Sharp AE-X15PU, AE-X18PU, AE-X24PU Service Manual

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AE-X15PU

SERVICE MANUAL

SA210AEX15PU/T

SPLIT TYPE

ROOM AIR CONDITIONER

(OUTDOOR UNIT)

MODEL

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.

CONTENTS

CHAPTER 1. SPECIFICATION

[1] SPECIFICATION............................................ 1-1

[2] EXTERNAL DIMENSION............................... 1-2

........ 1-2[3] WIRING DIAGRM ..................................

[4] ELECTRICAL PARTS................................... 1-4

CHAPTER 2. ELECTROIC CIRCUIT

[1] BLOCK DIAGRAMS...................................... 2-1

[2] MICROCOMPUTER CONTROL SYSTEM....... 2-2

[3] FUNCTION ................................................... 2-6

CHAPTER 3. FUNCTION AND OPERATION
OF PROTECTIVE PROCEDURES

[1] PROTECTION DEVICE FUNCTIONS

AND OPERATIONS......................................3-1

[2] AIR CONDITIONER OPERATION IN

THERMISTOR ERROR................................3-3

[3] THERMISTOR TEMPERATURE CHARACT-

ERISTICS......................................................3-5

[4] HOW TO OPERATE THE OUTDOOR

UNIT INDEPENDENTLY...............................3-5

[5] GENERAL TROUBLESHOOTING

CHART..........................................................3-6

AE-X15PU
AE-X18PU
AE-X24PU

[6] MALF

METHOD.....................................................3-8

[7] OUTDOOR UNIT CHECK METHOD...........3-9

[8] TROUBLESHOOTING GUIDE....................3-12

[9] CHART........................................................3-13

CHAPT

[1] SCHEMATIC DIAGRAM...............................4-1

[2] STANDARD CONDITION.............................4-1

[3] CURRENT OF HEAT CONTROLLER..........4-1

[4] TEMPERATURE AT EACH PART A

PRESSURE IN 3-WAY VALVE.....................4-1

[5] FLOW CHART OF REFRIGERANT

CYCLE...........................................................4-3

[6] CHARACTERISTIC OF COOLING AND

HEATING OPERATION ...............................4-3

CHAPTER 5. DISASSEMBLY PROCEDURE

[1] OUTDOOR UNIT..........................................5-1

[2] DISASSEMBLY OF CONTROL BOX........... 5-4

CHAPTER 6. INSTALLATION MANUAL.............6-1

Parts List

UNCTION(PARTS) CHECK

ER 4. REFRIGERATION CYCLE

ND

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.

This document has been published to be used for
after sales service only.
The contents are subject to change without notice.

Propeller fan Φ460, 3-wing

13.0 (330)

800

Oil

FV50S ( 350cc )

1 1

AUX3M24LV

CHAPTER 1. SPECIFICATION

[1] SPECIFICATION

[2] Outdoor

ITEMS

Power supply

Phase

Rated frequency

Reted voltage

System

Indoor units number

Maximum length (per unit)

Maximum height difference

Performance

Capacity (Min.-Max.)

Rated

(Cooling)

Rated

(Heating)

Noise level

Air flow quantity

Fan speed

Compressor system

Compressor

Type

Fan system

Fan motor

Fan

Refrigerant system

Condenser

Refrigerant control

Refrigerant

Refrigerant filling

Connections

Refrigerant coupling

Refrigerant tube size
(A:Gas line,B:Liquid line)

Drain joint

Others

Net dimensions

Net weight

Moisture removal (Liters/h)

Power input

Running current

Capacity (Min.-Max.)

Power input

Running current

INDOOR MODEL AE-X15PU

V

Hz 60

ft (m)

ft (m)

Btu/h 14000(5000 - 14000)

1/h 3.2

W 1120

A 7.5

Btu/h

W

A

Cooling dB(A)

Heating dB(A)

Cooling m3/min

Heating m3/min

Cooling rpm

Heating rpm

Width

Height

Depth

inch(mm)

inch(mm)

inch(mm)

lb (kg)

Single

208/230

65.6 (20)

32.8 (10)

18000(4500 - 20000)

1550

10.0

49

50

42.7

45.8

800

SIAM(13.0cc)SNB130FGBMT

900W

Twin Rotary

CMOTLB537JBEZ

8poles,43W

Louver fin and Grooved tube type

Expansion valve FUJIKOKI Φ1.8

R410A

2.64lb (1200g)

Flare type

A: 1/2" (Flared connection 1/2")

B: 1/4" (Flared connection 1/4")

Connected part O.D.Φ16

33.5 (850)

28.0 (710)

93.7 (42.5)

AE-X18PU

Single

208/230

60

98.4 (30)

49.2 (15)

17000(6000 - 19000)

--

1415 2440

8.0

21600(5500 - 25000) 24000(5500 - 26000)

1920

11.0

52 53

42.3

42.3

820

820 820

SIAM(13.0cc)SNB130FGBMT

900W

FV50S ( 350cc )

Twin Rotary

CMOTLB537JBEZ CMOTLB537JBEZ

8poles,43W 8poles,43W

Propeller fan Φ460, 3-wing

Louver fin and Grooved tube type Louver fin and Grooved tube type

Expansion valve FUJIKOKI Φ2.2 Expansion valve FUJIKOKI Φ2.2

R410A R410A

3.31lb (1500g) 3.31lb (1500g)

Flare type Flare type

A: 1/2" (Flared connection 1/2")

B: 1/4" (Flared connection 1/4")

Connected part O.D.Φ16 Connected part O.D.Φ16

33.5 (850)

28.0 (710)

13.0 (330)

103.6 (47)

AE-X24PU

Single

208/230

60

1

98.4 (30)

49.2 (15)

22000(6000 - 22000)

6.8

12.0

2200

12.5

5453

41.8

44.4

820

SIAM(13.0cc)SNB130FGBMT

900W

FV50S ( 350cc )

Twin Rotary

Propeller fan Φ460, 3-wing

A: 1/2" (Flared connection 1/2")

B: 1/4" (Flared connection 1/4")

33.5 (850)

28.0 (710)

13.0 (330)

103.6 (47)

AE-X15PU

NOTE:Test conditions are based on AHRI 210/240. (Refrigerant piping length [per unit] : 25ft [7.6m])

[TEST CONDITIONS COOLING]
INDOOR DB26.7℃/WB19.4℃
OUTDOOR DB35.0℃/WB --

1 – 1

AE-X15PU

[2] EXTERNAL DIMENSION

Length unit: inch (mm)

33.5 (850)

36.2 (920)

35.6 (905)

0.2 (4.5)

0.6 (16)

2.0 (50)

2.8 (72)

14.9 (379)

15.6 (395)

14.3 (363)

13.0 (330)

[3] WIRING DIAGRAM

21.9 (557.4)

5.6 (141.3)

28.0 (710)

0.8 (20.7)

8.3 (210.9)

5.6 (143)

3.3 (83)

AE-X15PU/AE-X18PU

1 – 2

AE-X15PU

[4] ELECTRICAL PARTS

AE-X15PU / AE-X18PU

Compressor SNB130FGBMT SIAM (13.0 CC) (FCMPRA333JBKZ)

SHA-52FV-D843-2

AE-X24PU

Compressor SNB130FGBMT DC motor (FCMPRA333JBKZ)

SHA-52FV-D843-2

Compressor SNB130FGBMT DC motor (FCMPRA333JBKZ)
Fan motor RDN-280-60-8C DC motor (CMOTLB488JBEZ)

AE-X24PU

skrameRledoMemaN traP

)ZEBJ735BLTOMC( rotom CDrotom naF

)V052 A02( ZZBJ090AG-SFQ-1 uF

)V052 A51.3( ZZBJ870AG-SFQ-2 uF

)V052 A2( ZZBJ770AG-SFQ-3 uF

)V052 A02( 0EBJ090AG-SFQ-5 uF

skrameRledoMemaN traP

)ZEBJ735BLTOMC( rotom CDrotom naF

QFS-GA091JBZZ (25A 250V)-1 uF

)V052 A51.3( ZZBJ870AG-SFQ-2 uF
)V052 A52( ZZBJ770AG-SFQ-3 uF
)V052 A02( 0EBJ090AG-SFQ-5 uF

skrameRledoMemaN traP

)V052 A02( 0EBJ410AG-SFQ-1 uF

)V052 A51.3( ZZBJ870AG-SFQ-2 uF
)V052 A52( ZZBJ770AG-SFQ-3 uF
)V052 A02( 0EBJ910AG-SFQ-5 uF

1 – 3

CHAPTER 2.

ELECTROIC CIRCUIT

[1] BLOCK DIAGRAMS

1. Outdoor unit

Expansion valve circuit Expansion valve

AE-X15PU

20A(25A for AE-X24PU)

20A

2 – 1

AE-X15PU

[2] MICROCOMPUTER CONTROL SYSTEM

1-1 Electronic control circuit diagram: AE-X15PU

R199

R223

R197

R171

135

+

50V

C111

9

8

2.2u

C110

20

26

21

22

V

BSV

BSU

S2(V

IS1 U)

IS3(W

50V

C202

1000p

50V

C203

1000p

50V

C204

1000p

5V

100J

R168

R167 100J

Z

R234

R233

R232

R231

R230

18
19
20

N

ZD3

4.7V

CIN

R50

1/4W

1.8KF

15

C122

000P 50V

630V 0.1uF

M

5V

R128

15.4KF

R217

R127

5.4KF

18V-P

1/4W 150J

15V

COMPRESSOR

IPM/A

P

24

JPL1AJPL1B

O

2A

250V

FU3

FU5

23

VCC

IC11

15

C199

100J

R163

82KFX8

250V/20A

O

C29

BSW2VBB

50V

1000p

C200

100J

R164

BT7

23

U

R211 R212

R210

FAN MOTOR

0V

0.1u

630V

+

50V

2.2u

C109

25

50V

1000p

50V

C201

1000p

100J

R165

BT9

BT8

21

22

V

W

C14

R214

R213

R215

R216

- +

420V 750u

C9

- +

420V 750u

C8

CN3

W

100J

R166

DB1

BT5

GRAY

JPL2C

JPL2D

0V

R156

C6

C7

C5

275V 1uF

C4

275V 1uF

250V/20A

BT1

BROWN

L2
L2

R90

D2

SA1

R147

1/10W 10KJ

+

1/10W 1KF

C6A

C7A

250V 4700PX2

250V 0.01uX2

C5A

C4A

250V 0.01uX2

510V

NR1

BT4

GREEN

C97

C79

10V 220uF

R91

1/10W 6.49KF

D13

R104A

250V 4700PX2

5V

PC1

R4

1/10W 3.3KJ

D1

/YELLOW

2

L1

GRAY

PTC1

MRY1/B

GRAY

BT6

CT1

C3

R43

510K 1/4W

L3

C2

L2

C1

R1

BT2

BLUE

L1
L1

Terminal Board

R89

1/4W 1KF

275V 1uF

510K 1/4W

1/2W 1M

FU1

R173

R222

R220

R221

R198

R172

+

50V

7

2.2u

0.1u

C 08

R169

10K

1K

R170

F

10K

0V

F

R182

10K F

R178

R179

10K

U

2+3

13KF

-

GND16GND1VREG13RS10D AG11LW9LV8LU7HW6HV5HU

IC10/C

R177

1

1K

0V

25V

R176

0V

R187

50V

C107

0.01uF

50V

C115

1000p

F

0V

10K

R186

50V

C106

1000p

5V

D20

(R230-R235 1W 140mΩFX5)

(DC Over Current Detect)

0V

C

Q7

0V

R107

1/4W 330Ω

R200

1/10W 1KJ

2

1

PC4

3

LTV817S-C

R110

Q5

R111

1/4W 1KJ

0V-P

DB2

25V 0.1u

R106

1/10W 3.3KJ

0V

5V

PC3

1

C81

50V 0.01uF

(R101A-R101C,R104A-R 04C 1/4W 33K)

R101B

R101C

R101A

R104B

b

a

0V

1000P 50V

C75

R75

1/10W 1.8KJ

R74

R76

1/10W 4.7KJ

1/10W 56KJ

1

23

PC2

1

2 3

LTV817S-C

PC853HXP

R142R141

C13

0.1u 25V

1K 2WX3

R140

C12

BT3

250V 4700P

RED

℃

Fuse

102

0V

R225

R224

R183

ZD6

F
2K

9

IC10/D

R 85

F

10K

0V

4.7V

0V

2KF

R188

0

+

8

1K

A_2

1/4W 2ΩFX12

F

15V

10K

R192

5V

5V

20KF

R 89

C112

50V

1000p

R190

2KF

R193

IC10/B

D21

F
20K

-6+

R191

5V

0V

20KF

2KF

R195

R194

5

11

25V

0.1uF

7

C114

1K

C113

B_2

0V

5V

LED1

2.7K

R73

Q

0V

OSC1

10MHz

D

0V

C83

50V 1000pF

Q6

5V

C82

R80

50V 0.01uF

R105

(Reset)

270

1/10W 22KJ

R78

R77

2 3

R10 C

PC81716

R146

1/10W 100KJ

250V/3.15A

FU2

510V

NR2

R181

1/2W 120J

RY1/B

(Serial Communication)

C130

275V 0.33uF

1

3

CN4

(4-Way Valve Drive)

F

R196

20K

1000pF

50V

PRE-HEAT

JPA

40Hz COOL TEST

JP92

C33

4.7u

+

25V

100K

C32

R79

100J

12

3

C5

C31

270

R

0V

0V

℃

-15 AUTO OFF

5V

+

50V

C98

4.7u

PAD

R92 1K

0V

R129

10K

5V

+

C123

10V 100u

25V

0.1u

0V

25V

0.1u

5V

IPM/B

15V

C124

0V

0.01u 25V

FB3

(Thermister)

2 – 2

VUFB2VP18VVFB3WN

VN1

U

23

13

C49

0.1u 25V

+

C50

10u 25V

C37

25V

00u

+

25V

C38

0.1u

24V

ZD4

D11

WZYVX

PQ1 21

PQ2 22

PQ3 23

PQ 2

PQ5 25

PS0 26
PS1 27
PS2 28
PS3 29
PS 30
PS5 31
VCC 32
VCC 33
VSS 3

C 35

PR0 36
PR1 37
PR2 38
PR3 39
PR 0
PR5 1
MD2 2
MD1 3

MD0
X0 5
X1 6

VSS 7

INITX 8
PA2 9
VSS 50

PC355

PC25

PC153

PC052

VCC51

B_2

A_2

10K

R64 10K

R63

1235678

CN8

TH1

TH2

TH3

Exchange)

(Compressor)

(Heat

12

0.1u

25V

C55

50V

C44

1000pF

100J

100J

R134

C30

100u

+

25V

5V

C93

0.1u

JP2

U

PP 6

PP5 7

VSS 8

VCC 19

PQ0 20

PD060

PC759

PC658

PC557

PC56

10K

10K

R66

R65

TH4

(Suction)

