Panasonic Cse9rkuaw Operating Instructions Manual

							© Panasonic Corporation 2015.
Order No: PAPAMY1501049CE 
Indoor Unit 
CS-E9RKUAW 
CS-E12RKUAW 
CS-E18RKUAW 
CS-E24RKUAW 
Destination
USA
Canada
Please file and use this manual together with the service manual for Model No. CU-2E18NBU and CU-5E36QBU, Order No. 
PHAAM1111120A1 and  PAPAMY1312037CE. 
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WARNING 
This service information is designed for experienced repair technicians only and is not designed for use by the general public. 
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. 
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to 
service or repair the products dealt with in this service information by anyone else could result in serious injury or death. 
PRECAUTION OF LOW TEMPERATURE 
In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.
 
OPERATION MANUAL 
						

							49 
13. Operation Control 
13.1 Basic Function 
Inverter control, which equipped with a microcomputer in determining the most suitable operation mode as time 
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operation 
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. 
13.1.1  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. 
 
 
13.1.2 Cooling Operation 
13.1.2.1 Thermostat control 
š  Compressor is OFF when intake Air Temperature - Internal Setting Temperature < 2.7°F. 
š  Compressor is ON after waiting for 3 minutes, if the Intake Temperature - Internal Setting Temperature > 
Compressor OFF point. 
13.1.3  Soft Dry Operation 
13.1.3.1 Thermostat control 
š  Compressor is OFF when Intake Temperature - Internal Setting Temperature < -3.6°F. 
š  Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature > 
Compressor OFF point. 
13.1.4 Heating Operation 
13.1.4.1 Thermostat control 
š  Compressor is OFF when Intake Temperature - Internal Setting Temperature > 3.6°F. 
š  Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature < 
Compressor OFF point 
 
 
 
 
 
 
 
Remote Control Setting Temperature
60.8°F - 86°F
Setting Temperature Limit Checking
(Min: 60.8°F; Max 91.4°F) Auto Operation Mode Shifting
Indoor Air Temperature Shifting
Outdoor Air Temperature Shifting
Powerful Mode Shifting
Internal Setting Temperature 
						

							50 
13.1.4.2  Automatic Operation (For Single Split Connection Only) 
š  This mode can be set using remote control and the operation is decided by remote control setting temperature, 
remote control operation mode and indoor intake air temperature. 
š  During operation mode judgment, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the 
indoor intake air temperature. 
š  Every 10 minutes, the indoor temperature is judged. 
š  For the 1st judgment 
o  If indoor intake temperature - remote control setting temperature – 3.6°F, COOL mode is decided. 
o If -3.6°F ” indoor intake temperature - remote control setting temperature < 3.6°F, DRY mode is decided. 
o  If indoor intake temperature - remote control setting temperature < -3.6°F , HEAT mode is decided. 
 
 
 
š  For the 2nd judgment onwards 
o  If indoor intake temperature - remote control setting temperature – 5.4°F, if previous operate in DRY mode, 
then continue in DRY mode. otherwise COOL mode is decided. 
o If -3.6°F ” indoor intake temperature - remote control setting temperature < 5.4°F, maintain with previous 
mode. 
o  If indoor intake temperature - remote control setting temperature < -3.6°F, HEAT mode is decided. 
 
 
13.2  Indoor Fan Speed Control 
š  Indoor Fan Speed can be set using remote control. 
13.2.1  Fan Speed Rotation Chart 
 
E9RKUAW E12RKUAW E18RKUAW E24RKUAW 
Mode Fan Tap Application rpm rpm rpm rpm 
COOL 
SHi Pwr Me+ 1210 1350 1480 1500 
Hi Fc, RC 1120 1230 1380 1400 
Me+ RC 1010 1110 1300 1320 
Me RC 910 1000 1220 1240 
Me- RC 810 890 1140 1160 
Lo Fcmin, RC 710 780 1060 1090 
Lo- QuietLo 610 620 970 1000 
SLo Dry 550 560 690 690 
SSLo Auto Cut 540 550 580 580 
 
