serv eng lm360c-h-e 20120307154958

serv eng lm360c-h-e 20120307154958
website http://www.lgservice.com
e-mail http://www.lgeservice.com/techsup.html
LG
LG
Multi Type Air Conditioner
SERVICE MANUAL
MODEL: L3-C363LA0
L3-C363MA0
L3-C363NA0
L3-H363LA0
L3-H363MA0
L3-H363NA0
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
About MPS ...................................................................................................................................................7
Product Specifications ......................................................................................................................................8
Dimensions ........................................................................................................................................................10
Refrigeration Cycle Diagram .............................................................................................................................12
Wiring Diagram ...................................................................................................................................................13
Electronic Control Device..................................................................................................................................14
Schematic Diagram ...........................................................................................................................................17
Functions ............................................................................................................................................................20
Operation Details................................................................................................................................................23
2-way, 3-way Valve..............................................................................................................................................30
Cycle Troubleshooting Guide............................................................................................................................34
Electronic Parts Troubleshooting Guide ..........................................................................................................42
Operation ............................................................................................................................................................56
Disassembly of the parts (Indoor unit).............................................................................................................58
Exploded View and Replacement Parts List ....................................................................................................60
2 MPS 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 MPS 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 MPS 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.
About MPS
About MPS
MPS (Multi Power System)
Conventional (On/Off Operation)
Indoor Temp (°C)
ON
OFF
ON
OFF
27
25
• During a Conventional Air Conditioning
Cycle, the Compressor must turn on and
off to reach desired Temperature setting.
23
21
19
0
0:05
0:10
0:15
0:20
Operation time (min)
• A large portion of power is used during
Restart.
This causes unnecessary power
consumption.
MPS
Indoor Temp (°C)
100% operation
40% operation
27
25
23
21
19
0
0:05
0:10
0:15
0:20
Operation time (min)
• MPS(Multi Power System) is a power
saving system With Two rotary
compressors of different capacity (60%
& 40%) Operating an A/C at high power
until it reaches desired temperature.
• And when it reaches the temperature,
only the 40% Capacity rotary
compressor operates.
Service Manual 7
Product Specifications
Product Specifications
1. L3-C363LA0, L3-C363MA0, L3-C363NA0
Operation
3-Unit On
Unit
Item
Cooling Capacity
Heating Capacity
34,200/36,000
Btu/h(kcal/h)
Moisture Removal
Power Source
Air Circulation
2-Unit On
/h
22,800/24,000 11,400/12,000
Input
Cooling
dB(A)
-
-
3.6
2.4
1.2
at 230V
1Ø, 208/230V, 60Hz
Indoor
–
–
8
63
Indoor
–
–
Outdoor
W
40/38/36
54
4,020/4,020
2,530/2,530
1,340/1,340
–
–
–
17.9/17.9
11.6/11.6
5.9/5.9
–
–
–
Heating
Runnig
Cooling
Current
Heating
E.E.R.
Cooling
Btu/h.w
8.5/8.9
9.0/9.5
8.5/8.9
C.O.P.
Heating
-
–
–
–
Dimensions(W x H x D)
Net. Weight
Service Valve
A
mm
kg
mm(Inch)
Refrigerant(R-22)
g
Airflow Direction Control(Up & Down)
Remote Controller Type
Indoor
888x287x170
Outdoor
870 x 1060 x 320
Indoor
9
Outdoor
78
Liquid
6.35(1/4)
Gas
12.7(1/2)
2,500
–
O
L.C.D Wireless
Sleeping Operation
O
Drain Hose
O
8 MPS Multi Air Conditioner
208/230V
-
Outdoor
Noise Level
( Hi / Med / Low )
Remarks
-
ø, V, Hz
/min
1-Unit On
–
at 230V
208/230V
at 7.5m
Product Specifications
2. L3-H363LA0, L3-H363MA0, L3-H363NA0
Operation
3-Unit On
Unit
Item
Cooling Capacity
Heating Capacity
Moisture Removal
34,600/36,000
Btu/h(kcal/h)
ø, V, Hz
Air Circulation
m /min
Input
Cooling
3
dB(A)
3.6
2.4
Indoor
–
–
Outdoor
–
–
1.2
at 230V
8
–
–
40/38/36
54
3,920/3,920
2,660/2,660
1,500/1,500
–
–
–
17.5/17.5
12.2/12.2
6.7/6.7
–
–
–
Runnig
Cooling
Current
Heating
E.E.R.
