Fujitsu ASU9RLQ Service Manual

SPLIT TYPE

ROOM AIR CONDITIONER

WALL MOUNTEDtype

INVERTER

SERVICE INSTRUCTION

Models Indoor unit	Outdoor unit
ASU9RLQ	AOU9RLQ
ASU12RLQ	AOU12RLQ
ASU18CL	AOU18CL
ASU18RL	AOU18RL

R410A

CONTENTS

1. SPECIFICATION

ASU9/12RLQ, AOU9/12RLQ, ASU18C/RL, AOU18C/RL...............................................

01-01

2. DIMENSIONS

ASU9/12RLQ, AOU9/12RLQ..........................................................................................	02-01
ASU18C/RL, AOU18C/RL...............................................................................................	02-02

3. REFRIGERANT SYSTEM DIAGRAM

ASU9/12RLQ, AOU9/12RLQ..........................................................................................	03-01
ASU18C/RL, AOU18C/RL...............................................................................................	03-02

4. CIRCUIT DIAGRAM

ASU9/12RLQ, AOU9/12RLQ...........................................................................................	04-01
ASU18C/RL, AOU18C/RL...............................................................................................	04-02

5. DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION..............................................................................................	05-01
2. HEATING OPERATION..............................................................................................	05-02
3. DRY OPERATION......................................................................................................	05-03
4. AUTO CHANGEOVER OPERATION.........................................................................	05-04
5. INDOOR FAN CONTROL...........................................................................................	05-05
6. OUTDOOR FAN CONTROL.......................................................................................	05-07
7. LOUVER CONTROL...................................................................................................	05-08
8. COMPRESSOR CONTROL........................................................................................	05-09
9. TIMER OPERATION CONTROL................................................................................	05-10
10. ELECTRONIC EXPANSION VALVE CONTROL........................................................	05-12
11. TEST OPERATION CONTROL..................................................................................	05-12
12. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )................................	05-12
13. FOUR-WAY VALVE EXTENSION SELECT...............................................................	05-12
14. AUTO RESTART........................................................................................................	05-12
15. MANUAL AUTO OPERATION ( Indoor unit body operation ).....................................	05-13
16. FORCED COOLING OPERATION............................................................................	05-13
17. COMPRESSOR PREHEATING..................................................................................	05-13
18. COIL DRY OPEARTION CONTROL..........................................................................	05-13
19. DEFROST OPERATION CONTROL..........................................................................	05-14
20. OFF DEFROST OPERATION CONTROL..................................................................	05-16
21. VARIOUS PROTECTIONS.........................................................................................	05-17

6. REFRIGERANT CAUTION -R410A-

1. R410A TOOLS............................................................................................................	06-01
2. PRECAUTION FOR INSTALLATION.........................................................................	06-02
3. PRECAUTION FOR SERVICING...............................................................................	06-04
4. NEW REFRIGERANT R410A.....................................................................................	06-05
5. DEFFERENCE FROM CONVENTIONAL MODEL(R22) AND PRECAUTIONS........	06-08

7. TROUBLE SHOOTING

1. WHEN THE UNIT DOES NOT OPERATE AT ALL....................................................	07-01
2. SELF DIAGNOSIS FUNCTION..................................................................................	07-02
3. TROUBLE SHOOTING METHOD
4. SELF-DIAGNOSIS FUNCTION AND CHECKING POINTS.......................................	07-03
5. SERIAL SIGNAL DIAGNOSIS....................................................................................	07-07
6. IPM PROTECTION.....................................................................................................	07-08
7. TROUBLE SHOOTING OF REFRIGERANT CYCLE.................................................	07-09

8. APPENDING DATA

1. JUMPER SETTING OF INDOOR UNIT AND OUTDOOR UNIT................................	08-01
2. OUTDOOR UNIT PRESSURE VALUE AND TOTAL ELECTRIC
CURRENT CURVE...................................................................................................	08-02
3. THERMISTOR RESISTANCE VALUES.....................................................................	08-06
4. CAPACITY/INPUT DATA...........................................................................................	08-07

9. REPLACEMENT PARTS

1. EXPLODED VIEW......................................................................................................	09-01
2. INVERTER ASSEMBLY SPECIFICATION.................................................................	09-07