(Out door)

C51

+

C52

R135

10V

10K

R62

0.1u

C41

MAX周波数

PP3 5

PD161

10u

0V

5V

22

25V

25V

50V

PP2 1

AVCC1062

5V

TH6

V

1000pF

100J

PP1 3

AVRH263

7

R136

5V

C126

+

WP

IC1

C125

C64

C69

R68

VN11VP6UN10UP5NC25NC

VWFB

W

2

0.1u

25V

C53

+

25V

C54

10uF

50V

50V

50V

C40

C42

C 3

1000pF

1000pF

00J

100J

R137

R132

FB2

12V

R204

10K

0K

R202

R205

10K

0V

JP1

5V

W/C设定用

M X 6

PM1 8

PM2 9

PM3 0

PP0 2

P91 5

PF0 11

PM0 7

PB671

PB570

PB69

PB368

PB267

PB166

PB065

AVSS106

25V

0.1u

D19

00u

0V

10V

5V

M

5V

C66

C67C68

10KF

15V

0.01u 50V
R123

(C64,C66-C69)

0V

R120

R69

R70

6.8KF

R71

(R61,R68-R71)

R61

(PWB Thermister)

1000p

8

100J

0V

P90

PB772

C87

R124

IC9/B

2KF

R133

IC7

0.01u

D18

P87 3

PA073

100

-2+

9

8

50V

1

C39

50V

MRY1/A

P86 2

PA17

3

2KF

R143

VNC16VNC

1000pF

CN12

VCC 1

VSS75

0V

C90

C89

Z

0V

25V

0.1uF

5V

RY1/A

111213115

C94

5V

C95

VSS100
P8599
P898
P8397
P8296
P8195
P809
PJ793
PJ692
PJ591
PJ90
PJ389
PJ288
PJ187
PJ086
PH285
PH18
PH083
PG582
PG81
PG380
PG279
PG178
PG077
VCC76

5V

000pF

50V

0.1u
25V

R150

5V

0V

17

C47

100uF

+

C48

R45

R46

10V

+

25V

C128

+

C127

0V

0V

R151

20KF

F

20K

FO

1

10V

50V

10K

0V

C45

0.01uF

1KJ

C46

50V

1000p

12356

(Expansion Valve)

1 16923567 10

ULN2004L-D16-T

100u

0V

0.1u

3
2

CN-1

1

5V

10KJ

R122

(PWM Output)

0V

5

3
2
1

F出力

18V-P

R87

C84

1

TR1

8

250V 4700P

2200P

O

35V

+

D1

R17

1/2W 300K

C27

CN-2

PWM Output)

5V

15V

1/4W 5.1K

R22

150u

2

5

1kV

D5

(Debug Output)

5V

(Debug Output)

12V

0V-P

C26

3

C

1

KIA7815

C25

+

10K

C19

D6

16

7

5

800V 1A

C

D

b

5V

a

10V

100u

0V

25V

0.1u

(Inverter Current Detect)

0V

250V 4700P

C85

C105

(Switching Power Supply)

R99

R98

CND

1369578

2

1K

R152

.7K

R154

.7K

R155

CNM

5V

25V

0.1u
R21

2

25V

R82

0.1u

+

35V

150u

C20

680u

D7

13

S8VDD
S

FB
CL
VCC D

IC2

MIP2K30MS

1KJ

1KJ

1K

R153

123

1/4W 2.2K

10K

25V

11

C17

1
2
3

R250R24

C21

470R23

+

D12

1uF 50V

R 6

0V

R

0V

0.1uF 25V

C23

10KF

0.1uF 25V

R88

10K

35V

C24

150u

C18

C 6

261KF

Q

0V

R94

1KJ

(Monitor)

FB1

F10K

R26

IC3

9

2200P 50V

2200P 50V

+

C15

2.2u 50V

D4

(Flash Writer)

0V

470

R15

23

1

PC6

LTV817S-C

15K

R14

0V

1-2 Electronic control circuit diagram: AE-X18PU

0V

R225

R224

R199

R223

R173

R222

R221

R198

R172

1/4W 2ΩFX12

F

F

10K

10K

0V

F

F

10K F

R178

13KF

IC10/C

R177

0V

0.01uF

C115

0V

1000p

R107

1/4W 330Ω

LTV817S-C

-

1K

1000p

5V

0V

R183

R182

10K

R179

10K

12+13

R192

0V

ZD6

4.7V

0V

5V

1

F

R176

2KF

2K

0V

R189

R188

R187

10+9

50V

F

10K

IC10/D

8

R186

C112

1K

R185

D20

A_2

0V-P

50V

2.2u

17

U

GND6GND1VREG3RS0DIAG11LW9LV8LU7HW6HV5HU

25V

0.1u

C108

50V

C107

10K

1K

R170

50V

C106

(R230-R235 1W 140mΩFX6)

(DC Over Current Detect)

0V

C

Q7

R200

1/10W 1KJ

2

1

PC4

3

R110

R111

1/4W 1KJ

Q5

DB2

D

C83

25V 0.1u

0V

a

1/ 0W 4.7KJ

2 3

C13

C12

R106

1/10W 3.3KJ

Q6

C82

5V

R105

PC3

PC81716

2 3

1

C81

50V 0.01uF

R146

R101B

b

0V

R76

23

R101C

R75

1/10W 1.8KJ

1/10W 56KJ

PC853HXP

R10 C

1/10W 100KJ

(R101A-R101C,R104A-R104C 1/4W 33K)

R101A

R104B

1000P 50V

C75

R74

1

PC2

LTV817S-C

R142R141

0.1u 25

1K 2WX3

R140

(Serial Communication)

BT3

250V 4700P

/YELLOW

GREEN

RED

℃

Fuse

102

CN4

2KF

R193

15V

IC10/B

5V

D21

20KF

F

R190

20K

50V

1000p

Q

0V

50V 1000pF

50V 0.01uF

1/10W 22KJ

250V/3.15A

FU2

NR2

RY1/B

1

3

-6+

R191

510V

R181

C130

5V

0V

20KF

2KF

R195

R194

5

11

25V

0.1uF

7

C114

1K

B_2

0V

5V

LED1

2.7K

R73

OSC1

5V

R80

(Reset)

R78

1/2W 120J

275V 0.33uF

(4-Way Valve Drive)

15V

COMPRESSOR

IPM/A

P

24

JPL1AJPL1B

O

2A

250V

FU3

FU5

510K 1/4W

BT2

BLUE

O

23

VCC

IC11

5

C199

100J

100J

R163

R164

82KFX8

250V/20A

PTC1

C3

R43

L3

L2

C1

R1

L1
L1

0.1u

C29

C109

BSW2VBB

50V

1000p

50V

C200

00J

R165

BT7

BT8
22

23

V

U

R213

R211 R212

R210

BT5

GRAY

L1

GRAY

GRAY

BT6

CT1

C2

FAN MOTOR

CN3

0V

630V

+

50V

2.2u

21

26

25

W

S3(W)

C202

1000p

50V

C201

1000p

100J

R166

BT9

21

W

C14

R214

R215

R217

R216

- +

420V 750u

C10

- +

420V 750u

C9

- +

420V 750u

C8

DB1

JPL2C

MRY1/B

JPL2D

R89

1/4W 1KF

0V

275V 1u

510K 1/4W

R156

275V 1uF

275V 1uF

1/2W 1M

FU1

BT1

BROWN

C110

BSV

50V

1000p

R167 100J

N

C N

L2

L2

135

+

50V

2.2u

22

V

50V

C203

1000p

C204

100J

R168

Z

18

19

20

1/4W

1.8KF

15

630V 0.1uF

M

R147

R90

D2

C6

C7

C5

C5A

C4

C4A

SA1

250V/20A

R171

20

19

S1(U

IS2(V

50V

1000p

5V

R235

R234

R233

R232

R231

R230

ZD3

4.7V

R50

C122

R128

15.4KF

R127

15.4KF

1/10W 10KJ

C79

+

R91

1/ 0W 1KF

250V 4700PX2

C6A

C7A

250V 4700PX2

250V 0.01uX2

250V 0.01uX2

510V

NR1

BT4

/YELLOW

GREEN

2

R197

R220

+

C111

18

BSU

R 69

1000P 50V

5V

18V-P

1/4W 150J

C97

10V 220uF

1/10W 6.49KF

D13

R104A

5V

PC1

1

R4

1/10W 3.3KJ

D1

C113

1000pF

PRE-HEAT

0V

10MHz

100K

270

270

R77

R196

20K

50V

12

IC5

R

F

0V

0V

JPA

℃

- 5 AUTO OFF

5V

+

50V

C98

4.7u

PAD

40Hz COOL TEST

JP92

R92 1K

0V

R129

5V

+

C123

C33

25V

4.7u

+

25V

C32

0.1u

R79

100J

3

0V

25V

C31

0.1u

5V

10K

C124

10V 100u

0.01u 25V

FB3

VUFB2VP18VVFB3WN

IPM/B

C49

0.1u 25V

+

C37

25V

+

100u

25V

C38

0.1u

24V

ZD4

D11

15V

ZWYVX

PQ3 23

PQ 2

PQ5 25

PS0 26
PS1 27
PS2 28
PS3 29
PS 30
PS5 31
VCC 32
VCC 33
VSS 3

C 35

PR0 36
PR1 37
PR2 38
PR3 39
PR 0
PR5 1
MD2 2
MD1 3

MD0
X0 5
X1 6

VSS 7

NITX 8
PA2 9
VSS 50

PC153

PC052

VCC51

0V

B_2

A_2

10K

R63

1235678

CN8

TH1

TH2

(Thermistor)

(Compressor)

(Heat

VN1

U

3

23

C50

10u 25V

100J

5V

U

VCC 19

PQ0 20

PQ1 21

PQ2 22

PC557

PC56

PC355

PC25

0K

R64 10K

R65

TH3

Exchange)

(Outdoor)

2

C51

+

0.1u

25V

C55

50V

C44

1000pF

100J

R134

R135

C30

10V

100u

+

25V

C93

0.1u

JP2

PP 16

PP5 17

VSS 18

PD060

PC759

PC658

10K

10K

R66

TH6

TH4

5V

(Suction)

WP

VWFB

V

7

22

0.1u

C53

0.1u

25V

+

25V

10u

C52

50V

50V

C 3

C41

1000pF

1000pF

100J

100J

R137

R136

R204

5V

R202

0V

R205

JP1

MAX周波数

W/C设定用

M3 10

PP0 12

PP1 13

PP2 1

PP3 15

PF0 11

IC1

PB166

PB065

AVSS 06

AVRH263

AVCC 062

PD161

C126

25V

0.1u

C125

10V

100u

+

5V

C64

C66

C67C68

(C64,C66-C69)

C69

R62

R68

R69

R70

R71

(R61,R68-R71)

R61

(PWB Thermistor)

VN11VP6UN0UP5NC25NC

W

2

25V

25V

10u

C54

50V

50V

C40

C42

1000pF

100J

R132

12V

10K

10K

10K

0V

5V

M1 8

M2 9

M0 7

NMIX 6

PB570

PB69

PB368

PB267

D19

0V

5V

5V

10KF

15V

0.01u 50V
R123

0V

6.8KF

FB2

P91 5

PB671

M

8

R120

1000p

100J

0V

P90

PB772

C87

R124

IC9/B

2KF

R133

IC7

D18

0.01u

-2+

9

P87 3

PA073

100

1

C39

50V

8

P86 2

PA17

50V

2KF

R143

VNC6VNC

0V

0.1uF

5V

1000pF

CN12

MRY1/A

111213115

VCC 1

VSS00
P8599
P898
P8397
P8296
P8195
P809
PJ793
PJ692
PJ591
PJ90
PJ389
PJ288
PJ187
PJ086
PH285
PH18
PH083
PG582
PG81
PG380
PG279
PG178
PG077
VCC76

VSS75

0V

1000pF

50V

C90

0.1u

C89

25V

3

5V

Z

0V

5V

25V

RY1/A

5V

7

C47

+

C48

R45

R46

10V

C94

+

C95

25V

C128

+

C127

0V

0V

F

R151

20K

F

20K

R 50

FO

1

10V

100uF

50V

10K

0V

C45

0.01uF

1KJ

C46

50V

1000p

12356

(Expansion Valve)

1 16923567 10

ULN2004L-D16-T

100u

0V

0.1u

3
2

CN-1

1

5V

10KJ

R122

PWM Output)

0V

5

3
2
1

F出力

18V-P

R87

35V

C84

+

D1

1

TR1

8

250V 4700P

R17

C27

2200P

O

CN-2

(PWM Output)

5V

15V

1/4W 5.1K

R22

150u

2

5

1/2W 300K

1kV

D5

(Debug Output)

5V

(Debug Output)

12V

0V-P

C26

3

C

1

KIA7815

C25

+

10K

C19

D6

16

7

5

800V 1A

C

D

b

5V

a

10V

100u

0V

25V

0.1u

(Inverter Current Detect)

0V

250V 4700P

C85

C105

(Switching Power Supply)

R99

R98

CND

1369578

2

1K

R152

R 54

4.7K

.7K

R155

CNM

5V

25V

0.1u
R21

2

25V

R82

0.1u

+

35V

150u

C20

680u

D7

13

S8VDD
S

FB
CL
VCC D

IC2

MIP2K30MS

1KJ

1KJ

1K

R153

123

1/4W 2.2K

10K

25V

11

C17

1
2
3

R250R24

C21

470R23

+

D12

1uF 50V

R16

0V

R

0V

0.1uF 25V

C23

10KF

0.1uF 25V

R88

10K

50u

35V

C24

C18

C16

261KF

Q

KJ

R94

(Monitor)

F10K

R26

IC3

9

2200P 50V

2200P 50V

+

C15

2.2u 50V

D4

AE-X15PU

(Flash Writer)

0V

0V

FB1

470

R15

23

1

PC6

LTV817S-C

15K

R14

0V

AE-X15PU

1-3 Electronic control circuit diagram: AE-X24PU

0V

R225

R224

R199

R223

R173

R222

R220

R221

R198

R172

2ΩF X121/4W

F10K

F10KR182

F10K

0V

R183

R179

10KF

2+3

-

1

1K

R176

0V

50V

1000p

F

10K

5V

0V

123

1/4W 150J

F
0K

0V

R192

ZD6

4.7V

0V

5V

20KF

2KF

2KF

R189

R 88

R 87

10+9

-

IC10/D

8

R186

C112

1K

R185

D20

A_2

P

Q8

5V

R201

1/10W 1KJ

2

1

PC5

3

LTV817S-C

18V-P

BT15

BROWN

BLUE

R113

R112

1/ 0W 1KJ

50V

2.2u

17

R178

U

F13K

GND6GND1VREG3RS0DIAG11LW9LV8LU7HW6HV5HU

IC 0/C

R177

0V

25V

0.1u

C108

50V

R169

C107

0.01uF

10K

C115

1K

0V

R170

50V

C106

1000p

(R230-R235 1W 140mΩF X6)

