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LG
LG
Multi Type Air Conditioner
SERVICE MANUAL
MODEL: L2-H242GL0
L2-C242GL0
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
Multi Air Conditioner Service Manual
TABLE OF CONTENTS
Safety Precautions......................................................................................................................................3
Product Specifications ......................................................................................................................................7
Dimensions ..........................................................................................................................................................9
Refrigeration Cycle Diagram .............................................................................................................................11
Wiring Diagram ...................................................................................................................................................12
Electronic Control Device..................................................................................................................................13
Schematic Diagram ...........................................................................................................................................15
Functions ............................................................................................................................................................18
Operation Details................................................................................................................................................21
2-way, 3-way Valve..............................................................................................................................................28
Cycle Troubleshooting Guide............................................................................................................................32
Electronic Parts Troubleshooting Guide ..........................................................................................................33
Installation ..........................................................................................................................................................41
Operation ............................................................................................................................................................53
Disassembly of the parts (Indoor unit).............................................................................................................55
Exploded View and Replacement Parts List ....................................................................................................58
2 Multi Air Conditioner
Safety Precautions
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions must
be followed.
■ Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
WARNING
This symbol indicates the possibility of death or serious injury.
CAUTION
This symbol indicates the possibility of injury or damage.
■ Meanings of symbol used in this manual are as shown below.
Be sure not to do.
Be sure to follow the instruction.
WARNING
■ Installation
Do not use a defective or
underrated circuit breaker.
Use this appliance on a dedicated circuit.
• There is risk of fire or electric shock.
Install the panel and the cover
of control box securely.
• There is risk of fire or electric shock.
Do not let the air conditioner
run for a long time when the
humidity is very high and a
door or a window is left open.
• Moisture may condense and wet or
damage furniture.
Always install a dedicated circuit and breaker.
• Improper wiring or installation may
cause fire or electric shock
Always ground the product.
• There is risk of fire or electric shock.
Use the correctly rated breaker or fuse.
• There is risk of fire or electric shock.
Service Manual 3
Safety Precautions
Do not modify or extend the
power cable.
• There is risk of fire or electric shock.
For installation, always contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric shock,
explosion, or injury.
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire, electric shock,
explosion, or injury.
Do not install the product on a
defective installation stand.
• It may cause injury, accident, or damage to the product.
Be cautious when unpacking
and installing the product.
• Sharp edges could cause injury. Be
especially careful of the case edges
and the fins on the condenser and
evaporator.
Be sure the installation area
does not deteriorate with age.
• If the base collapses, the air conditioner could fall with it, causing property
damage, product failure, and personal
injury.
■ Operational
Do not touch(operate) the
product with wet hands.
• There is risk of fire or electrical shock.
4 Multi Air Conditioner
Do not place a heater or other
appliances near the power
cable.
Do not allow water to run into
electric parts.
• There is risk of fire and electric shock.
• It may cause There is risk of fire, failure of the product, or electric shock.
Safety Precautions
Do not store or use flammable gas or combustibles near the product.
• There is risk of fire or failure of product.
If strange sounds, or smell or smoke comes
from product. Turn the breaker off or disconnect the power supply cable.
• There is risk of electric shock or fire.
Gasolin
Do not open the inlet grille of the product during operation. (Do not touch the electrostatic
filter, if the unit is so equipped.)
Be cautious that water could not enter the
product.
• There is risk of physical injury, electric shock, or product failure.
• There is risk of fire, electric shock, or product damage.
Service Manual 5
Safety Precautions
CAUTION
■ Installation
check for gas (refrigerant)
leakage after installation or
repair of product.
• Low refrigerant levels may cause failure of product.
Install the drain hose to
ensure that water is drained
away properly.
• A bad connection may cause water
leakage.
Keep level even when
installing the product.
• To avoid vibration or water leakage.
90˚
■ Operational
Use two or more people to lift
and transport the product.
• Avoid personal injury.
Use a soft cloth to clean. Do
not use harsh detergents, solvents, etc.
Do not touch the metal parts
of the product when removing
the air filter. They are very
sharp!
• There is risk of fire, electric shock, or
• There is risk of personal injury.
damage to the plastic parts of the product.
x
Wa Thinner
Do not step on or put anyting on the product.
(outdoor units)
• There is risk of personal injury and failure of product.
6 Multi Air Conditioner
Do not insert hands or other objects through
the air inlet or outlet while the product is operated.
• There are sharp and moving parts that could cause personal
injury.
Product Specifications
Product Specifications
1. L2-C242GL0
Operation
Item
A + B unit
A or B unit
Unit
Cooling Capacity
Btu/h(kcal/h)
12,000(3,517)
24,000(7,034)
Moisture Removal
l/h
1.4
1.4 x 2
Power Source
ø, V, Hz
Air Circulation
m3/min
Noise Level(Hi/Med/Low)
dB(A)
1Ø, 220, 60HZ
Indoor
8.5
Outdoor
42
Indoor
39/35/31
Outdoor
54
Input
W
1,250
2,350
Runnig Current
A
5.8
10.8
Btu/h.w
9.6
10.21
E.E.R.
Motor Output
Dimensions(W x H x D)
Net. Weight
Refrigerant(R-22)
W
mm
kg
Indoor
10.0
Outdoor
90
Indoor
900 x 285 x 156
Outdoor
870 x 655 x 320
Indoor
8
Outdoor
61
g
A: 750, B: 750 (at 7.5m)
Airflow Direction Control(Up & Down)
O
Remocon Type
Service Valve
Drain Hose
L.C.D Wireless
Liquid
1/4"(6.35)
Gas
1/2"(12.7)
O
Plasma Filter
Optional
Connecting Cable
1.5mm2
Power Cord
2.5mm2
Service Manual 7
Product Specifications
2. L2-H242GL0
(Cooling/Heating)
Operation
Item
A + B unit
A or B unit
Unit
Cooling Capacity
Btu/h(kcal/h)
12,000(3,517)
24,000(7,034)
Moisture Removal
l/h
1.4
1.4 x 2
Power Source
ø, V, Hz
Air Circulation
m3/min
Noise Level(Low)
dB(A)
1Ø, 220, 60HZ
Indoor
8.5
Outdoor
42
Indoor
39/35/31
Outdoor
54
Input
W
1,250/1,150
2,300/2,150
Runnig Current
A
5.8/5.3
10.8/9.7
Btu/h.w
9.60
10.43
E.E.R.
Motor Output
Dimensions(W x H x D)
Net. Weight
Refrigerant(R-22)
W
mm
kg
Indoor
10.0
Outdoor
90
Indoor
900 x 285 x 156
Outdoor
870 x 800 x 320
Indoor
8
Outdoor
61
g
A: 730, B: 730 (at 7.5m)
Airflow Direction Control(Up & Down)
O
Remocon Type
Service Valve
Drain Hose
L.C.D Wireless
Liquid
1/4"(6.35)
Gas
1/2"(12.7)
O
Plasma Filter
Optional
Connecting Cable
0.75mm2
Power Cord
2.5mm2
8 Multi Air Conditioner
Dimensions
Dimensions
1. Indoor Unit
H
D
W
Installation plate
MODEL
DIM
L2-C242GL0, L2-H242GL0
W
mm
900
H
mm
285
D
mm
156
Service Manual 9
Dimensions
2. Outdoor Unit
L4
H
L3
L1
L9 L10 L10L10
L2
D
W
L6
MODEL
DIM
L5
L7
L8
L2-C242GL0, L2-H242GL0
W
mm
870
H
mm
655
D
mm
320
L1
mm
370
L2
mm
25
L3
mm
630
L4
mm
25
L5
mm
546
L6
mm
160
L7
mm
160
L8
mm
64
L9
mm
76.5
L10
mm
50
10 Multi Air Conditioner
Gas side
3-Way valve
Liquid side
2-Way valve
Refrigeration Cycle Diagram
Refrigeration Cycle Diagram
1. L2-C242GL0
Indoor Unit
Outdoor Unit
LIQUID SIDE
CAPILLARY TUBE
2-WAY VALVE
HEAT
EXCHANGER
(EVAPORATOR)
A-UNIT
HEAT
EXCHANGER
(CONDENSER)
B-UNIT
COMPRESSOR
B
GAS SIDE
3-WAY VALVE
COMPRESSOR
A
2. L2-H242GL0
Indoor Unit
Outdoor Unit
COMPRESSOR-A
COOLING
HEATING
DEICE
4-WAY
VALVE
3-WAY
VALVE
HEAT
EXCHANGER
COMPRESSOR-B
4-WAY
VALVE
HEAT
EXCHANGER
A-UNIT B-UNIT
CAPILLARY TUBE
2-WAY
VALVE
Gas
Liquid
Max.
piping length
(m)
1/2"
1/4"
15
Pipe Size (Diameter : inch)
CAPILLARY TUBE
Max.
piping elevation
(m)
8
ex)
Capillary
Cooling & Deice
Service Manual 11
Wiring Diagram
Wiring Diagram
Indoor Unit
1. L2-C242GL0
2. L2-H242GL0
BR
CN-TH
THERMISTOR
CN-U/D
CN-AC/DC
TRIAC
OR
MOTOR
DC PWB ASM
CN-AC/DC
AC PWB ASM
BK
STEP
MOTOR
CN-MOTOR
YL
CN-TAB1
SH-CAPA
BR
3 2(N) 1(L)
TO OUTDOOR UNIT
4
RD AIR
H.V.