10. INSTALLATION MANUAL

R410A

WALL MOUNTED type

INVERTER

1 . SPECIFICATIONS

SPECIFICATIONS

	MODEL NAME					ASU9RLQ	ASU12RLQ	ASU18CL	ASU18RL
						AOU9RLQ	AOU12RLQ	AOU18CL	AOU18RL
			PHASE		Ph	1	1	1	1
POWER SOURCE			FREQUENCY		Hz	60	60	60	60
			VOLTAGE		V	208-230	208-230	208-230	208-230
					kW	2.64	3.51	5.28	5.28
	CAPACITY (230V)					(1.05~3.51)	(1.11~4.26)	(1.62~5.58)	(1.62~5.58)
					Btu /h	9,000	12,000	18,000	18,000
						(3,600~12,000)	(3,800~14,500)	(5,500~19,000)	(5,500~19,000)
	POWER CONSUMPTION (230V)				W	670	960	1,730	1,730
						(200~1,200)	(200~1,500)	(250~2,000)	(250~2,000)
	EER				W /W	3.93	3.66	3.05	3.05
					Btu /(h.W)	13.4	12.5	10.4	10.4
COOLING	SEER				Btu /(h.W)	21.00	21.00	19.00	19.00
	RUNNING CURRENT				A	3.2	4.5	7.7	7.7
PERFORMANCE
	POWER FACTOR				%	90	93	98	98
	MAXIMUM CURRENT				A	6.0	7.0	9.0	9.0
	MOISTURE REMOVAL				L /hr	1.3	1.8	2.8	2.8
					Pt /h	2.7	3.8	5.9	5.9
				HI	dB	39	41	44	44
	OPERATING NOISE		INDOOR UNIT	ME	dB	34	35	38	38
				LO	dB	29	29	32	32
	(SOUND PRESSURE)
				QUIET	dB	20	20	25	25
			OUTDOOR UNIT		dB	47	47	50	50
					kW	3.51	4.68	-	6.30
	CAPACITY					(0.87~5.28)	(0.90~6.18)	-	(1.32~8.52)
					Btu /h	12,000	16,000	-	21,600
						(3,000~18,000)	(3,000~21,000)	-	(4,600~29,000)
	POWER CONSUMPTION				W	830	1,250	-	1,930
						(200~1,800)	(200~2,140)	-	(250~2,930)
	COP				W /W	4.25	3.75	-	3.28
HEATING					Btu /(h.W)	14.5	12.8	-	11.2
	HSPF				Btu /(h.W)	11.00	10.55	-	10.00
PERFORMANCE
	RUNNING CURRENT				A	3.9	5.7	-	8.6
	POWER FACTOR				%	92	95	-	98
	MAXIMUM CURRENT				A	8.5	10.0	-	13.5
				HI	dB	40	41	-	42
	OPERATING NOISE		INDOOR UNIT	ME	dB	35	35	-	37
				LO	dB	28	28	-	32
	(SOUND PRESSURE)
				QUIET	dB	21	21	-	27
			OUTDOOR UNIT		dB	47	48	-	50
	COMPRESSOR		TYPE		-	Rotary	Rotary	Rotary	Rotary
			OUTPUT		W	750	750	1,100	1,100
			INDOOR UNIT		m3 /h	560	595	700	700
	AIR CIRCULATION				cfm	329	374	412	412
	(FAN MODE)		OUTDOOR UNIT		m3 /h	2,060	1,850	2,000	2,000
					cfm	1,211	1,088	1,176	1,176
OTHER	STARTING CURRENT				A	3.9	5.7	7.7	8.6
	MINIMUM CIRCUIT AMPACITY				A	10	12	16	16
INDICATION
	MAXIMUM OVERCURRENT PROTECTION				A	20	20	20	20
	DESIGN PRESSURE		HIGH SIDE		PSI(MPa)	450(3.10)	450(3.10)	450(3.10)	450(3.10)
			LOW SIDE		PSI(MPa)	240(1.65)	240(1.65)	240(1.65)	240(1.65)
		COOLING			°F	14~115	14~115	14~115	14~115
	PERMISSIBLE OUTDOOR				°C	-10~46	-10~46	-10~46	-10~46
	TEMPERATURE		HEATING		°F	5~75	5~75	-	5~75
					°C	-15~24	-15~24	-	-15~24