(DC Over Current Detect)

C

0V

Q7

R107

1/4W 330Ω

1/10W 1KJ

R200

2

1

PC4

3

LTV817S-C

BT14

GRAY

CN14

R110

R111

1/4W 1KJ

Q5

Q11

DB2

(PAM PWB)

D

25V 0.1u

0V

a

1/10W 4.7KJ

1

2 3

C13

C12

R101A

250V 4700P

(R101A-R101C,R 04A-R104C 1/4W 33K)

R104B

C75

1000P 50V

R74

1

PC2

LTV817S-C

1K 2WX3

0.1u 25V
R140

BT3

RED

℃

Fuse

102

C83

50V 1000pF

R106

1/ 0W 3.3KJ

Q6

C82

5V

R105

PC3

PC81716

2 3

1

C81

50V 0.01uF

R146

1/10W 100KJ

R101B

R101C

R 0 C

b

0V

R75

1/10W 1.8KJ

R76

1/10W 56KJ

23

PC853HXP

R142R141

(Serial Communication)

/YELLOW

GREEN

F
2K

R193

15V

IC10/B

5V

D21

20KF

R190

50V

1000p

0V

R109

1/4W 330Ω

Q

BT16

0V-P

0V

50V 0.01uF

1/10W 22KJ

250V/3.15A

FU2

CN4

-6+

R191

RY1/B

1

0V

F2K

R194

5

7

B_2

0V

5V

5V

NR2

3

1K

(Reset)

15V

COMPRESSOR

IPM/A

P

24

O

JPL1B JPL1A

2A

250V

FU3

FU5

510K 1/4W

BT2

BLUE

23

VCC

IC11

5

C199

100J

R163

R164

YELLOW

250V/20A

PTC1

R43

L3

L2

R1

L1
L1

O

C29

BSW2VBB

1000p

50V

C200

00J

BT7

RED

23

U

82KF X8

R211 R212

R210

BT5

GRAY

L1

GRAY

BT6

CT1

C3

C2

C

100J

R165

BT8

WHITE

22

V

R213

GRAY

FAN MOTOR

CN3

0V

0.1u

630V

+

50V

2.2u

C109

26

25

W

S3(W)

50V

1000p

50V

C201

1000p

100J

R166

BT9

ORANGE

21

W

C14

R214

R215

R216

- +

420V 750u

- +

C10

420V 750u

- +

C9

420V 750u

C8

DB1

MRY1/B

R89

1/4W 1KF

275V 1u

510K 1/4W

1/2W 1M

FU1

BT1

135

C110

21

BSV

50V

C202

1000p

R167 100J

N

CIN

M

R217

BT13

BT12

JPL2C

GRAY

JPL2D

0V

R156

C6

C7

C5

275V 1uF

C4

275V 1uF

250V/25A

BROWN

L2
L2

+

50V

2.2u

22

50V

C203

1000p

C204

100J

R168

Z

18

19

20

1/4W

1.8KF

15

630V 0.1uF

GRAY

T13

GRAY

R147

R90

D2

SA1

R171

20

19

V

S1(U

S2(V

50V

1000p

5V

R235

R234

R233

R232

R231

R230

ZD3

4.7V

R50

C122

R128

15.4KF

R127

15.4KF

T12

1/10W 10KJ

C79

+

R91

1/10W 1KF

C6A

C7A

250V 4700PX2

250V 0.01uX2

C5A

C4A

250V 0.01uX2

510V

NR1

BT4

/YELLOW

GREEN

2

R197

+

C111

18

BSU

1000P 50V

5V

18V-P

1/4W 150J

C97

10V 220uF

1/10W 6.49KF

D13

R104A

250V 4700PX2

5V

PC1

R4

1/10W 3.3KJ

D1

5V

F20K

F

R196

20K

R195

11

25V

0.1uF

C114

000pF

C113

50V

℃

PRE-HEAT

JPA

- 5 AUTO OFF

LED1

5V

2.7K
C98

4.7u

R73

0Hz COOL TEST

PAD

JP92

0V

0V

OSC1

10MHz

5V

C33

25V

4.7u

+

25V

R80

100K

C32

0.1u

R79

100J

12

3

IC5

270

R78

C31

25V

0.1u

270

R77

R

510V

R181

1/2W 120J

C130

275V 0.33uF

(4-Way Valve Drive)

0V

IPM/B

D8

R48

R162R161

R47

1/4W

33 X4

15V

VUFB2VP18VVFB3WN

VN1

U

3

23

C49

0.1u 25V

+

C50

10u 25V

C37

25V

+

100u

25V

C38

0.1u

24V

ZD4

D11

WP

VN11VP6UN0UP5NC25NC

VNC6VNC

VWFB

W

V

2

7

21

22

0.1u

25V

C53

C51

0.1u

25V

+

C52

C55

1000pF

100J

+

D10

25V

10u

25V

C54

10u

0.1u

25V

50V

000pF

50V

C40

50V

000pF

50V

C41

1000pF

100J

R135

C42

C 3

R136

1000p

100J

100J

100J

R137

R132

R133

FB2

12V

D9

50V

C44

100J

R134

9

C39

50V

MRY1/A

1000pF

CN12

7

0V

C47

+

0.1uF

R45

5V

R46

RY1/A

11213115

100uF

25V

10K

FO

1

10V

C48

50V

C45

0.01uF

1KJ

C46

50V

1000p

12356

0V

(Expansion Valve)

IC7

C30

100u

10V

+

5V

25V

5V

0V

C93

0.1u

JP1

0V

Z

PQ 2

PQ5 25

PS0 26
PS1 27
PS2 28
PS3 29
PS 30
PS5 31
VCC 32
VCC 33
VSS 3

+

C 35

50V

PR0 36
PR1 37
PR2 38
PR3 39
PR 0
PR5 1
MD2 2
MD1 3

R92 1K

MD0
X0 5
X1 6

VSS 7

NITX 8
PA2 9
VSS 50

R129

10K

PC052

VCC51

C124

0V

0.01u 25V

+

JP2

YVX

W

PQ3 23

MAX周波数

U

PP0 12

PP1 13

PP2 1

PP3 15

PP 16

PP5 17

VSS 18

VCC 19

PQ0 20

PQ1 21

PQ2 22

PF0 11

IC1

PB065

AVSS106

AVRH263

AVCC1062

PD161

PD060

PC759

PC658

PC557

PC56

PC355

PC25

PC153

C123

10V 100u

B_2

A_2

C126

25V

0.1u

C125

10V

100u

+

5V

0V

C64

C66

C67C68

10K

10K

R64 10K

R65

R63

C69

10K

10K

R66

R62

R68

R69

R70

5V

FB3

1235678

CN8

TH1

(Thermistor)

TH2

TH3

TH4

R71

R61

TH6

5V

Exchange)

(Suction)

(Outdoor)

(Compressor)

(Heat

(PWB Thermistor)

R204

10K

R202

10K

R205

10K

0V

5V

W/C设定用

PM1 8

PM2 9

PM3 10

PM0 7

PB69

PB368

PB267

PB166

0V

5V

5V

10KF

0.01u 50V
R123

(C64,C66-C69)

0V

6.8KF

(R61,R68-R71)

0V

8

1 16923567 10

ULN200 L-D 6-T

10V

C94

100u

+

0V

5V

C95

M X 6

P90

P91 5

PB772

PB671

PB570

D19

C87

M

IC9/B

15V

8

R120

25V

VCC 1

P86 2

P87 3

0.1u

VSS00
P8599
P898
P8397
P8296
P8195
P809
PJ793
PJ692
PJ591
PJ90
PJ389
PJ288
PJ187
PJ086
PH285
PH18
PH083
PG582
PG81
PG380
PG279
PG178
PG077
VCC76

VSS75

PA17

PA073

5V

0V

0.01u

50V

D18

1000pF

50V

0V

C90

R124

100

0.1u

0V

C89

25V

1

-2+

R151

3

2KF

2KF

R143

R150

5V

Z

0V

3
2
1

P

C
D

b
a

C128

10V

100u

+

25V

C127

0.1u

CN-1

(PWM Output)

0V

(Debug Output)

5

3
2

CN-2

1

5V

(PWM Output)

(Debug Output)

F出力

5V

0V

15V

0V-P

18V-P

3

1

KIA7815

R87

250V 4700P

C85

1

TR1

8

C105 250V 4700P

C84

+

D1

2200P

1/4W 5.1K

35V

150u

2

5

R17

1/2W 300K

C27

1kV

16

7

5

D5

(Inverter Current Detect)

0V

20KF

F
20K

800V 1A

(Switching Power Supply)

O

12V

C26

IC

C25

+

C19

D6

CND

5V

CNM

25V

2

25V

35V

D7

S8VDD
S

IC2

R99

1KJ

R98

1369578

2

KR153

K

R152

R154

4.7K

R155

4.7K

123

5V

0.1u
R23 470

R21

1/4W 2.2K

R82

10K

0.1u

+

150u

25V

C20

680u

13

11

C17

1

FB

2

CL

3

VCC D

MIP2K30MS

1KJ

R250R24

C21

R88

D12

1uF 50V

R16

C23

R22

+

C24

C16

261KF

0V

R

R94

0V

(Monitor)

0.1uF 25V

10KF

F10K

R26

0.1uF 25V
IC3

10K

10K

35V

150u

9

C18

2200P 50V

+

C15

D4

Q

0V

1KJ

FB1

2200P 50V

2.2u 50V

R15

PC6

R14

(Flash Writer)

0V

470

23

1

LTV817S-C

5K

0V

2 – 4

2. Printed wiring board: AE-X15PU

AE-X15PU

This PCB is common for AE-X15PU/X18PU/X24PU, but for AE-X24PU,
there will be a sub-board. Will be released after approval.

2 – 5

AE-X15PU

[3] FUNCTION

1. Function

1.1. Restart control

Once the compressor stops operating, it will not restart for 180 sec­onds to protect the compressor.

Therefore, if the operating compressor is shut down from the remote
control and then turned back on immediately after, the compressor will
restart after a preset delay time.

(The indoor unit will restart operation immediately after the ON switch
is operated on the remote control.)

1.2. Outdoor unit 2-way valve freeze prevention control

If the temperature of the outdoor unit 2-way valve remains below 0°C
for 10 consecutive minutes during cooling or dehumidifying operation,
the compressor operation stops temporarily in order to prevent freez­ing.

When the temperature of the 2-way valve rises to 10°C or higher after
about 180 seconds, the compressor restarts and resumes normal
operation.

1.3. Outdoor unit overheat prevention control

During cooling operation, if the temperature of the outdoor unit heat
exchanger exceeds the outdoor unit heat exchanger overheat preven­tion temperature (about 55°C), the operating frequency is decreased
by about 4 to 15 Hz. Then, this operation is repeated every 60 sec­onds until the temperature of the outdoor unit heat exchanger drops to
about 54

Once the temperature of the outdoor unit
about 54°C or lower, the operating frequency is increased by about 4
to 10 Hz every 60 seconds until the normal operation condition
resumes.

If the temperature of the outdoor unit heat exchanger exceeds the out­door unit heat exchanger overheat protection temperature for (120
sec. : outdoor temperature ≥ 40°C, 60 sec : outdoor temperature <
40°C) at minimum operating frequency, the compressor stops operat-
ing and then restarts after about 180 seconds, and the above men­tioned control is repeated.

°C or lower.

heat exchanger drops to

1.4. Compressor overheat prevention control

If the temperature of the compressor exceeds the compressor over­heat prevention temperature (110°C), the operation frequency is
decreased by about 4 to 10 Hz. Then, this operation is repeated every
60

seconds until the temperature of the compressor drops below the

overheat protection temperature (100°C)
Once the temperature of the compressor drops below the overheat

protection temperature, the operating frequency is increased by about
4 to 10 Hz every 60 seconds until the normal operation condition
resumes.

If the temperature of the compressor exceeds the overheat protection
temperature (for 120 seconds in cooling operation or 60 seconds in
heating operation) at minimum operating frequency, the compressor
stops operating and then restarts after about 180 seconds, and the
above mentioned control is repeated.

.

1.5. Peak control

If the current flowing in the air conditioner exceeds the peak control
current (see the table below), the operation frequency is decreased
until the current value drops below the peak control current regardless
of the frequency control demand issued from the indoor unit based on
the room temperature.

Model Mode

AE-X15PU

AE-X18PU

AE-X24PU

Peak Control

Current(A)
Cooling 7.6 0
Heating 9.5 -1.5
Cooling 7.7 0
Heating 10.3 -1.8
Cooling 11.8 0
Heating 12.0 -1.9

Overload Current

Compensation(A)

1.6. Outdoor unit fan delay control

The compressor stops immediately after cooling, dehumidifying or
heating operation is shut down, but the outdoor unit fan continues
operation for 50 seconds before it stops.

1.7. Defrosting

1.7.1 Reverse defrosting

The defrost operation starts when the compressor operating time
exceeds 10 minutes during heating operation, as shown below, and
the outside air temperature and the outdoor unit heat exchanger tem­perature
the indoor unit fan stops. The defrost operation stops when the out­door unit heat exchanger temperature rises to about 15°C or higher or
the defrosting time exceeds 9 minutes.

1.8.

If a malfunction occurs, LED1 on the outdoor unit flashes in 0.2-sec­o

When reading the result of self-diagnosis, you shall combine it with indoor
unit indication in order to get a correct conclusion.

For details, please refer to the troubleshooting section.

meet certain conditions. When the defrost operation starts,

10 min or more 10 min or more 10 min or more

Start of
heating
operation

Defrosting
Max. 9min

Defrosting
Max. 9min

Self-diagnostic malfunction code display of Outdoor unit

nd intervals as shown below.

0 5

2 – 6

AE-X15PU

1.9. AUTOMATIC AIR CONDITIONING

In the AUTO mode, the unit will automatically select COOL or HEAT
mode by comparing the room temperature and your desired tempera­ture.
The unit will automatically switch between HEAT and COOL mode to
keep the desired temperature.
COANDA and MULTI SPACE button will be inactivated during AUTO
mode.

Modes and Temperature Settings

the figures in ( ) are temperature settings

During operation, if the outdoor temperature changes, the temperature
settings will automatically slide as shown in the chart.

2. Outline of PAM circuit

1.10. INACTIVATE 5°F(-15°C) AUTO STOP FUNCTION

During the heating operation, the unit will automatically stop when
the outdoor temperature drops below 5°F(-15°C) to prevent the
outdoor unit from the damage caused by the freezing of the drained
water. The unit will stop its operation for 4 hour and then resume
the operation when the outdoor temperature rises above 7°F(-13.9°C).

If the customer do not want to use this function, this function can be
inactivated by cutting JPA on outdoor PWB.

