Panasonic cu-xe15skua Operation Manual

Order No: PAPAMY1608072AE

O O

123

TIMER

TEM

OPERATION MANUAL

Air Conditioner

Indoor Unit Outdoor Unit

CS-XE15SKUA CU-XE15SKUA

Destination

AIRCONDITIONER

MODE

U.S.A.

Canada

AUTO

ECONAVI

COMFORT

OFF/ON

FF/

MODE

RFP

TEMP

POWERFUL/

AIRSWING

QUIET

FANSPEED

TIMER

SET

123

OFF

CANCEL

CLOCK

SET CHECK RESET

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.

IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer.

PRECAUTION OF LOW TEMPERATURE

In order to avoid frostbite, be assured of no refrigerant leakage during the installation or repairing of refrigerant circuit.

12. Operation Control

12.1 Basic Function

Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating 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.

12.1.1 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.

Remote Control Setting Temperature

60.8F~86F(16C~30C)

Auto Operation Mode Shifting

Indoor Air Temperature Shifting

Outdoor Air Temperature Shifting

Powerful Mode Shifting

Setting Temperature Limit Checking

(Min: 60.8F(16C) ~ 91.4F(33C)

Internal Setting Temperature

12.1.2 Cooling Operation

12.1.2.1 Thermostat control

 Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -2.7°F (-1.5°C) continue for

3 minutes.

 When compressor is OFF (Thermostat OFF) and AUTO FAN is set, the fan will stop periodically.  Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature >

Compressor OFF point.

12.1.3 Soft Dry Operation

12.1.3.1 Thermostat control

 Compressor is OFF when Intake Air Temperature - Internal Setting Temperature < -3.6°F (-2.0°C) continue for

3 minutes.

Compressor OFF point.

12.1.4 Heating Operation

12.1.4.1 Thermostat control

 Compressor is OFF when Intake Air Temperature - Internal Setting Temperature > +3.6°F (+2.0°C) continue for

3 minutes.

 Compressor is ON after waiting for 3 minutes, if the Intake Air Temperature - Internal Setting Temperature <

Compressor OFF point.

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 and indoor intake air temperature.

 During operation mode judgment, indoor fan motor (with speed of Lo-) is running for 30 seconds to detect the

indoor intake air temperature.

 Every 10 minutes, the indoor temperature is judged.  For the 1st judgment

o If indoor intake temperature - remote control setting temperature  3.6°F (2°C), COOL mode is decided. o If -3.6°F (-2°C)  indoor intake temperature - remote control setting temperature < 3.6°F(2°C), DRY mode is

decided.

o If indoor intake temperature - remote control setting temperature < -3.6°F (-2°C), HEAT mode is decided.

-10.8 (-6)

Heat Dr

-9.0

-7.2 (-4)

-5.4 (-3)

(-5)

-3.6 (-2)

-1.8 (-1)0(0)

1.8 (1)

3.6 (2)

5.4 (3)

7.2 (4)

Cool

9.0 (5)

10.8 (6)

Unit: F(C)

 For the 2nd judgment onwards

o If indoor intake temperature - remote control setting temperature  5.4°F (3°C), if previous operate in DRY

mode, then continue in DRY mode. otherwise COOL mode is decided.

o If -3.6°F (-2°C)  indoor intake temperature - remote control setting temperature < 5.4°F (3°C), maintain with

previous mode.

o If indoor intake temperature - remote control setting temperature < -3.6°F (-2°C), HEAT mode is decided.

-10.8 (-6)

-9.0 (-5)

Heat

-7.2 (-4)

-5.4 (-3)

-3.6 (-2)

current mode

-1.8 (-1)0(0)

Maintain

1.8 (1)

3.6 (2)

5.4 (3)

7.2 (4)

9.0 (5)

Cool /Dry

10.8 (6)

Unit: F(C)

12.1.6 Fan Operation

 Fan Operation is used to circulate air in a room.  During operation, indoor fan run continuously but outdoor fan and compressor stop.  Temperature setting is not applicable.

12.2 Indoor Fan Motor Operation

12.2.1 Basic Rotation Speed (rpm)

A. Basic Rotation Speed (rpm)

i. Manual Fan Speed [Cooling, Dry]  Fan motor’s number of rotation is determined according to remote control setting.

Remote control ż ż ż ż ż

Tab Hi Me+ Me Me- Lo

[Heating]  Fan motor’s number of rotation is determined according to remote control setting.

Remote control ż ż ż ż ż

Tab SHi Me+ Me Me- Lo

ii. Auto Fan Speed

[Cooling, Dry]

 According to room temperature and setting temperature, indoor fan speed is determined automatically.  When set temperature is not achieved, the indoor fan will operate according to pattern below.

F Speed

Higher

Medium

ower

abc def gh

[1 pattern : 10 s]

 When set temperature achieved, the indoor fan speed will be fixed. When thermostat off, the fan stop periodically. [Heating]  According to indoor pipe temperature, automatic heating fan speed is determined as follows.

RPM Increased

F(39oC)

102.2

66.2

F(19oC)

RPM Maintain

RPM Reduced

OFF

95oF(35oC)

60.8oF(16oC)

Indoor Pipe Temp.

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 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.

12.3 Outdoor Fan Motor Operation

 It starts when compressor starts operation and it stops 30 seconds after compressor stops operation.

Compressor:

Outdoor Fan:

Fan Speed

30 sec

OFF

 During cooling operation, and outdoor ambient temperature is below 46.4°F (8°C), outdoor fan speed will be

controlled according to outdoor piping temperature as following:

OD Pipe Temp.

