Panasonic CS-F50DD2E5 Service Manual

ORDER NO. MAC0502040C2

Air Conditioner

CS-F50DD2E5 CU-L50DBE8

CONTENTS

	Page
1 SERVICE INFORMATION	3
1.1. Example of trouble at test operation	3
1.2. Caution of test operation	3
1.3. Caution during automatic address setting	3
1.4. Operation Range	3
2 FEATURES	4
2.1. Variety of excellent features	4
2.2. New low-noise outdoor units	5
2.3. Greatly improved workability increases system renewal
capability	6

Page

2.4. A brand-new control method using the latest in technology

		7
3	SPECIFICATION	9
	3.1. CS-F50DD2E5 CU-L50DBE8	9
4	DIMENSIONS	10
	4.1. CS-F50DD2E5	10
	4.2. CU-L50DBE8	11
5	REFRIGERATION CYCLE	12
6	BLOCK DIAGRAM	13
	6.1. CS-F50DD2E5	13

© 2005 Panasonic HA Air-Conditioning (M) Sdn Bhd (11969-T). All rights reserved. Unauthorized copying and distribution is a violation of law.

CS-F50DD2E5 CU-L50DBE8

6.2. CU-L50DBE8	14	10	INSTALLATION INSTRUCTION	35
7 WIRING DIAGRAM	15		10.1. Pipe Length	35
7.1. CS-F50DD2E5	15		10.2. Indoor unit installation	36
7.2. CU-L50DBE8	16		10.3. Outdoor unit installation	45
8 OPERATION DETAILS	17		10.4. Wired remote controller installation	56
8.1. Wired Remote Control (Optional part)	17	11	INSTALLATION & SERVICING AIR CONDITIONER	63
9 OPERATION CONTROL	24		11.1. Outline	63
9.1. Operation Mode	24		11.2. Tools for installing/servicing refrigerant piping	64
9.2. Compressor Start Control	24		11.3. Refrigerant piping work	68
9.3. Cooling Operation	24		11.4. Installation, transferring, servicing	70
9.4. Heating Mode Operation	27	12	TROUBLE SHOOTING GUIDE	74
9.5. Louver Control	30		12.1. Self-diagnosis	74
9.6. Odour Removing Operation	32	13	REPLACEMENT PARTS	76
9.7. Energy Save Operation	33		13.1. INDOOR UNIT	76
9.8. Outdoor Fan Remaining Heat Removal Control	33		13.2. OUTDOOR UNIT	78
9.9. Crank Case Heater Control	33	14	ELECTRONIC CIRCUIT DIAGRAM	82
9.10. Valve Error	33		14.1. Indoor unit	82
9.11. Pump Down Operation	34		14.2. Outdoor unit	86
9.12. Indoor Air Volume Up Control (DC Fan Motor Type Only)			14.3. Wired remote control	91
	34		14.4. Print pattern	92

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CS-F50DD2E5 CU-L50DBE8

1 SERVICE INFORMATION

Notice of Address setting for NEW Duct / NEW Outdoor Unit.

The new Duct Type / New Outdoor models are possible to have address setting for twin control by automatic when main power supply is switched on.

(Manual address setting is also possible by using Dip switch on Indoor unit P.C. board.) However, this address setting is only possible when made proper wiring connection and also Indoor unit should be original virgin unit.

1.1.Example of trouble at test operation

If found out as following phenomenon at test operation on site, it may have possibility of wrong address setting. Therefore, please ensure of the address setting.

1.LCD display of wired remote control had not illuminate although the main power supply switch is ‘on’.

2.LCD display had indicated as normal illumination when power supply switch is ‘on’, however outdoor unit cannot be operated. (But, it is necessary to take 3 to 5 minutes for outdoor unit to start from the timing of remote control ON/OFF switch is ‘on’.)

3.P.C. board had memorized wrong setting information.

a.If main power supply is switched ‘on’ with the wrong connection.

b.When changing the connection or combination of units due to re-installation etc.

•When changing the system from twin control to normal one to one system.

•When making the replacement of units as master and slave etc.