Cooling
Btu/h.w
8.8/9.2
8.7/9.0
7.7/8
C.O.P.
Heating
-
–
–
–
Net. Weight
Service Valve
Refrigerant(R-22)
A
mm
kg
mm(Inch)
g
Airflow Direction Control(Up & Down)
Remote Controller Type
208/230V
63
Indoor
Heating
Dimensions(W x H x D)
Remarks
1Ø, 208/230V, 60Hz
Outdoor
W
1-Unit On
23,040/24,000 11,500/12,000
–
ℓ/h
Power Source
Noise Level
( Hi / Med / Low )
2-Unit On
Indoor
888 x 287 x 170
Outdoor
870 x 1060 x 320
Indoor
9
Outdoor
78
Liquid
6.35(1/4)
Gas
12.7(1/2)
2,500
780
780
at 230V
208/230V
at 7.5m
O
L.C.D Wireless
Sleeping Operation
O
Drain Hose
O
Service Manual 9
Dimensions
Dimensions
1. Indoor Unit
D
H
W
Tubing hole cover
Installation plate
Left rear piping
Right rear piping
A
A
Center
Center
A
ø70mm
MODEL
DIM
A
ø70mm
L3-C363LA0, L3-C363MA0, L3-C363NA0
L3-H363LA0, L3-H363MA0, L3-H363NA0
W
mm
888
H
mm
287
D
mm
170
10 MPS Multi Air Conditioner
Dimensions
2. Outdoor Unit
L5
L1
L10 L11 L11 L11 L11 L11
L4
H
L3
D
L2
W
Gas side
3-way valve
Liquid side
2-way valve
L9
L7
L6
MODEL
DIM
L8
L3-C363LA0, L3-C363MA0, L3-C363NA0
L3-H363LA0, L3-H363MA0, L3-H363NA0
W
mm
870
H
mm
1038
D
mm
320
L1
mm
360
L2
mm
340
L3
mm
25
L4
mm
1035
L5
mm
25
L6
mm
546
L7
mm
160
L8
mm
160
L9
mm
44
L10
mm
64.5
L11
mm
50
Service Manual 11
Refrigeration Cycle Diagram
Refrigeration Cycle Diagram
1. L3UH363LA0, L3UH363MA0, L3UH363NA0
Indoor Side
Outdoor Side
4- WAY Valve
B
A
Accum.
C
COMP B
COMP A
2. L3UC363LA0, L3UC363MA0, L3UC363NA0
Indoor Side
B
A
Accum.
C
Outdoor Side
COMP A
COMP B
ex)
Capillary
Solenoid Valve
L.E.V
3-Way Valve
2-Way Valve
12 MPS Multi Air Conditioner
Wiring Diagram
Wiring Diagram
Indoor Unit
L3-C363LA0, L3-C363MA0, L3-C363NA0
L3-H363LA0, L3-H363MA0, L3-H363NA0
FORCED
OPERATION
AUTO
RESTART
CN-TH2
THERMISTOR
(OUT PIPE)
CN-TH1
REMOTE
CONTROL
THERMISTOR
(IN PIPE/AIR)
CN-U/D
CN-POWER
MOTOR
SW01F
CN-MOTOR
MAIN PCB ASSY
STEP
MOTOR
CN-DISP1
RD BK BR BL
C
G
V
S PILLAR
TERMINAL
DISPLAY PCB ASSY
TO OUTDOOR UNIT
INDOOR WIRING DIAGRAM
3854A24002C
Outdoor Unit
L3-C363LA0, L3-C363MA0, L3-C363NA0
L3-H363LA0, L3-H363MA0, L3-H363NA0
Service Manual 13
Electronic Control Device
Electronic Control Device
Indoor Unit
• MAIN P.C.B DC ASM
14 MPS Multi Air Conditioner
Electronic Control Device
Outdoor Unit