E9RKUAW E12RKUAW E18RKUAW E24RKUAW 
Mode Fan Tap Application rpm rpm rpm rpm 
HEAT 
SSHi Pwr Me+ 1340 1450 1500 1600 
SHi Fh, RC 1250 1380 1410 1500 
Me+ RC 1140 1290 1330 1430 
Me RC 1040 1210 1260 1360 
Me- RC 930 1120 1190 1290 
Lo Fhmin, RC 830 1040 1120 1220 
Lo- QuietLo 730 940 1030 1110 
SLo Thermo Off, Hot start 570 570 430 430 
SSLo Thermo Off 560 560 330 330 
 
-10.8 -9.0 -7.2 -5.4 -3.6 -1.8 1.8 3.6 5.4 7.2 9.0 10.80
HeatDryCool
-10.8 -9.0 -7.2 -5.4 -3.6 -1.8 1.8 3.6 5.4 7.2 9.0 10.80
Heat
Maintain
current modeCool
/Dry 
						

							51 
13.3  Indoor Fan Motor Operation 
13.3.1  Basic Rotation Speed (rpm) 
š Manual Fan Speed 
[Cooling, Dry] 
o  Fan motor’s number of rotation is determined according to remote control setting. 
 
Remote control 
| 
| 
| 
| 
| 
Tab Hi Me+ Me Me- Lo 
 
[Heating] 
o  Fan motor’s number of rotation is determined according to remote control setting. 
 
Remote control 
| 
| 
| 
| 
| 
Tab Shi Me+ Me Me- Lo 
 
š  Auto Fan Speed 
[Cooling, Dry] 
o  According to room temperature and setting temperature, indoor fan speed is determined automatically. 
o  The indoor fan will operate according to pattern below. 
 
 
 
o  During operation, indoor fan motor may stop due to odor prevention. 
 
[Heating] 
o  According to indoor pipe temperature, automatic heating fan speed is determined as follows. 
 
 
 
š Feedback control 
o  Immediately after the fan motor started, feedback control is performed once every second. 
o  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. 
13.4  Outdoor Fan Motor Operation 
Outdoor fan motor is operated with fan speed number of rotation. It starts when compressor starts operation and it 
stops 30 seconds after compressor stops operation. 
 
 ON     ON 
Compressor     OFF   
 ON Fan Speed   ON Outdoor Fan   ƒ30 sec„OFF  
abc def gh[1 pattern : 10 s]
abHigher
FanSpeed
Medium
Lower
RPM Increased
RPM Maintain
RPM Reduced
OFF
Indoor Pipe Temp.
95oC 102.2
oF
60.8oF 66.2
oF 
						

							52 
13.5  Airflow Direction  
š  There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by 
vertical vanes). 
š  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). 
13.5.1 Vertical Airflow 
13.5.1.1  CU-E9RKUA  CU-E12RKUA 
 
Operation Mode  Airflow Direction Vane angle (°) 1 2 3 4 5 
Heating Auto with Heat Exchanger 
Temperature A 20 B 57 
C 32 
Manual  20 32 45 57 68 
Cooling Auto  20 ~ 45 Manual  20 26 32 37 45 
Soft Dry Auto  20 ~ 45 Manual  20 26 32 37 45 
13.5.1.2  CU-E18RKUA  CU-E24RKUA 
 
Operation Mode  Airflow Direction Vane angle (°) 1 2 3 4 5 
Heating Auto with Heat Exchanger 
Temperature A 20 B 45 
C 32 
Manual  20 32 45 57 68 
Cooling Auto  20 ~ 45 Manual  20 26 32 37 45 
Soft Dry Auto (Anti-Dew Control)  20 ~ 45 Manual (Anti-Dew Control)  20 26 32 37 45 
 
š  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. 
š  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.  
 
 
13.5.2  Horizontal Airflow (CU-E9RKUA  CU-E12RKUA) 
The horizontal airflow direction louvers can be adjusted manually by hand. 
 
 
140°
Close position
0°
122°F
86°F 96.8°F
136.4°FC
B
A
Indoor Heat Exchanger
Temperature1
2
3
4
5Side View
Figure 2Figure 1 
						

							53 
13.5.3  Horizontal Airflow (CU-E18RKUA  CU-E24RKUA) 
š  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 Figure 1 below. 
 