01-01

SPECIFICATIONS

	MODEL NAME				ASU9RLQ	ASU12RLQ	ASU18CL	ASU18RL
					AOU9RLQ	AOU12RLQ	AOU18CL	AOU18RL
	CONNECTING METHOD			-	Flare	Flare	Flare	Flare
		LIQUID SIDE		mm	6.35	6.35	6.35	6.35
	PIPE SIZE			in.	1/4	1/4	1/4	1/4
		GAS SIDE		mm	9.52	9.52	12.7	12.7
				in.	3/8"	3/8"	1/2"	1/2"
	STANDARD PIPE LENGTH			m	7.5	7.5	7.5	7.5
				ft.	25	25	25	25
	MAXIMUM PIPE LENGTH			m	20	20	20	20
INSTALLATION				ft.	66	66	66	66
	CHARGE LESS PIPE LENGTH			m	15	15	15	15
				ft.	49	49	49	49
	AMOUNT OF ADDITIONAL CHARGE			g /m	20	20	20	20
				oz. /ft.	3 /16	3 /16	3 /16	3 /16
	MAXIMUM HEIGHT DIFFERENCE			m	15	15	15	15
				ft.	49	49	49	49
	NUMBER OF WIRE			-	4	4	4	4
	DRAIN HOSE LENGTH			mm	580	580	580	580
				in.	22-13/16"	22-13/16"	22-13/16"	22-13/16"
		INDOOR UNIT		kg	9.5	9.5	9	9
	NET			lbs.	21	21	20	20
		OUTDOOR UNIT		kg	35	37	40	40
WEIGHT				lbs.	77	82	88	88
		INDOOR UNIT		kg	12	12	12	12
	GROSS			lbs.	26	26	26	26
	(PACKAGING WEIGHT)	OUTDOOR UNIT		kg	39	41	44	44
				lbs.	86	90	97	97
			HEIGHT	mm	283	283	275	275
				in.	11-1/8"	11-1/8"	10-13/16"	10-13/16"
		INDOOR UNIT	WIDTH	mm	790	790	790	790
				in.	31-1/8"	31-1/8"	31-1/8"	31-1/8"
			DEPTH	mm	230	230	215	215
	MAIN UNIT			in.	9-1/16"	9-1/16"	8-7/16"	8-7/16"
	DIMENSIONS		HEIGHT	mm	540	540	578	578
				in.	21-1/4"	21-1/4"	22-3/4"	22-3/4"
		OUTDOOR UNIT	WIDTH	mm	790	790	790	790
				in.	31-1/8"	31-1/8"	31-1/8"	31-1/8"
			DEPTH	mm	290	290	300	300
OTHER				in.	11-7/16"	11-7/16"	11-13/16"	11-13/16"
INDICATION			HEIGHT	mm	316	316	290	290
				in.	12-7/16"	12-7/16"	11-7/16"	11-7/16"
		INDOOR UNIT	WIDTH	mm	835	835	835	835
				in.	32-7/8"	32-7/8"	32-7/8"	32-7/8"
			DEPTH	mm	360	360	345	345
	PACKAGE			in.	14-3/16"	14-3/16"	13-9/16"	13-9/16"
	DIMENSIONS		HEIGHT	mm	625	625	648	648
				in.	24-5/8"	24-5/8"	25-1/2"	25-1/2"
		OUTDOOR UNIT	WIDTH	mm	919	919	910	910
				in.	36-3/16"	36-3/16"	35-13/16"	35-13/16"
			DEPTH	mm	385	385	380	380
				in.	15-3/16"	15-3/16"	14-15/16"	14-15/16"
	KIND OF REFRIGERANT			-	R410A	R410A	R410A	R410A
Refrigerant	AMOUNT OF CHARGING			kg	0.95	1.05	1.15	1.15
				lbs.	2-2/16	2-5/16	2-9/16	2-9/16