• MAIN P.C.B DC ASM
CN_RY_SV
L03M
NF04M
NF03M
NF01M
NF02M
CN_RY_FAN
L01M
D02M
C06M L04M
C11M
NF05M
CN_OOO
4
R10M
Q03M
L02M
C10M
D01M
TRANS2
RY_COMP(A)
R09M
R12M
CN_POWER1
IC04M
C29M L12M
R05M
CN_TH1
SW01F
C02A
Q07M
R31M
R33M
R34M
C25M
C31M
C28M
C12M
R30M
R36M
L01H
IC01A
R29M
IC05M
R32M
7
8
9
13
12
TRANS6
R26M
C26M
CN_JIG
CN_COM3
LED01T
OSC01B
L2(B)
L1(A)
L4(D)
L3(C)
C27M
C32M
D05M
TRANS5
C30M
C10D
Q08M
C08D
C51M
C52M
C50M
R02D
+
IC04D
C03D
R11M
~
-
~
C04D
C05D
5
L02D
6
1
3
D01D
BD01M
NTC
CN_TH2
R18M
Q04M
R19M
C24M
R27M
R28M
L09M
Q05M
C14M
C33M
IC03K
IC02K
CN_COM2
L10M
CN_POWER2
IC01K
C13M
R15M
R17M
R21M
C21M
L011M
ZD03M
PCB P/N : 6870A90186A
ASM P/N : 6871A20479A
CN_COM1
C15M
TRANS4
R22M
D06M
R01M
R06M
Q01Z
R16M
C16M
C22M
TRANS3
R37M
Q01M
C01M
C03M
IC03M
C02M
C19M
Q09M
RY_FAN(H)
D03M
C17M
R20M
Q06M
L06M
R25M
R35M
RY_FAN(L)
R03M
R04M
R08M
L05M
R24M
RY_GAS
R02M
L08M
C18M
ZD02M
RY_LIQ
Q02M
D04M
L07M
R14M
C23M
RY_4WAY
R23M
4
3
C09M
ZD01M
C04M
C05M
TRANS1
C07M
R07M
RY_COMP(B)
R13M
CN_LEV(C)
SMPS
C02D
CN_LEV(B)
CN_LEV(A)
C07D
L01D
C01D
2003.11.10
CN_TAB1(N)
CN_TAB2(L)
FUSE(250V/T5A)
ZNR01J
CN_POWER1
C02J
C01J
D01J
GND1
CN_POWER2
C09J
C08J
GND2
C03J
NF01J
NF02J
C04J
C07J
R01J
C05J
C06J
PCB P/N : 6870A90195A
ASM P/N : 6871A20500
Service Manual 15
Electronic Control Device
Display P.C.B ASM
16 MPS Multi Air Conditioner
CN-U/D
7
4
4
1
1
Vcc
RECEIVER
LIMIT
SWITCH
COM
NC
Option
NO
REMOTE CONTROL
1
2
3
1
2
3
1
2
4
AUTO RESTART
CN-SW
SW01F
C02L
220
10V
CN-DISP
FORCED OPERATION
3
6
5
6
GND
Vout
5
3
7
3
1
2
3
4
5
1
2
3
4
5
2
LED1
LED2
LED3
LED4
RD
OR
YL
PK
BL
2
CMP
Timer
Sleep
Operation
STEPPING MOTOR
(UP/DOWN)
R06F
6.2K
5V
receiver
R04F
6.2K
R01G~R04G
220
5
6
7
12
11
10
C06D
103
5V
R11H
R12H
R13H
O
5V
5V
Vss
ORG
DU
8
7
OJ2H
I
OJ3H OJ4H
D99
1N4148
7805
3
2
1
Q 4
D
C
S
EEPROM
ST93C46CB6
93C46B
5
6
7
8 Vcc
IC02D
OJ1H
+ C05D
470uF
25V
DC5V
9
IC01G
KID65004AF
R14H
C02D
104
50V
4
13
R11H~R14H
20K
R02F
12.1K
2
15
3
1
16
14
8
9
IC01M
KID65004AF
HVB OUT
6
5
4
3
2
1
53
4
4
7 6 5
4
1
1
CN-L/R
3
2
1 8
14 15 16 9
5
5
YL OR RD
C04D
104
50V
+ C03D
470uF
25V
O
7812
IC01D
I
C02D
104
50V
5V
+ C01D
680uF
25V
5
29
41
40
43
42
38
31
30
44
28
27
25
26
36
39
DC 5V
R97
10K
R96
10K
R81 1K
3
2
+
-
4
8
1
2
3.6V
R95
10K
5V