Operation Mode  Vane Angle (°) 
Heating with heat exchanger temperature A  68 ~ 112 B 90 
Cooling and Soft Sry  68 ~ 112 
 
 
 
š  Manual vertical 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 below: 
 
 
13.6  Quiet Operation (Cooling Mode/Cooling Area of Dry Mode)  
š Purpose 
o  To provide quiet cooling operation compare to normal operation. 
 
š Control condition 
o  Quiet operation start condition 
ƒ  When “Quiet” button at remote control is pressed. 
Quiet LED illuminates. 
o  Quiet operation stop condition 
ƒ  When one of the following conditions is satisfied, quiet operation stops: 
š  POWERFUL/QUIET button is pressed. 
š  Stop by OFF/ON button. 
š  OFF Timer activates. 
š  POWERFUL/QUIET button is pressed again. 
ƒ  When quiet operation is stopped, operation is shifted to normal operation with previous setting. 
ƒ  When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed. 
ƒ  When operation mode is changed, quiet operation is shifted to quiet operation of the new mode. 
ƒ  During quiet operation, if ON timer activates, quiet operation maintains. 
ƒ  After off, when on back, quiet operation is not memorised. 
 
š Control contents 
o  Auto fan speed is change from normal setting to quiet setting of respective fan speed. This is to reduce 
sound of Hi, Me, Lo for 3dB. 
o  Manual fan speed for quiet operation is -1 step from setting fan speed. 
 
 
 
 
 
 
 
Indoor Heat Exchanger
Te m p e r a t u r e 109.4°F
104.0°F A: swing
B: fix front0°
To p V i e w
5
4
3
Figure 2 2 1
Figure 1
5 4 3 2 1 n r e t t a P
Airflow Direction
Patterns at Remote
Control
Vane Angle (° ) 90 68 78 102 112 
						

							54 
13.7  Quiet Operation (Heating) 
š Purpose 
o  To provide quiet heating operation compare to normal operation. 
 
š Control condition 
o  Quiet operation start condition 
ƒ  When “POWERFUL/QUIET” button at remote control is pressed. 
Quiet LED illuminates. 
o  Quiet operation stop condition 
ƒ  When one of the following conditions is satisfied, quiet operation stops: 
š  Stop by OFF/ON button. 
š  Timer “off” activates. 
š  POWERFUL/QUIET button is pressed again. 
ƒ  When quiet operation is stopped, operation is shifted to normal operation with previous setting. 
ƒ  When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed. 
ƒ  When operation mode is changed, quiet operation is shifted to quiet operation of the new mode. 
ƒ  During quiet operation, if timer “on” activates, quiet operation maintains. 
ƒ  After off, when on back, quiet operation is not memorised. 
 
š Control contents 
o  Fan speed auto 
ƒ  Indoor FM RPM depends on pipe temperature sensor of indoor heat exchanger. Auto 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. 
o  Fan speed manual 
ƒ  Manual fan speed for quiet operation is -1 step from setting fan speed. 
13.8  Powerful Mode Operation  
š  When the powerful mode is selected, the internal setting temperature will shift lower up to 3.6°F (for Cooling/Soft 
Dry) or higher up to 6.3°F (for Heating) than remote control setting temperature for 20 minutes to achieve the 
setting temperature quickly. 
13.9 Timer Control 
13.9.1 ON Timer Control 
š  ON Timer can be set using remote control, where the unit with timer set will start operation earlier than the setting 
time. This is to provide a comfortable environment when reaching the set ON time. 
š  60 minutes before the set ON time, indoor (at fan speed of Lo-) and outdoor fan motor start operation for 30 
seconds to determine the indoor intake air temperature and outdoor air temperature in order to judge the 
operation starting time.  
š  From the above judgment, the decided operation will start operation earlier than the set time as shown below. 
 
