IVT GS-XP12HR-N User manual

SERVICE MANUAL
xxxxxxxxx
No. XXXXXXXXXXXXX
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.
CHAPTER 1. SPECIFICATION
[1] SPECIFICATION............................................ 1-1
[2] EXTERNAL DIMENSION............................... 1-2
[3] WIRING DIAGRM .......................................... 1-4
[4] ELECTRICAL PARTS .................................... 1-4
CHAPTER 2. EXPLANATION OF CIRCUIT AND OP-
ERATION
[1] BLOCK DIAGRAMS....................................... 2-1
[2] MICROCOMPUTER CONTROL SYSTEM........ 2-3
[3] FUNCTION..................................................... 2-7
CHAPTER 3. TROUBLESHOOTING
[1] TROUBLESHOOTING GUIDE....................... 3-1
[2] THERMISTOR TEMPERATURE CHAR-
ACTERISTICS ............................................... 3-5
[3] HOW TO OPERATE THE OUTDOOR
UNIT INDEPENDENTLY................................ 3-5
CHAPTER 4. REFRIGERATION CYCLE
[1] FLOW FOR REFRIGERANT.........................4-1
[2] STANDARD CONDITION ..............................4-1
[3] TEMPERATURE AT EACH PART AND
PRESSURE IN 3-WAY VALVE ......................4-1
[4] PERFORMANCE CURVES...........................4-1
CHAPTER 5. DISASSEMBLING PROCEDURE
[1] DISASSEMBLY OF INDOOR UNIT...............5-1
[2] DISASSEMBLY OF OUTDOOR UNIT.........5-13
Parts Guide
TopPage
CONTENTS
SPLIT TYPE
ROOM AIR CONDITIONERS
OUTDOOR UNIT
AE-X12FR-N
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.
INDOOR UNIT
GS-XP12HR-N
CEILING TYPE
FLOOR TYPE
MODELS

GSXP12HRN
1 – 1
GSXP12HRN Service Manual
CHAPTER 1. SPECIFICATION
[1] SPECIFICATION
1. GS-XP12HR-N / AE-X12FR-N
NOTE: The condition of star "✩" marked item are ‘ISO5151’ : 1994(E), condition T1, Voltage 230V.
MODEL INDOOR UNIT OUTDOOR UNIT
ITEMS GS-XP12HR-N AE-X12FR-N
Cooling capacity (Min. ~ Max.) kW 3.5 (0.9 - 4.0)
Heating capacity (Min. ~ Max.) kW 4.2 (0.9 - 6.0)
Moisture removal (at cooling) Liters/h 0.9
Electrical data
Phase Single
Rated frequency Hz 50
Rated voltage V 230
Rated current ✩
(Min - Max.)
Cool A 4.5 (1.2 - 6.0)
Heat A 4.7 (1.3 - 7.0)
Rated input ✩
(Min - Max.)
Cool W 900 (200 - 1300)
Heat W 970(180 - 1800)
Power factor ✩Cool % 87
Heat % 90
Compressor Type Hermetically sealed rotary type
Model 5RS092XDF
Oil charge RB68A or FREOL ALPHA68M 320ml
Refrigerant system Evaporator Louver Fin and Grooved tube type
Condenser Corrugate Fin and Grooved tube type
Control Expansion valve
Refrigerant (R410A) 1000g
De-lce system Micro computer controled reversed systems
Noise level (at cooling) High dB(A) 43 49
Low dB(A) 35 -
Soft dB(A) 29 -
Fan system
Drive Direct drive
Air flow quantity (at cooling) High m3/min. 12.9 30.2
Low m3/min. 10.3 –
Soft m3/min. 7.3 –
Fan Centrifugal fan Propeller fan
Connections
Refrigerant coupling Flare type
Refrigerant tube size Gas, Liquid 1/2", 1/4"
Drain piping mm O.D φ20
Others
Safety device Compressor: Thermal protector
Fan motors: Thermal fuse
Fuse, Micro computer control
Air filters Polypropylene net (Washable)
Net dimensions Width mm 1025 780
Height mm 212 540
Depth mm 680 265
Net weight kg 31 37

GSXP12HRN
1 – 2
[2] EXTERNAL DIMENSION
1. GS-XP12HR-N / AE-X12FR-N
1.1. Indoor unit
1.2. Outdoor unit
CRMC-A442JBE0
R03(AAA) 2PCS.
SHARPCORPORATION
INVERTERAIR CONDITIONER
22.0
58 18.5
175
250
680
1025
949
212
204
265
780
540
14
167.5
165
540
299
72
58
37.5
12
4.5
324
135
81
136

GSXP12HRN
1 – 3
1.3. Installation demensions
1.3.1 Ceiling type
1.3.2 Floor type
1025
212
680
156
250 204
400
949
141
110
419 398
Length unit: mm
(unit size)
(unit size)
(unit size)
Hole for drainage pipe
(Ø 50mm)
Hole for refrigerant
and drainage pipe
(Ø 80mm)
Hole for refrigerant
and drainage pipe
(Ø 80mm)
Horizontal base line
Air outlet
(bolt pich)
(VIEW FROM FRONT)
(VIEW FROM CEILING)
680
220
110
141
156
212
250
1025
398419
949
400
(VIEW FROM TOP)
(unit size)
(unit size)
(unit size)
Hole for drainage pipe
(Ø 50mm)
Hole for refrigerant
and drainage pipe
(Ø 80mm)
Hole for refrigerant
and drainage pipe
(Ø 80mm)
Horizontal base line
Air outlet
(bolt pich)
Length unit: mm
(VIEW FROM FRONT)