R21H~R25H
12.1K
1%
C02A
220
10V
3
OSC01B
CST-8.00MTW
C81
103
IC01A
KIA7036P
KSC7536
5V
BZ01E
PKM13EPP-4002
receiver
DC12V
IC9-1
KA393
1
R21H
R25H
R24H
R23H
R22H
C01A
0.01
25V
R02A,20K
OR1H
10K
5V
5V
C01L 680pF
50V
R02L,1K
R02B,10K
R01B,1M
R01L
5.1K
R02E,20
R01E
1K
R01T~R05T
5V
IC02M
KID65004AF
OR5H OR4H OR3H OR2H
OR3H~0R5H
56K
20K
47 46 45 13 14 34 33 4 3 11 12 10 9 8 7 6
DC12V
37
63
64
35
48
2
50
54
55
56
57
32
1
52
51
3
2
10 11 12 13
3
2
BL PK
16 17 18 19 20 62 61 21 22 23 24 60 15 59 58 49
STEPPING MOTOR
(LEFT/RIGHT)
Option
R90 1K
CN-MOTOR
DC 5V
C91
103
DC 5V
4
4
IC9-2
KA393
5
6
2
2
1
1
5V
5V
1
2
3
1
CN-DC/DC
C92
104,50V
2
2
5
4
3
2
1
5
4
3
2
1
1
3
3
1
4
4
CN-TH1
2
1
3
1
2
3
2
3
CN-TH2
CN-HVB
R99
750
1/4W
C07D
100uF
+ 63V POLY SW
RXE250
~
R02H
12.1K
1%
R26H
6.2k
1%
DC12V
R04H
6.2K
1%
R93 10K
INDOOR
FAN
MOTOR
3
3
-
+
R92 10K
7
R91
4.7K
12V
HVB OUT
Option
PIPE-TH
ROOM-TH
PIPE-TH
HVB OUT
2
1
4
3
4
3
2
1
Schematic Diagram
Schematic Diagram
Indoor Unit
Service Manual 17
18 MPS Multi Air Conditioner
CN-JIG
OUT_TH
OUT_PIPE
CN-TH2
SUCTION
DISCHARGE
CN-TH1
4
3
2
1
1
2
3
4
1
2
3
4
4
3
2
1
1
2
3
4
1
2
3
4
56K
R04T
10K
R01T
DC 5V
1K
R03T
1K
R02T
C01H-C04H : 103
R05H-R20H
(R05H,R06H,R07H:6.2K 1%)
(ETC: 12.1K 1%)
DC 5V
JIG_RX
JIG_TX
DC 5V
IC01A
2
7036P
1
3
C02A
10
50V
R03A,100
R02A,4.7K
+
R01B,1M
JIG_TX
JIG_RX
PWM(C)
PWM(B)
PWM(A)
OSC01B
CST-8.00MGW
C01A
0.01
25V
R01A,1K
OR2H,OR7H,OR10H:91K,OR3H-4H,OR8H-9H,OR11H-12H:15K(ETC:20K)
R04H,1K
R03H,1K
R02H,1K
R01H,1K
Vss
Xout
Xin
RESET
P22
P21
P54
P53
P52
P60
P61
P62
P63
P64
P65
P66
P67
P70
P71
P72
P73
P74
P75
P76
P77
TEST
VSS
AVDD
VDD
26
25
24
23
22
21
47
46
45
50
51
52
53
54
55
56
57
59
60
61
62
63
64
1
2
20
48
49
58
MICOM
19
30
29
28
27
36
35
34
33
32
31
14
13
12
11
10
9
8
7
6
5
4
3
44
43
42
41
40
39
38
37
TMP87CM41F
P20
P33
P32
P31
P30
P41
P40
P37
P36
P35
P34
P13
P12
P11
P10
P07
P06
P05
P04
P03
P02
P01
P00
P51
P50
P47
P46
P45
P44
P43
P42
R01F,1K
R04G,10K
R03G,10K
R02G,10K
R01G,10K
Q01Z
KRA107M
DC 5V
L4(C)
L3(C)
L2(B)
L1(A)
R02F,10K
RX(C)
TX(C)
RX(B)
TX(B)
RX(A)
TX(A)
SW01F
DC 5V
R01Z-R07Z : 4.7K
IC03M
IC02M
IC01M
RY-COMP(A)
RY-COMP(B)
RY-FAN(H)
RY-FAN(L)
RY-GAS
RY-LIQ
RY-4WAY
C52M
220
50V
C51M
220
50V
C50M
220
50V
+
1
2
3
4
5
+
1
2
3
4
5
+