 
13.9.2  OFF Timer Control 
š  OFF Timer can be set using remote control, the unit with timer set will stop at set time. 
 
 
Indoorintakeairtemperature (oF)
Outdoor air
temperature (
oF)
86
86 95
Cooling/Soft Dry(
oF) 10 min15 min
5min 77
Indoorintakeairtemperature (oF)
Outdoor air
temperature (
oF)
59
32 41
Heating(
oF) 30 min25 min
35 min 41 
						

							55 
13.10 Auto Restart Control 
š  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 10 patterns between 2 minutes 58 seconds and 3 minutes 52 seconds to be 
selected randomly) after power supply resumes. 
š  This type of control is not applicable during ON/OFF Timer setting. 
13.11 Indication Panel 
 
LED POWER TIMER QUIET POWERFUL AUTO COMFORT ECONAVI 
Color Green Orange Orange Orange  Green  Green 
Light ON  Operation ON  Timer Setting ON Quiet Mode ON  Powerful Mode ON Auto Comfort ON  Econavi Mode ON 
Light OFF  Operation OFF  Timer Setting OFF Quiet Mode OFF  Powerful Mode OFF Auto Comfort OFF  Econavi Mode OFF 
 
Note: 
š  If POWER LED is blinking, the possible operation of the unit are Hot Start, during Deice operation, operation 
mode judgment, or ON timer sampling. 
š  If Timer LED is blinking, there is an abnormality operation occurs. 
13.12   ECONAVI and AUTO COMFORT Operation 
š  A Pyoelectric infrared sensor is used to detect injection strength variation of infrared at setting area to determine 
the presence or absence of human and its activity level. Human detection area is shown in figure below: 
 
 
 
š  ECONAVI and AUTO COMFORT operation – Human presence/absence detection outlined flow 
Process infrared sensor output signal 
Human detection (movement) every 3 seconds. 

z 
Human detection records 
Records human detection (movement) result for 30 seconds and determine its activity level i.e. Hi/Lo. 

z  
Presence / absence detection 
Compares current and previous human detection result every 30 seconds to determine the presence 
or absence of human. 

z  
Presence / absence determination 
Based on human presence / absence detection, if human presence detection showed within 
30 minutes, it is recognised that human is present. If human absence detection showed continuously 
for more than 30 minutes, it is recognised that no human is present. 
 
š  ECONAVI and AUTO COMFORT Sensor abnormality detection 
1.  Connector pulled out (disconnected), Wire cut Abnormality (Fix Output at Hi) 
a. Abnormal judgment start condition. 
    Start from ECONAVI and AUTO COMFORT Sensor power ON, and end after 30 seconds. 
b. Control content. 
    Judge ECONAVI and AUTO COMFORT Sensor power level every 100ms. 
c. Abnormal Judgment condition. 
    When ECONAVI and AUTO COMFORT Sensor has continues for 25 seconds Hi level. 
 
 
 
 
 
To p V i e w
90°
Angle of detection
Area of detection 7m 2m 
						

							56  2.  Circuit Abnormal (Fix Output Lo) 
a. Abnormal judgment start condition. 
    After ECONAVI and AUTO COMFORT Sensor unit power ON, and after pressed 70 seconds. 
b. Control content. 
    Judge ECONAVI and AUTO COMFORT Sensor power level every 100ms. 
c. Abnormal Judgment condition. 
    When ECONAVI and AUTO COMFORT Sensor has continues at Lo level for 25 seconds. 
 
3. Abnormal treatment 
Any one of the above self-diagnosis result is abnormal 
š  Abnormal counter +1 and ECONAVI and AUTO COMFORT Sensor power supply OFF. 
š  After ECONAVI and AUTO COMFORT Sensor unit power is OFF for 5 seconds, Retry the ECONAVI and 
  AUTO COMFORT operation. 
š  When Abnormal counter reach 4 counts, ECONAVI and AUTO COMFORT sensor abnormality is 
confirmed. 
(Abnormal counter is cleared when sensor power ON and maintain normal for 120 seconds and above or 
Clear Abnormal counter by power reset)  
š  Save ECONAVI and AUTO COMFORT Sensor Abnormality H59 (no Timer LED blinking). 
š  ECONAVI & AUTO COMFORT Sensor operation OFF, but ECONAVI and AUTO COMFORT LED 
maintain ON. 
š  The unit still operate as normal. 
š  Sensor error counter can be cleared only after power supply reset or AC Reset button on the remote 
control is pressed. 
 