GSXP12HRN
1 – 4
[3] WIRING DIAGRM
1. Indoor unit
1.1. GS-XP12HR-N
2. Outdoor unit
2.1. AE-X12FR-N
[4] ELECTRICAL PARTS
1. Indoor unit
1.1. GS-XP12HR-N
2. Outdoor Unit
2.1. AE-X12FR-N
DESCRIPTION MODEL REMARKS
Indoor fan motor MLB052 220 - 240V, 50Hz
Indoor fan motor capacitor – 450V, 3µF
Transformer – Primary; AC 220 - 240V, 50Hz
Secondary; AC19V, 50Hz
FUSE1 – QFS-GA062JBZZ (250V, 3.15A)
FUSE2 – QFS-GA064JBZZ (250V, 1A)
DESCRIPTION MODEL REMARKS
Compressor 5RS92XDF D.C. brush-less motor

GSXP12HRN
1 – 5
Outdoor fan motor ML-A902 DC Motor
Fu4 – QFS-GA064JBZZ
(250V, 1A)
Fu3 – QFS-GA051JBE0
(250V, 2A)
Fu2 – QFS-GA052JBZZ
(250V, 3.15A)
Fu1 – QFS-CA001JBZZ
(250V, 20A)
Fu5, 6 – QFS-CA002JBZZ
(250V, 15A)
DESCRIPTION MODEL REMARKS

GSXP12HRN
2 – 1
GSXP12HRN Service Manual
CHAPTER 2. EXPLANATION OF CIRCUIT AND OPERATION
[1] BLOCK DIAGRAMS
1. INDOOR UNIT
AC power
CPU
3.15 A
FUSE1
DC power supply circuit
Fan motor phase control circuit
Rotation pulse input circuit
AC clock circuit
Louvre motor drive circuit
Remote controller signal reception circuit
Buzzer drive circuit
CPU reset circuit
CPU oscillator circuit
Room temp. detect circuit
Heat exchanger pipe thermo circuit
Compensation circuit/ select circuit
Switchover circuit
Serial I/O circuit
Compressor relay drive circuit
LED drive circuit
Auto restart circuit
Test run circuit
Auxiliary mode
Power on circuit
Cluster generator drive circuit
Cluster generator sensor circuit
Room fan motor
Fan motor pulse detect
Flow direction control
Wireless remote control operation
Audible operation confirmation
Room temp. thermistor
Heat exchanger pipe thermistor
Model select
Wireless, preheat, auto restart
Indoor/outdoor control signal I/O
Outdoor unit power supply on/off control
LED display
Test run (forced operation)
Auxiliary mode button ON/OFF
Self diagnostics, fault diagnosis
Cluster generator
Unit-unit wiring
(AC power and
serial signals)

GSXP12HRN
2 – 2
2. OUTDOOR UNIT
CPU
20A
protection
15A
protection
Expansion valve drive circuit Expansion valve
Suction temp. thermo. circuit Suction pipe thermistor
2-way valve temp. thermo. circuit 2-way valve thermistor
3.15A
protection
15A
protection
Power supply circuit
CPU oscillator circuit
DC overvoltage detection circuit
Outdoor fan drive circuit
4-way valve relay drive circuit
Power transistor module drive circuit
Serial I/O circuit
CPU reset circuit
Position detection circuit
AC overcurrent detection circuit
Compressor thermo circuit
Heat exchanger pipe thermo circuit
Outdoor temp. thermo. circuit
LED drive circuit
Test mode circuit
Power factor
converter circuit
Filter
circuit
Smoothing
circuit
Pulse amplitube modulation circuit
EEPROM
AC clock circuit
DC overcurrent detection circuit
IGBT
Unit-unit wiring (AC power
and serial signals)
Outdoor fan
4-way valve
Power transistor module
Compressor
Current transformer
Compressor thermistor
Heat exchanger pipe thermistor
Outdoor temperature thermistor
LED