01-02

R410A

WALL MOUNTED type

INVERTER

2 . DIMENSIONS

D I M E N S I O N S

Models : ASU9RLQ / AOU9RLQ	(unit : mm)
ASU12RLQ / AOU12RLQ
INDOOR UNIT

	790									230

283

OUTDOOR UNIT
	790		290
17		56
			288

540

356

02-01

D I M E N S I O N S

Models : ASU18CL / AOU18CL	(unit : mm)
ASU18RL / AOU18RL
790	215

275

	508
48	20
347	320

540

125

790	66	300
578
10
02-02

R410A

WALL MOUNTED type

INVERTER

3 . REFRIGERANT SYSTEM DIAGRAM

REFRIGERANT SYSTEM DIAGRAM

Models : ASU9RLQ / AOU9RLQ

ASU12RLQ / AOU12RLQ

Muffler

Compressor

Heat exchanger 3-Way ( INDOOR ) valve

2-Way valve

Muffler

4-Way valve

Strainer

	Expansion valve
Heat exchanger	Strainer
( OUTDOOR )
AOU9RLQ
(2Pass)

AOU12RLQ

(4Pass)

Cooling

Heating

03-01

REFRIGERANT SYSTEM DIAGRAM

Models : ASU18CL / AOU18CL

ASU18RL/ AOU18RL

3-Way valve

Muffler

Compressor	4-Way valve

Sub-accumulator

Heat exchanger ( INDOOR )

	Sub-heat	2-Way
		valve
	exchanger
	( INDOOR )

	Strainer
	Expansion valve
Heat exchanger	Strainer
( OUTDOOR )

Cooling

Heating

03-02

R410A

WALL MOUNTED type

INVERTER

4 . CIRCUIT DIAGRAM

CIRCUIT DIAGRAM

Models : ASU9RLQ / AOU9RLQ

ASU12RLQ AOU12RLQ

INDOOR UNIT

OUTDOOR UNIT

				CONTROL BOARD
												WHITE	1 1		WHITE	1
							1	WHITE					2 2		YELLOW	2
CN201		RED				CN4	2	YELLOWRED		4	3	RED	3 3		RED	3
	1		1 1				3	BLUE		2	1		4	4	BLUE	4
		WHITE					4						5 5			5
DISPLAYBOARD	2		2 2						SWITCH
		WHITE			CN3	CN10	1
	8	WHITE	8	8
	3	WHITE	3	3
	4		4	4			2
	5	WHITE	5	5			3
	6	WHITE	6	6			4
	7	WHITE	7	7			5
	9	WHITE	9	9			1	1	RED		1 1
						CN2	2	2	ORANGE		2 2	M
							3 3		YELLOW		3 3		STEP MOTOR
							4	4	PINK		4 4
		BLUE	1 1				5	5	BLUE		5 5
		YELLOW	2 2				1	BLACK
		WHITE	3 3		CN1	CN6
F. M.		BLACK	4	4			2	BLACK

FAN MOTOR	RED		5	5					PIPE TEMPERATURE THERMISTOR
			6	6
							CN5	1	BLACK
					SW			2	BLACK
									ROOM TEMPERATURE THERMISTOR
		POWER CIRCUIT
GRAY 3 3			CN7			BARISTOR
GRAY	2	2
	1 1
						FUSE
						3.15A
				W1	W2	W3	W4
				WHITE	BLACK	RED	GREEN		YELLOW/
THERMAL FUSE 1					2	3
								G
102
TERMINAL									GREEN

AIR CLEAN UNIT

04-01

CIRCUIT DIAGRAM

Models : ASU18CL / AOU18CL

ASU18RL / AOU18RL

INDOOR UNIT

	G 3 2 1 FUSETHERMAL 102 TERMINAL			GRAY	GRAY
				3 2 1
				3 2 1		CIRCUIT POWER
UNITOUTDOOR TO		W1		CN7
		WHITE
		W2
		BLACK		VARISTOR
		RED W3	FUSE
		15A3.
	GREEN /
	YELLOW
					RTHERMISTO	TEMPERATURE ROOM
	OUTDOOR UNIT

MOTOR FAN									INDICATOR PCB ASSY
				FM																						CN201
											7	6		5		4			3		2		1
		RED		BLUE YELLOW WHITE BLACK							WHITE		WHITE		WHITE		WHITE			WHITE		WHITE		RED
	6		5	4	1 2 3						7	6		5		4			3		2		1
SW	6		5	4	3	2	1				7	6		5		4			3		2		1
				CN1											CN3