1.2.Caution of test operation

Do not touch the remote control switch and do not change any wirings for one minute when the main power supply switch is ‘on’. (Because the unit is having automatic address setting during the first one minute.)

1.3.Caution during automatic address setting

When main power supply switch is ‘on’, the P.C. board will automatically memorized the connecting system.

Consequently, when initial power supply is ‘on’, there will not be interchangeability of units even of the same type and same capacity unit. Therefore unable to connect the unit to another system.

1.4.Operation Range

The applicable voltage range for each unit is given in “the following table”. The working voltage among the three phases must be balanced within 3% deviation from each voltage at the compressor terminals. The starting voltage must be higher than 85% of the rated voltage.

1.4.1.	Power Supply
		Model	Unit Main Power		Applicable Voltage
		CU-	Phase, Volts	Hz	Maximum	Minimum
		L34DBE5	1~220	50	242	198
		L43DBE5	1~230	50	253	207
			1~240	50	264	216
		L50DBE8	3N~380	50	418	342
			3N~400	50	440	360
			3N~415	50	457	374

1.4.2. Indoor and Outdoor Temperature

Model 50Hz ... L34DBE5, L43DBE5, L50DBE8

Operating	Hz	Indoor Temp. (D.B./W.B.) (°C)		Outdoor Temp. (D.B./W.B.) (°C)
		Maximum	Minimum	Maximum	Minimum
Cooling	50	32/23	21/15	43/-	-15/-
Heating	50	27/-	16/-	24/18	-20/-

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CS-F50DD2E5 CU-L50DBE8

2 FEATURES

2.1.Variety of excellent features

2.1.1.Compact design, height 36 cm

•The height has been reduced to 36 cm, the equipment can be installed in limited spaces.

2.1.2.Versatile installation

•The indoor unit is designed in order that air will also enter from below, for easier installation under different conditions.

•The equipment has two drain outlets on the right and left side for adoption to the installation conditions in the building.

2.1.3.Easy maintenance

•Equipped with a filter as standard. The filter can be removed in three directions for easier maintenance.

2.1.5.Quiet operation

•The sound level is as low as 45db (A) for 6 HP. The models is ideal for installation in offices, shop and houses where quiet operation is important.

2.1.6.Auto fan mode operation (indoor unit)

•Auto fan mode is added to existing modes Hi, Me and Lo. It automatically adjusts the fan speed according to the indoor temperature.

2.1.7.Dry mode function

•Dry mode can make a comfortable indoor environment during wet season.

2.1.8.Automatic changeover function (heat pump models)

•The unit automatically switches between cooling and heating in accordance with operating load in order to maintain a confortable indoor temperature.

2.1.9.Common design for Indoor unit and Remote Control

•The indoor unit and the wired remote control are design as a common specification between Cooling only and Heat Pump models.

2.1.10. Wired Remote Control

•The new design includes an easily-visible red pilot lamp. The power can be turned on and off at a single touch, without opening the cover.

•A built-in thermistor, allowing indoor temperature detection in accordance with indoor conditions by switching with main unit thermistor.

•Twin non-polar wires make installation work easy (10 m cable supplied as accessories).

2.1.4.Static pressure selection

•The static pressure is selectable; 5mmAq or 7mmAq. The static pressure can be selected according to the condition of the duct.

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2.2.New low-noise outdoor units

[Product features]

2.2.1.Low-noise design improves in surrounding areas

1. The noise-suppressing winglet fan is a result of new research into vane design theory. The unique curved shape suppresses the generation of vortexes, thus reduces air flow noise.

CS-F50DD2E5 CU-L50DBE8

2.The adoption of double-orifice rings reduces air passage resistance.

3.Strengthening of the noise insulation materials in the compressor and the sealing-in of mechanical noise allows vibration noise to be greatly enclosed and suppressed.

4.The heat exchanger has an L-shaped design to allow air to flow more smoothly.

5.Noise is automatically reduced further during night time operation with lower outdoor air temperatures.