1. Power off.

2. Cut the JPA

cut JPA

2.1. PAM (Pulse Amplitude Modulation)

The PAM circuit varies the compressor drive voltage and controls the rotation speed of the compressor.
The IGBT shown in the block diagram charges the energy (electromotive force) generated by the reactor to the electrolytic capacitor for the inverter

by turning ON and OFF.

208 or
230V

When the IGBT is ON, an electric current flows to the IGBT via
the reactor (L1) and diode bridge (DB2).

When the IGBT turns OFF, the energy stored while the IGBT
was ON is charged to the voltage capacitor via the diode
bridge (DB1).

As such, by varying the ON/OFF duty of the IGBT, the output
voltage is varied.

2 – 7

AE-X15PU

2.2. High power factor control circuit

This circuit brings the operating current waveform closer to the waveform of commercial power supply voltage to maintain a high power factor.
Because of the capacitor input, when the PAM circuit is OFF, the phase of the current waveform deviates from the voltage waveform as shown below.
To prevent this deviation, a current is supplied during the periods indicated by "O" in the diagram.
To determine the length of period to supply a current, the zero-cross timing of the AC input voltage is input to the microcomputer via the clock circuit.
The power source frequency is also determined at the same time.
The IGBT turns ON after the time length determined by the zero-cross point to supply a current to the IGBT via the reactor.
This brings the current waveform closer to the voltage waveform in phase.
As descr bed above, the ON/OFF operation of the IGBT controls the increase/decrease of the compressor power supply voltage (DC voltage) to

improve the compressor efficiency and maintain a high power factor by keeping the current phase closer to that of the supply voltage.

2.2.1 Detailed explanation of PAM drive circuit sequence

60

about 9 mS

1300uS

0.004

1.7ms

2.2.2 AC clock (zero-cross) judgment

• The clock circuit determines the time from one rising point of the clock waveform to the next rising point.
The detected clock waveform is used to judge the power source frequency (60Hz).

• The zero-cross of the AC voltage is judged as the rising of the clock waveform, as shown in the diagram above.

2.2.3 IGBT ON start time (delay time B)

• Based on the zero-cross of the AC voltage, the IGBT turns ON after a delay time set according to the power source frequency.

2.2.4 IGBT ON time (C)

• After the above delay time, the IGBT turns ON to supply a current to the reactor.

• The ON time of the IGBT determines the amount of energy (level of DC voltage rise) supplied to the reactor.

DC voltage level in each operation mode (varies depending on external load conditions)
– Cooling operation --- 220 to 290 V

– Heating operation --- 260 to 290 V

2.3. PAM protection circuit

To prevent excessive voltage of PAM output from damaging the IPM and electrolytic capacitor as well as the control printed wiring board (PWB), this
circuit monitors the PAM output voltage and turns off the PAM control signal and PAM drive immediately when an abnormal voltage output is gener-

ted. At the same time, it shuts off the compressor operation.

a
The protection voltage level is as follows.

C9

C8

7

2 – 8

AE-X15PU

2.3.1 Details of troubleshooting procedure for PAM

1) PAM shutdown due to error

1) When the DC voltage detection circuit sends a signal exceeding the specified voltage to the microcomputer
DC voltage of 400 V or higher (detection circuit input voltage of about 4.6 V or higher) [IC1 69 pin]
– When an error is detected

• PAM IGBT turns OFF.

• Compressor turns OFF.

• All units shut down completely when the error occurs four times.

2) When the outdoor unit clock waveform differs from the specified value immediately before the PAM IGBT turns ON
When there is no clock waveform input
When a clock signal of other than specified power source frequency (60Hz) is input
– When an error is detected

• PAM IGBT does not turn ON.

• Compressor operates normally.

• Complete shutdown does not occur.

2) PAM error indication

In case of error “1)”
– An error signal is sent to the indoor unit as soon as an error is generated.

• Malfunction No. 14-0 is indicated when the error code is called out by the indoor unit's self-diagnosis function.

– The LED on the outdoor unit flashes 14 times when an error is generated.

• The LED continues flashing in the 14-time cycle even after the compressor stops ope

• The LED turns off (data is deleted from the memory) when the outdoor unit power is turned off.

In case of error “2)”
– An error signal is sent to the indoor unit as soon as an error is judged.

• Malfunction No. 14-1 is indicated when the error code is called out by the indoor unit's self-diagnosis function.

– The LED on the outdoor unit flashes 14 times when an error is judged.

• The LED on the outdoor unit flashes in normal pattern when the compressor stops operating.

(Compressor OFF or Thermostat OFF from remote control)

* When a user complains that the air conditioner does not provide sufficient cool air or warm air

In addition to conventional error-generating reasons, there is a possibility that the PAM IGBT does not turn ON even if the compressor is operating.
In that case, the DC voltage does not rise even though the compressor is operating, and lowers to the 180-VDC level.
– Check items

• Clock circuit check

• PAM IGBT check

rating.

2 – 9

AE-X15PU

3. Explanation of IPM drive circuit

The IPM for compressor drive is made by Mitsubishi Electric.
The power supply for the IPM drive, the shunt resistance for over current detection, etc., are provided outside the IPM (control PWB).

3.1. IPM drive power supply circuit

The power supply for the upper-phase IGBT (HU, HV, HW) drive employs a bootstrap system, and provides power to the upper-phase IC.
The 15-V power supply for the lower-phase IC is provided by the control printed wiring board (PWB).

3.1.1 Brief explanation of bootstrap system (single power drive system)

To supply power to the upper-phase IC, the microcomputer (IC1) turns ON the lower-phase IGBT (LU, LV, LW).
This results in a charging current that flows to the electrolytic capacitor of each upper-phase IC input and charges the bootstrap capacitor with a 15V

current.
The power supply for the subsequent stages is charged while the lower-phase IGBT is ON in ordinary compressor drive c

ontrol.

2 – 10

AE-X15PU

3.1.2 DC over current detection circuit

When a current of about 20 A or higher flows through the shunt resistance [AE-X15PU(R230～R234), AE-X18PU/AE-X24PU(R230～R235)] on the
control printed wiring board (PWB), the voltage at this resistance is input to IPM CIN pin (15). Then, the gate voltage of the lower-phase IGBT (LU,
LV, LW) inside the IPM turns OFF to cut off the over current. At the same time, an L output of more than 20μs is generated from IPM from pin (14),
and this results in an L input to over current detection input pin (17) of the microcomputer (IC1) and turns OFF the PWM signal output (IC1 pins (20)
through (25)) to the IGBT gate.

AE-X15PU(R230～R234),
AE-X18PU/AE-X24PU(R230～R235)

2 – 11

AE-X15PU

4. 180° energizing control

This is the control system to moderate the speed by the current phase difference for higher efficiency and lower noise of the compressor. The current
phase difference control is the control system paid attention to the interrelation between efficiency and phase gap generated by the applied voltage of
motor and current in the coil of motor as shown in the figure below.

This control is the forced magnetization system independent of the location of rotor, detecting the phase difference between driving voltage phase and
line current phase flowing in motor coil, and controls the modulation rate data to get the phase difference at the best efficiency.

2 – 12

AE-X15PU

CHAPTER 3. FUNCTION AND OPERATION OF PROTECTIVE PROCEDURES

[1] PROTECTION DEVICE FUNCTIONS AND OPERATIONS

* These models have following thermistors.

INDOOR UNIT

AE-X15PU, AE-X18PU, AE-X24PU

The errors for the thermistors that are not mentioned above are irrelevant.
These indoor units don’t have power relay.

Description Detection period Reset condition Indoor

1 Indoor unit fan lock Operation stops if there is no

Indoor unit fan rota­tion speed error

2 2-way valve freeze

prevention

3 Outdoor unit heat

exchanger over­heat shutdown

4 Compressor dis-

charge overheat
shutdown

5 Dehumidifying oper-

ation temporary
stop

6 DC over current

error

7 AC over current

error

8 AC over current

error in compressor
OFF status

9 AC maximum cur-

rent error

10 AC current defi-

ciency error

input of rotation pulse signal from
indoor unit fan motor for 1 minute.
Operation stops if rotation pulse
signal from indoor unit fan indi­cates abnormally low speed
(about 300 rpm or slower).

Compressor stops if temperature
of outdoor unit 2-way valve
remains below 0℃ for 10 continu­ous minutes during cooling or
dehumidifying operation.

Operation frequency lowers if out­door unit heat exchanger temper­ature exceeds about 55℃ during
cooling operation.
Compressor stop
heat exchanger temperature
exceeds about 55℃
onds at minimum frequency.

Operating frequency lowers if
temperature of compressor
chamber thermistor (TH1) falls
below about 110℃.
Compressor stops if temperature
of compressor chamber ther­mistor (TH1) remains at about
110℃ (for 120 seconds in cooling
operation, or 60 seconds in heat­ing operation) at minimum fre­quency.

Compressor stops if outside air
temperature thermistor is lower
than about 16℃ during dehumidi­fying operation.

Compressor stops if electric cur-

about 20 A or higher flows

rent of
in IPM.

Operating frequency lowers if
compressor AC current exceeds
peak control current value. Com­pressor stops if compressor AC
current exceeds peak control cur­rent value at minimum frequency.

Indoor and outdoor units stop if
AC current exceeds about 3 A
while compressor is in non-opera­tion status.

Compressor stops if compressor
AC current exceeds 17 A.

Compressor stops if operating
frequency is 50 Hz o
compressor AC current is about

2.0 A or lower.

s if outdoor unit

for 120 sec-

r higher and

When indoor unit fan
is in operation

When indoor unit fan
is in operation

When in cooling or
dehumidifying opera­tion

When in cooling or
dehumidifying opera­tion

When compressor is
in operation

When in dehumidify­ing operation

When compressor is
in operation

When compressor is
in operation

When compressor is
in non-operation

When compressor is
in operation

When compressor i
in operation

TH1, TH2, TH3, TH4, TH6

unit

error

display

Operation OFF or ON I2 Yes None

Operation OFF or ON I2 Yes None

Automatic reset when
temperature of 2-way
valve rises above
10℃ .

Automatic reset after
safety period (180
sec).

Automatic reset after
safety period (180
sec).

Automatic reset when
outside air tempera­ture rises above
16℃.
Operation OFF or ON YesI1 Yes

Operation OFF or ON YesI1 Yes Yes

Replacement of
defective parts such
as IPM

Operation OFF or ON Yes I1 Yes Yes

s

Operation OFF or ON Yes I1 Yes Yes

None Yes Yes

None Yes Yes

None Yes Yes

None Yes Yes

YesI2 Yes Yes

result display

Indoor

unit

Outdoor

Yes

sisongaid-fleSnoitarepOnoitcnuF

unit

3 – 1

AE-X15PU

F

Description Detection period Reset condition Indoor

11 Thermistor installa-

tion error or 4-way
valve error

12 Compressor high

temperature error

13 Outdoor unit heat

exchanger ther­mistor short-circuit
error

14 Outdoor unit outside

air temperature
thermistor short-cir­cuit error

15 Outdoor unit suction

thermistor short-cir­cuit error

16 Outdoor unit 2-way

valve thermistor
short-circuit error

17 Outdoor unit heat

exchanger ther­mistor open-circuit
error

18 Outdoor unit outside

air temperature
thermistor open-cir-

error

cuit

19 Outdoor unit suction

thermistor open-cir­cuit error

20 Outdoor unit 2-way

valve thermistor
open-circuit error

21 Outdoor unit dis-

charge thermistor
open-circuit error

22 Serial signal error Power relay turns OFF if indoor

23 Compressor star-

tup error

24 Compressor rota-

tion error (at 120°
energizing)

25 Outdoor unit DC fan

error

26 PAM over voltage

error

Compressor stops if high and low
values of temperatures detected
by outdoor unit heat exchanger
thermistor (TH2) and 2-way valve
thermistor (TH5) do not match
operating cycle.

Compressor stops if compressor
chamber thermistor (TH1)
exceeds about 114℃
is short-circuit in TH1.
Compressor stops if there is
short-circuit in outdoor unit heat
exchanger thermistor (TH2).

Compressor stops if there is
short-circuit in outdoor unit out­side air temperature thermistor
(TH3).

Compressor stops if there is
short-circuit in outdoor unit suc­tion thermistor (TH4).

Compressor stops if there is
short-circuit in outdoor unit 2-way
valve thermistor (TH5).
Compressor stops if there is
open-circuit in outdoor unit heat
exchanger thermistor (TH2).

Compressor stops if there is
open-circuit in outdoor unit out­side air temperature thermist
(TH3).

Compressor stops if there is
open-circuit in outdoor unit suc­tion thermistor (TH4).

Compressor stops if there is
open-circuit in outdoor unit 2-way
valve thermistor (TH5).
Compressor stops if there is
open-circuit in outdoor unit dis­charge thermistor (TH1).

unit cannot receive serial signal
from outdoor unit for

Compressor stops if outdoor unit
cannot receive serial signal from
indoor unit for 30 seconds.

Compressor stops if compressor
fails to start up.

Compressor stops if there is no
input of position detection signal
from compressor or input is
abnormal.

Operation stops if there is no
input of rotation pulse signal from
outdoor unit fan motor for 30 sec­onds.
Compressor stops if DC voltage is
350 V or higher.

, or if there

or

8 minutes.

result display

Indoor

unit

error

display

3 minutes after com­pressor startup

When in operation Operation OFF or ON YesI1 Yes Yes

At compressor star­tup

At compressor star­tup

At compressor star­tup

At compressor star­tup

At compressor star­tup

At compressor star­tup

At compressor star­tup

At compressor star­tup

ressor star-

At comp
tup

When in operation Operation OFF or ON

When in operation Reset after reception

At compressor star­tup

Compressor operat­ing at 120° energizing

When outdoor unit
fan is in operation

When in operation Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Opera

tion OFF or ON YesI1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON Yes I1 Yes Yes

Operation OFF or ON YesI1 Yes Yes

(Automatic reset
when less than 8 min­utes)

None None None

of serial signal

Operation OFF or ON Yes I3 Yes Yes

Operation OFF or ON Yes I3 Yes Yes

Operation OFF or ON Yes I1 Ye

unit

Yes None

s Yes

Outdoor

sisongaid-fleSnoitarepOnoitcnu

unit

3 – 2

Description Detection period Reset co

27 PAM clock error When power source frequency

28 Outdoor unit ther-

mal fuse error in the
Terminal board

I1—The outdoor unit restarts four times before the indoor unit error is displayed (complete shutdown).
I2—A single error judgment results in the display of the indoor unit error (complete shutdown).
I3—The outdoor unit restarts eight times before the indoor unit error is displayed (complete shutdown).

cannot be determined (at startup),
or when power source clock can­not be detected for 1 continuous
second (at startup).

Compressor stops if outdoor unit
cannot receive serial signal from
indoor unit for 30 seconds.

At compressor star­tup, when in opera­tion

When in operation Reset after reception

Compressor contin­ues operation with­out stopping.

of serial signal

[2] AIR CONDITIONER OPERATION IN THERMISTOR ERROR

* These models have following thermistors.