CONTROLLER PCB ASSY

CN5	CN6
1 2	1 2
BLACK BLACK	BLACK BLACK
	TEMPERATURE PIPE THERMISTOR

CN2	CN10
1 2 3 4 5	1 2 3 4 5
1 2 3 4 5
RED ORANGE YELLOW PINK BLUE
1 2 3 4 5
1 2 3 4 5
M
MOTOR STEP

REACTOR

YELLOW	YELLOW
2	1		W7	RED
2	1			WHITE
			W8
	WHITE	W10		BLACK
			W9
	RED
		W11

PIPE TEMP. THERMISTOR								1	1	RED
			BLACK	1	1			2	2	BLACK
							CN801	3	3
			BLACK	2	2	CN71		4	4	WHITE
			BROWN	3	3			5	5	YELLOW
			BROWN	4	4			6	6	BLUE
DISCHARGE PIPE TEMP. THERMISTOR
					CONTROLLER PCB ASSY
OUTDOOR TEMP. THERMISTOR
			BLACK	1	1					RED
								1	1
			BLACK	2	2	CN70
				3	3			2	2	BROWN
							CN40	3	3	BLUE
	WHITE							4	4	ORANGE
			RED		W4			5	5	YELLOW
			WHITE					6	6	WHITE
FUSE					W2
5A-250V			BLACK		W1
		BLACK
BLACK	BLACK		FUSE 20A-250V		W3		CN30	1	1	BLACK
			GREEN					2	2
										BLACK
								3	3

			RED
	1	1		R(R)
			WHITE		C M COMPRESSOR
	2	2
			S(S)
	3	3			C(T)
			BLACK

F M FAN MOTOR

E V EXPANSION VALVE

4WV 4-WAY VALVE

TERMINAL 1 2 3 4 5

(L) (N) G

TO INDOOR UNIT POWER SUPPLY

04-02

R410A

WALL MOUNTED type

INVERTER

5 . DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION

1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor.

*If the room temperature is°F(2°C)4 higher than a set temperature, the compressor operation frequency will attain to maximum performance.

*If the room temperature is°F(25.5°C)lower than a set temperature, the compressor will be stopped.

*When the room temperature is between °F(+2°C)+4 to -5°F(-2.5°C)of the setting temperature, the compressor frequency is controlled within the range shown in Table1.

However, the maximum frequency is limited in the range shown in Figure 1 based on the fan speed mode and the outdoor temperature.

( Table 1 : Compressor Frequency Range )

	minimum	maximum	maximum
	frequency	frequency	frequency
ASU9RLQ	18Hz	61Hz	80Hz
ASU12RLQ	18Hz	80Hz	96Hz
ASU18CL	18Hz	70Hz	90Hz
ASU18RL	18Hz	70Hz	90Hz

( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )

Outside air		Outside air			Hi	Me	Lo	Quiet
temperature		temperature	9RLQ	A zone	80Hz	61Hz	51Hz	33Hz
		97°F(36°C)		B zone	80Hz	61Hz	51Hz	33Hz
				C zone	80Hz	61Hz	51Hz	33Hz
93°F(34°C)	A zone			D zone	51Hz	42Hz	36Hz	27Hz
		90°F(32°C)		E zone	51Hz	42Hz	36Hz	27Hz
				F zone	51Hz	42Hz	36Hz	27Hz
	B zone
86°F(30°C)			12RLQ	A zone	96Hz	61Hz	51Hz	33Hz
		70°F(21°C)		B zone	96Hz	61Hz	51Hz	33Hz
	C zone			C zone	96Hz	61Hz	51Hz	33Hz
66°F(19°C)				D zone	57Hz	42Hz	36Hz	27Hz
		54°F(12°C)
				E zone	57Hz	42Hz	36Hz	27Hz
50°F(10°C)	D zone			F zone	57Hz	42Hz	36Hz	27Hz
			18CL	A zone	90Hz	45Hz	42Hz	30Hz
		36°F(2°C)
				B zone	90Hz	45Hz	42Hz	30Hz
32°F(0°C)	E zone			C zone	90Hz	45Hz	42Hz	30Hz
				D zone	58Hz	38Hz	34Hz	24Hz
	F zone			E zone	58Hz	38Hz	34Hz	24Hz
				F zone	58Hz	38Hz	34Hz	24Hz
			18RL	A zone	90Hz	45Hz	42Hz	30Hz
				B zone	90Hz	45Hz	42Hz	30Hz
				C zone	90Hz	45Hz	42Hz	30Hz
				D zone	58Hz	38Hz	34Hz	24Hz
				E zone	58Hz	38Hz	34Hz	24Hz
				F zone	58Hz	38Hz	34Hz	24Hz

When the compressor operates for 30 minutes continuously at over the maximum frequency, the maximum frequency is changed from Maximum Frequency to Maximum Frequency. The room temperature is controlled°F(1°C)2 lower than the setting temperature for 40 minutes after starting the operation.