2.2.2.Automatic restart function

When the electric power resumes after a power failure, the unit will automatically restarts the operation in the pre-failure mode.

2.2.3.Low ambient cooling operation

Cooling operation is possible at outdoor temperature of -5°C.

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CS-F50DD2E5 CU-L50DBE8

2.3.Greatly improved workability increases system renewal capability

2.3.1.Pipes that are one size larger can also be connected for renewal

•If renewing the system, existing refrigerant pipes can be utilized so that only the indoor units and outdoor units need to be replaced.

•For example, liquid and gas pipes from 10 years ago can be connected to current pipes with the same size for one size larger. Effective utilization of materials reduces working time and trouble. (Adaptor sockets are not supplied.)

2.3.2.Additional refrigerant charging unnecessary for 30 m

•All models do not require any additional charging of refrigerant for 30 m of pipe length. This makes installation much easier.

2.3.3.Drain water dripping-prevention structure

•The base of the outdoor unit is provided with a single drain hole in order to prevent drain water from leaking out of the unit. Body connecting a drain elbow and a discharge pipe, water leakages can be prevented even when the unit is installed against a wall.

2.3.4.Space saving design allows units to be installed side by side continuously

•Servicing after installation can be carried out by removing the front covers.

2.3.5.Easy test operation

•Test operation can be carried out for both indoor and outdoor units.

2.3.6.Long pipe design

• Maximum piping length of 50 m.

2.3.7.Internal pipe connection

•Pipes are connected inside the units (inside the side covers), making the final appearance more attractive.

•Pipes can be diverted outward in any of four directions (forward, right, down, rear).

•Small liquid pipe diameters of 9.52mm, making installation work much easier.

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2.3.8.Centralized draining method

•Even when multiple outdoor units are installed to a wall, the drain outlets can be concentrated into a single drain pipe. This makes installation easier and also improve appearance.

2.4.A brand-new control method using the latest in technology

2.4.1.Power supply wiring is also easier

Power supply wiring and other wiring tasks can be carried out more easily.

•Twin non-polar wires used to connect indoor and outdoor units.

•Adoption of connection error prevention circuits for drives

2.4.4.Group control equipment

2.4.5.Twin operation

•Simultaneous air conditioning of wide spaces and corners is possible. Indoor units of same horsepowers and models can even be used in combination.

•Master unit and slave-units can be set automatically in twin systems. No address setting is necessary.

•Multiple indoor units can be operated simultaneously with a single remote control. Note that individual operation is not possible.

CS-F50DD2E5 CU-L50DBE8

wires and signal wires. If a connection error is made, the relay does not operate and current does not flow to the circuit boards.

2.4.2.Separate indoor/outdoor unit power supplies

The power supply can be connected to (1) just the outdoor units, or (2) to both indoor and outdoor units.

2.4.3.Automatic setting initialization function (Remote control and Indoor unit)

In accordance with the indoor and outdoor units connected and the connection methods, conditions such as the configuration (twin or triple format) and remote-control functions such as cooling only or heat pump model are automatically detected and set instantly.