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
CN-LEV(C)
CN-LEV(B)
CN-LEV(A)
DC 15V
Schematic Diagram
Outdoor Unit
•
4.7K
PWM(C)
4.7K
PWM(B)
4.7K
PWM(A)
C24M
100uf
C13M
100uf
C01M
100uf
R02M
9.1k
1%
R15M
9.1k
1%
+
R27M
9.1k
1%
R26M
10.2K
1%
Q07M
KRA101M
+
R14M
10.2K
1%
Q04M
KRA101M
+
R01M
10.2K
1%
6
7
6
7
6
7
21.5K
21.5K
5
4
2
3
2
C25M
102
100V
6.04K
1
2
3
2
C14M
102
100V
4.3K
DC 5V
5
4
6.04K
1
2
3
2
C02M
102
100V
4.3K
DC 5V
5
4
6.04K
1
21.5K
4.3K
R03M
13K
1%
39.2K
R16M
13K
1%
39.2K
1
51.1K
22
R28M
13K
1%
35.7K
20
1
51.1K
22
35.7K
20
1
51.1K
22
35.7K
20
39.2K
5
5
5
+
51.1K
10K
20
R04S
13K
+
51.1K
10K
20
R04S
13K
+
51.1K
10K
20
R04S
13K
4
4
14
4
34K
3
2
8
34K
R31M
220
51.1K
23.2K
3
2
8
IC06M
R19M
220
51.1K
23.2K
8.06K
5.23K
R29M,2K,1%
2.94K
7
6
20K
C26M
100uF
25V
1
9
8
3K
3
2
8
IC05M
R06M
220
51.1K
23.2K
8.06K
5.23K
R17M,2K,1%
2.94K
7
6
20K
14
34K
8.06K
5.23K
R04M,2K,1%
2.94K
7
6
3K
C15M
100uF
25V
1
9
8
14
20K
C03M
100uF
25V
1
9
8
3K
R33M
100K
R32M
10K
R21M
100K
R20M
10K
R08M
100K
R07M
10K
Q08M
2SD2220
C27M
473K
100V
+
Q05M
2SD2220
C16M
473K
100V
+
Q02M
2SD2220
C04M
473K
100V
+
C28M
680uF
63V
C17M
680uF
63V
C05M
680uF
63V
L09M
L10M
L05M
L06M
C31M
103K
100V
R22M
1.5K
R34M
1.5K
D05M
FMX12S
C29M
821K
1KV
C21M
103K
100V
R09M
1.5K
D03M
FMX12S
C18M
821K
1KV
C09M
103K
100V
C06M
821K
1KV
C30M
472/250V
L11M
L12M
C19M
472/250V
L07M
L08M
C07M
472/250V
6
6
4
3
2
6
S/W TRANS6
8
11
S/W TRANS5
4
3
2
S/W TRANS4
8
11
S/W TRANS3
4
3
2
S/W TRANS2
8
11
9
7
4
2
9
7
4
2
9
7
4
2
Vm(A)
MT 15V
ZD01M
12V
Vm(B)
MT 15V
ZD02M
12V
Q09M
Vm(C)
MT 15V
ZD03M
12V
R35M
68K
3W
D06M
ERB-44-08
Q06M
R23M
68K
3W
D04M
ERB-44-08
Q03M
R10M
68K
3W
D02M
ERB-44-08
R36M
200
R37M
30,1W
C32M
51.1K
C33M
222K
1KV
R24M
200
R25M
30,1W
C22M
51.1K
C23M
222K
1KV
R12M
200
R13M
30,1W
C10M
51.1K
C11M
222K
1KV
+
R11M
560K
1/2W
NTC
DKS-10D-22
C12M
330UF
450V
BD01M
D15XB60
DC 5V
DC 15V
MT 15V
DC 0V
DC 310V
C03D
220uF
10V
C05D
220uF
35V
+
+
50V
+
C02D
470uF
25V
C09J~C10J
C06D
103
50V
7805
IC04D
2K
1/2W
R02D
C08J
1K
1K
1K
L02D
12uH
R13K
R09K
R01K
C07D
103
50V
C08D
103
RX(C)
TX(C)
RX(B)
TX(B)
RX(A)
TX(A)
DC 5V
DC 15V
222*2
S/W TRANS1
1uF
L03M
L04M
+
D01D
1N4937
9mH
NF02J
C06J~C07J
C05J
C01D
1000UF
35V
L01D
12uH
+
C04D
470UF
35V
102