INDOOR UNIT

AE-X15PU, AE-X18PU, AE-X24PU

The errors for the thermistors that are not mentioned above are irrelevant.
These indoor units don’t have power relay.

TH1, TH2, TH3, TH4, TH6

ndition Indoor

unit

error

display

None Yes Yes

None None None

AE-X15PU

result display

Indoor

unit

sisongaid-fleSnoitarepOnoitcnuF

Outdoor

unit

3 – 3

AE-X15PU

1. Outdoor unit

Item Mode Control opera-

Compressor
chamber ther­mistor (TH1)

Heat exchanger
thermistor (TH2)

Outside air tem­perature ther­mistor (TH3)

Suction pipe ther­mistor (TH4)

2-way valve ther­mistor (TH5)

Cooling
Dehumidifying
Heating

Cooling
Dehumidifying

Heating Expansion valve

Auto Operation mode

Cooling
Dehumidifying

Heating Rating control

Cooling
Dehumidifying

Heating Expansion valve

Cooling
Dehumidifying

Heating Operation not

Expansion valve
control and com­pressor protection

Outdoor unit heat
exchanger over­heat prevention

control
Defrosting

judgment

Operation not
affected

Defrosting

Expansion valve
control

control

Expansion valve
control

affected

tion

When resis­tance is low

(temperature

judged higher

than actual)

Compressor
operates, but
room does not
become cool or
warm (expansion

valve is open).
Compressor
operates at low
speed or stops.

Defrosting opera­tion is not acti­vated as needed,
and frost accumu­lates on outdoor
unit (

expansion

valve is closed).

Cooling mode is

activated even if

room tempera-

ture is low.

Normal operation. Outdoor unit ther-

Defrosting opera­tion is activated
unnecessarily.

Compressor
operates, but
room does not
become cool
(expansion valve

open).

is

Compressor

operates, but

room does not

become warm

(expansion valve

is open).

Frost accumu-

lates on indoor

unit evaporator

and room does

not become cool

(expansion valve

is closed).
Normal operation. Outdoor unit ther-

Short-circuit When resis-

Compressor high
temperature error
indication.

Outdoor unit ther­mistor short-cir­cuit error
indication.
Outdoor unit ther­mistor short-cir­cuit error
indication.

Outdoor unit ther­mistor short-cir­cuit error
indication.

mistor short-cir­cuit error
indication.
Outdoor unit ther­mistor short-cir­cuit error
indication.

Outdoor unit ther­mistor short-cir­cuit error
indication.

Outdoor unit ther­mistor short-cir­cuit error
indication.

Outdoor unit ther­mistor short-cir­cuit error
indication.

mistor short-cir­cuit error
indication.

tance is high
(temperature
judged lower

than actual)

Layer short-cir­cuit or open-cir­cuit may result in
compressor in
normal operation.

Normal operation. Outdoor unit ther-

Defrosting opera­tion is activated
unnecessarily,
and room does
not become warm
(expansion valve
is open).
Heating mode is
activated even if
room tempera­ture is high.

Normal operation. Outdoor unit ther-

Defrosting opera­tion is not acti­vated, and frost
accumulates on
outdoor unit.
Frost accumu­lates on evapora

tor inlet section,
and room does
not become cool
(expansion valve
is closed).
Frost accumu­lates on expan­sion valve outlet
section, and room
does not become
warm (expansion
valve is closed).

Compressor
operates, but
room does not
become cool
(expansion valve
is open).

Normal operation. Outdoor unit ther-

Open-circuit

Outdoor unit ther­mistor open-cir­cuit error
indication.

mistor open-cir­cuit error
indication.
Outdoor unit ther­mistor open-cir­cuit error
indication.

Outdoor unit ther­mistor open-cir­cuit error
indication.

mistor open-cir­cuit error
indication.
Outdoor unit ther­mistor open-cir­cuit error
indication.

Outdoor unit ther-

-

mistor open-cir­cuit error
indication.

Outdoor unit ther­mistor open-cir­cuit error
indication.

Outdoor unit ther­mistor open-cir­cuit error
indication.

mistor open-cir­cuit error
indication.

3 – 4

[3] THERMISTOR TEMPERATURE CHARACTERISTICS

he

1. Outdoor unit thermistor temperature characteristics

To measure the resistance, first remove the connector from the board.

roloCrotsimrehT No. Connector

Compressor thermistor
Heat exchanger pipe thermistor
Outdoor temp. thermistor
Suction temp. thermistor

500K

TH1: compressor thermistor

400K
300K
200K

Resistance ( )

25ºC resistance
45 K

100K

0

-20 0 20 60 80 100 120
Temperature (ºC)

TH1
TH2
TH3
TH4

1 - 2
3 - 4
5 - 6
7 - 8

Connector
(CN8)

3.06K5.78K

4.17K 2 28K

1.72K

Red
Orange
Green
Black

1 8

Tester

AE-X15PU

TH2: Heat exchange thermistor
TH3: Outdoor temp. thermistor
TH4: Suction pipe thermistor

40K

0ºC resistance

30K

Resistance ( )

20K

14.5 K
25ºC resistance

4.431 K

10K

0

-20 0 20 60

40

Temperature (

Connector
CN8

TH2, TH3, TH4

º

C)

1 8

Tester

[4] HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY

1. Cooling in 40 Hz fixed mode

To operate the outdoor unit independently, short-circuit the sections indicated by arrows in the diagram below with an adapter, and apply rated VAC
between (L1) and (L2) on the terminal board of the outdoor unit. This allows the outdoor unit to be operated in cooling mode independently.

(Do not operate the outdoor unit in this condition for an extended period of time.)

Soldering Side

C8

L2

L3

these pads are connected and Power is applied to L1 and L2 on terminal board.

n the outdoor unit operate in "TEST COOL 40Hz" mode.

C9

3 – 5

AE-X15PU

[5] GENERAL TROUBLESHOOTING CHART

* These models have following thermistors.

INDOOR UNIT

AE-X15PU, AE-X18PU, AE-X24PU

The errors for the thermistors that are not mentioned above are irrelevant.
These indoor units don’t have power relay.

1. Indoor unit does not turn on

Main cause Inspection method Normal value/condition Remedy

Cracked PWB.
(Cracked pattern)

Open-circuit in FU1 (250 V, 2.5A). Check melting of FU1. There should be no open-circuit. Replace PWB.

Check visually. There should be no cracking in

2. Indoor unit fan does not operate

Main cause Inspection method Normal value/condition Remedy

Open-circuit in heat exchanger
thermistor (TH2) (in heating oper­ation)

Disconnected heat exchanger
thermistor (TH2) (in heating oper­ation)

Measure thermistor resistance
(dismount for check)

Inspect connector on PWB.
Check thermistor ins
dition.

tallation con-

TH1, TH2, TH3, TH4, TH6

PWB or pattern.

Refer to THERMISTOR TEPER­ATURE CHARACTERISTICS-1
There should be no open-circuit
or faulty contact.
Thermistor should not be discon­nected.

Replace PWB.

Replace thermistor.

Replace thermistor.

Install correctly.

3. Indoor unit fan speed does not change

Main cause Inspection method Normal value/condi

Remote control not designed to
allow fan speed change.

Check operation mode. Fan speed should change except

during dehumidifying operation,
ventilation, light dehumidifying
operation, internally normal oper­ation

tion Remedy

4. Remote control signal is not received

Main cause Inspection method Normal value/condition Remedy

Batteries at end of service life. Measure battery voltage. 2.5 V or higher (two batteries in

series connection)

Batteries installed incorrectly. Check battery direction. As indicated on battery compart-

ment.
Lighting fixture is too close, or flu­orescent lamp is burning out.
Use Sevick light (Hitachi). Check if Sevick light (Hitachi) is

Operating position/angle is inap­propriate.

Open-circuit or short-circuit in wir­ing of light receiving section.

Defective light receiving unit. Check signal receiving circuit

w condensation on light receiv-

De

.

ing unit

Turn off light and check. Signal should be received when

light is turned off.

Signal may not be received

used.

Operate within range specified in
manual.

Check if wires of light receiving
section are caught.

(measure voltage between termi­nals 9 and 10 of connector CN7).
Check for water and rust. Signal should be received within

sometimes due to effect of Sevick

light.

Signal should be received within

range specified in manual.

Wires of light receiving section

should not have any damage

caused by pinching.

Tester indicator should move

when signal is received.

range specified in manual.

Explain to user.

Install new batteries.

Install batteries in indicated direc­tion.
Change light position or install
new fluorescent lamp.
Replace light or change position.

Explain appropriate handling to
user.

Replace wires of light receiving
section.

Replace PWB.

Take moisture-proof measure for
lead wire outlet of light receiving
section.

3 – 6

5. Louvers do not move

Main cause Inspection method Normal value/condition Remedy

Caught in sliding section. Operate to see if louvers are

caught in place.

Disconnected connector Inspect connectors. Connectors or pins should not be

Contact of solder on PWB
(connector section on PWB)

Check visually. There should not be solder con-

Louvers should operate smoothly. Remove or correct catching sec-

disconnected.

tact.

6. There is noise in TV/radio

Main cause Inspection method Normal value/condition Remedy

Grounding wires not connected
properly.
TV/radio is placed too close to
outdoor unit.
Other than above. Check for radio wave interfer-

Check grounding wire connec­tions.
Check distance between TV/radio
and outdoor unit.

ence.

Grounding wires should be con­nected properly.
If TV/radio is placed too close, it
may become affected by noise.

7. Malfunction occurs

AE-X15PU

tion.
Install correctly.

Correct contacting section.

Connect grounding wires prop­erly.
Move TV/radio away from outdoor
unit.

Main cause Inspection metho

Malfunction caused by noise. Che

ence.

ck for radio wave interfer-

d Normal value/condition Remedy

8. Compressor does not start

Main cause Inspection method Normal value/condition Remedy

Erroneous inter-unit connection. Check wiring between indoor and

outdoor units.

Dried-up electrolytic capacitor. Check electrolyt le ecalpeR.roticapac ci ectrolytic capacitor.
Blown outdoor unit fuse. Check 20-A fuse. Fuse should not be blown. Replace fuse/diode bridge.

Power supply voltage is too low. Measure power supply voltage

during startup.

Compressor lock. Supply current and touch com-

pressor cover (sound absorbing
material) to check if operation
starts.

Terminal board 1-N: 230 VAC, 60
Hz
Terminal board 2: serial signal

230±10 VAC, 60 Hz Make sure that power supply volt-

Compressor should start nor­mally.

Correct wiring.

.MPI ecalpeR.ytiunitnoc MPI kcehC.MPI degamaD

Replace fuse.
Replace outdoor unit PWB
assembly.

age is 180 V or higher.
Apply external impact to com-

pressor.
Replace compressor.

9. Operation stops after a few minutes and restarts, and this process repeats

Main cause Inspection method Normal value/condition Remedy

Dried-up electrolytic capacitor. Measure 290-VDC line voltage. 250 V or higher. Replace electrolytic capacitor.
Layer short-circuit in expansion
valve coil.

CAUTION:If fuse FU1/FU5 (outdoor unit control circuit board) is blown, be careful of charging voltage in inverter electrolytic capacitor C8, C9.

To discharge stored electricity, unplug the power cord and connect the plug of a soldering iron (230VAC, 30W) between the positive and
negative terminals of inverter electrolytic capacitor C8, C9.

Measure resistance. 46±3Ω in each phase (at 20℃

) Replace coil.

3 – 7

AE-X15PU

[6] MALFUNCTION (PARTS) CHECK METHOD

1. Procedure for determining defective outdoor unit IPM/compressor

The following flow chart shows a procedure for locating the cause of a malfunction when the compressor does not start up and a DC overcurrent indi­cation error occurs.

208/

L1 L2

2. Diode bridge check method

Turn off the power and let the inverter electrolytic capacitor (C8, C9) discharge completely. Then use a tester and check continuity.
When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed.

3. Inverter electrolytic capacitor (C8, C9) check method

Turn off the power, let the inverter electrolytic capacitor (C8, C9) discharge completely, and remove the capacitor from the control printed circuit board
(PWB). First, check the case for cracks, deformation and other damages. Then, using a needle-type tester, check co

Determination of normal condition

The tester needle should move on the scale and slowly returns to the original position. The tester needle should move
in the same way when polarities are reversed. (When measurement is taken with the polarities reversed, the tester
needle exceeds the scale range. Therefore, let the capacitor discharge before measurement.)

ntinuity.

3 – 8

AE-X15PU

4. IPM check method

Turn off the power, let the large capacity electrolytic capacitor (C8, C9) discharge completely, and dismount the IPM. Then, using a tester, check leak
current between C and E.

When using a digital tester, the (+) and (-) tester lead wires in the table must be reversed.

Needle-type tester Normal resistance value

(-) (+)

P N

U
V
W

Needle-type tester Normal resistance value

(-) (+)

U N ∞
V
W

Values in ( ) are for digital tester.

∞

(several MΩ)

(several MΩ)

[7] OUTDOOR UNIT CHECK METHOD

After repairing the outdoor unit, conduct the following inspection procedures to make sure that it has been repaired completely. Then, operate the
compressor for a final operation check.

1. Checking procedures

No

.

1 Preparation Disconnect compressor cords (white,

orange, red: 3 wires) from compres­sor terminals, and connect simulated
load (lamp used as load).
Operate air conditioner in cooling or
heating test operation mode.

2 Inverter DC power supply

voltage check

3 IPM circuit check Check that 3 lamps (load) light.

4 Compressor check Measure compressor coil resistance

5 Expansion valve check Measure expansion valve coil resis-

6 Final check Turn off power, and connect compres-

Measure DC voltage between IPM
pins (20) and (24).

Check position detection voltage (+15
V, 5 V) on control PWB.

(fo

r each phase of U, V and W).
Use multi-meter o
ble of displaying two digits right of the
decimal point (0.01Ω).

tance.

sor cords to compressor.
Operate air conditioner.
Measure DC voltage between IPM
pins (20) and (24).

r digital tester capa-

ydemeRnoitidnoc/eulav lamroNdohtem kcehCmetI

.BWP lortnoc ecalpeRCDV 023
Replace diode bridge.
Correct soldered section of Fas­ten tabs (BT1, BT2, BT5,BT6) on
control PWB and IPM (S, C, R).
(Repair solder cracks.)

Each voltage should be normal.
All 3 lamps (load) should light with
same intensity.
Resistance value at 20℃ --- 0.65Ω Correct connections at compres-

Each phase 46±3Ω (at 20℃） Replace expansion valve.

Compressor should operate nor­mally.
200 VDC or higher.

Replace control PWB.

sor terminals.
Replace compressor.

Replace control PWB.
Replace outdoor unit thermistor.
Replace compressor (in case of
compressor lock).