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CS-F50DD2E5 CU-L50DBE8

3 SPECIFICATION

3.1.CS-F50DD2E5 CU-L50DBE8

	ITEM / MODEL			Indoor Unit	Outdoor Unit
			Main Body	CS-F50DD2E5	CU-L50DBE8
Cooling Capacity			kW	14.0
			BTU/h	47,700
Heating Capacity			kW	16.0
			BTU/h	54,600
Refrigerant Charge-less			m	30
Standard Air Volume for High Speed			m3/min	Cooling; 30, Heating; 38	-
			cfm	Cooling; 1059, Heating; 1342	-
External Static Pressure			Pa	Hi 98	-
			mmAq	Hi 10.0
Outside Dimension (H x W x D)			mm	360 x 1000 x 650	1340 x 900 x 320
			inch	14-3/16 x 39-3/8 x 25-19/32	52-7/8 x 35-7/16 x 12-19/32
Net Weight			kg (lbs)	48 (106)	105 (231)
Piping	Refrigerant	Gas	mm (inch)	O.D Ø 15.88 (5/8) Flared Type
Connection
		Liquid	mm (inch)	O.D Ø 9.53 (3/8) Flared Type
	Drain		mm	Female screw RC1 (PT1)	I.D Ø 20 x 1
Compressor	Type, Number of Set			-	Hermetic - 1 (Rotary), 1
	Starting Method			-	Direct on-line starting
	Motor	Type		-	4-pole single phase brushless motor
		Rated Output	kW	-	3.8
Fan	Type, Number of Set			Sirocco Fan	Propeller fan-1
	Motor	Type		4-pole single phase induction motor	6-pole single phase induction motor
		Rated Output	kW	0.27	0.07 x 2
Air-heat Exchanger	(Row x Stage	x FPI)		Slit-fin type (2 x 10 x 20)	Louvre-fin type (2 x 36 x 19)
Refrigerant Control				Capillary tube	-
Refrigerant Oil (Charged)			cm3	-	FV50S (1200)
Refrigerant (Charged) R410A			kg (oz)	-	3.50 (123)
Running	Control Switch			Wired Remote Control	-
Adjustment	Room Temperature			Thermostat	-
Safety Devices				Internal protector for compressor,	Internal thermostat for fan motor,
				Crankcase heater, High pressure switch, Current transformer
Noise Level			dB (A)	Cooling : Hi 49 Lo 45	Cooling 54, Heating 56
				Heating : Hi 47 Lo 44
			Power level dB	Cooling : Hi 64 Lo 60	Cooling 68, Heating 70
				Heating : Hi 62 Lo 59
Moisture Removal			L/h	9.0
EER			W/W	2.77
COP			W/W	3.30

1.Cooling capacities are based on indoor temperature of 27°C D.B. (80.6°F D.B.), 19.0°C W.B. (66.2°F W.B.) and outdoor air temperature of 35°C D.B. (95°F D.B.), 24°C W.B. (75.2°F W.B.)

2.Heating capacities are based on indoor temperature of 20°C D.B. (68°F D.B.) and outdoor air temperature of 7°C D.B. (44.6°F D.B.), 6°C W.B. (42.8°F W.B.)

ELECTRICAL DATA (50 Hz)

ITEM / MODEL						Condition by JIS-B8615
Volts		V			380	400	415
Phase					3N	3N	3N
Power Consumption		kW	Cool		5.06	5.06	5.06
			Heat		4.85	4.85	4.85
Running Current		A	Cool		8.0	7.7	7.4
			Heat		7.7	7.4	7.2
Starting Current		A			8.0	7.7	7.4
Power Factor		%	Cool		96	95	95
			Heat		96	95	94
*Power Factor means total figure of compressor, indoor fan motor and outdoor fan motor.
Panasonic				Power source		AC, 3N~380V, 400V, 415V 50Hz

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CS-F50DD2E5 CU-L50DBE8

4 DIMENSIONS

4.1.CS-F50DD2E5

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CS-F50DD2E5 CU-L50DBE8

4.2.CU-L50DBE8

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CS-F50DD2E5 CU-L50DBE8

5 REFRIGERATION CYCLE

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6 BLOCK DIAGRAM

6.1.CS-F50DD2E5

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CS-F50DD2E5 CU-L50DBE8

6.2.CU-L50DBE8

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CS-F50DD2E5 CU-L50DBE8

7 WIRING DIAGRAM

7.1.CS-F50DD2E5

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CS-F50DD2E5 CU-L50DBE8

7.2.CU-L50DBE8

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CS-F50DD2E5 CU-L50DBE8

8 OPERATION DETAILS

8.1.Wired Remote Control (Optional part)

8.1.1.Name and function of each part

REMOTE

The OFF/ON button cannot be used.

LOCAL

All wired remote control buttons can be used.

Time/time setting display

Check display

Fan speed display

Operation mode selection display

FILTER RESET display

(Appears after the cumulative running time reaches approximately 2,500 hours of operation.)

OFF/ON button

Used to start and stop the operation.

