Sharp AH-N45DP2 User manual

1
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
INDOOR UNIT
AH-N45DP2
AH-N56DP2
OUTDOOR UNIT
MODELS
SERVICE MANUAL
S3314AHN56DP2
SHARP CORPORATION
In the interests of user-safety (Required by safety regulations in some
countries) the set should be restored to its original condition and only
parts identical to those specified should be used.
SPLIT SYSTEM
ROOM AIR CONDITIONERS
AU-N45DP2
AU-N56DP2
TABLE OF CONTENTS
Page
SPECIFICATIONS ............................................................................................................................................. 2
EXTERNAL DIMENSIONS ...............................................................................................................................3
WIRING DIAGRAMS ......................................................................................................................................... 4
ELECTRICAL PARTS ....................................................................................................................................... 5
MICROCOMPUTER CONTROL SYSTEM .......................................................................................................6
FUNCTIONS ...................................................................................................................................................10
TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT ................................................................................ 16
REFRIGERATION CYCLE .............................................................................................................................. 20
PERFORMANCE CURVES ............................................................................................................................21
REFRIGERANT PIPE INSTALLATION WORKS .............................................................................................21
DISASSEMBLING PROCEDURE ...................................................................................................................22
REPLACEMENT PARTS LIST ........................................................................................................................31

2
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
SPECIFICATIONS
ITEMS INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT
AH-N45DP2 AU-N45DP2 AH-N56DP2 AU-N56DP2
Cooling capacity kW 5.0 6.3
Moisture removal Liters/h 1.9 2.5
Electrical data
Phase – Single
Rated frequency Hz 60
Rated voltage V 220
Rated current Cool A 8.5 10.7
Rated input Cool kW 1.82 2.29
Power factor Cool % 97 97
Compressor Type Hermetically sealed rotary type
Model PH28NNBT PH33NPBT
Oil charge 670cc (DIAMOND MS 32(N-1)) 900cc (DIAMOND MS 32(N-1))
Refrigerant system Evaporator Louver fin and Grooved tube type
Condenser Corrugate fin and Grooved tube type
Control Capillary tube
Refrigerant volume 1300g 1570g
Capillary tube size Outer dia. mm – 3.2 – 3.5
Inner dia. mm – 2.0 – 2.2
Length mm – 400 – 800
Q'ty – 1 – 1
Noise level High dB(A) 40 52 44 54
(at cooling) Med. dB(A) 36 – 39 –
Low dB(A) 34 – 37 –
Fan system
Drive Direct drive
Air flow quantity High m3/min. 15.3 48 18.1 50
(at cooling) Med. m3/min. 13.4 – 15.0 –
Low m3/min. 11.3 – 13.7 –
Fan Cross flow fan Propeller fan Cross flow fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 1/2", 1/4" 5/8", 1/4"
Drain piping mm O.D ø 20
Others
Safety device Compressor: Overload protector(Internal) Compressor: Overload protector(Internal)
Fan motors: Thermal protector (Internal)
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 1040 890 1040 890
Height mm 325 645 325 645
Depth mm 220 327 220 327
Net weight kg 16 51 16 60
Note: The condition of star ( ) marked item are ‘CNS 14464 B7291 : T1’.

3
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
570
645
202
122
320 342
890 29037
30
172 25
62 46.3
10.5
ø4.5
EXTERNAL DIMENSIONS
Figure E-1. INDOOR UNIT
Figure E-2. OUTDOOR UNIT
220
1600
Power supply cord
[Length unit : mm]
325
1040
Remote controller
58
18.5
22
140
TEMP.
INVERTER AIR CONDITIONER
TEMP.
MODE
FAN
TIMER

4
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
WIRING DIAGRAMS
Figure W-1. Wiring Diagram for AH-N45DP2
Figure W-2. Wiring Diagram for AU-N45DP2
室内機 室外機
黒
藍
端子板
端子板 機
組
間
配
線
L
電源
單相
端子板
茶
藍
緑-黄
風扇馬達
電容器
回轉數
檢出信号
風扇馬達
紅黒藍
導風板
馬達
室温用
恒温器
熱交用
恒温器
控
制
基
板
受信基板
指示
基板1
指示基板2
指示基板3
電源變厭器
保險絲
内部温度控制器
内部
温度
控制器
In Out
2.5或3A
400或430V
内部清洗按鈕2
内部清洗按鈕1
離子簇
産生器
注意！
高厭電
蒸發器
CB806
L電源
單相
機組間配線
端子板
緑-黄
紅
黒
内部温度控制器
風扇馬達
黒
藍
藍
風扇馬達電容器
藍
紅白
運轉電容器
内部過載継電器
厭縮機
370
或
400V
35μF
控制接地