ASM BK CLEAN
(PLASMA)
BK
SAFETY S/W1
BK
FUSE
250V T2A
3
RY-COMP
BK
BK
SAFETY S/W2
CN-DISP
OPTION
GN/YL
SW(FORCE)
DISPLAY PWB ASM
T/BLOCK
INDOOR WIRING DIAGRAM
3854A20135F
3854A20142F
Outdoor Unit
CAPACITOR
R
S
BR
O.L.P
C COMP
"B"
BL
C
YL
H
S WH
T/B 3
RD
R
BK
COMP
"A"
F
BK
2. L2-H242GL0
CAPACITOR
1. L2-C242GL0
OR
OR
C
GN/YL
O.L.P
BR
BK
T/B 2
RD
BK RD
BL 3 NO
6
RD
1
BL
7 NC
C
POWER
RELAY
8
BL
BK
GN/YL
BK
WH
YL
OR
T/B 4
T/B 1
MOTOR
BK
BK
WH
1(L) 2(N) 3
A-UNIT
3 2(N) 1(L)
B-UNIT
1(L) 2(N)
TERMINAL
BLOCK
MAIN POWER
TO INDOOR UNIT
OUTDOOR WIRING DIAGRAM
12 Multi Air Conditioner
3854A20216C
3854A20135E
Electronic Control Device
Electronic Control Device
Indoor Unit
1. MAIN P.C.B ASSEMBLY(L2-C242GL0)
2. MAIN P.C.B ASSEMBLY (L2-H242GL0)
ROOM PIPE
RESET
+5V
J15
GND
GND
J6
+5V
+5V
GND
+5V
J14
6870A90097A
6871A20266
J13
Service Manual 13
Electronic Control Device
Outdoor Unit
• MAIN P.C.B ASSEMBLY(L2-H242GL0)
Display P.C.B Assembly
14 Multi Air Conditioner
Schematic Diagram
Schematic Diagram
Indoor Unit
1. L2-C242GL0
DC PART
2
AC PART
2
STEPPING MOTOR
(UP/DOWN)
DISPLAY
Operation
1
BL
PK
YL
OR
RD
S/W(FORCE)
R01G~R04G
LED1 220
5
CN-U/D
5
1
2
3
4
3
4
2
6
7
8
CN-DISP1
1
8
7
6
5V
C02L
220uF SD
10V
+
1
2
3
3
1
2
3
12V
7
8
IC01G
KID65004AF
HVB OUT
R11H~R14H
20K 2012
C07D
103
50V
12V
5V
R11H
R12H
R13H
R14H
INDOOR FAN
1
2
3
5
LED2 220
4
LED3 220
5
Sleep
5
Timer
4
LED4 220
4
Outdoor
3
3
1
2
3
1
1
2
2
3
6
3
2
9
1
5V
2
receiver
1
1
1
2
O
IC04D
S78DL05L 1W
I
7805
Option
GND
RECEIVER
2
1
CN-CONT
2
CN-12V
C08D
103
50V
CN-HVB
Vout
Vcc
HVB
5V
+ C09D
220
10V SD
3
A1
A2
1 G
2
COMP
7
6
9
7
6
5
4
3
2
1
8
IC01M
KID65004AF
OJ4H
5V
20K
R02F
5V
1
8
5V
6
4
5V
1
2
3
11
4
5
6
7
8
9
10
12
13
14
15
16
L2
100uH
2
7
Option
2
3
3
4
4
5
5
1
1
BL PK YL OR RD
STEPPING MOTOR
(LEFT/RIGHT)
2
2
3 4 5 6
CN-L/R
7
8
16 15 14 13 12 11 10 9
1
A
V
s
s
B
Z
COMP
5
4
5V
INT
6
3
SMPS
C02D
104
7
2
12V
R02E,20
R22H
R23H
R24H
R25H
R26H
R01T
1K
C03T
102
5V
Q03T
C104S
Q02T
A104S
5V
Q01C
KTC3198-Y
2SC5343
3
2
3.6V
1
Q01T
C104S
R07D
12K
5V
C02T
102
D01T
1N4148
5V
C01T
104
R02L,1K
C01L
680pF/50V
INT
5V
R02H
12.1K
1%
CN-TEL
receiver
CN-TH
R05D
300K
1/4W
3216
D05D
1N4007
D08D
LL4148
DC HIGH
VOLTAGE GND
3
1
R04D
27k
1/8W 2012
5V
R04H
6.2K
1%
R06D
56K
R01L
5.1K
5V
Q04T
A104S
4
6
IC01A
KIA7036P
S7136
R05H
10K
5V
OSC01B
CSTS0800MG03-T2
CRTL8.00MSOT
C01A
0.01
50V
R02A,20K
5V
INT
DC LOW
VOLTAGE GND
IC03D
TLP181(V4 BL)
NTC SCK-102
C01D
4.7uF
450V/SD
R21H
INDOOR FAN
+
INDOOR FAN
R21H~R26H
12.1K, 1%
R01B
1M
5V
5V
BZ01E
PKM13EPY-4002
R01E
1K
8
1
SD01D
STO2D-200
IC01D
TNY266P
DC HIGH
VOLTAGE GND
S 2
BP 1
EN 4
D 5
OR6H OR5H OR4H OR3H OR2H OR1H
Low O/L
Hi
Med
F2
F1
33
36
35
34
38
37
42
41
40
39
44
43
47
46
45
48
IC02M
KID65004AF
AVref
AVdd
RESET
X2
X1
Vss1
INT0
INT1
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
A
V
d
d
1
NEC
UPD780023AGC-C
Vdd0
Vss0
5V
5
INT
D07D
UG2D
C04D
470/35V/SD
+
RY-COMP
+ C02C
220uF
10V/SD
3
6
4
17 18 1920 21 22 23 24 25 26 27 28 29 30 31. 32
12V
DC HIGH
VOLTAGE GND
C05D
472M
IC02D
TLP181(V4 BL)
R03D
39
1/8W 2012
12V
20K
R02P
2012
3
1
OJ3H
20K
R01P
2012
OJ2H
12V
HVB OUT
SCL
WP
Vcc 8
5
A0 SDA
EEPROM
CAT24WC01J
4
OJ1H
CN-ACDC
12V
L1
ZBF503D
CN-ACDC
C06D
330
25V SD
R02D
20K
ZD02D
BZX55C11
DC LOW
VOLTAGE GND
3
3
2
3
4
2
4
1
1
3
2
2
1
1
BD01D
DF08M
R06D
300K
1/4W 3216
ROOM-TH
PIPE-TH
C03J
METAL FILM
100nF/275V/436D
3.9V, 1/2W
2.7 1/2W
R19H
2.7 1/2W
R18H
C05H
A104S
5V
Q04T
A104S
RY-HOOK
ZD05H
TX
C02T
0.001uF
50V
R12H
+
-
4
8
5V
7
0.1uF/50V
C02H
6.2K/1W
6
5
RX
1N4004
D01H~D04H
750
R14H
270
+
1.5KE56A
ZD01H
T1
R02H
6.2K
1/4W
7.5K
T2
3
Q02M
1uF
63V
PC01H
R06H
3
4
TLP621BL
27
5V
D01M
5V
R07H
2K
51K
2
3
C04H
1uF
16V
RA3
MCLR
T0CLK
VSS
RB0
RB1
RB2
RB3
IC-DTMF
HT9170B
DV
EST
RI
RA0
OSC1
18
17
16
15
14
1M
R01B
12 Q1
13 Q0
10 Q3
11 Q2
Q2
DSO
0.1uF
50V
C02X
RB4
RB5
RB6
RB7
VDD
OSC2
5V
15
Q3
DE
Q0
Q1
14
10
11
12
13
100K
R01X
16
17
(ST9170)
VN
18
VDD
GS
VP
VREF
X1
D3
D2
D1
D0
5V
TX
RX
OSC01B
0.01uF
50V
C01X
CST-4.00MGW
AC220~240V
50/60Hz
SH-CAPACITOR
COMPRESSOR
FAN MOTOR
OUTDOOR
INDOOR
FAN
MOTOR
OE
RA1
MICOM
2
3
RA2
PIC16C54CR
10K
1
OP1
OP2
10K
4
5
7
6
8
1
3
4
7
VSS
NC
NC
X2
N
L
1(L)
2(N)
9
6
5
8
9
DE
5V
1
2
DSO
R17H
R08H
100K
RST
DE
BD
R01M
Q01M
C3198Y
R16H
100K
OSC02B
CST-3.58M
4.7K
1N4004
5V
3
2
2
2
1
1
1
1
1
CN-TAB1
T-BLOCK
CN-MOTOR
KIA7036P
IC01A
C09H
2
1
KTC2016
4.7K
R04H
Q03M
2
27
R05H
2222A
+
1
3.6V
3
RY-COMP
G4A-1A-E-LG
4
TRAICS
SM1L43
R03J
680
1/2W
100
R03A
4.7K
R02A
5.1V, 1/2W
4
5
TR01J
ZNR02J
TVR10561
T1
FUSE
250V/T2A
ZNR01J
TVR10561
TRANS
R03H
C03H
22uF
50V
0.1uF
50V
ZD02H
50V
10uF
C01A +
1K
R01A
ZD02H~ZD03H
ZD03H C11H
R13H
RST
3
2
1
IC01J
TLP762JF
C08H
0.15uF
63V
R02J
100,1/2W
R04J
560
1/4W 3216
LM358
OP-AMP
1K
R01H
1uF DC250V
C01H
OPTION
5V
0.1uF/50V
C06H
HR93F,5V
G6A-234P,5V
ZD04H
BSP351L
ZNR01
R15H
10K
1K
5V
1K
R01T
Q03T
NF01J
15mH/1A
C01J
METAL FILM
100nM/275V/436D
R01J
120, 1/2W
INDOOR FAN
12V
C104S
Q01T
R09H
0.01uF
100V
100uF/25V
C01D
BD
5V
ZD04H~ZD05H
TELE
2
1
+
CN-PHONE
CN-TELE
3
2
1
C104S
Q02T
C01T
0.001uF
50V
D01T
1N4148
C02J
METAL FILM
47nM/275V/435D
Service Manual 15
NC
STEP MOTOR
LEFT/RIGHT
BL
PK
YL
OR
RD
BL
PK
YL
OR
RD
ROOM-TH
PIPE-TH
STEP MOTOR
UP/DOWN
COM
NO
2
3
3
3
4
3
4
5
4
5V
0.01
50V
5V
7805
I
C07D
103
50V
12V
DC LOW
VOLTAGE GND
3
1
R03D
39
1/8W
ZD02D
BZX55C11
R02D
20K
C06D
330
25V
L1
ZBF503D
Q01C
KRC106S
R01C,1K
R02C,4.7K
R01L,1K
OP6
C01L
680pF
50V
BZ01E
R01E,1K
R02E,20
R18H
10K
12.1K
10K
1%
R16H
R17H
R02L,10K
Q01M
KRC106S
M
C02C
0.015
50V
IC04D
7805
C08D
103
50V
O
1
2
3
4
5
6
7
C01Z
0.01
50V
R01Z,1K
8
IC01M
KID65004AP
16
15
14
13
12
11
10
9
C02H
0.01
50V
1%
C01H
1%
6.2K
R04H
AC PART
R05C
4.7K
C09D
220
10V
+
R02H
12.1K
DC12V
10K
R02Z
REMOCON
5V
INT
D01M
DC 12V
CN-U/D
CN-L/R
5
4
2
3
2
1
5
4
3
2
3
1
5
4
3
2
1
2
2
1
1
1
CN-TH
1
2
CN-SW
1
5V
5V
OP4
D07D
UG2D