FAN SPEED button

Used to select the fan speed of high (HI), medium (MED), low (LO) or auto (AUTO).

MODE button

Used to select the operation of AUTO, HEAT, FAN, COOL, or DRY.

TEMP (UP/DOWN) buttons

Used to select the desired temperature.

AIR SWING (AUTO/MANUAL) buttons

Used to determined the air swing condition, either auto or manual.

FILTER RESET button

Press to reset the “FILTER RESET” display after washing the filter.

TEST RUN button*

VENTILATION button*

ECONOMY operation button

Provides Energy saving function

ODOUR WASH button

Provides deodorizing function.

CHECK button

Press this button if the check display is flashing.

TIMER/CLOCK SET buttons

Used to set the timer operation and the current time.

Operation indicator

Lights up when the unit in operation.

Temperature setting display (16°C - 31°C)

Airflow direction setting display

NOTES

•Ensure that the correct button is pressed as simultaneous pressing of the multiple buttons will not make the setting correct.

•The illustration above is for explanatory purposes only. The appearance will be different during actual operation.

•Do not operate the remote control with wet hands. Otherwise, electric shock or malfunction may occur.

•Do not press the remote control buttons with sharp object as this may damage the remote control.

•Buttons marked with * are not needed for normal operation. If one of these buttons is pressed by mistake, press the same button once more to cancel the operation.

•When the power resumed after power failure, the unit will restart automatically with all the previous settings preserved by the memory function. (Auto restart function)

•Buttons marked with are not available for operation. If one of these buttons is pressed function will not be available.

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8.1.2.Remote Control - Display

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CS-F50DD2E5 CU-L50DBE8

8.1.3.Remote Control - Panel

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CS-F50DD2E5 CU-L50DBE8

8.1.4.Setting Current Time

•The current time needs to be set when you turn on the power for the first time or after a long time has elapsed since the power was last turned on.

•The current time becomes the standard time for all the Timer operations.

•Set the current time and day accurately.

•Example : Current Day is Wednesday and Current Time is 8:00.

Note:

•Press “UP button” to increase or “DOWN button” to decrease (interval 1 minute) or hold the button to change the time faster.

•If the “UP or DOWN button” is not pressed for 30 seconds during the day or time setting or if the “SELECT button” is pressed, the setting at that moment is confirmed and setting will end.

8.1.5.How To Select The Timer

• 2 types of Timer mode can be selected on the remote control.

−Daily Timer

−Weekly Timer

•These timers cannot be operated simultaneously.

•Select one of these Timers for your convenience.

How to Change the Display

•Press once to change the display from CLOCK to Timer or vice-versa.

•Press more than 3 seconds to change the display from Daily Timer to Weekly Timer or vice-versa.

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CS-F50DD2E5 CU-L50DBE8

CLOCK Display (To set current Day and Time)

Note:

•The above display is shown if no valid timer setting is made.

•If valid timer setting is made.

−	Timer	and setting will be displayed.
−	If you want to check the current time and day, press “MODE button” once.
	(However, after a few seconds, the display will change back to			and the setting)
			Timer

8.1.6.Daily Timer Setting

• Display

•How to Set Daily Timer

−You can set only “ON” or only “OFF” or “ON” and “OFF” in a day.

1.Change Display

Press “MODE button” to change the display to daily timer.

2.ON-Timer, OFF-Timer and select Time

Press “SELECT button”; ON-Timer setting will be displayed.

Press “UP or DOWN button” to select the desired time, (Example: ON 9:00), then press “SET button” to confirm the selected desired time.

Or press “CANCEL button” if you do not want any setting for ON-Timer.

Then OFF-Timer setting will be displayed.

Press “UP or DOWN button” to select the desired time, (Example: OFF 18:30), then press “SET button” to confirm the selected desired time.

Or press “CANCEL button” if you do not want any setting for OFF-Timer.

Note:

•The setting timer will be activated everyday.

•Timer nearer to the current time will be activated first.

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Final Display of Daily Timer:

8.1.7.Weekly Timer Setting

• Display

•How to Set Weekly Timer

−You can set the Timer for 1 week (Monday to Sunday) with 6 programs per day.