5
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Figure W-3. Wiring Diagram for AH-N56DP2
Figure W-4. Wiring Diagram for AU-N56DP2
室内機 室外機
端子板 端子板
機
組
間
配
線
茶
L
電源
單相
端子板
緑-黄
藍
藍
紅
茶
保險絲
控
制
基
板
風扇馬達
電容器
藍
黒
紅
回轉數
檢出信号
内部
温度
控制器
風扇馬達
導風板
馬達
室温用
恒温器
熱交用
恒温器 内部温度控制器
電源變厭器
指示
基板1
受信基板
指示基板3
指示基板2
2.5或3A
250V
400或430V
内部清洗按鈕1
内部清洗按鈕2
離子簇
産生器
注意！
高厭電
蒸發器
L電源
單相
機組間配線
端子板
黄
茶
藍
緑-黄 内部温度控制器
風扇馬達
黒藍
藍
風扇馬達電容器
藍運轉電容器
白
紅
藍
紅
黒
内部過載継電器
厭縮機
継電器
CB807
370
或
400V
35μF
控制接地

6
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Part Part Name Items Specifications
No. AH-N45DP2 AH-N56DP2
1Terminal Board Rating 300V 25A
2Fan motor Rating 400V or 430V 2µF
Capacitor
3Relay Rating RY1 AC250V 20A RY4 AC250V 5A
Coil Volt.; 12V Coil Volt.; 12V
4Printed Wiring Material Paper Base Phenolic Resin (UL 94V-0)
Board
5Transformer Rating Pri 220 - 240VAC Sec. 16.8V DC 0.29A
6Fan motor Rating 220 - 230VAC 60Hz 41W 4-Pole
Type MLB038
Thermal Protector Cut off 135±10˚C
(Internal)
7Power Supply Rating 20A 250V 12AWG
Cord Type SJT12AWGSJT12 (12AWGX3)
8Louver Motor Rating DC12V 250
Type MP35EA
Part Part Name Items Specifications
No. AU-N45DP2 AU-N56DP2
1Terminal Board Rating 300V 25A
2Fan motor Rating 450V 3µF 450V 3µF
Capacitor
3Running Rating 370V or 400V 35µF 370V or 400V 35µF
Capacitor
4Compessor Rating AC208 - 230V 60Hz 1250W AC208 - 230V 60Hz 1600W
Type PH28NNBT PH33NPBT
5 Fan motor Rating 220VAC 60Hz 63W 6-Pole 220VAC 60Hz 86W 6-Pole
Type MLB027 MLB028
Thermal protector Cut off 135˚C±5˚C
(Internal)
6Relay Rating – AC250V 30A
Coil volt: 200 -240V
ELECTRICAL PARTS