IC02D
TLP181
C05D
472M
4
6
C04D
470/35V
+
C02D
104
SMPS
IC01A
S 2
BP 1
EN 4
D 5
5V
12V
CN-ACDC
DC12V
5V
INT
R03H,1K
2
2
1
IC01D
TNY266P
C01D
4.7uF
450V
+
3
3
5
5
D6
R55/BUZ
15
6
6
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
7
7
VSS
8
8
XOUT
XIN
RESET’
R40/INT0
R41/INT1
R42/INT2
R43/INT3
R44/EC0
R45/EC2
R46/T10
R47/T30
R50/Sin
R51/Sout
R52/Sclk
R53/Srdy
4
6
5V
3
1
R04D
27k
1/8W 2012
A16 R27 33
A15 R26 34
A14 R25 35
A13 R24 36
A12 R23 37
A11 R22 38
D08D
1N4148
R06D
300K
1/4W
R05D
300K
1/4W
BD01D
DF08M
Rx(Outdoor)
Tx(Outdoor)
FAN_MOTOR
FAN_MOTOR
Tx
Rx
D05D
1N4007
R20 40
R17 41
R16 42
R15 43
R14 44
R13 45
R12 46
R11 47
R10 48
R07 49
R06 50
R05 51
R04 52
R03 53
R02 54
A10 R21 39
A8
A7
A6
A5
A4
A3
A2
A1
A0
D7
D5
R54/WDTO
D4
D3
R56/PWM0
R60/AN0
D2
D1
R62/AN2
R61/AN1
R00 56
D0
R63/AN3
R01 55
HALT R37 57
R57/PWM1
16
R34 60
R33 61
BRQ R36 58
14
13
12
C
BRK R35 59
SYNC
R64/AN4
R65/AN5
R66/AN6
R67/AN7
AVref
NTC SCK-102
R01B,1M
IC03D
TLP181
4
4
CST-8.00MTW
OSC01B
C01A
0.01
50V
R01A,1K
1
+
RX
TX
AIR_CLEAN
R01H,1K
11
10
9
8
7
6
5
4
R31 63
Wt
R32 62
R30 64
RD
3
R/W
MP
2
0.01
50V
AVss
Vdd
1
C01M
SD01D
STO2D-200
C02A
10uF/50V
R03A,150
OP1
12.1K
R11H
R02A,4.7K
OP2
12.1K
R12H
KIA7036P
OP3
12.1K
R13H
C03D
680pF
C01C
0.01
25V
OP5
12.1K
12.1K
1%
R14H
R15H
C01F,0.01/50V
4
3
2
1
C02F,0.01/50V
C02J
METAL FILM
47nM/275V
TXD(Outdoor)
RXD(Outdoor)
DU
VCC
R01K
10K
560
DC 5V
R02K,1K
6 ORG
Vss
5
7
8
R04J
Q01K
KRC102S
C01K
0.001
25V
FAN_MOTOR
12V
Q
D
C
S
AIR_CLEAN
IC02M
4
3
1
2
T1
ZNR02J
TNR561
T2
R03K
1K
C02L
D02K
1SR139-600
C04J
0.01uF,AC275V
100nF/275V
C03J
R01J
120,1/2W
DC 5V
DC 12V
220uF
16V
DC 5V
ZNR01J
TVR10561
FUSE
250V/T2A
R05K
15K,3W
(82K,3W)
ZNR01K
14D271
TRAICS
SM1L43
D01K
1SR139-600
TR01J
R03J
680, 1/2W
DC 12V
REMOCON
DC 5V
FAN_MOTOR
R04G,220
R02G,220
R07G,220
R01G,220
R02F,10K
C01J
METAL FILM
100nM/275V
IC02K(TLP627)
(TLP127)
1
2
4
3
NF01J
15mH/1A
R04K
680
4
5
9
10
11
12
13
14
15
16
R02T,10K
IC01K(TLP621)
(TLP181)
R02J
100,1/2W
3
2
1
IC01J
TLP762JF
8
7
6
5
4
3
2
1
KID65004AP
R01T,10K
LIMIT SWITCH
EEPROM
R04F,10K
R03T,10K
5V
R04T,10K
R01F,1K
R05T,10K
16 Multi Air Conditioner
2
1
2
1
5
6
7
5
6
7
9
8
7
6
5
4
3
2
CN-SUB
9
8
7
6
5
4
3
2
1
4
4
1
2
3
2
1
1
3
8
8
CN-DISP1
3
1
2
4
5
1
2
4
5
1
1
T-BLOCK
2
2
3
3
CN-Airclean
3
CN-MOTOR
MICOM
GMS81516
L
N
C
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
9
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
9
INDOOR
FAN
MOTOR
8
8
102
C01S
1K
R01S
Bit2
Bit0
10K
R02S
TACT S/W
REMO
HVB
SH-CAPACITOR
Option
3
2
1
10K
R03S
3
2
C
B
D
E
10K
R06S
5
6
20
9 8 7
6
2
R04S
F 0 1
4
8
1
A
7
4
8
5
4
3
4
5
6
Bit1
Bit3
10K
R07S
10K
R05S
DC 12V
DC 5V
DC 12V
DISPLAY_PCB
Vcc
Vout
GND
SUB_PCB
DC 12V
3
2
1
3
2
1
CN-SUB
9
8
7
6
5
4
3
2
1
3
2
1
3
2
1
Telecontrol
Schematic Diagram
2. L2-H242GL0
Schematic Diagram
Outdoor Unit
• L2-H242GL0
2
4
3
2
1
4
2
1
3
2
3
1
3
1
CN-TH1
B TH
A TH
C TH
CN-TH2
DC 5V
12
11
9
4
5
6
8
R02H
6.2K
1%
R04H
6.2K
1%
C01H~C03H
0.01
25V
IC02M(KID65004AP)
13
R06H
12.1K
1%
R01H,1K
R03H,1K
8
7
6
5
4
3
2
34
35
36
37
38
39
40
41
42
9
1
R05H,1K
P77
3
P73
P74
P75
2
14
IC01M
15
8
P76
6
7
1
9
16
10
P72
11
P71
P70
5
P07
4
3
12
2
13
14
31
33
30
32
12
29
10
13
28
11
14
27
25
15
24
16
RESET
26
XOUT
17
22
23
18
(VASS)VSS
XIN
19
20
21
MICOM
TMP87C846
DC 5V
5V
R01C
C10D
103
10K
C11D
0.01
25V
DC 5V
CAPA.
0.01
25V
TEST S/W
DC 5V
R01M,R02M
10K
VDD
P22
P21
P20
P17
P16
P15
P14
P13
P11
P12
P10
P67
P66
P65
P64
P63
P62
P61
P60
VAREF
L02D
DC 12V
RY-BP4
RY-4WAY(A)
RY-4WAY(B)
RY-SV4
RY-SV3
RY-SV2
RY-SV1
RY-BP2
RY-BP1
15
P05
RY-COMP(B)
R01G,1.5K
P04
P06
L1(SV1)
P03
P02
R02G,1.5K
1
DC5V
L2(SV2)
P01
TEST
P00
R04G,1.5K
C01A
0.01
25V
R01A,1K
R05G,1.5K
L3(SV3)
3
R03A,100
R02A,4.7K
L4(SV4)
1
7036P
C02A
10
50V
R01B,1M
L5(SV5)
R03G,1.5K
16
RY-LOW
(RY-SV5/HBP1)
RY-HI
+
RY-COMP(A)
DC 5V
IC01A
2
OSC01B
CST8.00MGW
100nH
5V
G
C08D
104
IC03D
KID78L05BP
O
I
7805
C09D
220uF/50V
C01K
0.001
25V
Q01K
KRC107M
C02K
0.001
25V
Q02K
KRC107M
C03K
0.001
25V
Q03K
KRC107M
C04K
0.001
25V
Q04K
KRC107M
C06K
0.001
25V
Q05K
KRC107M
39
R04D
3.3uH
L01D
12V
C04H-05H
0.01,25V
C07D
330uF/35V
R03D
150
ZD02D
11V
DC 5V
R01K,1K
R05K,1K
R09K,1K
R13K,1K
R17K,1K
R02K
10K
3
4
2
1
4
3
IC01K(TLP621/421)
2
R04K
1K
1
3
1
2
IC02K(TLP627)
4
3
IC01K(TLP621/421)
4
3
1
2
IC04K(TLP627)
2
R08K
1K
1
4
IC01K(TLP621/421)
3
4
3
1
2
IC06K(TLP627)
2
R12K
1K
1
4
IC01K(TLP621/421)
3
4
3
1
2
IC08K(TLP627)
2
R16K
1K
1
4
IC09K(TLP621/421)
3
4
S
3,7,8
R03K
1.5K
D01K
1SR139-600
R07K
1.5K
D02K
1SR139-600
R11K
1.5K
D03K
1SR139-600
R15K
1.5K
D04K
1SR139-600
R19K
1.5K
DC 5V
D12K
1SR139-600
ST02D-170
(UF4005)
DC310V
OR1H
XXX
R07H
12.1K
1%
IC10K(TLP627)
2
R20K
1K
1
R08H
12.1K
1%
3
1
OR2H
XXX
C03D
104
D
D02D
5
EN
4
TNY
IC01D
266P
TNY266P
1 2
BP
S/Trans
OR3H
XXX
R01F
12.1K
1%
R18K
10K
R14K
10K
R10K
10K
R06K
10K
C05D
681
6,7
4,5
D03D
SB360
C06D (UF5402)
470uF/35V
IC02D(TLP521)
C04D
472/250VA
C02J
100nF
R01J
D01D
1N4007 1M,1/2W 275V
NTC01D
100D-9
C01D
15uF/
450V
R22K
82K,3W
R21K
82K,3W
D06K
1SR139-600
D05K
1SR139-600
D08K
1SR139-600
D07K
1SR139-600
D11K
1SR139-600
7
8
9
4
5
6
7
8
9
1
3
2
1
3
6
2
2
1
4
5
3
3
3
3
2
2
1
RY-4WAY3
2
1
RY-FAN
OUT-A
RY-4WAY4
1
RY-BP1
1
2
1
4
2
4
3
RY-SV1
2
3
3
1
3
2
1
RY-SV2
1
2
2
1
3
2
RY-SV3
RY-COMP(B)
2
CN-COM
A ROOM
B ROOM
C ROOM
D ROOM
BYPASS1
BYPASS2
SV1
SV2
NEUTRAL
LIVE
COMP B
COMP A
CN-COMP
SV4/4WAY2
SV3/4WAY1
CN-SV
CN-BYPASS
HBYPASS2
4WAY4
4WAY3
FAN1
CN-FAN
D ROOM
CN-POWER
3
1
C01J
100nF
275V
RY-SV4
1
3
ZNR01J
INR14D561K
INR14D471K
1
RY-BP2
RY-FAN
OUT-B
(SV5)
RY-BP4
RY-COMP(A)
R24K
82K,3W
R23K
82K,3W
FUSE
250V/T3.15A
R28K
82K,3W
NF
NF01J
15mH/1A
2
4
Service Manual 17
Functions
Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
• Room temperature sensor. (THERMISTOR)
Room temperature control
• Maintains the room temperature in accordance with the Setting Temp.