−ON-Timer can be set together with your desired temperature. However, this temperature will be used continuously.

−Cannot set 2 programs with same time setting in a day.

−You also may select Collective - many days with same time setting or Individual

−single/one day setting.

1.Change Display

Press “MODE button” to change the display to weekly timer.

2.Select Day (please refer to next page for example of setting) You may select Collective or Individual day setting.

•Collective day setting.

Press “SELECT button”: display will show day selection setting.

Press “UP or DOWN button” to select the day. Then press “SET button” to delete triangle mark (deselect) or add triangle mark (select).

(Triangle mark on top of each day indicates the day to be selected). Repeat these steps if you want to deselect or select many days.

To confirm the selected days, press the “SELECT button”.

•Individual day setting.

Press “UP or DOWN button” to select the day. Then press “SELECT button”.

3.Select Time (please refer to next page for example of setting) For 1st program setting.

Press “UP or DOWN button” to select ON or OFF. Then press “SET button” to confirm.

Press “UP or DOWN button” again to select the desired time.

(If you want to set them together with your desired temperature, press “TEMP UP/DOWN button” to select the temperature).

Then press “SET button” to confirm.

Or press “CANCEL button” if you do not want to set any time. For 2nd ~ 6th program you may refer to the above step.

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For example , if you want to set:

A - Monday to Friday: Same time, 1st program ON 9:00 & 2nd program OFF 16:00.

B - Only Wednesday: Additional 3rd program OFF 12:30 & 4th program ON 13:30.

C - Only Saturday: 1st program ON 10:00 with 20°C & 2nd program OFF 14:00.

D - Sunday: Holiday. No need to set any Timer.

•To set A (Monday to Friday - Collective day setting) Press “SELECT button”

To select Monday to Friday, deselect Saturday and Sunday by pressing “UP or DOWN button” to Saturday, press “SET button” (triangle mark on top of Saturday will disappear)

Follow the same step to deselect Sunday.

Ensure triangle mark appears on top of Monday ~ Friday.

−To confirm the selected days, press “SELECT button”.

To set the time, please refer to step 3. Select time at page 23.

−1st program - select ON and desired time to 9:00. 2nd program - select OFF and desired time to 16:00. 3rd ~ 6th program - press “CANCEL button”.

•To set B (Wednesday - Individual day setting)

−Press “UP or DOWN button” to select WED (Wednesday). Then press “SELECT button”.

To set the time, please refer to step 3. Select time at page 23.

−1st program - press “SET button” twice (confirm ON and 9:00)

2nd program - also press “SET button” twice. (Confirm OFF and 16:00) 3rd program - select OFF and desired time to 12:30

4th program - select ON and desired time to 13:30 5th ~6th program - press “CANCEL button”

•To set C (Saturday - Individual day setting)

−Follow the same step as above.

To set the time, please refer to step 3. Select time at page 23.

−1st program - select ON, desired time to 10:00 and desired temperature to 20°C. 2nd program - select OFF and desired time to 14:00.

3rd ~ 6th program - press “CANCEL button”.

−Final Display for Weekly timer may show as:

(Display is showing, 9:00 ON - Timer on Wednesday will be activated next because it is nearest the current day/time.)

Note:

•Timer that has setting nearest to current time and day will be activated first.

•To check the setting timer, press “SELECT button”, then “UP or DOWN button” to select day. The display will show each program for the selected day.

•To reset the setting for all, press “SELECT button”, then ensure all day setting with triangle mark. Then press “CANCEL button” for all the programs.

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9 OPERATION CONTROL

Description of basic control functions

9.1.Operation Mode

1.Thermostat control

2.Depend on differences between room temperature and setting temperature, Compressor running frequency will be decided and start operation.

Temperature differences become same as below table, then thermostat is off.