7
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
MICROCOMPUTER CONTROL SYSTEM
Figure L-1. Electronic Control Circuit Diagram for AH-N45DP2
MODE
13K
R37
L2
NC NC
56
L 1
9.1K
R45
1/2W
10K
D14
25V
47
µ
C29
+
NF1
6.8K 6.8K
R41
100
L1
SSR1
C31 1W
275V
0.033
µ
Q8 Q7
Q6 Q5
JP21
3 1 3 1
NR1
CN9
THERMOSTAT
INTERNAL
CN8 CN7
CN6 CN5
CN3
CN2
CN1
1
23
1
CLUSTER
R35
3.3K
R40 R39 10K
CLEANING SWITCH 1
SWITCH 2 CLEANING
31
D8D9
3
2
12
3 32
2
0.01
µ
C22
16V
2
0.01µ
C10
16V
22K
R6 20K
Q2
1
R5
22K R4
R27
2
1/2W
9
470
R30 SSR2
3
12V
5V
10
9
25V
C24
SW101
2 11
2
8
IC4
10K
R29
R28 1.8K
BZ1
RY1
SSR1
1/2W 470
IC5
8
9
Q1
16V 220µ
10K(F)
+
D6
25V
0.1µ
1 2 4 5 3
MOTOR LOUVER
3 2 1 5 4
1 2 3
HOLE
IC
FAN
MOTOR
2
3
JP3 JP2 JP1
NC
MB89537A
1
IC6
3
10K
13K 13K
25V
0.1
µ
1 µ
50V
IC1
(PATTERN SIDE)
400V
0.01µ
16V
JP5 JP4
1K
0.01
µ
OSC1
FRONT
P21 P22 P23 P24 P25 P26 P27 X1 X0
MOD1 MOD0
RST
32 31 30 29 28 27 26 25 24 23 22 21 20
Vcc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
P45
P46
P47
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AVR
P60
P61
P62
P63
P64
P31 P32 P33 P34 P35 P36 P37 P40 P41 P42 P43 P44
52 53 54 55 56 57 58 59 60 61 62 63 64
P30
NC
P00
P01
P02
P03
P04
P05
P06
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
49
50
51
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
AVcc
AVss
Vss
50V 1000p
+
680
10K 10K
10
µ
16V16V
10
µ
10k
(F) 10K
(F)
4 3 2 1TH2
PIPE TEMP 15kΩ(25˚C). TH1 ROOM TEMP 10kΩ(25˚C).
FAN
MOTOR
2µ
1 3 5
2.7K(F)
D7
+
35V
1000µ
50V
0.1µ
7812
IC2
+
25V 47µ
7805
0.1µ
IC3
25V 10V
100µ
+
C7
D1?4
GND
22.6K(F)
3.3K
45
IC8
1 2 3
8 7 6
0.1µ25V
16V 0.01µ
TR1
C1
C2
C3
C4 C5
C6 C8
C9
C11
C13 C14 C15 C17
C18 C19
C20
C21
C23
C25
R7 R8
R9
R10
R13 R14
R15
R16
R18 R19 R20 R21 R22 R23
R24 R25
R26
R32
R34
10K
16V 16V 16V
0.01µ 0.01µ 0.01µ
6.8K
R12
47K
R11
10MHz
JP10
JP11
JP12
JP13
JP18
10K
10K
0.01µ
16V
0.01 µ
16V
R17
3.3K
13K
C27
C12
SW1 : AUX.(TEST RUN)
C16
25V
0.1
µ
1
R31R33
+
+
C26
3 2 1 1
BCN1
2 3 4 5 6 7 8
R37
6 7 1 3 5
1K(F)
1
0.1µ
D12
3
R108
10
32
(TIMER)
LED102 LED101
(OPERATION)
1
12
BL
GR LED107
(CLUSTER)
134256
9
R107
(FAN L) (FAN M) (FAN H)
(FAN AUTO)
LED106 LED105 LED104 LED103
3K
2.7K
R102 R101
1/2W 1/2W
C102
C101
0.1µ
25V
33µ
10V
+
IC101
BCN101
R103 R104 R105 R106
620 620
1 2 3 1 8 7 6 5 4 3 2
620 620
1/2W 1/2W
56
CN10
CN103
BCN102
CN102
CN101
275V
275V
0.1
µ
0.1 µ
275V C28
86
SSR2
2W 2W
R1 R2
NC
NC
NC
NC
JP9
JP8
JP7
JP19
DEIC E 1
DEIC E 2
DRY FAN
PIPE 1
PIPE 2
NONENONENONENONE
JP7 JP8 JP9 JP10 JP11 JP12 JP13
TEST
NONE
JP6
NONE 15K 15K 15K
JP18 JP19
LOUVOUT
FAN
CLUS TER ER
R19 R21 R23
FAN2FAN1
HEAT COOL
MODE
R38
R38
ON PWR
LESS WIRE
AT SWE-
KEEP HOT
DEF. SYMBOL
I
JP2 JP3 JP4 JP5JP1
IN OUT
RY1
WPE1
T
250V 2.5A
1 N
BOARD TERMINAL
L N
PHASE SINGLE SUPPLY POWER
TERMINAL BOARD
A
BL
BK
BR
UNIT OUTDOOR TO
NONENONEUSE USE USE USE USE USENONE
47
CT1
BL
BL

8
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
igure L-2. Printed Wiring Diagram for AH-N45DP2
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL
BOARD TOPN
TO TERMINAL BOARD
TOPN
TO TERMINAL BOARD
BOTTOMN
FROM TERMINAL
BOARD TOP1BLACK

FROM
TERMINAL
BOARD BOTTOM
LBROWN
FROM FAN MOTOR
FROM
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)