After 40 minutes, it is controlled based on the normal setting temperature.

05-01

2. HEATING OPERATION

2-1 HEATING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor.

*If the room temperature is lower by°F(3°C)6 than a set temperature, the compressor operation frequency will attain to maximum performance.

*If the room temperature is higher°F(25 .5°C)than a set temperatire, the compressor will be stopped.

*When the room temperature is between °F(+2°C)+4 to -6°F(-3°C)of the setting temperature, the compressor frequency is controlled within the range shown in Table2.

However, the maximum frequency is limited in the range shown in Figure 2 based on the fan speed mode and the outdoor temperature.

( Table 2 : Compressor Frequency Range )

	minimum	maximum
	frequency	frequency
ASU9RLQ	18Hz	130Hz
ASU12RLQ	18Hz	130Hz
ASU18CL	-	-
ASU18RL	18Hz	119Hz

( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )

Outside air

Outside air

Hi

Me

Lo

Quiet

temperature

temperature

9RLQ

A zone

130Hz

96Hz

80Hz

68Hz

66°F(19°C)

B zone

130Hz

96Hz

80Hz

54Hz

C zone

C zone

130Hz

96Hz

80Hz

45Hz

63°F(17°C)

12RLQ

A zone

130Hz

96Hz

80Hz

68Hz

57°F(14°C)

B zone

130Hz

96Hz

80Hz

54Hz

B zone

C zone

130Hz

96Hz

80Hz

45Hz

54°F(12°C)

18CL

A zone

-

-

-

-

B zone

-

-

-

-

A zone

C zone

-

-

-

-

18RL

A zone

119Hz

90Hz

70Hz

58Hz

B zone

119Hz

90Hz

70Hz

58Hz

C zone

119Hz

90Hz

70Hz

58Hz

* The room temperature is controlled°F(2°C)4 higher than the setting temperature for 60 minutes after starting the operation.

After 60 minutes, it is controlled based on the normal setting temperature.

05-02

3. DRY OPERATION

3-1 INDOOR UNIT CONTROL

The compressor rotation frequency shall change according to the temperature, set temperature, and room temperature variation which the room temperature sensor of the indoor unit body has detected as shown in the Table 3. However, after the compressor is driven, the indoor unit shall run at operation frequency of 58Hz, for a minute.

( Table 3 : Compressor frequency )

	Operating
	frequency
ASU9RLQ	33Hz
ASU12RLQ	33Hz
ASU18CL	24Hz
ASU18RL	24Hz

( Fig.3 : Compressor Control based on Room Temperature )

room					room
temperature					temperature
Ts+1°F(0.5°C)		compressor ON					Ts+3°F(1.5°C)
		compressor OFF

( Fig.4 : Indoor Fan Control )

Compressor

ON

OFF

Indoor fan

Dry air flow

S-Lo

OFF
10	30	60	180	60	180	60	10	30	(SEC)

When an IAQ works in 9/12LA models, it operate with S-LO without stopping.

05-03

4. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the AUTO mode by remote cintrol, operation starts in the optimum mode from amoung the HEATING, COOLING, DRY and MONITORING modes. During operation, the optimum mode is automatically swiched in accordance with temperature changes. The temperature can be set between 64°F(18°C)and 88°F(30°C)in 2°F(1°C)steps.

1 .When operation starts, only the indoor and outdoor fans are operated for 1 minute. After 1 minute, the room temperature and outside air temperature are sensed and the operation mode is selected in accordance with the table below.

( Fig.5 : Outside air temperature zone selection )

C zone

90°F(32°C)

B zone

14°F(-10°C)

A zone

( Table.4 Operation mode selection table)

	Outside air temperature	(TO)	B zone	C zone
	Room temperature(TB)	A zone
	TB > TS+4°F(2°C)	Monitoring	Cooling	Cooling
			(automatic dry)	(automatic dry)
	TS+4°F(2°C) TB TS - 4°F(2°C)	Monitoring	Monitoring	Monitoring
	TB<TS- 4°F(2°C)	*Heating	*Heating	Monitoring
			*18CL is Monitoring

2 .When COOING was selected at 1 , the air conditioner operates as follow:

The same operation as COOLING OPERATION of item 1 above is performed.