Temperature Differences

				Unit: °C
Indoor type	Cassette	Ceiling	Duct D2	Duct D3
Cool mode	-1.5	-1.5	-2.0	-2.0
Dry mode	-2.5	-2.5	-3.0	-3.0
Heat mode	3.5	2.5	2.5	2.5

3.Select indoor temperature thermostat

When connected to wired remote controller, either indoor unit thermostat or remote controller thermostat is available, using remote control setting.

9.2.Compressor Start Control

•When the compressor start, compressor frequency will be fixed at lower level for certain time, to follow the below table, due to avoid the compressor oil discharge.

•Judging from compressor discharge temperature, decide the start condition to select either cool start control, or warm start control.

		Discharge temp. [°C]			>15°C	15°C
			Start control		Cool start	Warm start
Warm start : set 1 →	*set 5 →		normal control
Cool start : set 1 →	set 2 →		set 3 → set 4 → *set 5 →		normal control

•Note

−Frequency at *set 5 = frequency calculated by normal control

−In case of frequency at set n excess the frequency at set 5 in cool condition, skip from set n to set 4 and transfer to set 5.

9.3.Cooling Operation

9.3.1.Cool indoor fan control

•Fan speed manual

Common control for unit using DC motor / unit using AC motor.

Operation start at hi speed, or medium speed, or low speed set by remote control.

•Fan speed auto

When operation start, or shifting to thermostat ON condition from thermostat OFF condition, odour cut operation (refer odour cut operation page for detail), after thermostat ON condition, indoor fan operate as below control.

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CS-F50DD2E5 CU-L50DBE8

−Unit using DC motor

As follow the below figure, fan speed changing operation (program air). (rpm center B and is different if capacity rank is different)

−Unit using AC motor

When 1st thermostat on condition from operation start, fan speed is hi (same as manual fan speed), after 2nd thermostat on condition, fan speed change to medium speed (same as manual medium fan speed).

9.3.2.Odour cut control

•	When cool or dry mode operation start, select odour cut mode or fan auto mode, by remote control, operation start at odour
	wash mode when compressor start or shift to thermostat on from thermostat off.
•	Odour cut operation is under below condition.
		Operation mode		Cool or dry mode
		Odour wash setting		Setting		No setting
		Fan setting	Auto	Odour cut		Odour cut
			Manual	Odour cut		-

• Odour cut operation is to remove the odour generated at indoor heat exchanger to use the drain water come out from indoor heat exchanger.

Thermo & comp ON/OFF

Thermostat ON & comp ON

Thermostat ON

Thermostat ON & comp ON

Time

40 [Sec]

50 [Sec]

-

20 [Sec]

120 [Sec]

20 [Sec]

40 [Sec]

50 [Sec]

-

Cool

Auto

DC motor

OFF

SSLo

Program air

SSLo

OFF

SSLo

OFF

SSLo

Program air

AC motor

OFF

Lo

Hi

Lo

OFF

Lo

OFF

Lo

Me

Dry

Auto

DC motor

OFF

SSLo

SLo

SSLo

OFF

SSLo

OFF

SSLo

SLo

AC motor

OFF

Lo

Lo

Lo

OFF

Lo

OFF

Lo

Lo

9.3.3.Cool powerful operation

•When cool or dry mode operation start, temperature differences between room temperature and setting temperature is more than 5 K, setting temperature shift to 2 K down.

•(But when temperature after shifting is less than 16°C, setting temperature is 16°C = no change)

•Micro computer judge that required indoor load is bigger than calculation base from temperature differences between room temperature and setting temperature, then increase the compressor frequency compared to normal to cool down indoor side immediately.

•Those kind of operation complete after 30 minutes when cool mode operation start.

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9.3.4.Freezing prevention control

•During cool or dry mode operation, if indoor evaporator temperature is going down, freezing prevention control is operated.

•Detail of Freezing prevention control is as follows;

Indoor evaporator temperature area is divided into 5 zones, which consist of stop zone, down zone, no change zone, up zone, and recovery zone. When indoor evaporator temperature is going into each zone, compressor frequency change by following the below table.