9
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Figure L-3. Electronic Control Circuit Diagram for AH-N56DP2
L2
R37
13K
MODEHOT
KEEP
SWE- AT
WIRE LESS
PWR ON
DEIC
TEST
NONE NONE NONE NONE
JP13JP12JP11JP10
JP9JP8JP7
2 PIPE
1 PIPE
FAN DRY
E 2 DEIC
E 1
NONE
JP6
COOLHEAT
FAN1 FAN2
R23R21R19
ERTER
CLUS
FAN OUT LOUV
JP19
NONE 15K15K
JP18
MODE L
R38
NONE USE USE USE USE USEUSENONE NONE
JP1 JP5JP4JP3JP2
I
SYMBOL DEF.
1/2W
R4547
TO OUTDOOR UNIT
BR
E A
BOARD TERMINAL
2
POWER SUPPLY SINGLE PHASE
N L
TERMINAL BOARD
N 1
2.5A 250V
T
WPE1
8 7 6 5 4 3 2
BCN1
1 1 2 3
C26
+
+
R33 R31
1
0.1µ25V
C16
SW1 : AUX.(TEST RUN)
C12
R37
C27
13K 3.3K
R17
16V 0.01µ
16V 0.01µ
10K
10K
JP18
JP13
JP12
JP11
JP10
10MHz
R11 47K
R12 6.8K
0.01µ 0.01µ 0.01µ
16V 16V 16V 10K
R34 R32
R26
R25 R24
R23
R22
R21
R20
R19
R18
R16
R15
R14
R13
R10
R9
R8
R7
C25
C23
C21
C20
C19 C18 C17C15
C14 C13
C11
C9
C8C6
C5
C4
C3
C2
C1
TR1
0.01µ
16V
25V
0.1µ
6 7 8
3 2 1
IC8
5
4
3.3K
22.6K(F)
GND
D1?4
C7
+
100µ
10V
25V
IC3
0.1µ
7805
47µ 25V
+
IC2
7812
0.1µ
50V
1000µ
35V
+
D7
2.7K(F)
5 3 1
2µ
MOTOR
FAN
1 2 3 4
(F)
10K
(F)
10k
10µ
16V 16V
10µ
10K10K
680
+
1000p
50V
Vss
AVss
AVcc
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
51
50
49
P20
P17
P16
P15
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
NC
P30
64 63 62 61 60 59 58 57 56 55 54 53 52
P44 P43 P42 P41
P40 P37 P36 P35 P34 P33 P32 P31
P64
P63
P62
P61
P60
AVR
AN7
AN6
AN5
AN4
AN3
AN2
AN1
AN0
P47
P46
P45
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Vcc
20 21 22 23 24 25 26 27 28 29 30 31 32
RST
MOD0 MOD1
X0 X1 P27 P26 P25 P24 P23 P22 P21
FRONT
OSC1
SSR1
0.01µ
1K
JP4 JP5
16V 0.01µ
400V
(PATTERN SIDE)
IC1
50V
1µ
0.1µ25V
13K 13K
10K
3
IC6
1
MB89537A
NC
JP1 JP2 JP3
3
2
MOTOR
FAN
IC
HOLE
3 2 1
4 5 1 2 3LOUVER
MOTOR
3 5 4 2 1
0.1µ
25V
D6 +
10K(F)
220µ 16V
Q1
9
8IC5
470
1/2W
SSR1
RY4
BZ1
1.8K
R28
R29
10K
IC4
8
2 11
2SW101
C24
25V
9
10
5V
12V
3
SSR2
R30
470
9
1/2W 2
R27
R4 22K
R5
1
Q2
20K R6
22K
16V
C10
0.01µ
2
16V
C22
0.01µ
2
12
3 32
1
23
D9 D8
13
CLEANING SWITCH 2
SWITCH 1 CLEANING
10K R39 R40
3.3K
R35
CLUSTER
13
2
1
CN1
CN2
CN3
CN5 CN6
CN7 CN8
INTERNAL
THERMOSTAT
CN9
NR1
1 3 1 3
JP21
Q5 Q6
Q7Q8
6 7 1 3 5
820(F)
0.1µ
D12
56
56
1/2W 1/2W
620 620
2 3 4 5 6 7 8 1 3 2 1
620 620 R106
R105 R104 R103
BCN101
IC101
+
10V
33µ25V
0.1µ
C101 C102
1/2W 1/2W
R101 R102
2.7K
3K
LED103 LED104 LED105 LED106
(FAN AUTO)
(FAN H) (FAN M) (FAN L)
R107
9
65 243 1
(CLUSTER)
LED107
GR BL
21
1
(OPERATION)
LED101 LED102
(TIMER)
23
10
R108
3
CN103
BCN102
CN102
CN10
CN101
275V
275V
0.1µ
R2 R1
2W 2W
SSR2
6
8
C28
275V
0.1µ
JP9
JP8
JP7
JP19
R38
NC
NC
NC
NC
L1
100
R41
1W
C31
0.033µ
275V
6.8K 6.8K
NF1
D14
+
C29
47µ
25V
10K
275V
RY4
R44
0.01µ
C34
1W
D
NC NC
47K 5.1K
RE
BL
CT1
BL
BL
BR
TH1 PIPE TEMP. 10kΩ(25˚C) TH2 PIPE TEMP. 15kΩ(25˚C)