Starting Current Control
• Indoor fan is delayed for 5 seconds at the starting.
Time Delay Safety Control
• Restarting is inhibited for approx. 3 minutes.
Indoor Fan Speed Control
• High, Med, Low, Chaos
Operation indication Lamps (LED)
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Deice Mode(for Heat pump model)
OUT
DOOR
--- Lights up in Compressor operation(for Cooling model)
Health Dehumidification Operation
• Intermittent operation of fan at low speed.
Sleep Mode Auto Control
• The fan is switched to low(Cooling), med(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
Natural Air Control by CHAOS Logic
• The fan is switched to intermittent or irregular operation
• The fan speed is automatically switched from high to low speed.
Airflow Direction Control
• The louver can be set at the desired position or swing
up and down automatically.
18 Multi Air Conditioner
Deice (defrost) control (Heating)
• Both the indoor and outdoor fan
stops during deicing.
• Hot start after deice ends.
Hot-start Control (Heating)
• The indoor fan stops until the
evaporator piping temperature will be
reached at 22°C.
Functions
Remote Controller
Operation ON/OFF
Operation Mode Selection
Cooling Operation Mode.(
(Cooling
(Heating
model only) model only)
)
Auto Operation Mode.(
Healthy Dehumidification Operation Mode.(
) Heating Operation Mode.(
)
)
Fan Speed Selection
(Low)
(Med)
(High)
(CHAOS)
Room, Temperature Display
: (High:39°C
Low:11°C)
Temperature Setting
TEMPERATURE
LOW
HIGH
Down to 18°C
Up to 30°C
Cooling
Heating
Down to 16°C
Up to 30°C
JET COOL
PLASMA(Option)/NEGATIVE ION(Option)
PLASMA
Setting the Time or Timer
Timer Selection
ON
OFF
Timer Setting
SET
: OFF, ON, OFF
ON
Timer Cancel
CANCEL
Sleep Operation
: Cancel Sleep Mode, Timer ON or Timer OFF
Airflow Direction Control
: 1, 2, 3, 4, 5, 6, 7, Off Timer
Fan Operation Mode
: Fan Operates without cooling or heating.
Horizontal Airflow Direction Control Button(Option)
Reset
Service Manual 19
Display Function
Display Function
1. Heating Model
2. Cooling Model
Operation Indicator
Operation Indicator
• Cooling, Soft Dry, Fan, Heating
Sleep Timer Indicator
• Cooling, Soft Dry, Fan
Sleep Timer Indicator
• Sleep Mode
• Sleep Mode
Timer Indicator
Timer Indicator
• Timer Mode
• Timer Mode
Compressor on Indicator
Defrost Indicator
OUT
DOOR
• Hot-start, Defrost
Self-diagnosis Function
■ Error Indicator
• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.
• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.
• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.
• After error occurrence, if error is released, error LED is also released simultaneously.
• To operate again on the occurrence of error code 12, be sure to pull out power cord and then re-insert.
• Having or not of error code is different from Model.
Error
Code
Error LED
(Indoor body operation LED)
(once)
1
3sec
3sec
3sec
2
3sec
(3times)
3
3sec
• Indoor suction temperature
thermistor open/short.
• Indoor pipe temperature
thermistor open/short.
SVC check point
• Indoor TH ass'y check
• Outdoor suction temperature
thermistor open/short.
• Outdoor TH ass'y
• Outdoor pipe temperature
check
thermistor open/short.
(twice)
3sec
Error contents
3sec
• Abnormal operation of multi
product.
• Resetting of remocon
(Simultanueous operation of operating mode
cooling and heating)
(5times)
5
• Poor communication
• Communication
line/circuit check
• Indoor fan lock
• Check indoor fan
motor and outdoor
PCB ass'y
3sec
8
20 Multi Air Conditioner
Operation Details
Operation Details
Main Unit Function
1) C/O Model
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled.
Comp. Running Incidator
• While in appliance operation, on while in outdoor unit compressor running, off while in compressor off
2) H/P Model
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled
Defrost Indicator
• Off except when hot start during heating mode operation or while in defrost control
■ Cooling Mode Operation
• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.
• When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp
➲ Setting Temp+0.5°C
Compressor OFF Temp
➲ Setting Temp-0.5°C
• While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.
■ Healthy Dehumidification Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C ≤ Intake Air Temp
➲ 25°C
24°C ≤ Intake Intake Air Temp<26°C
➲ Intake Air Temp-1°C
18°C ≤ Intake Intake Air Temp<24°C
➲ Intake Air Temp-0.5°C
Intake Air Temp<18°C
➲ 18°C
Service Manual 21
Operation Details
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat.
Compressor ON Temp.
➲ Setting Temp+0.5°C
Compressor OFF Temp. ➲ Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■ Heating Mode Operation(H/P model)
• When the intake air temp reaches +3°…above the setting temp, the compressor is turned off. When below
the setting temp, the compressor is turned on.
Compressor ON Temp.
➲ Setting Temp.
Compressor OFF Temp. ➲ Setting Temp.+3°C
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it
operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it operates with Super-Low(while in sleep mode, with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C, when above 35°C , it
operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the
outdoor fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
■ Defrost Control(H/P model)
• Defrost operation is controlled by timer and sensing temperature of outdoor pipe.
• The first defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed from
starting of heating operation and more than 10 minutes operation of compressor.
• Defrost ends after 9/6 minutes passed from starting of defrost operation or after the outdoor fan operates
within max. 2 minutes 30 seconds when the outdoor pipe temperature rises over 12°C even it before 12 minutes.
• The second defrost starts only when the outdoor pipe temperature falls below -6°C after 45 minutes passed
from ending of the first defrost and more than 10 minutes operation of compressor.
■ Cooling overload
• Control indoor fan by sensing outdoor pipe temperature.
• One step down from setting fan speed if pipe temperature is oven 50°C and if below 45°C, operate on setting
temperature.
• One of the outdoor fan is OFF if pipe temperature is below 0°C and outdoor fan is ON if pipe temperature is
over 0°C.
■ Heating overload(H/P models)
• Outdoor fan ON/OFF by sensing outdoor pipe temperature.
• Outdoor fan is OFF if pipe temperature is over 6.5°C and outdoor fan is ON if pipe temperature is below 0°C.
• Outdoor fan is off if any one part is heating overload condition.
22 Multi Air Conditioner
Operation Details
■ Fuzzy Operation (C/O Model)
• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C or more below the setting
temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp
➲ Setting Temp + 0.5°C
Compressor OFF Temp
➲ Setting Temp + 0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C ≤ Intake Air Temp
➲ 25°C
24°C ≤ Intake Air Temp < 26°C
➲ Intake Air Temp + 1°C
22°C ≤ Intake Air Temp < 24°C
➲ Intake Air Temp + 0.5°C
18°C ≤ Intake Air Temp < 22°C
➲ Intake Air Temp
Intake Air Temp<18°C
➲ 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the
temperature.
■ Fuzzy Operation (H/P Model)
• When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since
the operation off, the operation mode is selected.
• When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only
the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air
temp at that moment as follows.
24°C ≤ Inatake Air Temp
➲ Fuzzy Operation for Cooling
21°C ≤ Inatake Air Temp<24°C
➲ Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C
➲ Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
1) Fuzzy Operation for Cooling
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
Compressor ON Temp
➲ Setting Temp +0.5°C
Compressor OFF Temp
➲ Setting Temp + 0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C≤ Intake Air Temp
➲ 25°C
24°C≤ Intake Air Temp<26°C
➲ Intake Air Temp + 1°C
22°C≤ Intake Air Temp<24°C
➲ Intake Air Temp + 0.5°C
18°C≤ Intake Air Temp<22°C
➲ Intake Air Temp
Intake Air Temp<18°C
➲ 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
Service Manual 23
Operation Details
2) Fuzzy Operation for Dehumidification
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below
the setting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor
is turned on.
Compressor ON Temp
➲ Setting Temp + 0.5°C
Compressor OFF Temp
➲ Setting Temp+0.5°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C ≤ Intake Air Temp
➲ 25°C
24°C ≤ Intake Air Temp<26°C
➲ Intake Air Temp+1°C
22°C ≤ Intake Air Temp<24°C
➲ Intake Air Temp+0.5°C
18°C ≤ Intake Air Temp<22°C
➲ Intake Air Temp
Intake Air Temp<18°C
➲ 18°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in
dehumidification operation.
3) Fuzzy Operation for Heating
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 3°C or more above
the setting temp, the compressor is turned off. When below the setting temp, the compressor is turned on.
Compressor ON Temp
➲ Setting Temp
Compressor OFF Temp
➲ Setting Temp + 3°C
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
20°C≤Intake Air Temp
➲ Intake Air Temp + 0.5°C
Intake Air Temp<20°C
➲ 20°C
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is set to the high or the medium according to the
intake air temperature and the setting temperature.
■ Airflow Speed Selection
• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow
speed selection key on the remote control.
■ On-Timer Operation
• When the set time is reached after the time is input by the remote control, the appliance starts to operate.
• The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached.
• If the appliance is operating at the time set by the timer, the operation continues.
24 Multi Air Conditioner
Operation Details
■ Off-Timer Operation
• When the set time is reached after the time is input by the remote control, the appliance stops operating.
• The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached.
• If the appliance is on pause at the time set by the timer, the pause continues.
■ Off-Timer <=> On-Timer Operation
• When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is
carried out according to the set time.
■ Sleep Timer Operation
• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appliance operation, the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature
increases by 1°C. After another 30 min elapse, it increases by 1°C again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to
the low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to
the medium.
■ Chaos Swing Mode
• By the Chaos Swing key input, the upper/lower vane automatically operates with the Chaos Swing or they are
fixed to the desired direction.
• While in Chaos Swing mode, the angles of cooling and heating cycle operations are different.
■ Chaos Natural Wind Mode
• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the airflow mode is operated for 2~15 sec. randomly by the Chaos Simulation.
■ Jet Cool Mode Operation (C/O Model)
• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then
operated in order that the air outflow could reach further.
■ Jet Cool Mode Operation (H/P Model)
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input. When it is input while in the other
mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then
operated in order that the air outflow could reach further.
Service Manual 25
Operation Details
■ Forced Operation
• Operation procedures when the remote control can't be used.
• The operation will be started if the power button is pressed.
• If you want to stop operation, re-press the button.
