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
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