10
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
igure L-4. Printed Wiring Diagram for AH-N56DP2
2
FB441
2
FB441
2
2
FB441
2
FB441
2
TO TERMINAL BOARD
TOPN
TO TERMINAL BOARD
TOPN
TO TERMINAL BOARD
BOTTOMN
TO TERMINAL
BOARD TOP
2
TO TERMINAL
BOARD BOTTOM
L
FROM FAN MOTOR
FROM
FAN MOTOR
FROM CLUSTER GENERATOR
FROM
CLUSTER
GENERATOR
FROM CLEANING SWITCH 1
FROM
CLEANING
SWITCH 2
FROM THERMISTOR
FROM LOUVER MOTOR
BCN101(BCN201)

11
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Microcomputer (IC1)
IC1 is a CMOS, one chip, 8-bit microcomputer.
Microcomputer port allocation is as follows.
Pin Terminal Input
No. Name Output Function
1P45 IN –
2P46 IN HOOT KEEP
3P47 IN SWEET
4AN0 IN ROOM TEMP.
5AN1 IN PIPE TEMP.
6AN2 IN CT
7 AN3 IN CLUSTER SENS.
8 AN4 IN MODEL
9AN5 IN LOUVER SET
10 AN6 IN FAN SET COOL
11 AN7 IN FAN SET HEAT
12 AVCC IN 5V
13 AVR IN 5V
14 AVSS IN 0V
15 R60 IN WIRELESS SIGNAL
16 R61 IN AC CLOCK
17 R62 IN SW1
18 R63 IN WIRELESS HEDDER
19 R64 IN POWER ON
20 RST IN RESET SUGNAL
21 MOD0 IN 0V
22 MOD1 IN 0V
23 X0 IN OSILLATION
24 X1 IN OSILLATION
25 VSS IN 0V
26 P27 IN –
27 P26 OUT FAN MOTOR A CONTROL
28 P25 OUT OUTDOOR FAN M. CONTROL
29 P24 OUT VALVE CONTROL
30 P23 OUT COMPRESSOR CONTROL
31 P22 OUT BUZZER
32 P21 OUT CLUSTER GENERATOR CONTROL
Pin Terminal Input
No. Name Output Function
33 P20 IN CLEANING SW1
34 P17 OUT LOUVER MOTOR
35 P16 OUT LOUVER MOTOR
36 P15 OUT LOUVER MOTOR
37 P14 OUT LOUVER MOTOR
38 P13 NC –
39 P12 NC –
40 P11 NC –
41 P10 NC –
42 P07 OUT LED 107 (GREEN)
43 P06 OUT LED 107 (BLUE)
44 P05 OUT LED 101
45 P04 OUT LED 102
46 P03 OUT LED 103
47 P02 OUT LED 104
48 P01 OUT LED 105
49 P00 OUT LED 106
50 N5 NC –
51 P30 OUT CLUSTER POLARITY CONTROL
52 P31 IN DEICE 2
53 P32 IN DRY FAN
54 P33 IN PIPE 1
55 P34 IN PIPE 2
56 P35 IN INDOOR FAN MOTOR R.P.M.
57 VCC IN 5V
58 P36 IN CLUSTER SET
59 P37 IN –
60 P40 IN TEST
61 P41 IN DEICE 1
62 P42 IN/OUT EEPROM
63 P43 IN/OUT EEPROM
64 P44 IN OUT FAN

12
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
FUNCTIONS
1. Temperature control characteristic
1-1 COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C5).
Figure H-1
1-2 DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru D3).
Figure H-2
2. Operation modes
2-1 COOL operation
The compressor turns on or off, at the thermostat
lines C4 and C5. The outdoor fan motor is also
controlled with the compressor.
Figure H-3
2-2 DRY operation
On the switch on, the compressor always starts to
operate for 2 minutes with fan speed "DL" .
The microcomputer reads the room temperature 2
minutes after this first compressor operation.
This room temperature is set as the preset
temperature automatically.
The preset temperature ranges from 18˚C to
32˚C. When the room temperature is below 18˚C,
the preset temperature is set to 18˚C, and when
the room temperature is over 32˚C, the preset
temperature is set to 32˚C.
Dry operation is divided into three zones (Cooling
zone, Dehumidifying zone and Circulating zone)
by thermostat lines (D1 to D3), and the
compressor and the fan motor are controlled in
each zone as shown in Table H-1.
18 32
C1
C2
C3
C4
17.5
18.5
19.5
19.0
20.5
31.5
33.0
32.5
33.5
34.5
Preset temperature (˚C)
Room temperature (˚C)
C5
Room temperature(˚C)
Preset temperature (˚C)
18 32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Room temperature
Preset temperature
Room
temperature
transition
C4
C5
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
3
Room temperature
Preset temperature
Room
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
Figure H-4