GSXP12HRN
2 – 3
[2] MICROCOMPUTER CONTROL SYSTEM
1. INDOOR UNIT
1.1. Electronic Control Circuit Diagram
NO. CN206, C24, R125, R126
CN201, CN6, D10, D11, D12,
JP7 JP11
JP5 JP6
JP4
JP3
JP2
JP1
NONE NONE
NONENONE 13K NONE
NONE JP
USE USE NONE
USE USE USE USEUSE
GS-XP12HR
NF201,
CLUSTER1,
TH3
R46 R44 R47
JP99 R43 R107
Q16
1
23
12V
BLUE
BLACK
BLUE
PURPLE
GRAY
RED WHITE
BLACK
RED
YELLOW GREEN /
BROWN
BCN2
D32
RY6
INOUT
1 22
1
BCN1
UNIT OUTDOOR
TO
TERMINAL
1 2
N
BOARD2 TERMINAL BOARD1
N
L
POWER SUPPLY
10000p
250V
4700p
250V
G
S
0.1μ
50V
50V
0.1μ
50V
0.1μ0.1μ
50V
5V
250V
FUSE1
RESET
MO
9GND 7 6OE
SERIAL
5
CLOCK
4 35V 212V 1BUSY
8
SSR2
100K
0.047μ
+
1
11K
11K
22K
3
4
PC1
PC2
14
32
-24V
5V
50V
0.1μ
10K
1.8K
3
2
1
0.01μ
0.1μ0.1μ 50V
50V
12V
470
3
2
1
3
2
1
23
1.8K
5V
IC1
M3803
**
P47
P46
P44
P37
P15
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
P43
P45
P50
P51
P52
P53
P54
P55
P56
P57
P60
P61
P62
17 18 19 20 21 22 23 24 25 26 27 28 29
P42
CNVss (Vpp)
RESET
P41 P40 Xin Xout Vss P27 P26 P25 P24 P23
30 31 32
P22 P21 P20
P36 P35
49 50 51
P34 P33 P32 P31 P30 Vcc Vref AVss P67 P66 P65 P64 P6364
63 62 61 60 59 58 57 56 55 54 53 52
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33P17
P16
P14
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
1234
5V
1μ
50V
IC7
3
0.1μ
50V
1
8M
OSC1
5V
1 2 3 4 5
1 2 3 4 5
12V
1 2TH1
1 2 3 4
TH2 PIPE TMEP.
(25ºC)
TEMP
VALVE
3
50V
0.1μ
+
10K 10K
10K
50V
5V
3.3K
35V
100μ
50V
250V
0.01μ
0.01μ
5V
3 1 2
50V
0.1μ
680
1 3
L1
275V
10.033μ
1W
SSR2
100
0.01μ
275V
12V
BZ1
0.1μ
12V
50V
50V
0.1μ
3.3K
0.1W
5V
1
CLUSTER2
1 3
7 6 5 3 1
3 1
10K
L
CN80
(XA)
(XA)
(XH)
CN301
(XH)
(XH)
(PH)
CN
202
CN
207
10K
5V
25V
+
10K
25V
10K
+
ROOM TMP.
4.7K
1
2 3
(SM)
RECEIVER BOARD UNIT
DISPLAY BOARD UNIT
5 3
B A
FAN
CAPACITOR
MOTOR
)
(
DRAIN
PUMP
680 680
2W
2W
680
680
2W
2W
680
R8 R9
R10
R11
R12
2W
2 1 3
50V
PC853H
PC817X3
2.7K
R40
R36
NF301
C71
0.01μ
D8
47μ
1μ
C21
2W
2W
2
4.7K
ZD1
R86
R85
R83
C40
R89
R106
C45
C44
C43
C42
R88
C41
C47 R92 R93
R94
R95
R96
R97
502
C501 C502
R501
R502
LED503
CN501
R103
R102
R101
C53
C52
C51
R100
10K
R99
R98
R104
C50C49C48
R105
C56
C57
C58
C59
Q2
R20
RY5 Q3
C19
R21
R22
R23
R24
R46 R47
R45 R44 R43
D13
R32
R33 D15
C26
C25
C27
R37
R38
R39
R58
Q10
D12
10K
R31
D11
R30
C24
D10
R29
D7
R28
C23
D6
3
C18
R19
C17
C16
R18
C15
RY5
R17
47μ
5V
(PH)
CN11
47
1/2W
47
47
IC5
8
12V
9
10μ
16V
+
10K
10μ
16V
16V
10μ
10K +
+6.8KF
12V
1/2W
0.033μ
275V
100
1W
FAN
MOTOR
IC
PROTECTOR
THERMAL (VH)
N
CN2
CN3
CN15
CN14
CN13
CN12
CN6
CN5
CN4
33K
5V
MODEL
5 4
2 1 33
1 2
4 55
4
2 1 3
1 2
4 5
CN
0.1μ
+ 10V
47μ
10K
8 7 6 9 8 7 4 1
9 8 7 4 1
8 7 6
1 2 3 4 5 6 7 88
7 6 5 4
3 2 11
2 3 4 5 6 7 8
(PH)
208
CN CN
203
5V
47
1/2W
(XA)
CN302
(XH)
6.8K6.8K
5V
5
1
2
3
4
IC8
5V
50V 0.1μ
7
6
8
1K 1K
5V
POWER ON
33K
JP99
CLUSTE
PLASM
A
TIMER
OPERA
T
1/4W
1/4W
1/4W
IC501
SW501
LED501
LED502
BL
HALL
NC NC NC
R503
+
50V
NC
1000p
D18
10K
BLACK
BROWN
BLUE
NR1
NR2
/FLOOR
CEILING
MULTI / SINGLE
FILTER
AUX. (TEST RUN)
JP7
4.7K
R63
5V
33K
C8
16V
16V
16V
Q20 2
1 2 3 4 5 6 7 8
Q15
NC
NC
NC
NC
(PREHEAT)
CN10
R80
4.7K
TIME REDUCE
JP6
R62
33K
(SPARE)
R84
33K
R107 R61
R60
R59
JP3
JP2
JP1
5V
AUTO RES.
HOT KEEP
WIRELESS
33K
33K
33K
16V
0.01μ
C32
CON.
REMOTE
SELECT
JP5
SW1
D16
R56
5V
Q11
2
12V
GND
12V 5V
C14
+
100μ
10V
R3
C9
3.3K
R4
5V
C10 C11
C12
C13
D17
C5
TR1
275V
0.1μ
D1 ~ 4
IC3
0.1μ
7805
47μ 25V
+
IC2
7812
0.1μ
1000μ
35V
+
22K
22K
50V
IN
OUT
IN
JP11
50V
R1 R2
Q1
16V
0.01μ
2
1
20K
C3, 4 :C1, 2 :
C4 C3
C2
C1
SINGLE PHASE
.01μ
(TH3)
(CN99)
R128
1M
(VH - WHITE)
GREEN)
(XA -
ATTACH -
MENT
DUMMY
)
(
()
FLOAT
DRAIN
SWITCH
3 1
JP4
(CLUSTER1)
7 6 5 3 1NF201
1 3
CN206
CN201
8 7 6
1 3 8 7 6
100K
R55
Q9
R57
470
SSR1
12V
1
23
3
2
1W
5V
33K 33K
R41 R42
450V
3μ
2W
2W R26
R25
6.8K 6.8K
R126
6.8K
6.8K 2W
2W
R125
SSR1
275V
C22
R124
5V
2.7K
3K
2.7K
(PH)
LOUVER MOTOR
1
205 CN
6 5 4 3 2
210
CN
6.8KF
10KF
NC
NC
3.15A
SA1
OUT