C03K
1K
R14K
102
C02K
1K
R10K
102
C01K
1K
R03K
GND
R01J C04J
7
1mH
NF01J
102M
C10D
D202
PC201
R201
7
3
2
IC03K
7
3
2
IC02K
7
3
2
IC01K
D201
OUT
GND
OUT
R202
9
12
13
10K
R04K
10K
R02K
1M
D01M
FMX12S
472*3
L01M
L02M
1uF
IC04M
8
5
6
1
5
6
1
5
6
S
C101
C102
BP
TNY
268
R102
D
PC201
IN
GND
FB
D101
R101
10K
R16K
20
R15K
10K
R12K
20
R11K
10K
R07K
10K
R06K
20
R05K
C03J
302
D01J
uRM1515-2B
u-POWER MODULE
4
8
4
8
10K
R08K
4
1
ZNR01J~ZNR02J
4
8
4
8
4
8
1uF
DC 5V
561*2
Q01M
KRA101M
NC
5
6
NC
3
1
DC 0V
DC 310V
RY-FAN(H)
RY-FAN(L)
RY-GAS
RY-LIQ
RY-4WAY
COM(C)
COM(B)
COM(A)
Vm(C)
DC 15V
NF01M
NF02M
NF03M
NF04M
NF05M
4
ZNR01J
INR14D471K
SVC561D-14A
FUSE
250V/T5A
3
4
RY-COMP(A)
3
RY-COMP(B)
COM(C)
Vm(B)
DC 15V
COM(B)
Vm(A)
DC 15V
COM(A)
3
1
1
1
1
1
1
4
3
2
1
4
3
1
1
1
1
1
1
4
3
2
1
4
3
2
3
1
2
4
1
4
3
2
2
3
1
1
NEUTRAL
CN-POWER
LIVE1
LIVE2
COMP A
COMP B
FAN HI
FAN LOW
CN-FAN
HOT GAS
LIQUID
4WAY
CN-COM3
CN-COM2
CN-COM1
Schematic Diagram
Service Manual 19
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.
20 MPS 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 28°C.
Functions
Remote Controller
Operation ON/OFF
Operation Mode Selection
Cooling Operation Mode.(
(Cooling
(Heating
model only) model only)
)
Healthy Dehumidification Operation Mode.(
Auto Operation Mode.(
)
Heating Operation Mode.(
)
)
Fan Speed Selection
(Low)
(Med)
(High)
(CHAOS)
Room, Temperature Display
: High: 39°C(102˚F)
LOW : 11°C(52˚F)
Temperature Setting
TEMPERATURE
HIGH
LOW
Cooling
Down to 18°C(64˚F)
Up to 30°C(86˚F)
Heating
Down to 16°C(60˚F)
Up to 30°C(86˚F)
JET COOL
Setting the Time or Timer
Timer Selection
ON
OFF
: OFF, ON, OFF
ON
Timer Setting
SET
Timer Cancel
CANCEL
: Cancel Sleep Mode, Timer ON or Timer OFF
Sleep Operation
: 1, 2, 3, 4, 5, 6, 7, Off Timer
Airflow Direction Control
˚C To ˚F Swtiching Button
˚C / ˚F
Fan Operation Mode
: Fan Operates without cooling or heating.
Reset
Service Manual 21
Display Function
Display Function
1. Heating Model
2. Cooling Model
Operation Indicator
Operation Indicator
• Cooling, Soft Dry, Fan
• Cooling, Soft Dry, Fan, Heating
Sleep Timer Indicator
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-diagnosis air conditioner and express the troubles if there is any trouble.