Cooling Model
Operating mode
Indoor FAN Speed
Setting Temperature
Heat pump Model
Room Temp. ≥ 24°C 21°C ≤ Room Temp. < 24°C Room Temp. < 21°C
Cooling
High
22°C
Cooling
High
22°C
Healthy Dehumidification
High
23°C
Heating
High
24°C
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times
to indicate the forced operation.
■ Test operation
• During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room
temperature and resets in 18±1 minutes.
• During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, open the front panel upward and Press the power button let it be pressed
for about 3 seconds.
• If you want to stop the operation, re-press the button.
■ Auto restart
• In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate procedures automatically to the previous operating conditions.
■ Air Cleaner Operation
• When an air cleaner function is selected during Air Conditioner operation
- Plasma air cleaner function will be operated while in any operation mode with selecting the function.
- The function is to be stopped while it is operating with selecting the function.
• When an air cleaner function is selected during operation off
- The function will be only operated.
• When inlet grille of air conditioner is opened during plasma operation, High Voltage Generator(H.V.B) is to
be stopped. When inlet grille of air conditioner is closed during plasma operation, High Voltage
Generator(H.V.B) will be operated again.
26 Multi Air Conditioner
Operation Details
■ Remote Control Operation Mode
• When the remote control is selected by the slide switch on the main unit, the appliance operates according to
the input by the remote control.
■ Protection of the evaporator pipe from frosting
• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cooling cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor
evaporator pipe from frosting.
• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the
outdoor fan is turned on according to the condition of the room temperature.
■ Buzzer Sounding Operation
• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.
• When the appliance-pause key is input by the remote control, the long "beep—" sounds.
• When a key is input by the remote control while the slide switch on the main unit of the appliance is on the
forced operation position, the error sound "beep-beep-beep-beep-beep-" is made 10 times to indicate that the
remote control signal cannot be received.
Service Manual 27
2-way, 3-way Valve
2-way, 3-way Valve
2-way Valve (Liguid Side)
3-way Valve (Gas Side)
Valve cap
Flare nut
Hexagonal wrench
(4mm)
Open position
Closed position
To
piping
connection
Flare nut
Open position
Closed position
Pin
To
piping
connection
To outdoor unit
Service Service
port cap port
To outdoor unit
Works
Shaft position
Shaft position
Service port
Shipping
Closed
(with valve cap)
Closed
(with valve cap)
Closed
(with cap)
Air purging
(Installation)
Open
(counter-clockwise)
Closed
(clockwise)
Open
(push-pin or with
vacuum pump)
Operation
Open
(with valve cap)
Open
(with valve cap)
Closed
(with cap)
Pumping down
(Transfering)
Closed
(clockwise)
Open
(counter-clockwise)
Evacuation
(Servicing)
Open
Open
3.
Open
(with charging
cylinder)
Open
Open
4.
Gas charging
(Servicing)
Open
(with charging
cylinder)
Pressure check
(Servicing)
Open
Open
5.
Open
(with charging
cylinder)
Gas releasing
(Servicing)
Open
Open
6.
Open
(with charging
cylinder)
1.
2.
28 Multi Air Conditioner
Open
(connected
manifold gauge)
2-way, 3-way Valve
(1) Pumping down
Liquid side
Indoor unit
2-Way
valve
Close
Outdoor unit
Gas side
3-Way
valve
Open
manifold gauge
Low-handle
(CLOSE)
Hi- handle
(CLOSE)
• Procedure
1. Confirm that both the gas side and liquid side
valves are set to the open position.
- Remove the valve stem caps and confirm that
the valve stems are in the raised position.
- Be sure to use a hexagonal wrench to operate
the valve stems.
2. Operate the unit for 10 to 15 minutes.
3. Stop operation and wait for 3 minutes, then connect the manifold gauge to the service port of
the gas side valve.
- Connect the hose of the gauge with the push
pin to the service port.
6. Operate the air conditioner at the cooling cycle
and stop it when the gauge indicates 1kg/cm g.
2
7. Immediately set the gas side valve to the closed
position.
- Do this quickly so that the gauge ends up indig.
cating 1kg/
8. Disconnect the charge set, and mount the liquid
side and gas side valve caps and the service
port nut.
- Use torque wrench to tighten the service port
nut to a torque of 1.8kg.m.(4.2kg*m/5.5kg*m)
- Be sure to check for gas leakage.
4. Air purging of the charge hose.
- Open the Low-handle valve on the gauge
slightly to air purge from the hose.
5. Set the liquid side valve to the closed position.
Service Manual 29
2-way, 3-way Valve
(2) Evacuation
(All amount of refrigerant leaked)
Indoor unit
Liquid side
2-Way
valve
Close
Outdoor unit
Gas side
3-Way
valve
Open
manifold gauge
Vacuum pump
Lowhandle
(OPEN)
Hi- handle
(CLOSE)
• Procedure
1. Confirm that both the liguid side valve and gas
side valve are set to the opened position.
2. Connect the vaccum pump to the center hose of
the manifold gauge.
3. Connect the service port of the gas side valve to
the low side of the gauge.
4. Connect power supply to outdoor unit.
5. Evacuation for approximately one hour.
- Confirm that the gauge needle has moved
toward-76 cmHg (vacuum of 4 mmHg or less).
6. Close the Low handle of the gauge turn off the
vacuum pump, and confirm that the gauge needle does not move(approximately 5 minutes
after turning off the vacuum pump).
30 Multi Air Conditioner
7. Disconnect the charge hose from the vacuum
pump.
- Vacuum pump oil.
If the vacuum pump oil becomes dirty or depleted,replenish as needed.
8. Mount the valve caps and the service port caps.
2-way, 3-way Valve
(3) Gas Charging
(After Evacuation)
Liquid side
Indoor unit
2-Way
valve
Close
Outdoor unit
Gas side
3-Way
valve
Charging
cylinder
Open
manifold gauge
Low-handle
Check valve (OPEN)
Hi- handle
(CLOSE)
• Procedure
1. Connect the gauge to the charging cylinder.
- Connect the charge hose which you disconnected from the vacuum pump to the valve at the
bottom of the cylinder.
- If you are using a gas cylinder, also use a scale
and reverse the cylinder so that the system can
be charged with liquid.
2. Purge the air from the charge hose.
- Open the valve at the bottom of the cylinder and
press the check valve on the charge set to purge
the air. (Be careful of the liquid refrigerant). The
procedure is the same if using a gas cylinder.
3. Open the low handle on the gauge and charge
the system with liquid refrigerant.
- If the system can not be charged with the specified amount of refrigerant, it can be charged
with a little at a time (approximately 150g each
time) while operating the air conditioner in the
cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then
repeat the procedure(pumping down-pin).
4. Immediately disconnect the charge hose from
the gas side valve's service port.
This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.
- Stopping partway will allow the gas to be discharged.
- If the system has been charged with liquid
refrigerant while operating the air conditioner
turn off the air conditioner before disconnecting
the hose.
5. Mount the valve stem nuts and the service port
nut.
- Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.(4.2kg.m/5.5kg.m.)
- Be sure to check for gas leakage.
Service Manual 31
Cycle Troubleshooting Guide
Cycle Troubleshooting Guide
Trouble analysis
1. Check temperature difference between intake and discharge air and operating current.
Temp. difference
Current
: approx. 0°C
: less than 80% of
rated current
All amount of refrigerant leaked out.
Check refrigeration cycle.
Temp. difference
Current
: approx. 8°C
: less than 80% of
rated current
Refrigerant leakage
Clog of refrigeration cycle
Defective compressor
Temp. difference
Current
: less than 8°C
: over the rated
current
Temp. difference
: over 8°C
Temp. Difference
Operating Current
Excessive amount of refrigerant
Normal
Notice:
Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.
2. Check temperature and pressure of refrigeration cycle.
Suction pressure
(Compared with
the normal value)
Temperature
(Compared with
the normal value)
High
Cause of Trouble
Description
Defective compressor
Defective 4-way reverse valve
Current is low.
Excessive amount of
refrigerant
High pressure does not quickly
rise at the beginning of operation.
Insufficient amount of
refrigerant(Leakage)
Clogging
Current is low.
Higher
Normal
Lower
Higher
Current is low.
Notice:
1. The suction pressure is usually 4.5~6.0 kg/cm G at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.
2
32 Multi Air Conditioner
Electronic Parts Troubleshooting Guide
Electronic Parts Troubleshooting Guide
1. The Outdoor Unit does not operate at all
(* Refer to Electronic Control Device drawing and Schematic diagram.)
Turn off Main Power
(After 10 seconds)
Turn on Main Power
Does "beeping" sound is made from the Indoor Unit?
YES
NO
Check the voltage of power(About AC 220V/AC240V, 50Hz)
Primarily, the operating condition of Micom is OK.
• Main power's voltage
• Voltage applied to the unit
• Connecting method of Indoor/Outdoor connecting
cable
• Check Fuse (Outdoor PCB Ass'y)
• Check Varistor
ZNRØ1J(Outdoor PCB Ass'y)
Check each load(Indoor/Outdoor Fan Motor,
Compressor, Stepping Motor etc.) and contacting
condition of related connector
Check the connection housing for contacting
• Connector related to CN-POWER
• Display PWB Ass'y Check
PCB Board Operation Check
Content
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
Remedy
- About AC220V/240V±10% - Check the power voltage
- About AC14±3V
• Replace Trans
• DC +12V
• IC01D(7812) Output
(Indoor/Outdoor unit)
• Replace IC01D
• DC +5V
• IC02D(7805) Output
(Indoor/Outdoor unit)
• IC01A(KIA7036, Reset IC)
X01(8MHz)
• Replace IC02D
• Voltage of Micom No. 2,
(DC +4.5V over) and Soldering condition.
• Replace faulty parts
Service Manual 33
Electronic Parts Troubleshooting Guide
2. The product is not operate with the remote controller.
Turn on Main Power
While the compressor has been stopped, the compressor does not
operate owing to the delaying function for 3 minutes after stopped.
When the compressor stopped Indoor Fan is driven by a low speed.
At this point the wind speed is not controlled by the remote controller.
(When operated in the Sleeping Mode, the wind speed is set to the
low speed by force.)
Cause by the remote control
When the mark(
battery.
) is displayed in LCD screen, replace
When the detect switch(double key) inside the remote
controller door is fault, it is impossible to operate
temperature regulating(▲/▼) and wind speed selecting.
Check the connecting circuit between the remote controller MICOM (No. ) - R17(2Ω) - IR LED - Q1 R16(2.2KΩ).
34 Multi Air Conditioner
Caused by other parts except the remote control
Check the contact of CN-DISPI connector.