GSXP12HRN
2 – 4
1.2. Printed Wiring Board
from DRAIN PUMP (WHITE CONNECTOR) (OPTION)
from FAN MOTOR
from CLUSTER UNIT
(LEFT)
from FAN MOTOR
to LOUVER M
from PIPE THERMISTOR from ROOM THERMISTOR
to CONTROL BOX to "L" OF TB1 to "2" OF TB2
to FAN M CAPACITOR
to "N" OF TB1
to "1" OF TB2 from "L" OF TB1
}
from DRAIN PUMP(OPTION) (GREEN CONNECTOR)
or
SHORTEN CIRCUIT ATACHMENT
}

GSXP12HRN
2 – 5
2. OUTDOOR UNIT
2.1. Electronic Control Circuit Diagram
9.53KF
R84
0V
Q10
0V
15V
0.01μ
10V
47μ
6.8KJ
R85
C77
R86
C78
2A
250V
FU3
7
5
4
3 2
1
0V
CN3
0.1μ
400V
C29
0V
5V
R83
10K
RY1
1
2
3
4
5
6
0V
IC7
M
a
b
5V
10K
10K
0V
j
0V
JP1
JP2
c
JPF
0V 100μ
C94
10V
C95
0.1μ
0.1μ
10K
R37 1K
R38 1K
R36 1K
0V U
V
W
C34
C35
C36
1000P x 3
D7
D6
TR1
R29
4.7K
68
18V - P
C85
0.1μ
R82
680μ
C19
IC3
R27
1W
IC4
5V
0V
R22
25V
C20R21
22K
R24
10K
R87
150μ
C84
D14
9
35V
0V -P
35V
R93
R94
R92
D20
C98
3
2
1
R78
IC5
C33
R77
50V 1μ
R79
100
0.1μ
C32
0V
QS
T
R
Q3
R
S T
9
Q
JP10
1 2 3 4 5 6 7 8
8
5
6
11
10
7
1K
10K
9
8
Q9
0V
2.2K
R32
R31
0V
R33
IC6
8 7
5
6
1
2
4
3
CNE
5V
R30
4
3
1 2
4.7K
13V
CN12
EXPANSION
VALV COIL
MRY1
13V
C38
0.1μ
24 27
23
22
21
28
18
16 13
15
12
4
10
7
9
6
1
3
10K
R45
5V
100μ
C47
1000P
C42
C48
10V
0.1μ
0V
IPM
330μ 25V
C37
100μ
25V
C49
0.1μ
25V
C51
0.1μ
C54
100μ
25V
C53
0.1μ
0.1μ
0.1μ C55
0.1μ
C57
C45
0.1μ
C56
D9
D10
100μ
C52
D8
C50
VWFB
VUFS
VUFB
WN
VN
UN
WP
VPI
VWFS
VPI
VPI
VP
VVFS
VVFB
UP
VNC
F0
VNI
C41
1000P
1000P
C40
C43
1000P
C44
1000P
C39
1000P
1K
R46
ZD4
16V 10μ x 5
C70~74
10Kx5 R63~67
0V
0V
CN8
10
6 5 4 3 2 7 9 8
0.01μ x 5 C65 ~ 69
5V
TH2
TH3
TH4
TH5
1
330K
R100
R107
PC4
330
Q7
KRC105S
1000P
C59
1/2W
R51 ~ 53
IPM
c
6
5
8
5W
R49
2 3
TLP351
j
M
270KD
R126
255KF
250V
FU5
0.02
5V
15A
470KF x 3
CIN
CF0
26
25
31
35
150 R110
250V
FU4
1A
j
1KV
C27
220PF
C15
50V
10μ
R17
STR -L
472
IC2
1/2W 1M
1/2W 1M
1/2W 1M
1
D5
1/2W 1M 1/2W 1M 1/2W 1M
R8 R9 R10
R11 R12 R13
3.3K
R20
2SA1586G
Q1
ZD1
0V
470P
C17
R14
R18
1.5K
3300P
D4
OCP/FB
1~4
8
710 96
Source
GND
Drain
Vcc
C18
680
R16
R15
C16
D15
1.6
1.6
3
D3
R19
15V
PC3
23
4
1
0.01μ
C81
R146
100K
e
d
5V5V
FU2
R105
0V
22K
3.3K
R106
C83
1000P
0.01μ
C82
Q6
KRC102S
10V
C79
R91 R147
10K
R90
D2
1.0KF 220μ
2.2K
R111
DB2
Q5
TERMINAL BOARD
N
1
WH WH
GR
R89
0V
BLUE
BROWN
YELLOW GREEN/
T2
T1
1
2
L3 L4
13
3
4
SA1
NR1
T4
R1
1/2W
1M
275V
1μF
275V 1μF
C2
4
2
1μF 275V
CT1
T6
510K
1/4W
R88
1/4W
510K
C1 C3
OUT
IN
PTC
MRY1