3 – 9

AE-X15PU

2. Troubleshooting of outdoor unit electric components

2

3

3

3 – 10

AE-X15PU

3. Caution in checking printed wiring boards (PWB)

3.1. Non-insulated control circuit

The GND terminals of the low-voltage circuits (control circuits for microcomputer and thermistors and drive circuits for expansion valve and relays) on
the control printed wiring board (PWB) are connected to the compressor drive power supply (320-VDC negative terminal). Therefore, exercise utmost
caution to prevent electric shock.

If a measuring instrument used for the test is grounded, its chassis (ground) has the same electric potential as the 0-V probe. Since non-insulated cir­cuits have the following voltage potential difference from the ground, connection of the grounding wire results in a short-circuit between the 0-V line
and the ground, thus allowing an excessive current t

the sheaths of the thermistor lead wires or expansion valve lead wires inside the outdoor unit become damaged due to pinching by the front panel

If
or other metal parts or contacting a pipe, a high voltage can flow and destroy the circuits. To prevent these problems, carefully conduct assembly
work.

L1

208/230V

L2

o flow to the tester to cause damage.

3 – 11

AE-X15PU

[8] TROUBLESHOOTING GUIDE

1. Self-Diagnosis Function

1.1. Indoor unit

• To display the self-diagnosis, hold down the AUX button for over 5 seconds on the indoor unit when the indoor unit is not operating.

• The operation lamp (green), timer lamp (orange) and Plasmacluster lamp (blue) flash to indicate the information of malfunction.

• If the power cord is unplugged or the circuit breaker is turned off, the self-diagnosis memory is lost.

AUX

Plasmacluster lamp(Blue)

Operation lamp(Green)

Timer lamp(orange)

<Display of self-diagnosis result>

The operation lamp (green) and the Plasmacluster lamp (blue) flash in synchronization with the timer lamp (orange).
Timer lamp (1 cycle)

1st 2nd 3rd 4th 5th

1-second

ON

1-second

ON

1-second

ON

1-second

ON

1-second

ON

ON
OFF

1-second

OFF

1-second

OFF

1-second

OFF

1.2. Outdoor unit

• The self-diagnosis is indicated the error information by flashing LED1 on the outdoor unit.

• The self-diagnosis of outdoor unit is displayed for sbout 3-10 minutes.Then ,the LED1 returns to normal display.

1-second

OFF

5-second OFF

3 – 12

[9] CHART

<INDOOR UNIT> ○:1-second ON / 1-second OFF

AE-X15PU

Problem

symptom

Normal
condition

Indoor and
outdoor units
do not oper­ate.

Indoor and
outdoor units
do not
operate.

Outdoor

unit

indication

(LED1)

Normal

blinking

1-time

2-time

Indoor unit

→

O O O O O Timer (Orange)

O O O O O Timer (Orange)

O Operation (Green)

O O O O O Timer (Orange)

O Operation (Green)
O Plasmacluster (Blue)

O O O O O Timer (Orange)

O Operation (Green)

O Plasmacluster (Blue)

O O O O O Timer (Orange)

O Operation (Green)

O O Plasmacluster (Blue)

O O O O O Timer (Orange)

O Operation (Green)

Lamp Main Sub Main Sub

Operation (Green)
Plasmacluster (Blue)

Plasmacluster (Blue)

Plasmacluster (Blue)

Malfunction

No.*

0 0 Normal

1 0 Outdoor unit

1 Outdoor temperature

2 Suction hermistor

3 Suction hermistor

2 0 Cycle

Content of diagnosis Check point Action

thermistor
short-circuit

temperature

Heat exchanger
thermistor short
circuit error

thermistor short
circuit error

short circuit error

(for unit A, B, C)
short circuit error

Compressor high
temperature error

1) Measure the resistance
of the outdoor unit
thermistors.

2) Check the lead wire
of the outdoor unit
thermistor for torn
sheath and shortcircuit.

3) 1) 2):Normal

1) Check the outdoor unit
air outlet for blockage.

2) Check if the power
supply voltage is AC
230V at full power.

3) Check the pipe
connections for
refrigerant leaks.

4) Measure resistance
of the outdoor unit
compressor thermistor.

5) Check the expansion
valve for proper
opera ion.

1) Replace the outdoor
unit thermistor
assembly.

2) Replace the outdoor
unit thermistor
assembly.

3) Replace the outdoor
unit control PCB
assembly.

1) Ensure unobstructed
outdoor unit air

ou let.

2) Connect power
supply of proper
voltage.

amount of refriger­ant.

4) Replace he outdoor
unit compressor
thermistor assem­bly.

5) Replace he expan­sion valve coil,
expansion valve or
outdoor unit control
PCB assembly.

Indoor unit
operates.
Outdoor
unit does
not operate
temporarily

Indoor and
outdoor
units do not
operate.

Indoor unit
operates.
Outdoor
unit does
not operate
temporarily.

3-time

O O O O O Timer (Orange) 1 Compressor

O Operation (Green)

O Plasmacluster (Blue)

O O O O O Timer (Orange) 2 Outdoor unit heat

O Operation (Green)
O Plasmacluster (Blue)

O O O O O Timer (Orange) 3 Indoor unit heat

O Operation (Green)
O O Plasmacluster (Blue)

O O O O O Timer (Orange) 4 IPM high

O Operation (Green)

O Plasmacluster (Blue)

O O O O O

O O O O O

Timer (Orange) 5 IPM high

O Operation (Green)

O O Plasmacluster (Blue)

Timer (Orange)
Operation (Green)

O O

Plasmacluster (Blue)

3 0

Dry opera­tion

Heat
operation

3 – 13

discharge overheat.

exchanger overheat.

exchanger overheat.

temperature error

temperature error

Temporary stop
due to dehumidi­fying opera ion

5℉/-15℃
AUTO OFF

(Temporary stop for cycle
protection)

(Temporary stop for cycle
protection)

(Temporary stop for cycle
protection)

Measure resistance of the
heat-sink hermistor.

Replace the outdoor unit
control PCB assembly.

(Temporary stop for
cycle protection)

Measure the resistance
of outdoor temperature
thermister.

-

-

-

-

-

-

Replace the indoor
unit thermister ass­embly.

AE-X15PU

Problem

symptom

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

)

)

)

)

)

)

)

)

)

)

)

)

)

Malfunction

No.*

Content of diagnosis Check point Action

thermistor
open-circuit

DC Current

AC Current

wire check

Outdoor

unit

indication

(LED1)

5-time O O O O O Timer (Orange) 5 0 Outdoor unit

O O O O O Timer (Orange) 1 Outdoor temperature

O O O O O Timer (Orange) 2 Suction thermistor

O O O O O Timer (Orange) 3 Suction thermistor

O O O O O Timer (Orange) 4 Discharge thermistor

O O O O O Timer (Orange) 5 Heat sink thermistor

6-time O O O O O Timer (Orange) 6 0 Outdoor unit

O O O O O Timer (Orange) 1 IPM pin level error Check the IPM is attached

7-time O O O O O Timer (Orange) 7 0 Outdoor unit

O O O O O Timer (Orange) 1 AC current error

O O O O O Timer (Orange) 2 AC maximum current

O O O O O Timer (Orange) 3 AC current

8-time O O O O O Timer (Orange) 8 0 Abnormal

Indoor unit

→

O O Operation (

O O Operation (

O Plasmacluster (Blue)

O O Operation (

O Plasmacluster (Blue)

O O Operation (

O O Plasmacluster (Blue)

O O Operation (
O Plasmacluster (Blue)

O O Operation (
O O Plasmacluster (Blue)

O O Operation (

O O Operation (

O Plasmacluster (Blue)

O O O Operation (

O O O Operation (

O Plasmacluster (Blue)

O O O Operation (

O Plasmacluster (Blue)

O O O Operation (

O O Plasmacluster (Blue)

O Operation (

Lamp Main Sub Main Sub

Green

Plasmacluster (Blue)

Green

Green

Green

Green

Green

Green

Plasmacluster (Blue)

Green

Green

Plasmacluster (Blue)

Green

Green

Green

Green

Plasmacluster (Blue)

Heat exchanger
thermistor open
circuit error

thermistor open
circuit error

open circuit error

open circuit error

open circuit error

open circuit error

DC over current
error

AC over current error 1) Ensure unobstructed air

when OFF

error

Abnormal wire check
error

1) Check connector of
outdoor unit thermistor
for secure installa ion.

2) Measure resistance of
outdoor hermistors

3) Check the lead wires
of hermistors on the
outdoor unit control
PCB for open-circuit.

4) 1) 2) 3):Normal

Go to “DC Over Current Error (6-0 error)”.

correctly to the outdoor unit
IPM PWB.

unit air outlet.

2) Check the outdoor unit
fan motor.

1) IPM con inuity check 1) Replace the outdoor

1) Ensure unobstructed air
unit air outlet.

2) Check the outdoor unit
fan motor.

1) Replace the outdoor unit
control PCB assembly.

amount of refrigerant.

3) Correct refrigerant clogs.
(Stop valve, pipe,
expansion valve)

1) Check the expansion
valve.

2) Are four expansion
valves connected by
mistake.

3) Check the wiring
between units.

1) Correct the installa­ion

2) Replace the outdoor

unit thermistor
assembly.

3) Replace the outdoor

unit thermistor
assembly.

4) Replace the outdoor

unit control PWB
assembly.

Replace the outdoor
unit IPM PWB
assembly.

1) Ensure unobstructed

outdoor unit air
outlet.

2) Check the outdoor

unit fan motor.

IPM PWB

1) Ensure unobstructed

outdoor unit air
outlet.

2) Check the outdoor

unit fan motor.

1) Replace the outdoor

unit control PCB
assembly.

amount of refriger­ant.

3) Correct refrigerant

clogs. (Stop valve,
pipe, expansion
valve)

1) Replace the outdoor

control board
assembly.

2) Reattach

3) Check the wiring

between units.

3 – 14

AE-X15PU

Problem

symptom

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

Outdoor

unit

Indoor unit

Malfunction

No.*

Content of diagnosis Check point Action

indication

(LED1)

Lamp Main Sub Main Sub

0

Green

9

)

Cycle
temperature

9- ime

→

O O O O OOTimer (Orange)

O Operation (

Plasmacluster (Blue)

O O O O O Timer (Orange)

O O Operation (

Green

)

4 Cycle

temperature

O Plasmacluster (Blue)

10-time O O O O O Timer (Orange) 10 0 EEPROM

O O Operation (Green)

error

Plasmacluster (Blue)

O O O O O Timer (Orange) 1 EEPROM (outdoor)

O O Operation (Green)

O Plasmacluster (Blue)

O O O O O Timer (Orange) 10 2 EEPROM

O O Operation (Green)

error

O Plasmacluster (Blue)

11-time O O O O O Timer (Orange) 11 0 Outdoor unit

DC fan

O O O Operation (Green)

Plasmacluster (Blue)

Thermistor
installation error
or 4-way valve
error.

4 way valve error or
Gas leak error

EEPROM (outdoor)
data error

data error

EEPROM (outdoor)
data error

Outdoor unit DC fan
rotation error

1)Check the ther­mistor (heat
exchanger) and (2­way valve) are
installed in correct
positions.

2)Check resistance of

hermistors (heat
exchanger and 2­way valve).

3)Check the 4-way
valve for proper
operation.

4)No abnormality
found in above
inspections (1), (2),
(3).

1) Check the unit thermistor
TH2 (exchange) and
TH3 (pipe temperature)
are installed in correct
portions.

2) Check if the refrigerant
volume is abnormally
low.

1)Correct the instal­la ion.

2)Change he
specified amount
of refrigerant.

3)Replace the 4­way valve.

4)Replace the out­door unit control
PWB assembly.

1) Correct the
installation.

2) Change the
refrigerant.

3) Replace the 4-way
valve.

3) Check the 4-way valve
for proper operation.

-

Replace the outdoor
unit control PWB
assembly.

- Replace the outdoor

unit control PWB
assembly.

1) Check connector CN3
of the outdoor unit DC
fan motor for secure
installation.

2) Check the outdoor unit
fan motor for proper
rotation.

3) Check fuse FUSE5.

4) Outdoor unit control
PWB

1) Correct the installa­tion.

2) Replace the outdoor
unit fan motor.

3) Replace the outdoor
unit control PWB
assembly.

4) Replace the outdoor
unit control PWB
assembly.

O O O O O Timer (Orange) 1 Outdoor unit DC fan

O O O Operation (Green)

O Plasmacluster (Blue)

O O O O O Timer (Orange) 2 Outdoor unit DC fan

O O O Operation (Green)

O Plasmacluster (Blue)

O O O O O Timer (Orange) 3 Detection error of DC

O O O Operation (Green)

O O Plasmacluster (Blue)

O O O O O Timer (Orange) 4 Detection error of

O O O Operation (Green)

O Plasmacluster (Blue)

O O O O O Timer (Orange) 5 Outdoor unit DC fan

O O O Operation (Green)

O O Plasmacluster (Blue)

3 – 15

driver IC error

lock error

fan nega ive rotation
before compressor is
driven

inverter current for
DC fan

open connector error

1) Check if the fan IPM
terminal resistance
values are uniform.

2) Outdoor unit fan motor
continuity check.

1) Check the outdoor unit
fan motor for proper
rotation.

2) 1): Normal

1) Replace the outdoor
unit control PWB
assembly.

2) Replace the outdoor
unit fan.

1) Replace the outdoor
unit control PWB
assembly.

2) Replace the outdoor
unit fan.

(Temporary stop for DC

-

fan circuit protection)

- Replace the outdoor
unit control PWB
assembly.

1) Check connector CN3

of the outdoor unit DC
fan motor for secure
installation.

2) No abnormality found in

above inspection 1).

1) Correct the installa-

tion.

2) Replace the outdoor

unit control PWB
assembly.

AE-X15PU

Problem

symptom

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor units
operate.

Outdoor

unit

indication

(LED1)

12- ime O O O O O Timer (Orange) 12 0 Thermal fuse

O O Operation (Green)

13- ime O O O O O Timer (Orange) 13 0 DC

O O O Operation (Green)

O O O O O Timer (Orange) 1 Compressor rota ion

O O O Operation (Green)

O O O O O Timer (Orange) 2 Compressor rota ion

O O O Operation (Green)

O O O O O Timer (Orange) 3 Detection error of

O O O Operation (Green)

Indoor unit

→

O Plasmacluster (Blue)

O Plasmacluster (Blue)

O O Plasmacluster (Blue)

Lamp Main Sub Main Sub

Plasmacluster (Blue)

Plasmacluster (Blue)

Malfunction

No.*

Content of diagnosis Check point Action

in terminal
board

compressor

Thermal fuse error
in terminal board (for
power supply)

Compressor startup
error

error.
(at 120° energizing)

error
(at 180° energizing)

inverter current

1) Check he thermal fuse
in terminal board (for
Power supply)

2) Check connector CN5 of
the outdoor unit.