Check DISP PWB Ass'y
- Voltage between CN DISP1 ① - ⑦ : DC +5V
Check point
• Check the connecting circuit between PIN ②R01L(1K) - C01L(680PF) - MICOM PIN
• Check Receiver Ass'y
Electronic Parts Troubleshooting Guide
3. When cooling does not operate
Turn on Main Power
Operate "Cooling Mode( )" by setting the desired temperature of the
remote controller is less than one of the indoor temperature by 1°C at least.
When in Air Circulation Mode, Compressor/Outdoor Fan is stopped.
Check the sensor for indoor temperature is attached as close as to be
effected by the temperature of Heat Exchanger(EVA).
When the sensor circuit for indoor temperature and connector are in bad
connection or are not engaged, Compressor/Outdoor Fan is stopped.
• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),
R03H(1.0K) (Indoor unit).
• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 25°C).
Check Relay(RY - COMP) for driving compressor.
• When the power(About AC220V/240V) is applied to the connecting wire
terminal support transferred to compressor, PWB Ass'y is normal.
• Check the circuit related to the relay.
Check point
Between two pin of DC
part in relay for COMP
COMP ON
COMP OFF
Below DC 1V
(app)
About DC12V
Check Outdoor Unit
Service Manual 35
Electronic Parts Troubleshooting Guide
4. When indoor Fan does not operate
Turn off Main power
Check the connection of CN-FAN or CN-MOTOR
Check the Fan Motor
Check the Fuse(AC250V/T2A)
Check the related circuit of indoor Fan Motor.
• The pin of Micom, and the part for driving SSR
• Check the pattern
• Check the SSR
- SSR Open: Indoor Fan Motor never operate
- SSR short: Indoor Fan Motor always operates in case of ON or OFF.
Turn ON Main Power
Check the SSR high speed operation by remote control.
(The Indoor Fan Motor is connected)
The voltage of PIN NO 1(blue) and 3(yellow) of CN-FAN or CN-MOTOR.
About AC 180V over
About AC 50V over
SSR is not damaged
SSR Check
36 Multi Air Conditioner
Electronic Parts Troubleshooting Guide
5. When Vertical Louver does not operate.
• Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.
• If the regular torque is detected when rotating the Vertical Louver with
hands ⇒ Normal
• Check the connecting condition of CN-U/D Connector
• Check the soldering condition(on PWB) of CN-U/D Connector
Check the operating circuit of the Vertical Louver
• Confirm that there is DC +12V between pin ①(RED) of CN-U/D and
GND.
If there are no problems after above checks
• Confirm the assembly conditions that are catching and interfering parts
in the rotation radial of the Vertical Louver
Service Manual 37
Electronic Parts Troubleshooting Guide
6. When Heating does not operate
Turn ON Main Power
Operate “Heating Mode( )” by setting the desired temperature of the
remote control is higher than one of the indoor temperature by 2°C at
least.
In heating Mode, the indoor fan operates in case the pipe temperature
is higher than 28°C.
Check the connector of intake and pipe sensor(thermistors)
• Check the related circuit of R02H(12.1K), R01H(1.0K), R04H(6.2K),
R03H(1.0K).
• Check the indoor room temperature is disconnected or not (about
10KΩ/at 25°C).
• Check the indoor pipe temperature is disconnected or not (about
5KΩ/at 25°C).
Check the DC voltage on the PWB ASS’Y
• The details of check are as followings
• Comp Relay.
Check point
• 4-Way Relay
Comp ON
Between two pin
of DC part in relay Below DC 1V
for COMP.
Comp OFF
About DC
12V
Check point
4-Way OFF
Between two pin
of DC part in relay Below DC 1V About DC 12V
for 4-way.
Check Outdoor Unit
38 Multi Air Conditioner
4-Way ON
Electronic Parts Troubleshooting Guide
7. Outdoor unit does not operate at all.
Check Outdoor Unit
PCB Board Operation Check in Outdoor
Content
Items
• Power Transformer
(Outdoor unit)
- Input Voltage
- Output Voltage
Remedy
- About AC220V/240V±10% - Check the power voltage • Replace Trans
- About AC14±3V
• DC +12V
• Replace IC01D
• DC +5V
• Replace IC02D
• IC01D(7812) Output
(Indoor/Outdoor unit)
• IC02D(7805) Output
(Indoor/Outdoor unit)
• Replace faulty parts
• IC01A(KIA7036, Reset IC)
X01(8MHz)
Turn off Main Power
• Check the electrical wiring diagram of outdoor side.
• Check the abnormal condition for the component of
Compressor/Outdoor Fan Motor/4-way.
• Check the “open” or “short” of connecting wires between indoor and
outdoor.
8. Communication error
• The control data can be transmitted or received between indoor and outdoor unit with one signal cable.
• If the data be disturbed by any noise level and misconnection, the unit will be operated incorrectly. In this
case, the indoor unit blinks the operation and operation LED on display and indoor fan, outdoor fan, COMP
are not operated.
• The unit can be reoperated by On/Off control of Remocon.
Service Manual 39
Installation
Installation
(1) Installation of Indoor, Outdoor unit
1) Selection of the best location
Front
1. Indoor unit
• There should not be any heat source or steam
near the unit.
• There should not be any obstacles to prevent
the air circulation.
• A place where air circulation in the room will be
good.
• A place where drainage can be easily obtained.
• A place where noise prevention is taken into
consideration.
• Do not install the unit near the door way.
• Ensure the spaces indicated by arrows from
the wall, ceiling, fence, or other obstacles.
2. Outdoor unit
• If an awning is built over the unit to prevent
direct sunlight or rain exposure, be careful that
heat radiation from the condenser is not
restricted.
• There should not be any animals or plants
which could be affected by hot air discharged.
• Ensure the spaces indicated by arrows from
the wall, ceiling, fence, or other obstacles.
Left
Rear left
Down right
Right
Rear right
More than 5 cm
More than
5 cm
More than
5 cm
More than eye-level
More than 20 cm
More than 20 cm
More than
70 cm
3. Piping length and the elevation
Indoor unit
Pipe Size
Capacity
(Btu/h)
GAS
10, 12K
1/2"(3/8")
LIQUID
Max. piping
length
A (m)
Max.
Elevation
B (m)
1/4"
15
7
A
B
Outdoor unit
40 Multi Air Conditioner
Installation
2) Indoor Unit Installation
The mounting wall should be strong and solid
enough to protect it from the vibration.
marking-off line
Thread
Weight
The lower left and the right side of
Installation Plate
Left rear piping
Right rear piping
20mm
40mm
50mm
ø70mm
ø70mm
Wall
Indoor
Outdoor
5~7mm
2. Drill the piping hole with 70mm dia. holecore
drill.
• Line according to the arrows marked on lower
the left and the rght side of the Installation Plate.
The meeting point of the extended line is the
center of the hole.
• Drill the piping hole at either the right or the left
and the hole should be slightly slant to the outdoor side.
Type "A" screw
40mm
1. Mount the installation plate on the wall with
four Type "A" screws.
(If mounting the unit on the concrete wall, consider using anchor bolts.)
• Always mount the Installation plate horizontally
by aligning the marking-off line by means of the
thread and a level.
Installation Plate
Service Manual 41
Installation
(2) Piping and Drainage of Indoor Unit
1) Preparation of pipings
Pipe cutter
1. Cut the pipes and the cable.
• Use the accessory piping kit or the pipes purchased locally.
• Measure the distance between the indoor and
the outdoor unit.
• Cut the pipes a little longer than the measured
distance.
• Cut the cable 1.5m longer than the length of the
pipe.
Reamer
Point down
"A"; ø12.7 mm (1/2")
ø9.52 mm (3/8")
ø6.35 mm (1/4")
→ 0~0.5 mm
→ 0~0.5 mm
→ 0~0.5 mm
Handle
Bar
Bar
Copper pipe
Yoke
"A"
3. Flaring the pipes.
• Insert the flare nuts, mounted on the connection
ports of both indoor and outdoor unit, onto the
copper pipes. Some refrgerant gas may leak,
when the flare nuts are removed from the indoor
unit, as some gas is charged to prevent the
inside of the pipe from rusting.
• Fit the copper pipe end into the Bar of flare tool
about 0~0.5mm higher. (See illustration)
• Flare the pipe ends.
Rough
Pipe
2. Remove burrs.
• Remove burrs from cut edges of pipes.
• Turn the pipe end toward down to avoid the
metal powder entering the pipe.
Caution:
If burrs are not removed, they may cause a gas
leakage.
Slanted
90
Cone
Clamp handle
Red arrow mark
= Improper flaring =
4. Tape the flaring portion to protect it from the
dust or damages.
Inclined
Surface
damaged
Cracked
Uneven
thickness
When properly flared, the internal surface flare will
evenly shine and be of even thickness.
Since the flare part comes into contact with the connectors, carefully check the flare finish.
42 Multi Air Conditioner
Installation
2) Connection of Pipings
Installation plate
1. Remove the installation plate
• Pull the two '∆' marked portion of bottom of the
chassis and pull the installation plate out of chassis.
Pull
2. Route the drain hose and the indoor tubing.
Pull
For left rear piping
3. Route the tubing and the drain hose straight
backwards(see figure).
4. Insert the connecting cable into the indoor
unit through the piping hole.
• Do not connect the cable to the indoor unit.
• Make a small loop with the cable for easy connection later.
Tubing holder
• To remove the holder, press
the bottom of the chassis
near the holder upwards
and the tab is clear of its
hole.
• Turn it clockwise approx.
90° and remove it.
Pull
Press
5. Tape the tubing, drain hose and the connecting
cable. Be sure that drain hose locates at the
lowest side of the bundle.
Locating at the upper side can be a reason that
drain water overflows drain pan inside the unit.
Gas side piping
Connecting
cable
Liquid side piping
Drain hose
Service Manual 43
Installation
6. Indoor unit installation.
• Hook the indoor unit onto the upper position of
the installation plate. (Engage the two hooks of
the rear top of the indoor unit with the upper
edge of the installation plate.)
Ensure the hooks are properly seated on the
installation plate by moving it in left and right.
Connecting
cable
Drain hose
Press the lower left and right side of the unit
against the Installation Plate until the hooks
engage with their slots (sound click).
7. Connecting the pipings to the indoor unit.
• Align the center of the pipings and sufficiently
tighten the flare nut with fingers.
• Finally, tighten the flare nut with torque wrench
until the wrench clicks.
Wrench tightening the flare nut with forque
wrench, ensure the direction for tightening follows the arrows on the wrench.