GR GR
T5
DB1
18V-P
4700pF
250V
4700pF
250V
4700pF
250V
4700pF
250V
R4
3.3K
D1 0.1μ
C13
1K 2W 2W
1K 1K
2W
4700P
250V C12
+
420V 420V
+
3.15A
250V
R101
R102
R103
R104
1/2W 47K x 2
R101, 102
1W 47K x 2
R103, 104
T10 T11
PC81716NIP
5V
0V
R55
R56
R54
C60
0.1μ
25V
R99 100
0.1μ
C86
15K R112
C61
50V
330P
330P
50V
C62
R57 100
R58 100
R59 100
C63
330P
50V
12
6
7
8
9
10
0.1μ
C64
25V
11 4
3
5
IC8
KIA339
1
5V
0V
0.01μ
C97
UVN
W
5V
0V
C88
1000P
N
1K
R116
RY1
120
1/2W
0.033μ
NR2
275V
CN4
C26 R28
3
1
d e
D24
2
RED
T3
R129
10K
T12
T13
250V
20A
FU1
R34
R35
JP16
5V
5V
0.1μ
C93
100μ
10V
C30
5V
0V
JP9
JP8
JP7
32 31 30 29 28 27 26 25 24 23 22 21 20
10111213141516171819 1
2
34
5
6
89 7
52 53 54 55 56 57 58 59 60 61 62 63 64
51504948474645444342414039383736353433
P07
P10
P11
P12
P13
P14
P15
P16
P17
P20
P21
P22
P23
P24
P25
P26
P27
VSS
P30
(U)
P44
P45
P46
P50
P51
P52
P53
P54
P55
P56
P57
AVCC
AVR
AVSS
P60
P61
P62
P63
MD0
(B) (O)
(Y)
(W)
IC1
RST MD1 MD2 X1 X0 VSS P00 P01 P02 P03 P04 P05 P06 P31
P32 P33 P34 P35 VCC C P36 P37 P40 P41 P42 P43
(X) (V)
(Y) (W) (Z)
(U)
(V)
(W)
R133 100
R132 100
R137 100
R136 100
R135 100
R134 100
5V
5V
2.2K
R73 LED1
10K
R155 10K
R154
5V
(CN)
4
1
2 3
OSC1 4MHz
0V
10K
10K
20
JP17
N
35
VNO
20.5KF
20.5KF
20.5KF
0V
PS21563 or 21564
FU6
250V
15A
1000P
C46
0V
0V
C4A
C5A
C7A
C6A
R41 R42
R43
10
2W
2K
680P
6.8K
6.8K
270
270
15V
D11 6.8KF x 5
R68 ~ 72
R47, 48
33 x 2
1/4W
1/4W 33 x 2
R47A, 48A
5V
C
(R)
S
(C)
R
FC3 FC4
YELLOW
GREEN/
EARTH
U32
V33
W34
T7
T8
T9
N
FC1
FC2
FB
D12
D13
R61
1.8K
R60
1.8K
R62
1.8K
1.8K
R115
R114
1M
14
13
2
0V -P
D23
D22
D21
15V
0V
0.022μ
C58
ZD3
R50
1.8KF
VALV COIL 4-WAY
PC1
PC817XP3
3
1
2.7K
R75
b
R74
a
1000P
C75
0V
4.7K
5V
R76
56K
4
1
2
4
32
PC853HXP
PC2
4.64KF
R26
R23
68K
C21
0.033μ
1.65KF
R25
1.5K
150μ
10K
10K
C23
0.1μ
7805
R81
10K R144
C76
1000P
5V
Q4
23.7KF
23.7KF
R6
R7 R128
13KF
R127
13KF
P
0.33μ
C14
630V
270KD
1/2W
R125
1/2W
R2
1/2W
300KF
1/2W
R5
750μ
C10
C9
750μ
(THERMISTOR CIRCUIT)
(THERMISTOR)
(SERIAL I/O CIRCUIT)
(PAM OVER CURRENT CIRCUIT)
(EEPROM CIRCUIT)
(4 - WAY VALVE CIRCUIT)
(FAN MOTOR CIRCUIT)
(FAN MOTOR)
(RESET CIRCUIT) (SWITCHING POWER
SUPPLY CIRCUIT)
KID65004AP
PST993D
KRA106S
KRC105S
KRC105S
KRA106S
(DC OVERCURRENT CHECK CIRCUIT)
MONITOR
(FOR DEBUG)
CND
(FRASH WRITER
CONNECTOR)
(LED CIRCUIT)
DETECT CIRCUIT) (ROTOR POSITION
+
C4
C5
C7
C6
2.7kF
6.8KF
13V
0.1μ
C31
C
19.1KF
R113