When the room temperature has remained at (set tempareure -2°F(1°C)) for 8 minutes, operation is automatically switched to DRY and the same operation as DRY OPERATION of item 3 above

is performed.

If the room temperature reaches (set temperature+4°F(2°C) during DRY operation, operation returns to COOLING operation.

3.When HEATING was selected at 1 , the same operation as HEATING OPERATION of item 2 above is performed.

4 When the compressor was stopped for 6 consecutive minutes by the temperature control function after the COOLING or HEATING operation mode was selected at 1 above, operation is switched to MONITORING and the operation mode is selected again.

05-04

5. INDOOR FAN CONTROL

(1).Fan speed

( Table 5 : Indoor Fan Speed )

	ASU9RLQ
Operat ion mode	Air flow mode	Speed (rpm)
Heating	Hi	1390
	Me+	1350
	Me	1200
	Lo	1000
	Quiet	760
	Cool air	760
	prevention
	S-Lo	480
Cooling	Hi	1300
Fan	Me	1120
	Lo	950
	Quiet	700
Dry		700
	ASU18CL
Operation mode	Air flow mode	Speed (rpm)
Heating	Hi	-
	Me+	-
	Me	-
	Lo	-
	Quiet	-
	Cool air	-
	prevention
	S-Lo	480
Cooling	Hi	1480
Fan	Me	1260
	Lo	1040
	Quiet	850
Dry		850

	ASU12RLQ
Operation mode	Air flow mode	Speed (rpm)
Heating	Hi	1440
	Me+	1350
	Me	1200
	Lo	1000
	Quiet	760
	Cool air	760
	prevention
	S-Lo	480
Cooling	Hi	1370
Fan	Me	1150
	Lo	950
	Quiet	700
Dry		700
	ASU18RL
Operation mode	Air flow mode	Speed (rpm)
Heating	Hi	1480
	Me+	1420
	Me	1300
	Lo	1110
	Quiet	950
	Cool air	850
	prevention
	S-Lo	480
Cooling	Hi	1480
Fan	Me	1260
	Lo	1040
	Quiet	850
Dry		850

(2).FAN OPERATION

The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH, while the indoor fan only runs.

When Fan mode is set at (Auto), it operates on (MED) Fan Speed.

05-05

(3).COOLING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Figure 6.

On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [COOL] operation modes QUIET, LOW, MED, HIGH, as shown in Table 5.

+4°F(+2°C)

+2°F(+1°C)

(4).DRY OPERATION

Refer to the table 4.

Durring the dry mode operation, the fan speed setting can not be changed.

(Fig.6)

airflow change - over ( Cooling:AUTO )

When the room temperature rises

HIGH mode	+5°F(+2.5°C)

MED mode

+3°F(+1.5°C)

LOW mode

When the room temperature lowers

(Room temperature) D (Setting temperature)

(5).HEATING OPERATION

Switch the airflow [AUTO], and the

(Fig.7)

indoor fan motor will run according

airflow change - over ( Heating:AUTO)

to a room temperature, as shown in

When the room

Figure 7.

temperature rises

On the other hand, if switched

LOW mode

[HIGH] [QUIET], the indoor motor

-2°F

(-1°C)

-3°F(-1.5°C)

will run at a constant airflow of [HEAT]

operation modes QUIET, LOW, MED,

MED mode

HIGH, as shown in Table 5.

-4°F(-2°C)

-5°F(-2.5°C)

MED + mode

When the room

temperature lowers

(Room temperature) D (Setting temperature)

(6).COOL AIR PREVENTION CONTROL (Heating mode)

The maximum value of the indoor fan speed is set as shown in Figure 8, based on the detected temperature by the indoor heat exchanger sensor on heating mode.