Pipe Size
Torque
Liquid Side (1/4")
1.8kg m
Liquid Side (3/8")
4.2kg m
Gas Side (1/2")
5.5kg m
Gas Side (5/8")
6.6kg m
8. Wrap the insulation material around the connecting portion.
CAUTION: Take care to arrange the
pipings, drain hose and cables as
the right upper picture for inserting
it into the indoor unit and
refixing the tubing holder easily.
44 Multi Air Conditioner
Indoor unit tubing
Flare nut
Pipings
Spanner
Torque wrench
Plastic bands
Insulation material
Wrap the insulation material around the connecting
portion.
Installation
9. Set the pipings and the connecting cable to
the back of the chassis with the tubing
holder.
• Hook the edge of tubing holder to tap on chassis and push the bottom of tubing holder to be
engaged in the bottom of chassis.
Drain hose
Taping
Piping
Tubing holder
1 Hook
2 Push
10. Indoor unit installation.
• Hook the indoor unit onto the upper portion of
installation plate. (Engage the two hooks of the
rear top of the indoor unit with the upper edge
of the installation plate.)
Ensure the hooks are properly seated on the
installation plate by moving it in left and right.
Connecting
cable
Drain hose
Press the lower left and right side of the unit
against the Installation Plate until the hooks
engages with their slots (sound click).
Service Manual 45
Installation
(3) Connecting Pipings and the cable to Outdoor unit
1) Connecting the pipings to the Outdoor
unit
1. Align the center of the pipings and sufficiently
tighten the flare nut with fingers.
2. Finally, tighten the flare nut with torque
wrench until the wrench clicks.
• When tightening the flare nut with torque wrench,
ensure the direction for tightening follows the
arrow on the wrench.
Pipe Size
Torque
Liquid Side (1/4")
1.8kg m
Liquid Side (3/8")
4.2kg m
Gas Side (1/2")
5.5kg m
Gas Side (5/8")
6.6kg m
A-UNIT
Outdoor unit
Gas side piping
B-UNIT
Liquid side piping
Torque wrench
CAUTION
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power specialized for the air conditioner. As for the method of
wiring, be guided by the circuit diagram pasted on the inside of control box cover.
2) The means for disconnection from a power supply shall be incorporated in the fixed wiring and
have an air gap contact separation of at least 3mm in each active(phase) conductors.
3) The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from
vibrations to which the unit is subjected during the course of transportation. Check them and
make sure that they are all tightly fastened. (If they are loose, it could give rise to burn-out of the
wires.)
4) Specification of power source.
5) Confirm that electrical capacity is sufficient.
6) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.
7) Confirm that the cable thickness is as specified in the power sources specification.
(Particularly note the relation between cable length and thickness.)
8) Never fail to equip a leakage breaker where it is wet or moist.
9) The following troubles would be caused by voltage drop-down.
• Vibration of a magnetic switch, damage on the contact point there of, fuse breaking, disturbance to the
normal function of a overload protection device.
• Proper starting power is not given to the compressor.
46 Multi Air Conditioner
Installation
2) Connection of the cable
Outdoor unit
1. Remove the cover control from the unit by loosening the screw.
Connect the wires to the terminals on the control
board individually as the following.
Terminal block
Over 5mm
Holder for
power supply
cord
• L2-C242GL0
1(L) 2(N)
Terminal on the OUTDOOR UNIT
3
3 2(N) 1(L)
1(L) 2(N)
Cover control
Connecting cable
Power Cord
Power cord
3 2(N) 1(L)
Terminal on the INDOOR UNIT
B-UNIT
3 2(N) 1(L)
Terminal on the INDOOR UNIT
A-UNIT
2. Secure the cable onto the control board with the holder (clamper).
3. Refix the cover control to the original position with the
screw.
4. Use a recongnized circuit breaker between the power
source and the unit. A disconnection device to adequately disconnect all supply lines must be fitted.
• L2-H242GL0
1(L) 2(N)
Terminal on the OUTDOOR UNIT
3
3 2(N) 1(L)
1(L) 2(N)
Power Cord
1(L) 2(N)
3
4
Terminal on the INDOOR UNIT
A-UNIT
1(L) 2(N)
3
4
Terminal on the INDOOR UNIT
A-UNIT
CAUTION
GN
/YL
20
mm
CAPACITY
(Btu/h)
NORMAL CROSSSECTION AREA
~24K
2.5mm2
~36K
3.5mm2
~48K
5.5mm
The connecting cable connected to the indoor and
outdoor unit should be complied with the following
specifications (Rubber insulation, type H07RN-F
approved by HAR or SAA).
ø7.5mm
ø8.5mm
The power cord connected to the outdoor unit
should be complied with the following specifications
(Rubber insulation, type H05RN-F approved by HAR
or SAA).
GN
/YL
Models
NORMAL CROSSSECTION AREA
L2-C242GL0
1.5mm2
Others
0.75mm2
2
20
mm
Service Manual 47
Installation
CAUTION
If a power plug is not to be used, provide a circuit breaker between power source and the unit as shown below.
Main power source
Air
Conditioner
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
Connect the cable to the indoor unit
1. Connect the wires to the terminals on the control
board individually according to the outdoor unit connection.
• Ensure that the color of the wires of outdoor unit and the
terminal No. are the same as those of indoor unit respectively.
(Refer to Wiring diagram on page12.)
WARNING
• Be sure to refer to the wiring diagram label inside the
cover control and carry out the correct field wiring.
Wrong wiring can cause the unit to misoperate to result in
a fire hazard.
• Check local electrical codes and any specified wiring
instructions or limitations.
2. Attach the Grille onto the cabinet.
• Grasp lower the left and right side of the Grille and
engage four tabs on the top inside edge of the chassis.
• Press the Grille toward the chassis until it will be back into
place.
48 Multi Air Conditioner
Connecting cable
Installation
(4) Checking the drainage
1. To remove the front panel from the indoor unit,
remove the front panel from the indoor unit cabinet.
■ Set the air direction louvers up-and-down to the position(horizontally) by hand.
■ Remove the securing screws that retain the front
panel. Pull the lower left and right sides of the grille
toward you and lift it off.
(5) Form the piping
1. Form the piping by wrapping the connecting portion of the indoor unit with insulation material and
secure it with two kinds of vinyl tapes.
■ If you want to connect an additional drain hose, the
end of the drain outlet should be routed above the
ground. Secure the drain hose appropriately.
2. In cases where the outdoor unit is installed below
the indoor unit perform the following.
■ Tape the piping, drain hose and connecting cable
from down to up.
■ Secure the tapped piping along the exterior wall using
saddle or equivalent
Pull the right and
the left side.
Screw
Drain hose
2. To check the drainage.
■ Pour a glass of water on the evaporator.
■ Ensure the water flows through the drain hose of the
indoor unit without any leakage and goes out the
drain exit.
Taping
Pipings
Plastic band
Connecting
cable
Power cord
• Trap is required to prevent water from
entering into electrical parts.
3. Drain piping
■ The drain hose should point downward for easy drain
flow.
3. In cases where the Outdoor unit is installed above
the Indoor unit perform the following.
■ Tape the piping and connecting cable from down to
up.
■ Secure the taped piping along the exterior wall. Form
a trap to prevent water entering the room.
■ Fix the piping onto the wall by saddle or equivalent.
Seal a small opening
around the pipings
with gum type sealer.
Downward slope
■ Do not make drain piping.
Do not raise
Water
leakage
Accumulated
drain water
Air
Water Waving
leakage
Trap
Tip of drain hose
dipped in water
Water
leakage
Less than
50mm gap
Ditch
Trap
Service Manual 49
Installation
(6) Air Purging of the Pipings and indoor unit
The air which contains moisture remaining in the is refrigeration cycle may cause a malfunction on the
compressor.
1. Confirm that both the liquid side valve and the gas side valve are set to the closed position.
2. After connecting the piping, check the joints for gas leakage with gas leak detector.
3. Remove the service port nut, and connect the gauge manifold and the vacuum pump to the service port
by the charge hose.
4. Vacuum the indoor unit and the connecting pipes until the pressure in them lowers to below-76cmHg.
5. Disconnect the charge hose and fit the nut to the service port.
(Tightening torque: 1.8kg.m)
6. Remove the valve stem nuts, and fully open the stems of the 2-way and 3-way valves with a hexagon
wrench.
7. Tighten the valve stem nuts of the 2-way valve and 3-way valve.
Indoor unit
Liquid side
Closed
2-way
valve
Gas side
3-way
valve
Vacuum pump
OPEN
50 Multi Air Conditioner
CLOSE
Closed
Outdoor unit
Installation
(7) Maximum Length of Pipe and Freon Extra Charge
Charge amount per 1m
CONNECTION TYPE
Capacity
(Btu/h)
STANDARD
LENGTH(m)
A
B
C
D
Charge am't(g)
per 1m
~7000
7.5
7
15
7
15
20
~9000
7.5
7
15
7
15
20
~12000
7.5
7
15
7
15
20
~18000
7.5
10
20
10
20
20
~24000
7.5
15
30
15
30
30
B(Length)
INDOOR UNIT
A(Height)
OUTDOOR UNIT
C(Height)
INDOOR UNIT
D(Length)
** A, B mean indoor unit higher located than outdoor unit.
C, D mean outdoor unit higher located than indoor unit.
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability. Oil trap should be installed every 5~7
meters (16.4~23.0ft).
Service Manual 51
Installation
(8) Test running
1) Connection of power supply
1. Connect the power supply cord to the independent power supply.
2. Prepare the remote control.
• Insert two batteries provided.
Remove the battery cover from the remote controller.
• Slide the cover according to the arrow direction.
Insert the two batteries.
(Two "R03" or "AAA" dry-cell batteries or equivalent.)
• Be sure that the (+) and (-) directions are correct.
• Be sure that both batteries are new.
Re-attach the cover.
• Slide it back into position.
3. Operate the unit at cooling operation mode
for fifteen minutes or more.
Battery Cover
Settlement of Outdoor Unit
Bolt
• Anchor the outdoor unit with a bolt and nut
(ø10cm) tightly and horizontally on a concrete or
rigid mount.
• When installing on the wall, roof or rooftop,
anchor the mounting base securely with a nail or
wire assuming the influence of wind and earthquake.
• In the case when the vibration of the unit is conveyed to the house, settle the unit with an antivibration rubber.
Tubing connection
2) Evaluation of the performance
1. Measure the temperature of the intake and
discharge air.
2. Ensure the difference between the intake
temperature and the discharge one is more
than 8°C.
Discharge air
52 Multi Air Conditioner
Operation
Operation
(1) Name and Function-Remote Control (Cooling Models)
Remote Controller
1
ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping operation.
2
TIME SETTING BUTTONS
Used to adjust the time.
3
TIMER SET/CANCEL BUTTONS
Used to set the timer when the desired time is obtained
and to cancel the Timer operation.