GSXP12HRN
2 – 6
2.2. Printed Wiring Board

GSXP12HRN
2 – 7
[3] FUNCTION
1. INDOOR UNIT
1.1. Startup control
The main relay remains off during the first 45 seconds (first safety
time) immediately after the power cord is plugged into an AC outlet in
order to disable outdoor unit operation and protect outdoor unit electric
components.
1.2. Restart control
Once the compressor stops operating, it will not restart for 180 sec-
onds 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.)
1.3. Temperature Adjustment
1.3.1 Cooling
When the room temperature is higher than the preset temperature by
2°C or more, the unit runs at the maximum operation frequency until
the temperature comes down to the preset temperature.
When reaching the preset temperature, the unit runs at the frequency
calculated by the fuzzy operation and switches to the normal control.
1.3.2 Heating
When the room temperature is lower than the preset temperature by
3.5°C or more, the unit runs at the maximum operation frequency until
the temperature comes down to the preset temperature.
When reaching the preset temperature, the unit runs at the frequency
calculated by the fuzzy operation and switches to the normal control.
1.3.3 Dry
After operation begins, 2 minutes of the room temperature is stored in
memory, and that becomes the set value.
1.4. Indoor fan control
1.4.1 Cooling
The fan speed can be selected from “Auto”, “Soft”, “Low”,and
“HIgh”.When “Soft”, “Low” or “HIgh” is selected, the fanspeed is con-
stant regardless of the room temperature.When “Auto” is selected, the
fan speed automatically changes between “Soft” and “HIgh” depend-
ing on the difference between the room and preset temperature.
Control for indoor freezing prevention
If the temperature of the indoor heat exchanger stays below approxi-
mately 0°C for 4 minutes during cooling or dry, this control stops the
compressor. Over 2°C the compressor will run again.
1.4.2 Heating
Control for cold air blowing prevention
When heating begins, this control stops the indoor fan until the tem-
perature of the indoor heat exchanger reaches 23°C. It also stops the
fan if the temperature goes below 21°C during operation.
1.5. Automatic operation
The operating mode and temperature setting are determined by the
room temperature and the external air temperature.
The operating mode will changeover automatically with the fol-
lowing condition.
1) From cooling to heating
Cooling mode will changeover to heating mode when condition of
indoor temperature 1.7°C lower than the set temperature condi-
tions for 5 minutes.
2) From heating to cooling
Heating mode will change over to cooling mode when condition of
indoor temperature 1.3°C higher than the set temperature condi-
tions for 25 minutes under compressor off condition.
3) When the set temperature is adjusted within the range of ±2°C by
the remote control’s key.
( ), the changeover judgement room temp. will also be shifted
within the range of ±2°C.
1.6. ON-timer
The ON-timer is set by pressing the ON-timer button.
In order to attain the set temperature at the set time.
1.7. OFF-timer
The OFF-timer is set by pressing the OFF-timer button. Operation is
as follows:
* During Heating
Compressor operation
ON operation on
remote control
OFF operation on
remote control
Compressor ON
Compressor ON Compressor can
turn ON
Compressor remains OFF
for 180 seconds
Set temperature
Cooling
Heating
By fuzzy computing
Set the shift up time
Final Cooling setting + 1°C
Heating setting - 3°C
Dry Same as above
(Final setting + 1°C)
The indoor fan stops.
Temperature of the indoor heat exchanger
Preset Fan speed
The indoor fan operates at low speed.
35ºC
23ºC
32ºC
21ºC
Heating
(24ºC)
Heating
(23ºC)
Cooling
(24ºC)
Cooling
(24ºC)
(Room temperature
-2ºC)
Cooling
(25ºC)
Cooling
(26ºC)
(Dry)
Room
temperature
(ºC)
When the cooling operation only can use winter kit
21
29
01018 28 34
Outdoor
temperature (ºC)
Cooling
(25ºC)
Cooling
(26ºC)
Heating
(22ºC)
3ºC Room
temperature
Timer set time
1
hour
Timer operation starts Stops

