 6 minutes, compressor will be stopped.
4. Timer LED is not blinking. (“H99” is memorized, then.)
Limit of Indoor fan speed
• When temperature of indoor heat exchanger is below 6
qC (2qC at Dry) continuously for 6 minutes, indoor fan speed will be
increased by 50 rpm.
12.10.
Outdoor Air Temperature Control
In Cooling and Dry operations
1. When outdoor air temperature is below 25
qC, the maximum power will be limited up to about 80 - 100% of the rated power.
2. When outdoor air temperature is below 18
qC, the maximum power will be limited up to about 50 - 100% of the rated power.
3. When outdoor air temperature is below 11
qC, the maximum power will be limited up to about 26 - 81% of the rated power.
12.11.
Indoor Intake Air Temperature Control (Heating operation)
1. When indoor air temperature is 35
qC or more, the maximum power will be limited up to the rated power.
2. When fan speed is set at “Lo” and intake air temperature is below 21
qC, the maximum power will be limited up to the rated
power.
39
13 Servicing Mode
13.1. Auto OFF/ON Button
This button is used to pump down the air conditioner during servicing or transferring of outdoor unit.
1. It can be used to operate the air conditioner in limited function if remote control is misplaced or malfunction.
• Auto operation will start when Auto OFF/ON Button is pressed and released within 5 seconds.
• Within 5 minutes of each operation, if the Auto OFF/ON Button is pressed again for more than 5 seconds the air conditioner
will switch to another operation after “Beep” sound.
2. The Auto OFF/ON Button may be used together with remote control to set / change the advanced setting of air conditioner
operation.
• Press and hold AUTO OFF/ON Button for more than 5 seconds, the air conditioner always operate force cooling operation.
• Press and hold AUTO OFF/ON Button until 2 Beep sounds are heard, the forced heating operation is at standby condition.
• Press and hold AUTO OFF/ON Button until 3 Beep sounds are heard, the various setting mode is at standby condition.
• Press and hold AUTO OFF/ON Button until 4 Beep sounds are heard, the individual correspondence mode is at standby con-
dition.
• During standby condition, when the indoor unit receives “AC RESET” signal (Beep sound is heard) from remote control, the
corresponding mode will be activated.
40
13.2. Various Setting Mode
13.2.1.
Remote Control Number Switch Mode
• Set remote control number through receiving signal from remote control. (Please refer to Select Remote Control Transmission
Code).
13.2.2.
Current Setting
• Choose the Current Setting by pressing AUTO OFF/ON button.
13.2.3.
Ventilation Control Setting Mode
• Set the ventilation operation and auto filter cleaning operation by pressing Auto OFF/ON Button.
* VENTILATION 1: Enable ventilation operation and auto filter cleaning.
* VENTILATION 2: Disable ventilation operation and auto filter cleaning.
* VENTILATION 3: Ventilation only and no filter cleaning.
• If there is no operation, or receives any remote control signal within 5 minutes, the setting mode quits.

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