š  ECONAVI and AUTO COMFORT Demo Mode 
ƒ  To enable ECO DEMO mode, during unit is OFF (power standby): 
 
 
 
ƒ  To disable ECO Demo MODE: 
š  Transmit ECO Demo signal again. 
 
Control details: 
š  During ECONAVI and AUTO COMFORT Demo mode, operation LED ON and horizontal vane will set to Auto 
Swing. 
š  When Hi activity judge, Fan speed change to Hi Fan and ECONAVI and AUTO COMFORT LED ON. 
š  When Lo activity judge, Fan speed change to Lo Fan and ECONAVI and AUTO COMFORT LED OFF. 
š  No setting temperature adjustment. 
 
š  During ECONAVI and AUTO COMFORT operation, the internal setting temperature and fan speed are adjusted 
in order to provide comfort and energy saving. 
SEPress continously for 5s Remote control normal mode
TE
TE
SE
TE
TE
SE
SE
Transmit ECO demo code
and after 30 seconds return to normal
mode.
Transmit sunlight sensor check code
and after 30 seconds return to normal
mode.
Transmit check code
and after 30 seconds return to normal
mode. 
						

							57  š  ECONAVI Start condition.  
ƒ  Press ECONAVI button. 
 
š  ECONAVI Stop condition.  
ƒ  Press ECONAVI button again. 
ƒ  OFF Timer activates. 
ƒ  Press OFF/ON button to turn off the air conditioner. 
ƒ  Press AUTO OFF/ON button to turn off the air conditioner. 
ƒ  Press POWERFUL/QUIET button. 
 
š  AUTO COMFORT Start condition.  
ƒ  Press AUTO COMFORT button. 
 
š  AUTO COMFORT Stop condition.  
ƒ  Press AUTO COMFORT button again. 
ƒ  OFF Timer activates. 
ƒ  Press OFF/ON button to turn off the air conditioner. 
ƒ  Press AUTO OFF/ON button to turn off the air conditioner. 
ƒ  Press POWERFUL/QUIET button. 
 
š  ECONAVI and AUTO COMFORT operation could ON when any of the following conditions is fulfilled:  
ƒ  During forced cooling or forced heating operation. 
 
š  Power Failure  
ƒ  ECONAVI and AUTO COMFORT operation will be resuming after recovered from power failure.  
 
š  Timer Operation  
ƒ  When unit is turn on by ON Timer and ECONAVI and AUTO COMFORT operation is ON during previous 
operation before OFF, ECONAVI and AUTO COMFORT operation will not be ON automatically. 
ƒ  When unit is turn on by ON Timer and ECONAVI and AUTO COMFORT operation is OFF during 
previous operation before OFF, ECONAVI and AUTO COMFORT operation will not be ON automatically. 
 
š  Other Information  
ƒ  ECONAVI and AUTO COMFORT, Powerful, Quiet and Mild Dry Cooling cannot be operated at the same 
time. 
ƒ  ECONAVI and AUTO COMFORT sensor initialized time is 70 seconds from power supplied to ECONAVI 
and AUTO COMFORT sensor, or 70 seconds from the operation start. 
 
š  Setting Temperature and Fan Speed Shift 
ƒ Mono Sensor 
 
 
 
 
 
 
 
 
 
 
Low activity Normal activity Human
Mode
Set
temperatureHigh activityAbsent ECONA
VI; Detecting human presence and activity, the unit controls room temperature to save energy.
Low activity Normal activity Human
Mode
Set
temperatureHigh activityAbsent
Set
Fan Speed AUTO COMFORT; Detecting human presence and activity, the unit controls room temperature to keep human
comfortable consistently.HEAT
COOL/DRY
HEAT
COOL/DRY
* During low activity, fan speed 1 tap up for first 15 minutes or until set temperature is reached.
** During human absence, maximum fan speed for COOL/DRY mode is medium fan.
+1 tap+1 tap*
+2°F / +1°C
+2°F / +1°C+0.5°F / +0.3°C
-2°F / -1°C
-4°F / -2°C+4°F /
+2°C
-4°F /
-2°C -4°F / -2°C+4°F /
+2°C
-4°F /
-2°C