Recovery zone	Release freezing prevention operation
Up zone	Fan motor speed step up
No change zone	Operation no change
Down zone	Reduce the compressor frequency
	(check for 3 min, max 3 times)
Stop zone	If continue for 6 min, compressor stop
	(for 3 min after stop, compressor can be started due to restart delay control)

9.3.5.Dew form prevention control

•During cool or dry operation, if outdoor temperature is less than 30°C, and indoor fan speed is low or auto setting, indoor heat exchanger temperature become lower, dew form prevention control start to prevention dew form at indoor discharge grill.

•Indoor evaporator temperature area is divided into 4 zones, which consist of, down zone, no change zone, up zone, and recovery zone.

•When indoor evaporator temperature is going into each zone, change compressor frequency and louver angle by following the below table.

Recovery zone	Release dew form prevention operation
Up zone	Fix the indoor louver angle
	Cassette type : fix the manual 3rd position
	Ceiling type : fix the manual 2nd position
No change zone	Continue check the indoor heat excahnger temperature
Down zone	Reduce the compressor frequency
	(check for 3 min, max 3 times)

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9.3.6.Drain pump control

•During cooling, dry, or defrost operation, drain pump operate by following the below table.

•When compressor start, drain pump operation start after 10 second of indoor fan starting.

•When operation stop or thermostat is off, drain pump continue operating for 6 minute to prevent the drain water from coming back.

9.3.7.Cooling low temperature protection control

•During cooling, or dry operation, if outdoor temperature is less than -15°C.

−And thermostat on condition continue for 15 min, compressor stop.

−After 3 min waiting (restart delay), if thermostat is on, compressor restart.

9.4.Heating Mode Operation

9.4.1.Heating indoor fan control

Fan speed manual

•Fan speed [Hi] [Me] [Lo] set by remote controller.

•However, when operation start, or during operation, fan speed control is limited to due to prevent a cold draft, for example, when heating operation start.

•(K10 = Indoor heat exchanger temperature, depend on indoor type)

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Fan speed auto

•When operation start, or during operation, fan speed control by detecting indoor heat exchanger as follows:

•(K10 = Indoor heat exchanger temperature, depend on indoor type)

9.4.2.Hot start control

•When heating operation start, hot start control carry out.

•During hot start operation, [PREHEAT] displayed at the wired remote controller.

•For wireless remote controller, [POWER LED] is blinking at the receiver of indoor unit. Indoor fan stop and louver angle fixed to upper side in spite of any setting of remote controller. When indoor heat exchanger temperature increase, or 4 minute past after operation start, hot start control finish and shift to normal fan control.

9.4.3.Heating indoor fan control at thermostat off heating mode operation

•During heating operation, if thermostat is off, indoor fan fixed low speed, Louver angle fixed upper side, even if remote control display shows any angle.

(cassette and ceiling model only)

9.4.4. Heating powerful operation

• When heating mode operation start, temperature differences between setting temperature and room temperature is more than 5 K, setting temperature increase 2 K and operation start.

(however, setting temperature after shifting is more than 31°C, setting temperature fixed 31°C.)

• Due to this control, micro computer judge indoor heat loss is big and increase compressor frequency compare to normal condition, then heat up indoor room quickly.

• This control will be finished after 60 min or thermostat is off.

9.4.5. Defrost control

•During heating operation at outdoor low temperature condition, defrost operation start timely to melt the ice formed on outdoor heat exchanger.

•When heating operation accumulated time is time up, and both outdoor temperature and outdoor unit heat exchanger temperature is less than setting temperature for 5 minute. When defrost temperature is more than setting temperature, defrost operation finish.

•During defrost operation, in spite of any change of remote controller, indoor fan stop and louver angle fixed at upper side. (for louver control : cassette and ceiling model only)

•During defrost operation, [DEFROST] is displayed at wired remote controller (when using wireless controller, POWER LED is blinking in receiver of indoor unit), hot start operate after defrost operation finish.

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9.4.6.Heating high temperature protection

•During heating operation, when outdoor temperature is more than 35°C for 15 minute, compressor stop to protect compressor.

•After 3 minute (re-start delat control) waiting, if thermostat on condition, outdoor unit re-start.

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