Outdoor fan

speed increased

Outdoor fan

speed maintain

Outdoor fan

speed reduce

B -5.4°F (B -3°C)

A -5.4°F (A -3°C)

OD Pipe Temperature

A 78.8°F (26°C)

B 91.4°F (33°C)

 During above condition, when indoor heat exchanger temperature is below 41°F (5°C), the outdoor fan will stop

according to outdoor piping temperature as following:

Outdoor

OD Pipe Temp.

fan ON

Outdoor

fan OFF

86°F (30°C)

12.4 Airflow Direction

 There are two types of airflow, vertical airflow (directed by horizontal vane) and horizontal airflow (directed by

vertical vanes).

 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).

12.4.1 Vertical Airflow

Operation Mode Airflow Direction

A 25 17

B 55 37

C 25 17

Heating

Cooling

Soft Dry

Auto with Heat

Exchanger

Temperature

Summer House 55 37

Manual 20 45 55 65 70 17 27 37 47 56

Auto 45 ~ 70 2 ~ 39

Manual 20 25 50 55 70 2 7 17 27 39

Auto 45 ~ 70 2 ~ 39

Manual 20 25 50 55 70 2 7 17 27 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.

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.

136.4°F (58°C)

122.0°F (50°C)

Upper Vane Angle (°) Lower Vane Angle (°)

1 2 3 4 5 1 2 3 4 5

Closed Position

Reference point

Step 1

Upper vane: 60° Lower vane: 58°

96.8°F (36°C) A

Indoor Heat Exchanger Temperature

Figure 1

86.0°F (30°C)

Step 2

Step 3

Step 4

Figure 2

Step 5

12.4.2 Horizontal Airflow

 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. It does not swing during fan motor stop.

Operation Mode Vane Angle (°)

Heating, with heat exchanger temperature

Cooling and soft dry 65 ~115

A 65 ~115

B 90

0° Top View

109.4°F (43°C)

Indoor Heat Exchanger

Temperature

A: swing

B: fix front

Figure 1 Figure 2

104°F (40°C)

 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.

Pattern 1 2 3 4 5

Airflow Direction Patterns at Remote Control

Vane Angle (°) 90 65 77.5 102.5 115

12.5 Quiet operation (Cooling Mode/Cooling area of Dry Mode)

 Purpose

o To provide quiet cooling operation compare to normal operation.

 Control condition

o Quiet operation start condition

 When “POWERFUL/QUIET” button at remote control is pressed twice.

POWERFUL/QUIET LED illuminates.

o Quiet operation stop condition

 When one of the following conditions is satisfied, quiet operation stops:

 POWERFUL/QUIET button is pressed again.  Stop by OFF/ON switch.  Timer “off” activates.  AUTO COMFORT button is pressed.  ECONAVI button is pressed.

 When quiet operation is stopped, operation is shifted to normal operation with previous setting.  When fan speed is changed, quiet operation is shifted to quiet operation of the new fan speed.  When operation mode is changed, quiet operation is shifted to quiet operation of the new mode.  During quiet operation, if timer “on” activates, quiet operation maintains.  After off, when on back, quiet operation is not memorised.

 Control contents

o Fan speed is changed from normal setting to quiet setting of respective fan speed.

Fan speed for quiet operation is reduced from setting fan speed.

12.6 Quiet Operation (Heating)

 Purpose

o To provide quiet heating operation compare to normal operation.

 Control condition

o Quiet operation start condition

 When “POWERFUL/QUIET” button at remote control is pressed.

POWERFUL/QUIET LED illuminates.

o Quiet operation stop condition

 When one of the following conditions is satisfied, quiet operation stops:

 POWERFUL/QUIET button is pressed again.  Stop by OFF/ON switch.  Timer “off” activates.  AUTO COMFORT button is pressed.  ECONAVI button is pressed.

fan mode only.

 During quiet operation, if timer “on” activates, quiet operation maintains.  After off, when on back, quiet operation is not memorised.

 Control contents

o Fan speed manual

 Fan speed is changed from normal setting to quiet setting of respective fan speed.  Fan speed for quiet operation is reduced from setting fan speed.

o Fan Speed Auto

 Indoor FM RPM depends on pipe temp sensor of indoor heat exchanger.

12.7 Powerful Mode Operation

 When the powerful mode is selected, the internal setting temperature will shift lower up to 3.6°F (2°C) (for

Cooling/Soft Dry) or higher up to 6.3°F (3.5°C) (for Heating) than remote control setting temperature for 20 minutes to achieve the setting temperature quickly.

12.8 Timer Control

 There are 2 sets of ON and OFF timer available to turn the unit ON or OFF at different preset time.  If more than one timer had been set, the upcoming timer will be displayed and will activate in sequence.

12.8.1 ON Timer Control

 ON timer 1 and ON timer 2 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.

12.8.2 OFF Timer Control

OFF timer 1 and OFF timer 2 can be set using remote control, the unit with timer set will stop operate at set time.

Indoorintakeai temperatureoF(oC)

86 (30)

77 (25)

5min

Cooling/Soft Dry

15 min

10 min

86 (30) 95 (35)

Outdoor air temperature

oF(o

Indoorintakeai temperatureoF(oC)

59 (15)

41 (5)

35 min

25 min

30 min

32 (0) 41 (5)

Heating

Outdoor air temperature

oF(o

12.9 Auto Restart Control

 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.

 This type of control is not applicable during ON/OFF Timer setting.  This control can be omitted by open the circuit of JP1 at indoor unit printed circuit board.

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