3) 1) 2): Normal

1) Check he colors (red,
white, orange) of the
compressor cords for
proper connection.

(PWB side, compressor

side)

2) Check if he IPM terminal
resistance values are
uniform.

3) Check if outdoor main
relay (MRY1) turns on
and voltage of both end
of the condenser (C8

or C9) has become
DC290-330V.

4) 1) 2) 3) : Normal

Check the circuit of
detection of inverter
current.

1) Replace terminal
board for Power
supply.

2) Correct he installa­tion.

3) Replace the outdoor
unit control PCB
assembly.

1) Correct the installa­tion.

(U: Red, V: White, W:

Orange)

2) Replace the outdoor
unit control PWB
assembly.

3) Replace the outdoor
unit control PWB
assembly.

4) Replace the com­pressor.

Replace the outdoor
unit control PWB
assembly.

Indoor and
outdoor
units do not
operate.

Indoor unit
operates.
Outdoor unit
does not
operate.

Indoor unit
operates.
Outdoor unit
does not
operate.

Indoor and
outdoor
units do not
operate.

14- ime O O O O O Timer (Orange) 14

Lighting or
OFF

Lighting or
OFF

O O O Operation (

Plasmacluster (Blue)

O O O O O Timer (Orange)

O O O Operation (

O Plasmacluster (Blue)

O O O O O Timer (Orange)

O O O Operation (

O Plasmacluster (Blue)

O O O O O Timer (Orange) 17
O O Operation (

Plasmacluster (Blue)

O O O O O Timer (Orange) 18
O O Operation (

Plasmacluster (Blue)

O O O O O Timer (Orange)
O O Operation (

O Plasmacluster (Blue)

Green

Green

Green

Green

Green

Green

)

)

)

)

)

)

0 Outdor unit

PAM

1 PAM clock error Check the PAM clock for

2 PAM under voltage

0 Wiring

between
units

0 Wiring

between
units

1 Check the wiring between

PAM over voltage
error

error

Serial opencircuit 1) Check he wires between

Serial opencircuit Check the wiring between

1) Check the AC power
supply voltage for

2) No abnormality found in
above inspection.

proper input.

1) Check the AC power
supply voltage for

2) No abnormality found in
above inspection.

units.

2) Check voltage between
N and 1 the indoor/
outdoor unit terminal
boards.

3) Check the outdoor unit
fuse.

4) Check 15-V,12-V and
5-V voltages on the
PCB.

Check resistance between

IPM terminals.

5) Check pins No 3 and 5
of connector CN3 of he
outdoor unit fan motor
for shortcircuit.

6) Outdoor unit control
PCB.

units.

units.

1) Correct he installa­tion.

2) Replace the PWB
assembly.

Replace the outdoor
unit control PWB
assembly.

1) Correct he installa­tion.

2) Replace the PWB
assembly.

1) Connect stable
power supply.

Correct the wiring.

2) Replace the outdoor
unit control PWB
assembly.

3) Replace the fuse/
outdoor unit control
PWB assembly.

4) Replace the outdoor
unit control PWB
assembly.

5) Replace the outdoor
unit fan motor.

6) Replace the outdoor
unit control PWB.

Correct the wiring.

Correct the wiring.

3 – 16

AE-X15PU

Problem

symptom

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units do not
operate.

Indoor and
outdoor
units oper­ate.

Outdoor

unit

indication

(LED1)

Normal
blinking or
OFF

Normal
blinking or
OFF

Normal
blinking
or OFF

)

)

Malfunction

No.*

0 Indoor unit

1

26

2

3 Indoor unit

Content of diagnosis Check point Action

fan

control PCB

Indoor unit
room tem­perature
thermistor

Indoor unit
pipe tem­perature
thermistor

valve tem­perature
thermistor

Indoor unit

→

O O O O O Timer (Orange) 19
O O O Operation (

O O O O O Timer (Orange) 20 0 Indoor unit
O O Operation (

    
  



    
  



    
  

 

Lamp Main Sub Main Sub

Green

Plasmacluster (Blue)

Green

Plasmacluster (Blue)

Timer (Orange)
Operation (Green)
Plasmacluster(Blue)

Timer (Orange)
Operation (Green)
Plasmacluster(Blue)

Timer (Orange)
Operation (Green)
Plasmacluster(Blue)

Indoor unit fan error 1) Check the indoor fan

EEPROM data error (EEPROM read data error) Replace the indoor unit

Indoor unit room
temperature
thermistor

Indoor unit pipe
temperature
thermistor

Indoor unit valve
temperature
thermistor

motor for proper rotat­ing operation.

(Check fan lock.)

2) Check the lead wire of
the indoor fan motor for
open-circuit.

3) Check connector ofthe
indoor unit fanmotor for
secureinstallation.

4) 1) 2) 3): Normal

(1)Check connector of

thermistor for
secure installation.

(2)Check the tempera-

ture properties of
the thermistor.

(1)Check connector of

thermistor for
secure installation.

(2)Check the tempera-

ture properties of
the thermistor.

(1)Check connector of

thermistor for
secure installation.

(2)Check the tempera-

ture properties of
the thermistor.

1) Replace the indoor
fan motor.

2) Replace the indoor
fan motor.

3) Correct the installa­tion of the indoor
fan motor connec­tor.

4) Replace the indoo­runit control PCB.

control PWB.

(1)Replace the ther-

mistor.

(2)Replace the ther-

mistor.

(1)Replace the ther-

mistor.

(2)Replace the ther-

mistor.

(1)Replace the ther-

mistor.

(2)Replace the ther-

mistor.

*Remark

The malfunction No. is calculated using the following way.
Example)

Lamp Calculation Main Sub

Indoor unit lamp

Timer (orange) O O O O O
Operation (Green) O O 4+1=5 5
Plasmacluster (blue) O 2 2

→

16 8 4 2 1

3 – 17

AHXP13MY

CHAPTER 4. REFRIGERATION CYCLE

The content of this section is currently under revision.
Will be released after approval.

[1] SCHEMATIC DIAGRAM

AE-X15PU

Service Manual

Indoorunit

Flare coupling Flare coupling

3-way
valve

Outdoor unit

silencer

Compressor

(4)

Reverse valve

Evaporator

(1)

Condenser

s

(3)

2-way
valve

Strainer

Expansion
valve

Strainer

S

S

(2)

[2] STANDARD CONDITION

Temperature of each part and presure of 3-way valve are acquired in standard condition, and would change with condition
around. The standard condition is as follows:

edis

roodtuOedis roodnI

Dry-bulb Temp.

Cooling 80 (26.7) 51.1 95（35.0）

℉(℃) Relative Humidity (%) Dry-bulb Temp. ( ℃) Relative Humidity (%)

ー

47（8.33）ー

7370 (21.1)Heating

* R

EFRIGERANT PIPE LENGTH 25feet (7.6m).

[3] PEAK OPERATION CURRENT

PEAK CURRENT

Cooling Heating

AE-X15PU 7.6 A 9.5 A
AE-X18PU

AE-X24PU

7.7 A

11.8 A

10.3A

12.0A

[4] TEMPERATURE AT EACH PART AND PRESSURE IN 3-WAY VALVE

(AY-XPC15PU / AE-X15PU)

MODE

Hz

No.

Temp. on (1) ℉(℃) 165.2 (74) 194.5 (90.3)

Temp. on (2)

Temp. on (3)

Temp. on (4)

℉(℃) 101.5 (38.6) 40.3 (4.6)

℉(℃) 49.6 (9.8) 124.7 (51.5)

℉(℃) 57.6 (14.2) 39.7 (4.3)

3-way valve pressure (MPaG)

COOLING

MAX

62 OR MORE 80 OR MORE 42 FIXED 42 FIXED

0.919 3.318

HEATING

MAX

COOLING

TEST RUN

HEATING

TEST RUN

147.6 (64.2) 140.0 (60.0)

101.1 (38.4) 39.2 (4.0)

55.2 (12.9) 99.0 (37.2)

60.4 (15.8)

41.5 (5.3)

1.041 2.265

CAUTION: Indoor fan speed is set to [HIGH].

4 – 1

AE-X15PU

The content of this page is currently under revision.
Will be released after approval.

(AY-XPC18PU / AE-X18PU)

(AY-XPC18PU / AE-X18PU)

MODE

MODE

Hz

Hz

No.

No.

Temp. on ① (℃) 70.1 94.5

Temp. on (1) ℉(℃)

Temp. on ② (℃) 38.7 5.1

Temp. on (2) ℉(℃)

Temp. on ③ (℃) 9.8 55.3

Temp. on (3) ℉(℃)

Temp. on ④ (℃) 9.9 3.6

Temp. on (4) ℉(℃)

Temp. on ⑤ (℃)

3-way valve pressure (MPaG)

3-way valve pressure (MPaG)

CAUTION: Indoor fan speed is set to [HIGH].

(AY-XP24PU / AE-X24PU)

MODE

MODE

Hz

Hz

No.

No.

Temp. on ① (℃) 70.1 94.5

Temp. on (1) ℉(℃)

Temp. on ② (℃) 38.7 5.1

Temp. on (2) ℉(℃)

Temp. on ③ (℃) 9.8 55.3

Temp. on (3) ℉(℃)

Temp. on ④ (℃) 9.9 3.6

Temp. on (4) ℉(℃)

Temp. on ⑤ (℃)

3-way valve pressure (MPaG)

3-way valve pressure (MPaG)

CAUTION: Indoor fan speed is set to [HIGH].

COOLING

COOLING

MAX

MAX

65 OR MORE 88 OR MORE 42 FIXED 42 FIXED

73

OR MORE 88 OR MORE 42 FIXED 42 FIXED

HEATING

HEATING

MAX

MAX

COOLING TEST

COOLING

RUN MODE

TEST RUN

HEATING TEST

HEATING

RUN MODE

TEST RUN

158.9 (70.5) 198.0 (92.2) 138.9 (59.4) 13.4. (56.9)

101.1 (38.4)

49.6 (9.8)

50.9 (10.5)

42.4 (5.8) 102.9 (39.4) 38.3 (3.5)

94.6 (34.8) 55.9 (13.3)

78.1 (25.6)

37.0 (2.8) 58.2 (14.6) 41.5 (5.3)

0.876 3.449 1.056 2.116

COOLING

COOLING

MAX

MAX

65 OR MORE 88 OR MORE 42 FIXED 42 FIXED

105 OR MORE 97 OR MORE 42 FIXED 42 FIXED

165.0 (73.9)

HEATING

HEATING

MAX

MAX

COOLING TEST

COOLING

RUN MODE

TEST RUN

HEATING TEST

HEATING

RUN MODE

TEST RUN

169.5 (76.4) 137.5 (58.6) 125.8 (52.1)

113.2 (45.1) 45.5 (7.5) 103.3 (39.6) 41.0 (5.0)

50.4 (10.2)

41.4 (5.2)

0.770

107.4 (41.9)

35.2 (1.2)

2.874 1.073

58.5 (14.7) 94.6 (34.8)

60.6 (15.9)

39.0 (3.9)

2.170

“Hz” in the table above is converted by frequency, and has nothing to do with power supply frequency.
Note: For COOLING/HEATING max, please set the temperature to low/high limit (COOLING 61℉[16℃], HEATING 86℉[30℃]).
However, it is possible that the COOLING/HEATING max operation can not be obtained depending on the circumambient
condition.

4 – 2

[5] FLOW CHART OF REFRIGERANT CYCLE

AE-X15PU

5-2 HEATING5-1 COOLING & DEFROSTING

[6] CHARACTERISTIC OF COOLING AND HEATING OPERATION

6-1 AY-XPC15PU / AE-X15PU

CAUTION: Indoor fan speed is set to [HIGH].
Airflow direction is initial.
Air inlet temperature of is 80℉ (26.7℃) during COOLING operation, and 70℉ (21.1℃) during HEATING operation.

1300

1200

1100

1000

900

POWER CONSUMPTION (W)

800

65 75 85 95 105 115

17.0

16.0

6-1-1 COOLING 6-1-2 HEATING

OUTSIDE TEMPERATURE（℉)

1850

1700

1550

1400

1250

POWER CONSUMPTION (W)

1100

23 31 39 47 55 63

OUTSIDE TEMPERATURE（℉)

26.0

22.0

15.0

14.0

13.0

COOLING CAPABILITY (kBTU)

12.0
65 75 85 95 105 115

OUTSIDE TEMPERATURE（℉) OUTSIDE TEMPERATURE（℉)

4 – 3

18.0

14.0

10.0

HEATING CAPABILITY (kBTU)

6.0
18 28 38 48 58 68

AE-X15PU

6-2 AY-XPC18PU / AE-X18PU

CAUTION: Indoor fan speed is set to [HIGH].
Airflow direction is initial.
Temperature of inlet is 80℉ (26.7℃) during COOLING operation, and 70℉ (21.1℃) during HEATING operation.

1600

1500

1400

1300

1200

POWER CONSUMPTION (W)

1100

65 75 85 95 105 115

20.0

19.0

18.0

17.0

16.0

COOLING CAPABILITY (kBTU)

15.0
65 75 85 95 105 115

6-2-1 COOLING

OUTSIDE TEMPERATURE（℉)

OUTSIDE TEMPERATURE（℉)

6-2-2 HEATING

2300

2120

1940

1760

1580

POWER CONSUMPTION (W)

1400

23 31 39 47 55 63

OUTSIDE TEMPERATURE（℉)

30.0

26.0

22.0

18.0

14.0

HEATING CAPABILITY (kBTU)

10.0
23 31 39 47 55 63

OUTSIDE TEMPERATURE（℉)

6-3 AY-XP24PU / AE-X24PU

CAUTION: Indoor fan speed is set to [HIGH].
Airflow direction is initial.
Temperature of inlet is 80℉ (26.7℃) during COOLING operation, and 70℉ (21.1℃) during HEATING operation.

6-3-1 COOLING

2800

2600

2400

2200

2000

POWER CONSUMPTION (W)

1800

65 75 85 95 105 115

OUTSIDE TEMPERATURE（℉)

28.0

26.0

24.0

22.0

20.0

COOLING CAPABILITY (kBTU)

18.0
65 75 85 95 105 115

OUTSIDE TEMPERATURE（℉)

2600

2400

2200

2000

1800

POWER CONSUMPTION (W)

1600

23 31 39 47 55 63

35.0

30.0

25.0

20.0

15.0

HEATING CAPABILITY (kBTU)

10.0
23 31 39 47 55 63

6-3-2 HEATING

OUTSIDE TEMPERATURE（℉)

OUTSIDE TEMPERATURE（℉)

4 – 4

CHAPTER 5. DISASSEMBLING PROCEDURE

If, in carrying out repairs and modifications, the work requires the use of arc- and flame-producing apparatus, such as welding, brazing and soldering
equipment, this work shall only be started after the rooms have been thoroughly ventilated. While the work is being carried out, the mechanical venti­lation, if any, shall be kept in constant operation and all windows and doors kept open. In the case of repairs to parts of the refrigerant circuit, it may
be necessary that not only the workman but also a second person shall be present for observation and assistance. Necessary protective equipment
shall be available and, in the case of open flames or arcs, fire extinguishing apparatus shall be ready to hand. Welding and brazing shall be carried
out by qualified workmen. Be sure to disconnect the power cord from the AC power outlet before starting the disassembly procedure. When reassem-

the unit after repairing, be sure to install screws to their original positions. The screws used are not the same in specifications such as corrosion-

b

ling
resistant treatment, tip shape and length. After the air conditioner is repaired or parts are replaced, measure insulation resistance of the equipment
using an insulation resistance meter. If the measured resistance is lower than 1 MΩ, inspect parts and repair or replace defective parts.