GSXP12HRN
2 – 8
* During Cooling / Dry
1.8. Swing louvre
The louvre is moved by a stepping motor to perform swing and fixing in
the set position.
If the “FLOW DIRECTION” button is prossed during swing, it will stop.
If the “FLOW DIRECTION” button is pressed while it is stopped, it will
swing.
The vertical adjustment louvre will change its angle continuously.
Press the SWING button again when the vertical adjustment louvre is
at the desired position.
• The louvre will stop moving within the range shown in the diagram.
• The adjusted position will be memorized and will be automatically
set to the same position when operated the next time.
1.9. One-hour operation
If this button is pressed when operation is stopped, operation will
begin and then stop after 1 hour.
If pressed when it is operating, will stop after one hour.
1.10. Full power operation
Immediately begins cooling or heating at maximum power and air flow.
(During heating)
Operates at setting of 32 °C.
(During cooling)
Operates at setting of 18 °C.
1.11. Power ON start
If a jumper wire is inserted into the place indicated JP99 on the indoor
control board, and the power plug is inserted. cooling or heating will be
automatically determined by the room temperature sensor on the main
unit, and operation will begin.
1.12. Auto Restart
When power failure occures, after power is recovered, the unit will
automatically restart in the same setting which were active before the
power failure.
Operating mode (Cool, Heat, Dry)
• Temperature adjustment (within 2°C range) automatic operation
• Temperature setting
• Fan setting
• Air flow direction
• Power ON/OFF
• Automatic operation mode setting
• Swing louver
• Plasmacluster operation mode
Setting not memorized
• Timer setting
• Full power setting
1.13. Error diagnostic display
Indoor unit
1) If the operation is stopped and the emergency operation button is
pressed down for 5 seconds or more, the self-diagnosis memory
can be recalled.
2) Details of self-diagnosis (error mode) are informed by the flashing
number as well as the lighting pattern of the operation lamp which
flashes with the timer lamp.(For details, refer to Error diagnostic
method.)
1.14. Compressor relay
1) It is ON during operation, and when operation is stopped, goes
OFF after a delay of 120 seconds (not immediately).
2) The minimum OFF time of the relay is 60 seconds. It will not go ON
again before 60 seconds elapses.
3) If air conditioner operation is turned on again during the 120 sec-
ond delay before the compressor relay goes off, the compressor
relay will stay on.
1.15. Drain water control (option)
When the float switch turns OFF (full level), the drain pump is forcibly
operated for 5 minutes.
After the pump operates for 5 minutes, the pump turns OFF if the float
switch is ON (empty). If the float switch is not ON (empty) even when 6
minutes elapse from the time of pump ON, the equipment stops oper-
ating due to a drain pump error.
1.16. Plasmacluster Ion function
Operating the Plasmacluster Ion button while the air conditioner is in
operation or in non-operation allows the switching of the operation
mode in the following sequence: “Air Clean operation” →“Stop”.
• “Self Clean operation” generates about equal amounts of (+)ions
and (-)ions from the cluster unit to provide clean air.
1ºC
Stops
Timer set time
1
hour
Timer operation starts
Room
temperature
Adjustment range
COOL and DRY modes
Floor standing
Ceiling suspended
HEAT mode
Floor standing
Ceiling suspended
The adjustment range is
narrower the SWING range
in order to prevent
condensation from dripping.
The range is wide so the air
flow can be directed
toward the floor.
ON
OFF
OFF
Air conditioner
operation
Compressor
relay
120 sec.
ON
ON
ON
OFF
ON
OFF
Air conditioner
operation
Compressor
relay
120 sec. 60 sec.
ON
ON
OFF
ON
ON
Air conditioner
operation
Compressor
relay
120 sec.

GSXP12HRN
2 – 9
If the Plasmacluster Ion generation function is operated together with
the air conditioner operation, the indoor unit fan speed and louver
direction are in accordance with the air conditioner settings.
If the Plasmacluster Ion generation function is used without operating
the air conditioning function, the indoor unit fan operates at a very low
speed and the upper louver is angled upward and the lower louver
remains horizontal. (The airflow volume and direction can be changed
by using the remote control.)
2. OUTDOOR UNIT
2.1. 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 freez-
ing.
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.
2.2. Indoor unit overheat prevention control
During heating operation, if the temperature of the indoor unit heat
exchanger exceeds the indoor unit heat exchanger overheat preven-
tion temperature (about 45 to 54°C) which is determined by the operat-
ing frequency and operating status, the operating frequency is
decreased by about 4 to 15 Hz. Then, this operation is repeated every
60 seconds until the temperature of the indoor unit heat exchanger
drops below the overheat protection temperature.
Once the temperature of the indoor unit heat exchanger drops below
the overheat protection temperature, the operating frequency is
increased by about 4 to 10 Hz every 60 seconds until the normal oper-
ation condition resumes.
If the temperature of the indoor unit heat exchanger exceeds the over-
heat protection temperature for 60 seconds at minimum operating fre-
quency, the compressor stops operating and then restarts after about
180 seconds, and the abovementioned control is repeated.
2.3. Outdoor unit overheat prevention control
During cooling operation, if the temperature of the outdoor unit heat
exchanger exceeds the outdoor unit heat exchanger overheat preven-
tion temperature (about 55°C), the operating frequency is decreased
by about 4 to 15 Hz. Then, this operation is repeated every 60 sec-
onds until the temperature of the outdoor unit heat exchanger drops to
about 54°C or lower.
Once the temperature of the outdoor unit heat exchanger drops to
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 out-
door 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 operating and
then restarts after about 180 seconds, and the abovementioned con-
trol is repeated.
2.4. Compressor overheat prevention control
If the temperature of the compressor exceeds the compressor over-
heat 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
abovementioned control is repeated.
2.5. 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.
2.6. 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.
2.7. Defrosting
2.7.1 Reverse defrosting
The defrost operation starts when the compressor operating time
exceeds 20 minutes during heating operation, as shown below, and
the outside air temperature and the outdoor unit heat exchanger tem-
perature meet certain conditions. When the defrost operation starts,
the indoor unit fan stops. The defrost operation stops when the out-
door unit heat exchanger temperature rises to about 13C or higher or
the defrosting time exceeds 10 minutes.
2.8. Winter cool
Cooling operation is available during the winter season by the built in
winter cool function.
Lower limit of outdoor temperature range is -10°C DB.
When the outside air temperature is low, the outdoor unit fan operates
at slower speed.
NOTE: Built-in protect device may work when outdoor temperature
falls below 21°C DB., depending on conditions.
Model Peak control current
Cooling operation Heating operation
GS-XP12HR-N Approx. 6.4 A Approx. 7.5 A
20 min or more 20 min or more 20 min or more
Defrosting
Max. 10 min
Defrosting
Max. 10 min
Start of
heating
operation