4
SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
5
AIR CIRCULATION BUTTON
Used to circulate the room air without cooling or heating (turns indoor fan on/off).
6
ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
7
PLASMA(OPTION)
Used to start or stop the plasma-purification function.
NEGATIVE ION(OPTION)
Used to generate negative ion.
8
HORIZONTAL AIRFLOW DIRECTION CONTROL
BUTTON (NOT ON ALL MODELS)
Used to set the desired horizontal airflow direction.
9
RESET BUTTON
Used prior to resetting time or after replacing batteries.
Signal transmitter.
Transmits the signals
to the room air conditioner.
Signal transmitter
ON
OFF
4
1
5
2
SET
CANCEL
3
6
PLASMA(or
)
7
8
9
Service Manual 53
Operation
(2) Name and Function-Remote Control (Heat Pump Models)
Remote Controller
ON/OFF TIMER BUTTONS
Used to set the time of starting and stopping operation.
Signal transmitter.
1
Transmits the signals
to the room air conditioner.
2
TIME SETTING BUTTONS
Used to adjust the time.
3
TIMER SET/CANCEL BUTTONS
Used to set the timer when the desired time is obtained
and to cancel the Timer operation.
Signal transmitter
4
5
6
ON
7
OFF
4
1
5
2
SET
SLEEP MODE AUTO BUTTON
Used to set Sleep Mode Auto operation.
AIR CIRCULATION BUTTON
Used to circulate the room air without cooling or heating
(turns indoor fan on/off).
ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
PLASMA(OPTION)
Used to start or stop the plasma-purification function.
NEGATIVE ION(OPTION)
Used to generate negative ion.
CANCEL
3
6
PLASMA(or
)
7
8
8
HORIZONTAL AIRFLOW DIRECTION CONTROL
BUTTON (NOT ON ALL MODELS)
Used to set the desired horizontal airflow direction.
9
RESET BUTTON
Used prior to resetting time or after replacing batteries.
9
54 Multi Air Conditioner
Disassembly of the parts (Indoor unit)
Disassembly of the parts (Indoor unit)
Warning :
Disconnect the unit from power supply before making any checks.
Be sure the power switch is set to “OFF”.
To remove the Grille from the Chassis.
• Set the up-and-down air discharge louver to open
position (horizontally) by finger pressure.
• Remove the securing screws
• To remove the Grille, pull the lower left and right
side of the grille toward you (slightly tilted) and lift
it straight upward.
Screw
1. To remove the sensor, housing connect, earth
conductor & step motor conductor with sensor holder, Motor, Evaporator & P.C.B.
Display
P.C.B
Conductor
Sensor
Conductor
Motor
Conductor
Earth
Conductor
Step Motor
Conductor
Service Manual 55
Disassembly of the parts (Indoor unit)
2. To remove the Control Box.
• Remove securing screws.
• Pull the control box out from the chassis carefully.
3. To remove the Discharge Grille.
• Unhook the discharge grille and pull the discharge grille out from the chassis carefully.
4. To remove the Evaporator.
• Remove 3 screws securing the evaporator(at
the left 2EA in the Eva Holder, at the right
1EA).
56 Multi Air Conditioner
• Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot.
5. To remove the Motor Cover
• Remove 2 securing screw.
• Pull the motor cover out from the chassis
carefully.
Motor cover
6. To remove the Cross-Flow Fan
• Loosen the screw securing the cross-flow fan
to the fan motor (do not remove).
• Lift up the right side of the cross-flow fan and
the fan motor, separate the fan motor from the
cross-flow fan.
• Remove the left end of the cross-flow fan from
the self-aligning bearing.
Service Manual 57
Exploded View and Replacement Parts List
Exploded View and Replacement Parts List
1. Indoor Unit
L2NH122GHL0, L2NC122GHL0
135316
152313
135314
152302
733010
131410
359011
342800
159830
159901
268712
346810
35211B
135516
354212
263230
352150
135311
268715
146811
268716
267110
249951
58 Multi Air Conditioner
W0CZZ
Exploded View and Replacement Parts List
PART No.
LOCATION
No.
DESCRIPTION
REMARKS
L2NC122GHL0
L2NH122GHL0
131410
CHASSIS ASSEMBLY
3141A20005B
3141A20005B
R
135311
GRILLE ASSEMBLY, DISCHARGE(INDOOR)
3531A10192G
3531A10192D
R
135316
GRILLE ASSEMBLY, FRONT(INDOOR)
3531A21018D
3531A21018K
R
135314
GRILLE ASSEMBLY, INLET SUB
3530A10079A
3530A10079A
R
135516
COVER ASSEMBLY, MOTOR
3551A20050W
3551A20050A
R
146811
MOTOR ASSEMBLY, STEP
4681A20055A
4681A20055A
R
152302
FILTER(MECH), A/C
5230A20014C
5230A20014C
R
159830
AIR CLEANER ASSEMBLY
5983A10006U
5983A10006U
R
159901
VANE, HORIZONTAL
5990A20007A
5990A20007A
R
249951
CONTROL BOX ASSEMBLY, INDOOR
4995A20213C
4995A10072D
R
263230
THERMISTOR ASSEMBLY
6323A20004A
6323A20004A
R
267110
REMOTE CONTROLLER ASSY
6711A20069B
6711A20069C
R
268712
PWB(PCB) ASSEMBLY, DISPLAY
6871A20227D
6871A20194A
R
268715
PWB(PCB) ASSEMBLY, MAIN(AC)
6871A20239A
6871A20267A
R
268716
PWB(PCB) ASSEMBLY, MAIN(DC)
6871A20229K
6871A20266A
R
342800
BEARING
4280A20004A
4280A20004A
R
346810
MOTOR ASSEMBLY, INDOOR
4681A20048D
4681A20048D
R
35211B
TUBE ASSEMBLY, TUBING
5211AR7066N
5211AR7066Y
R
352150
HOSE ASSEMBLY, DRAIN
5251AR2575F
5251AR2575F
R
354212
EVAPORATOR ASSEMBLY, FINAL
5421A20087B
5421A20087E
R
359011
FAN ASSEMBLY, CROSS FLOW
5901A20007A
5901A20007A
R
733010
PLATE ASSEMBLY, INSTALL
1H00843A
1H00843A
R
W0CZZ
CAPACITOR DRAWING
3H01487A
3H01487A
R
NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.
(GCSC WEBSITE http://[email protected])
Service Manual 59
437210
435311
435512
60 Multi Air Conditioner
559010
349600
430410
447910
546810
W0CZZ-2
W0CZZ-1
554030
554160
649950
435511
137213
552203-2
552203-3
552203-1
Exploded View and Replacement Parts List
2. Outdoor Unit
2-1. L2UC242GL0
Exploded View and Replacement Parts List
LOCATION
No.
PART No.
DESCRIPTION
REMARKS
L2UC242GL0
137213
PANEL ASSY, REAR
3720AP0003F
R
430410
BASE ASSY, OUTDOOR
3041AP2741G
R
435311
GRILLE ASSY, DISCHARGE(OUTDOOR)
3530A20007B
R
435511
COVER ASSY, CONTROL(OUTDOOR)
3551A20076C
R
435512
COVER ASSY, TOP(OUTDOOR)
3H03266K
R
437210
PANEL ASSY, FRONT SUB
3721A20005P
R
447910
BARRIER ASSY, OUTDOOR
4791A30004K
R
546810
MOTOR ASSY, AC
4681A20008D
R
349600
MOUNT, MOTOR
4960AP1361A
R
552203-1
VALVE, SERVICE
2H01890P
R
552203-2
VALVE, SERVICE
2H01890Q
R
552203-3
VALVE, SERVICE
2H02479J
R
554030
CONDENSER ASSY, BEND
5403A20072E
R
554160
COMPRESSOR ASSY, SET
2520UKRK2BB
R
559010
FAN ASSY, PROPELLER
1A00195B
R
649950
CONTROL BOX ASSY, OUTDOOR
4995AP2615F
R
W0CZZ-1
CAPACITOR, DRAWING
6120AR2194D
R
W0CZZ-2
CAPACITOR, DRAWING
2A00986G
R
NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.
(GCSC WEBSITE http://[email protected])
Service Manual 61
437210
435311
435512
62 Multi Air Conditioner
559010
349600
430410
447910
546810
561410-2
263230
554160
649950
552202
137213-1
268711
561410-1
W0CZZ-1
W0CZZ-2
554030
435511
437212
552203-2
552203-3
552203-1
137213-2
Exploded View and Replacement Parts List
2-2. L2UH242GL0
Exploded View and Replacement Parts List
LOCATION
No.
PART No.
DESCRIPTION
REMARKS
L2UH242GL0
137213-1
PANEL ASSY, SIDE-L
1A00201D
R
137213-2
PANEL ASSY, SIDE-R
3A02284M
R
437212
GRILLE, REAR
1A00207B
R
268711
PWB(PCB)ASSY, MAIN(OUTDOOR)
6871A20273A
R
430410
BASE ASSY, OUTDOOR
3041AP2741G
R
435311
GRILLE ASSY, DISCHARGE(OUTDOOR)
3530A20007J
R
435511
COVER ASSY, CONTROL(OUTDOOR)
3551A20076E
R
437210
PANEL ASSY, FRONT SUB
3721A20004L
R
447910
BARRIER ASSY, OUTDOOR
4791A30004C
R
546810
MOTOR ASSY, AC
4681A20008D
R
349600
MOUNT, MOTOR
4960AP1361A
R
552203-1
VALVE, SERVICE
2H01890P
R
552203-2
VALVE, SERVICE
2H01890Q
R
552203-3
VALVE, SERVICE
2H02479J
R
554030
CONDENSER ASSY, BEND
5403A20072X
R
554160
COMPRESSOR ASSY, SET
2520UKRK2BB
R
559010
FAN ASSY, PROPELLER
1A00195B
R
561410-1
COIL ASSY, REVERSING
6141AR3509T
R
561410-2
COIL ASSY, REVERSING
6141AR3509S
R
CONTROL BOX ASSY, OUTDOOR
4995A10071A
R
W0CZZ-1
CAPACITOR, DRAWING
6120AR2194D
R
W0CZZ-2
CAPACITOR, DRAWING
2A00986G
R
435512
COVER ASSY, TOP(OUTDOOR)
3H03266L
R
263230
THERMISTOR ASSEMBLY
6323A20002A
R
552202
VALVE, REVERSING
5220AR3084A
R
649950
NOTE) *Please ensure GCSC since these parts may be changed depending upon the buyer's request.
(GCSC WEBSITE http://[email protected])
Service Manual 63
P/No.: 3828A20156N
January, 2005
Printed in Korea