AE-X15PU

[1] OUTDOOR UNIT

Be sure to disconnect the power cord from the AC power outlet before starting the disassembly procedure. When reassembling the unit after repair­ing, be sure to install screws to their original positions.

The screws used are not the same in specifications such as corrosion-resistant treatment, tip shape and length.
After the air conditioner is repaired or parts are replaced, measure insulation resistance of the equipment using an insulation resistance meter. If the

measured resistance is lower than 1 MΩ, insp

1. MAIN UNIT

1) Unscrew the 2 screws fixing the control box cover and remove it.

ect parts and repair or replace defective parts.

3) Unscrew 3 screws fixing the cable holder and remove it.

Control box cover

2) Unscrew the 2 screws fixing the valve cover and remove it.

Valve cover

Cable cover

4) Loose the screws fixing the connecting cable and unscrew
the Nut, remove the Wire conduit

Nut

Wire

conduit

5 – 1

AE-X15PU

5 – 2

5) Unscrew the 2 screws fixing the cable holdor and remove it

6) Unscrew the 6 screws fixing the top plate and remove it.

7) Unscrew the screw fixing the service panel, then slide the panel
downward and remove it.

8) Unscrew the 4 screws fixing the motor angle T and remove it.

Service panel

Motor angle T

9) Unscrew the 2 screws fixing the angle and remove it.

10) Unscrew the 4 screws fixing the front panel and remove it.

1

2

Angle

11)Disconnect the 4 connectors and the 2 terminals.

Terminal

Connector

12)Cut the fixing band.

5 – 3

AE-X15PU

13).Unscrew the 3 screws fixing control unit and remove it.

Contol

unit

14)Remove the 2 compressor covers.

Compressor

cover

15)Unscrew the nut fixing the terminal cover and remove it.

Nut

Terminal

cover

16)Disconnect the 3 terminal connected with the compressor.

17)Unscrew the 2 screws fixing the bu khead and remove it.

18)Unscrew the 2 screws fixing the motor angle and remove it.

19)Unscrew the nut fixing the fan and remove it.

20)Unscrew the 4 screws fixing the motor and cut the fixing band, and
then remove the motor.

Nut

Fixing band

Bulkhead

5 – 4

[2] DISASSEMBLY OF CONTROL UNIT

1. Control unit box’s Approach to decomposition

AE-X15PU

5) Unscrew the 4 screws fixing the Heatsink holder and remove it.

6) Remove 1 screw and the 2 metal covers.

7) Unscrew the 4 screws fixing the Heatsink and remove it from
Heatsink holder

Heat sink

holder

Metal cover

control

cover

1) Unscrew the 2 screws and remove the terminal board.

2) Unscrew the 2 screws fixing the terminal angle and remove it.

3) Remove the metal cover.

4) Unscrew the 8 screws fixing the control board unit and remove it

PARTS GUIDE

SPLIT TYPE
ROOM AIR CONDITIONER

AE-X15PU

OUTDOOR UNIT

MODEL

[1] OUTDOOR UNIT PARTS

[2]

OUTDOOR UNIT STRUCTURE
AND CYCLE PARTS

AE-X15PU
AE-X18PU
AE-X24PU

In the interests of user-safety (Required by safety regulations in some countries) the set should
be restored to its original condi ion and only parts identical to those specified should be used.

CONTENTS

[3] OTHER OUTDOOR UNIT

ELECTRIC PARTS

[4] OUTDOOR PACKING PARTS

To have your order filled promptly and correctly, please furnish the
following information.

1. MODEL NUMBER 2. REF. No.

3. PART NO. 4. DESCRIPTION

★ MARK: SPARE PARTS-DELIVERY SECTION

Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and performance of the set.

“HOW TO ORDER REPLACEMENT PARTS”

This document has been published to be used
for after sales service only.
The contents are subject to change without notice.

AE-X15PU

[1] OUTDOOR UNIT PARTS FOR AE-X15PU, AE-X18PU, AE-X24PU

2

AE-X15PU

RANK

MARK

RANK

CMOTLB537JBEZ N FAN MOTOR 1

MOTOR ANGLE T 1

MOTOR ANGLE 1

FAN MOTOR ANGLE SUB 2

FRONT PANEL L 1

FAN GUARD 1

FRONT PANEL R ASS'Y 1

FRONT PANEL R 1

HANDLE 1

IIR SHEET A 1

N PROPELLER FAN 1

SIDE CABINET L 1

IIR SHEET 1

IIR SHEET B 1

SIDE CABINET R SEAL 1

SPRING 2

THERMISTOR SPRING 1

CABLE HOLDER 1

CABLE COVER 1

PCOV-B981JBFA N SIDE COVER 2 1

PSEL-E389JBEZ N SIDE COVER SEAL 1

PCOV-C030JBFA N VALVE COVER 1

TOP PLATE ASS'Y 1

TOP PLATE 1

TOP PLATE SEAL A 1

TOP PLATE SEAL B 1

TOP PLATE SEAL C 1

TOP PLATE SEAL E 1

BULKHEAD ASS'Y 1

BULKHEAD 1

BULKHEAD SEAL 1

BULKHEAD SEAL A 1

BULKHEAD SEAL B 1

BULKHEAD SEAL C 1

ANGLE ASS'Y 1

BASE PAN ASS'Y 1

BASE PAN SUB ASS'Y 1

BASE PAN SEAL C 1

FLARE COUPLING BASE 1

SPECIAL NUT 1

THERMISTOR HOLDER 1

MOTOR ANGLE T SEAL 1

TLAB-F617JBRA N ENERGY LABEL 1

TLAB-F696JBRZ N CAUTION LABEL UL 1

TLAB-F748JBRZ N UL COPPER WIRE LABEL 1

[2] OUTDOOR UNIT STRUCTURE AND CYCLE PARTS(AE-X15PU,AE-X18PU,AE-X24PU)

NO. PARTS CODE

1-1
1-2 LANGKA326JBTA N
1-3 LANGKA325JBTA N
1-4 LANGKA324JBTA N
1-5 GCAB-A469JBTA N
1-6 GGADFA049JBFA

1-7 CCAB-A586JBKZ N
1-7-1 GCAB-A468JBTA N
1-7-2 JHNDPA030JBFA N
1-7-3 PSPF-B182JBEZ
1-7-4 PSEL-E252JBEZ FRONT PANEL R SEAL 1

1-8 NFANPA152JBEZ

1-10 GPLTMA081JBTA N
1-11 JHNDPA032JBFA HANDLE 1

1-12 CPLT-A216JBKZ N SIDE CABINET R ASS'Y 1
1-12-1 GPLTMA080JBTA N SIDE CABINET R 1
1-12-2 PSEL-E388JBEZ N SIDE CABINET R SEAL B 1
1-12-3 PGUMSA148JBE0 DAMPER RUBBER 1
1-12-4 PSPF-E329JBEZ N
1-12-5 PSPF-B185JBEZ
1-12-6 PSEL-E120JBEZ

1-13 MSPR-A026JBE0

1-14 MSPR-A036JBE0

1-18 LHLD-B206JBWZ N

1-19 PCOV-B982JBWZ N

1-20

1-21

1-22

1-23 DCAB-A185JBKZ N
1-23-1 GCAB-A478JBTA N
1-23-2 PSEL-E129JBEZ
1-23-3 PSEL-E130JBEZ
1-23-4 PSEL-E131JBEZ
1-23-5 PSEL-E284JBEZ

1-24 CSKR-A569JBKZ N
1-24-1 PSKR-A410JBTA N
1-24-2 PSEL-E285JBEZ
1-24-3 PSEL-E286JBEZ
1-24-4 PFPFPE480JBEZ
1-24-5 PFPFPE481JBEZ

1-25 CANG-A358JBKZ

1-26 CCHS-B373JBKZ
1-26-1 CCHS-B375JBTA N
1-26-2 PFPFPE477JBEZ

1-28 PDAI-A292JBTA N

1-29 LX-NZA428JBEZ

1-30 LHLD-B217JBFA N

1-31 PSEL-E406JBEZ

1-32 XTTWW40P16000 TAPPING SCREW 4

1-33

1-34

1-35

PRICE

BL
AN
AY
AH
BB
BC
AZ
AW
AG
AY

AC
AY
AX
AG
BC
AZ
AC
AE
AG
AX
AK
AB
AB

AE
AK
AT

AC

AP

BC
AZ
AK
AN
AK

AL
AW

AU
AE
AD
AC
AC
AK
BC
BC
AC
AM
AC
AE
AC
AC

AM
AF

AF

NEW

PART

DESCRIPTION Qty

3

AE-X15PU

RANK

RANK

TLABBA291JBRA AK PCI LABEL 1

TLABMA849JBRA AM INVERTER LABEL 1

AH N NAME LABEL 1

AY 2WAY VALVE UNIT 1

BC 3WAY VALVE UNIT 1

CP N CONDENSER (AE-X15PU) 1

DCON-A754JBPZ CU N CONDENSER (AE-X18PU,AE-X24PU) 1

BS N REVERSE VALVE ASS'Y (AE-X15PU) 1

BT N REVERSE VALVE ASS'Y (AE-X18PU,AE-X24PU) 1

BG N EXPAN.VALVE ASS'Y (AE-X15PU) 1

BH N EXPAN.VALVE ASS'Y (AE-X18PU,AE-X24PU) 1

AK COMRESSOR COVER TOP 1

PSPF-B328JBEZ AS N COMRESSOR COVER 1

CF N COMRESSOR 1

AH FRANGE NUT 1

AH GASKET WASHER 1

AR TERMINAL COVER 1

AK TERMINAL GASKET 1

AB NUT 1

AC WASHER 22 1

AF COMPRESSOR CUSHION 1

AG FLARE NUT ASS'Y 1

AN FLARE NUT ASS'Y 1

AU N COIL ASS'Y 1

BC COIL 1

PGUMS0170JBE0 AE DAMPER RUBBER 1

AL COVER 1

CA N CONTROL BOARD UNIT (AE-X15PU) 1

CA N CONTROL BOARD UNIT (AE-X18PU) 1

CA N CONTROL BOARD UNIT (AE-X24PU) 1

LHLD-B240JBFZ AT N HOLDER 1

AF N HOLDER C 1

AN N TERMINAL ANGLE 1

AU N TERMINAL BOARD 1

AK CONTROL BOX B 1

AM CONTROL BOX 1

AQ N CONTROL BOX C ASS'Y 1

AY N REACTOR 1

AY N THERMISTOR 1

AD N WIRING DIAGRAM 1

AF LABEL 1

QFS-GA077JBZZ AD Fuse (FU3) 1

QFS-GA078JBZZ AD Fuse (FU2) 1

QFS-GA090JBZZ AG Fuse (FU5) 2

QFS-GA091JBZZ AG N Fuse (FU1) 1

AH Surge absorb (SA1) 1

QW-VZG365JBZZ AF Lead wire(BT2) 1

QW-VZG366JBZZ AF Lead wire (BT1) 1

QW-VZG372JBZZ AF Lead wire (BT6) 1

QW-VZG613JBZZ AG Lead wire (BT12) 1

QW-VZG614JBZZ AG Lead wire (BT13) 1

[2] OTHER OUTDOOR UNIT ELECTRIC PARTS(AE-X15PU,AE-X18PU,AE-X24PU)

NO. PARTS CODE
1-36

1-37
1-38 TSPC-H649JBRZ

2-1 DVLV-B073JBKZ
2-2 DVLV-B074JBKZ
2-3 DCON-A753JBPZ
2-3
2-4 DVLV-B343JBKZ
2-4 DVLV-B346JBKZ
2-5 DVLV-B344JBKZ
2-5 DVLV-B354JBKZ
2-6 PSPF-B239JBEZ
2-7
2-8 PCMPRA688JBEZ

2-9 LX-NZA411JBEZ
2-10 PSEL-E239JBEZ
2-11 PCOV-B887JBEZ
2-12 PSEL-E240JBEZ
2-13 XNFS760-50000
2-14 LX-WZA057JBEZ
2-15 GLEG-A162JBEZ
2-16 PSEN-A044JBKZ
2-17 PSEN-A053JBKZ
2-18 CCIL-A185JBKZ
2-19 RMOTSA037JBZZ
2-20

3-1 PCOV-B888JBWZ

3-2 DSGY-F029JBKZ

3-2 DSGY-F033JBKZ

3-2 DSGY-F122JBKZ

3-3

3-4 LHLD-B241JBFZ

3-5 LANG-A771JBWZ

3-6 QTANZA091JBZZ

3-7 PBOX-A570JBWZ

3-8 PBOX-A576JBWZ

3-9 CBOX-A082JBKZ
3-10 RCILZA051JBZZ
3-11 RH-HXA187JBZZ
3-12 TLABCE028JBRZ
3-13 TLABNA002JBRZ

PRICE

NEW MARK

PART

DESCRIPTION Qty

4-1

4-2

4-3

4-4

4-5 QSPGCA006JBZZ

4-6

4-7

4-8

4-9
4-10

4

AE-X15PU

RANK

RANK

QW-VZG615JBZZ AG Lead wire (BT14,BT15,BT16) 1

QW-VZG713JBZZ AF Lead wire (BT5) 1

QW-VZG762JBZZ AE Lead wire (BT4) 1

QW-VZG772JBZZ AE Lead wire (JPL1A-JPL1B) 1

QW-VZG773JBZZ AE Lead wire (JPL2C-JPL2D) 1

QW-VZG775JBZZ AE Lead wire (BT3) 1

BB Capacitor(C8,C9,C10) 2

AD Varistot(NR1,NR2) 2

NO. PARTS CODE

PRICE

NEW MARK

4-11
4-12
4-13
4-14
4-15
4-16
4-17 RC-EZA371JBZZ
4-18 VHVTVR10511-B+

[4] OUTDOOR PACKAGE PARTS

5-2

PART

DESCRIPTION Qty

5-1

NO. PARTS CODE

5-1 CPADBA164JBKZ AZ Bottom Pad Assembly
5-2 CPADBA165JBKZ AN Packing Pad Assembly
5-3 SPAKCE213JBEZ BA Packing Case

PRICE
RANK

NEW

MARK

PART
RANK

5-3

DESCRIPTION

5