13
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Fan
switch
DL
Fan
speed
Fan switch
(AUTO)
AH-
N45DP2
(r.p.m.)
750 830
780 860
820 960
840 980
940 1030
1000 1120
1050 1210
AH-
N56DP2
DH DRY
COOL
CL COOL
SOFT
CAL
CM COOL
LOW
CAH
CH COOL
HIGH
Table H-1
Compressor
Cooling zone
Dehumidifying zone
Circulating zone
Fan speed
ON "DH"
"DL"
"DL" or OFF
ON
OFF
3. Fan speed
Fan speeds are given by the indoor fan motor,
"DL"~"HH" which are available in the following
operation mode.
Table H-2
4. Freeze preventive
When the indoor pipe temperature falls below 0˚C
during cool operation or dry operation, the
compressor is turned off.
5. Test run
If the "AUX" button on the unit is pressed for 5
seconds or more during operation, cool test
operation starts. The operation LED (red) flickers
during test run.
To put the system in the heating test run mode,
start the cooling operation and select the heating
mode on the remote control. In cool and heat
mode continuous compressor on operation is
performed. In dry mode the operation is in
dehumidifying zone. In fan only mode the indoor
fan motor runs continusly.
6. Timer
6-1 ON/OFF TIMER
When the unit operates during one hour after the
OFF-time is set, thermostat setting is
automatically shifted (+1˚C in cool operation and
dry operation, -3˚C in heat operation, 16˚C -
32˚C). When the ON-timer is set in heat operation
and cool operation, operation starts before 0 to 30
minutes(depends on the room temperature) so
that preset temperature is obtaind at set time.
6-2 ONE-HOUR TIMER
When ONE-HOUR timer is set, the unit turns off
automatically after one hour. The one hour timer
operation has priority over other time operation,
such as the TIMER ON and TIMER OFF. If the
ONE-HOUR TIMER button is pressed again
during operation, the unit will operate additionally
for another one hour.
7. Automatic air conditioning
automatic air conditioning is selected, the
operation mode and preset temperature are set
automatically according to the room temperature
on starting operation.
Table H-3
Room temperature
Preset temperature
Room
temperature
transition
C3
C2
C1
States 1 & 5 :"CAH"
States 2 & 4 : "CM"
States 3 : "CAL"
a. COOL operation
3
4
5
1
2
When DRY mode is selected by the micro
computer with AUTO operation, the fan speed
lamps on the indoor unit panel will indicate
identically with the fan speed symbols on the
remote control dispaly, as the FAN speed setting
is changed accordingly. Despite, the actual fan
speed will not change, as it is determined
automatically by the micro computer.
8. Automatic fan speed
When the automatic fan speed is selected in cool
or heat operation, the fan speed is automatically
changed by the thermostat lines C1 to C3 in cool
operation, and H1 to H4 in heat operation.
Figure H-5
Room temperature
at operation start
Operation
Mode
Preset
Temperature
Above 28˚C 26˚C
26˚C ~ 28˚C
24˚C ~ 26˚C
Below 24˚C
25˚C
24˚C
Room temperature
at operation start
COOL
DRY

14
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Timer LED
(Yellow) ON OFF
Judgement Normal
(Generator OK)
Failure
(Check circuit)
1) Cluster generator checking (STEP 1)
9. Outputs in each operation mode
Table H-4
10. Power on start
If the connecting wire JP5 is shorten on the PWB
ass'y, when the power is supplied by turning on a
circuit breaker, the air conditioner automatically
starts of operation in "AUTO".
(Refer to Figure L-2.and Figure L-4. Printed
Wiring Board.)
11. AUTO RESTART
Power failure occurs during operation, the unit will
restart in the same operation mode as before after
power recovery.
12. Test mode
Keep pushing the "AUX." buttons and supply the
power, the system will go to the test mode. In this
mode, the output of operation is switched by
pushing the "AUX." button in the unit or the
" " button in the remote controller.
Normal outputs are shown in Table Y-6 and Y-7.
13. Plasma cluster
Plasma cluster ion mode
SSR2 : ON
Relay (Cluster unit inside) : OFF
Minus ion mode
SSR2 : ON
Relay (Cluster unit inside) : ON
ON
OFF
ON
OFF
ON ON OFF
OFF ON OFF
ON
ON ON L/UL
UL/D
OFF D/OFF
OFF
OFF
OFF
Mode
Compressor Outdoor
Fan Motor
Cooling
Circulating
Indoor
Fan Motor
Valve
Coil
C
O
O
L
D
R
Y
Cooling
Circulating
Dehumidiflying