(Fig.8 : Cool Air Prevention Control)

Indoor heat exchanger						Indoor heatxchanger
temperature						temperature
117°F(47°C)				Hi
104°F(40°C)				Me+				104°F(40°C)
99°F(37°C)				Lo				93°F(34°C)
86°F(30°C)			Cool air prevention					90°F(32°C)
								82°F(28°C)

S-Lo

05-06

6. OUTDOOR FAN CONTROL

(1). Fan Speed

( Table 6 : Outdoor fan speed )						(rpm)
		ZONE		Cooling	Dry	Heating
ASU9RLQ		A-D		800/760/470	500
		E		400/280	400/280	760/680/470
		F		200	200
ASU12RLQ		A-D		800/760/470	500
		E		400/280	400/280	760/680/470
		F		250/200	250/200
ASU18CL		A-D		860/820/670/500	500
		E		400/340/280	400/340/280	-
		F		280/250/230	280/250/230
ASU18RL		A-D		860/820/670/500	500
		E		400/340/280	400/340/280	820/750/670/450
		F		280/250/230	280/250/230
Refer to Fig1.

(1). Fan Speed

*It runs at 500(A-D ZONE)/200(E,F ZONE) rpm for 20 seconds after starting up the outdoor fan.

*The outdoor fan speed mentioned avobe depends on the compressor frequency.

(When the compressor frequency increases, the outdoor fan speed also changes to the higher speed. When the compressor frequescy decreases, the outdoor fan speed also changes to the lower speed.)

*Outdoor temperature falls, and if it becomes E and F zone(Refer to Fig1), rotations of fan speed will fall.

*After the defrost control is operated on the heating mode, the fan speed keeps at the higher speed as table 7 without relating to the compressor frequency.

( Table 7 : Outdoor fan speed after the defrost )

	Min
ASU9RLQ	800rpm
ASU12RLQ	900rpm
ASU18CL	-
ASU18RL	950rpm

05-07

7. LOUVER CONTROL

(1). VERTICAL LOUVER CONTROL

(Function Range)

Each time the button is pressed, the air direction range will change as follow:

(Fig 9: Air Direction Range)

(Operation Range)

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

Cooling / Dry mode	Horizontal flow
Heating mode	Downward flow

When the temperature of the air being blown out is low at the start of heating operation or during defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

During use of the Cooling and Dry modes, do not set the Air Flow Direction Louver in the Heating range () for long period of time, since water vapor many condense near the outlet louvers and drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow Direction Louvers are left in the hating range for more than 30minutes, they will automatically

return to position .

During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically becomes , and it cannot be adjusted.

(2). SWING OPERATION

When the swing signal is received from the remote controller, the vertical louver starts to swing.

(Swinging Range)

Cooling mode / Dry mode / Fan mode() Heating mode / Fan mode()

When the indoor fan is either at S-lo or Stop mode, the swinging operation is interrrupted and the louver stops at the memorized position.

05-08

8. COMPRESSOR CONTROL

(1). OPEARTION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as shown in the table 8.

(Table 8 : Compressor Operation Frequency Range)

	Cooling		Heating		Dry
	Min	Max	Min	Max
ASU9RLQ	18Hz	80Hz	18Hz	130Hz	33Hz
ASU12RLQ	18Hz	96Hz	18Hz	130Hz	33Hz
ASU18CL	18Hz	90Hz	-	-	24Hz
ASU18RL	18Hz	90Hz	18Hz	119Hz	24Hz

(2). OPEARTION FREQUENCY CONTROL AT START UP

The compressor frequency soon after the start-up is controlled as shown in the figure 10. (Fig.10 : Compressor Control at Start-up)

Frequency

Frequency

Frequency

Frequency

Frequency

Frequency

Time	Time	Time	Time	Time	Time
(Frequency)
	Frequency	Frequency	Frequency	Frequency	Frequency	Frequency
ASU9RLQ	56Hz	74Hz	87Hz	97Hz	108Hz	119Hz
ASU12RLQ	56Hz	74Hz	87Hz	97Hz	108Hz	119Hz
ASU18CL	40Hz	59Hz	72Hz	80Hz	101Hz	110Hz
ASU18RL	40Hz	59Hz	72Hz	80Hz	101Hz	110Hz
(Time)
	Time	Time	Time	Time	Time	Time
ASU9RLQ	80sec	60sec	60sec	180sec	60sec	60sec
ASU12RLQ	80sec	60sec	60sec	180sec	60sec	60sec
ASU18CL	60sec	40sec	40sec	60sec	150sec	60sec
ASU18RL	60sec	40sec	40sec	60sec	150sec	60sec

05-09