GSXP12HRN
2 – 10
3. Explanation of cluster circuit
The cluster unit generates cluster ions, which are circulated throughout the room by the air flow created by the blower fan (indoor unit fan motor) in
the air conditioner unit.
1) When microcomputer output turns "H," the IC6 output changes to "Lo," turning ON the SSR and applying 230 V to the cluster unit for the genera-
tion of cluster ions (positive and negative ions).
4. Outline of PAM circuit
4.1. 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.
1
3
12V
SSR
C23
RE RH
R20
IC6
AC230V
Microcomputer output
1
5
3
6
Cluster unit
R23
R75 R76
PAM drive circuit block diagram
Reactor L5
[PAM drive circuit]
+
Microcomputer (IC1)
AC
230V
Compressor
Reactor L6
Noise
filter
AC clock
detection
circuit
DB1
IPM
DB2
Compressor
position
detector
IGBT
drive
circuit
IGBT
Overvoltage
detection
circuit

GSXP12HRN
2 – 11
When the IGBT is ON, an electric current flows to the IGBT via the reactor (L5), (L6) and diode bridge (DB2).
When the IGBT turns OFF, the energy stored while the IGBT was ON is charged to the voltage doubler capacitor via the diode bridge (DB1).
As such, by varying the ON/OFF duty of the IGBT, the output voltage is varied.
4.2. 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 described 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.
4.2.1 Detailed explanation of PAM drive circuit sequence
4.2.2 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 (50Hz).
• The zero-cross of the AC voltage is judged as the rising of the clock waveform, as shown in the diagram above.
4.2.3 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.
4.2.4 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 240 V
– Heating operation --- 220 to 280 V
Stored energy
Reactor
L5
L6
DB1
DB2
IGBT
IGBT ON
IGBT OFF
AC voltage waveform
AC voltage and current waveform when PAM is ON
AC current waveform
IGBT ON period
Zero-cross detection
AC voltage waveform
AC current waveform
AC voltage and current waveforms when PAM is OFF
AC voltage waveform
Clock
IGBT ON
A
BC
A
B
C
50Hz
1.2mS
1.2mS
0.25 2.3mS

GSXP12HRN
2 – 12
4.3. PAM protection circuit
To prevent excessive voltage of PAM output from
damaging the IPM and electrolytic capacitor as well
as the control printed circuit board (PCB), this circuit
monitors the PAM output voltage and turns off the
PAM control signal and PAM drive immediately
when an abnormal voltage output is generated. At
the same time, it shuts off the compressor operation.
The PAM output voltage is distributed to pin (4) of
the comparator (IC8). If this voltage exceeds the ref-
erence voltage at pin (5) of the IC8, the output of the
comparator (IC8) reverses (from H to L) and it is
input to pin (38) of the microcomputer (IC1) to halt
the PAM drive.
The protection voltage level is as follows.
4.3.1 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 350 V or higher (detection circuit input voltage of about 9.2 V or higher) [IC8 pin (4)]
– 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 (50/60 Hz) 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 operating.
• 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
• Fuse (Fu6) open-circuit check
5. 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 overcurrent detection, etc., are provided outside the IPM (control PCB).
R2
255K
C10C9
420V
750uF R5
300K
R7
23.7K
R8
23.7K
0V
0V 0V
IC8
15V
R113
19.1KF
R112
15K
5V
R114
1M R115
1.8K R116
1K
5
4
2
(Overvoltage detection)
During abnormal voltage output
IC1
38

GSXP12HRN
2 – 13
5.1. 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 circuit board (PCB).
5.1.1 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 15-V
current.
The power supply for the subsequent stages is charged while the lower-phase IGBT is ON in ordinary compressor drive control.
P(Vcc)
U,V,W,
VD
VDB
VCIN(n)
N-side
IGBT
N(GN
D
Bootstrap capacitor
High-voltage-withstanding,
high-speed recovery diode
LVIC
(LU,LV,LW)
HVIC
(HU,HV,HW)
Bootstra
p
circuit
Initial charge period
Charging current group

GSXP12HRN
2 – 14
5.1.2 DC overcurrent detection circuit
When a current of about 25 A or higher flows through the shunt resistance (R49) on the control printed circuit board (PCB), the voltage at this resis-
tance is input to IPM CIN pin (26). Then, the gate voltage of the lower-phase IGBT (LU, LV, LW) inside the IPM turns OFF to cut off the overcurrent. At
the same time, an L output of about 1.8 ms is generated from IPM Fo pin (24), and this results in an L input to overcurrent detection input pin (34) of
the microcomputer (IC1) and turns OFF the PWM signal output (IC1 pins (51) through (56)) to the IGBT gate.
6. 120°energizing control (digital position detection control)
This control system detects the digital position detection signal and adjusts the rate of acceleration/deceleration accordingly.
The motor's induced voltage waveform is input to the comparator in the form of PWM-switched pulse waveform, and a position detection signal is
generated as a reference voltage equaling 1/2 of 280 VDC. However, since there is no induced voltage waveform when the PWM waveform is OFF,
the microcomputer performs internal processing so that detection is enabled only when it is ON. Based on the detected position signal, actual PWM
waveform output timing is determined. Since it does not use a filter circuit, the detection accuracy is high.
SET
RESET
(About 22 A)
SC
SC reference voltage
Delay by CR time constant circuit
About 1.8 ms
a1
Protection circuit status
Output current Ic (A)
Sense voltage relative
to shunt resistance
Error output Fo
(Lower phase)
Internal IGBT gate
IPM overcurrent
detection circuit
5V
0V
IC1
R49 Overcurrent
Shunt resistance
P
N
CiN
FO
24
26
34