15
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Table H-6
AH-N56DP2
7
~
42˚C ON -2
~
45˚C ON
~
7˚C , 42˚C
~
OFF
~
-2˚C , 45˚C
~
OFF
0.3V
~
4.5V ON
~
0.3V , 4.5V
~
ON 0.3V
~
4.5V ON
~
0.3V , 4.5V
~
ON
~
0.3V , 4.5V
~
OFF 0.3V
~
4.5V OFF
~
0.3V , 4.5V
~
OFF 0.3V
~
4.5V OFF
OFF ON
ON OFF
STEP No Buzzer
Lam
p
s Cluster
Outdoor Indoor
Fan Louver
RED YELLOW FAN SOFT FAN LOW FAN HIGH FAN AUTO CLUSTER Power Selector
02
Room temp. Pipe temp.
ON ON ON ON BLUE OFF OFF OFF OFF OPEN
11
FEED BACK CIRCUIT CT INPUT(AN2 input voltage)
BLUE ON OFF ON
1000
rpm
OFF OFF OFF
OPEN
FLICK
21
Power On Start(JP5) Wireless(JP4) MODEL SELECTION(AN4 input voltage)
GREEN ON ON OFF
31
Sweat(JP3) Hot Keep(JP2) Out Fan(JP18) TEST(JP8) Cluster(JP19) Dry Fan(JP11)
OFF OFF OFF OFF
41
DEICE 1 DEICE 2 Louver Collection(AN5 input voltage)
OFF OFF OFF OFF
51
Pipe 1 Pipe 2 Cooling mode FAN speed Collection(AN6 input voltage)
OFF OFF OFF OFF OFF
61
EEPROM Micro SW Heating mode FAN speed Collection(AN6 input voltage)
OFF OFF OFF OFF OFF
ON
71 OFF OFF
EEPROM VERSION(UPPER 4bit)
OFF OFF OFF OFF OFF
OFF OFF OFF OFF
OFF OFF OFF81 OFF OFF CLOSE
OFF OFF OFF OFF OFF OFF
EEPROM VERSION(LOWER 4bit)
ON
ON ON ON ON
OFF
ON
ON ON ON
OFF OFF OFF OFF ON
OFF OFF OFF OFF
OFF
ON
ON ON ON
AH-N45DP2
7
~
42˚C ON -2
~
45˚C ON
~
7˚C , 42˚C
~
OFF
~
-2˚C , 45˚C
~
OFF
0.3V
~
4.5V ON
~
0.3V , 4.5V
~
ON 0.3V
~
4.5V ON
~
0.3V , 4.5V
~
ON
~
0.3V , 4.5V
~~
0.1V, 4.9V
~
OFF OFF 0.3V
~
4.5V OFF
~
0.3V , 4.5V
~
OFF 0.3V
~
4.5V OFF
OFF ON OFF ON ON
OFF ON ON ON OFF ON ON ON OFF OFF ON ON OFF ON ON ON
OFF OFF OFF
ON OFF ON
Sweat(JP3)
DEICE 1
Pipe 1
ON OFF ON
OFF ON
ON OFF
OFF OFF
FAN HIGH FAN AUTO
Cluster
STEP No Buzzer
Lamps
RED YELLOW FAN SOFT FAN LOW CLUSTER Power Selector
OFF
Outdoor Indoor
Fan Louver
BLUE OFF OFF OPENOFF02
Room temp. Pipe temp.
ON ON ON ON
OFF OFF
OFF
OFF
OFF OFF
EEPROM VERSION(UPPER 4bit)
OFF
81 OFF OFF
OFF OFF OFF
EEPROM VERSION(LOWER 4bit)
OFF OFF OFF
OFF OFF OFF
11
FEED BACK CIRCUIT CT INPUT(AN2 input voltage)
BLUE ON OFF ON
1000
rpm
OFF OFF
OPEN
FLICK
21
Power On Start(JP5) Wireless(JP4) MODEL SELECTION(AN4 input voltage)
GREEN ON ON OFF
31
Hot Keep(JP2) Out Fan(JP18) TEST(JP8) Cluster(JP19) Dry Fan(JP11)
OFF OFF
41
DEICE 2 Louver Collection(AN5 input voltage)
OFF OFF OFF OFF OFF
51
Pipe 2 Cooling mode FAN speed Collection(AN6 input voltage)
OFF OFF OFF
61
EEPROM Micro SW Heating mode FAN speed Collection(AN6 input voltage)
OFF OFF OFF
ON
71 OFF
CLOSE
OFF OFF OFF OFF OFF OFFOFF
ON
OFF
NONE
USE
ON
OFF
NONE
USE
AN3 ( 1)
0.1V
~
4.9V ON
~
0.1V, 4.9V
~
OFF
0.1V
~
4.9V ON
AN3 ( 1)

16
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT
measure the secondary voltage
of transformer.
YES
NO
YES
NO
The machine does not function
at all with remote controller and
switch on the indoor unit.
Using a tester, measure the
voltage between anodes of D1
and D2 on PWB ass'y.
Is the measured value
approx. 17.5 Vac ?
Replace the PWB with a new
one.
Is the WPE1
open circuit ?
Replace the fuse and varistor
with new ones.
Replace the transformer with
a new one.
YES
NO
Check the cleaning
switch 2(1),CN9, CN8
and lead wires.
Replace the cleaning switch 2(1).
(or reset connector)

17
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
YES
NO
NO
YES
The machine does not function
with remote controller
Push button " " on the
wireless remote controller.
Is transmitting
indicator of the remote
controller active ?
Is indicator lamp of
indoor unit proper ?
Replace the
PWB with a
new one.
Does beep sound
from the indoor unit ?
Using a tester,
measure the voltage
between terminals
of resistor R26
on the PWB ass'y.
Push the button
" ".
Are batteries of the
wireless remote controller
proper ?
Replace the batteries
with new ones.
Replace the wireless
remote controller.
When the signal is
received, does the voltage
change ?
Replace the PWB with a new
one.
PWB is normal.
Inspect the outdoor unit.
NO
YES
NO
YES
Replace the photo
detector unit with a new
one.
NO
YES

18
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
The room is not cooled at all
or not cooled.
The compressor does not operate.
Measure resistances of TH1 and TH2.
Push the button "AUX." on
the indoor unit, for more than 5 sec.
Is the voltage
between terminal "N" and
"1" of the terminal board the
power supply voltage ?
Are the resistances
conformed Fig. 1 ?
Replace the thermistor ass'y
with a new one.
NO
YES
YES
NO
Replace the PWB ass'y with a new one.
Fig. 1
Using a tester, measure voltage at
the terminals on the terminal board.
100
80
60
40
20
0
-10 0 10 20 30 40
Resistance
Thermistor
Room temperature
Heat exchange
Color
Yellow
Orange
To measure the resistance, first remove
the connector as shown at right.
Room temperature
thermistor TH1
Tester
Connector
No. 3 to 4
No. 1 to 2
Fig. 1 Temperature properties of indoor thermistors
K
Heat exchange thermistor
TH2 (orange)
25°C resistance 15 K
Room temperature
thermistor TH1 (yellow)
25°C resistance 10 K
Heat exchange
thermistor TH2
Tester
41
CN4
The control circuit is normal.
The compressor may be defective.
The running capacitor may be
defective.
Refrigerant may be leaked.
The outdoor fan motor may be
defective.
The outdoor fan motor capacitor
may be defective.

19
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
For AH-N56DP2 / AU-N56DP2
The room is not cooled at all
or not cooled.
The compressor does not operate.
Measure resistances of TH1 and TH2.
The control circuit is normal.
The compressor may be defective.
The running capacitor may be
defective.
Refrigerant may be leaked.
The outdoor fan motor may be
defective.
The outdoor fan motor capacitor
may be defective.
Push the button " AUX." on
the indoor unit, for more than 5 sec.
Is the voltage
between terminal of black
lead wire on the relay in the outdoor unit
and terminal "N" on the terminal board the
power suuply voltage ?
Are the resistances
conformed Fig. 1 ?
Replace the thermistor
ass'y with a new one.
NO
YES
YES
NO
Replace the PWB ass'y with a new one.
Using a tester, measure voltage at
the terminals on the terminal board.
Replace the relay in the outdoor unit with
a new one.
Is the voltage
between terminal " N " and
" 2 " in the outdoor unit
the power supply
voltage ?
YES
NO

20
AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2
Cycle temperature and service port pressure
REFRIGERATION CYCLE
Figure R-1. Refrigeration Cycle for AH-N45DP2 / AH-N56DP2
1
2
Capillary tube
3
Outdoor unit
Condenser
Evaporator
Indoor unit
Compressor
Flare coupling Flare coupling
4
3-way
valve
2-way
valve
Accumulator
Indoor side Outdoor side
Temperature (˚C) Temperature (˚C)Relative humididity (%) Relative humididity (%)
27 47 35 40
Cooling
ISO condition
Dimension of Capillary tube
AH-N45DP2 AH-N56DP2
Cooling Cooling
Model
NO. Condition
Based on 'ISO 5151 : 1994(E), condition T1' (at 220V refrigerant pipes length 7.5m)
1
2
3
4
Service port pressure
83˚C 81˚C
40˚C 37˚C
11˚C 11˚C
7˚C 4˚C
0.46MPa 0.46MPa
O.D. I.D. L
Capillary tube ø 3.5 ø 2.2 800
O.D. I.D. L
Capillary tube ø 3.2 ø 2.0 400
AH-N45DP2 AH-N56DP2