• Error mark is displayed on display window of indoor units and wired-remote controller, and LED of outdoor unit
control board.
• If more than two troubles occur simultaneously, lower number of error code is first displayed.
• After error occurs, if error is released, error LED is also released simultaneously.
1 digit
(Operation LED)
Outdoor Error
Indoor Error
Error
code
Contents
10 digit
(Sleep LED)
Case of error
Operation
Led
Indoor Status
Sleep
Indoor
Led
Fan
Vane
Outdoor Status
Comp &
LEV
Fan
Open
or Close
On or stop Open
or Close
01
Air sensor (open/short)
Open / Short
1 time
off
On or stop
Open
02
Inlet pipe sensor
Open / Short
2 time
off
On or stop
Open
05
Communication(Indoor → Outdoor)
Communication Poorly
5 time
off
Off
Close
Off
Close
06
Outlet pipe sensor
Open / Short
6 time
off
On or stop
Open
On or stop
Open
or Close
07
Different mode operation
Different mode operation
7 time
off
Off
Close
Off
Close
44
Outdoor Air sensor
Open / Short
4 time
4 time
Off
Close
Off
Close
45
Cond. Pipe sensor
Open / Short
5 time
4 time
Off
Close
Off
Close
51
Capacity over Error
Total Indoor capacity over
1 time
5 time
Off
Close
Off
Close
22 MPS Multi Air Conditioner
On or stop
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 23
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.
■ 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.
24 MPS 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 25
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.
26 MPS 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 27
Operation Details
■ Auto Restarting Operation
• When the power is restored after a sudden power failure while in appliance operation, the mode before the
power failure is kept on the memory and the appliance automatically operates in the mode on the memory.
• The slide switch on the main unit of the appliance should be on the Auto Restarting position in order that the
Auto Restarting operation is available.
• Operation Mode that is kept on the memory
- State of Operation ON/OFF
- Operation Mode/Setting Temp/Selected Airflow Speed
- Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour)
FORCED
OPERATION
AUTO
RESTART
REMOTE
CONTROL
Slide Switch
■ Forced Operation (C/O Model)
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch
is on the main unit of the appliance to operate the appliance in the standard conditions.
• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch
position is switched to the Auto Restarting position (or test operation) or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.
• When the slide switch position is switched from the forced operation position to the Auto Restarting position or
the remote control position, the forced operation is canceled and the appliance stops operating.
• The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of
airflow.
• 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.
■ Forced Operation (H/P Model)
• To operate the appliance by force in case that the remote control is lost, the forced operation selection switch
is on the main unit of the appliance to operate the appliance in the standard conditions.
• When the power is supplied while the slide switch is on the forced operation position, or when the slide switch
position is switched to the Auto Restarting (or test operation) position or switched from the remote control position to the forced operation position while the power is on, the forced operation is carried out.
• When the slide switch position is switched from the forced operation position to the Auto Restarting position or
the remote control position, the forced operation is canceled and the appliance stops operating.
• The forced operation is carried out in cooling mode with the setting temperature 22°C and the high speed of airflow.
• In the forced operation mode, the indoor fan is operated at low speed for around 15 sec and then the operation
condition is set according to the intake air temperature as follows.
24°C≤Intake Air Temp
➲ Cooling Mode Operation, 22°C, High Speed
21°C≤Intake Air Temp<24°C
➲ Dehumidification Operation, 23°C, High Speed
Intake Air Temp<21°C
➲ Heating Mode Operation, 24°C, High Speed
• 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.
28 MPS 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 29
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.
30 MPS Multi Air Conditioner
Open
(connected
manifold gauge)
2-way, 3-way Valve
(1) Pumping down
Indoor unit
Liquid side
2-Way
valve
Close
Outdoor unit
Gas side
3-Way
valve
Indoor unit
Open
Liquid side
2-Way
valve
Close
Gas side
3-Way
valve
Open
manifold gauge
Lowhandle
(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 indicating 1kg/
g.
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 31
2-way, 3-way Valve
(2) Evacuation
(All amount of refrigerant leaked)
Indoor unit
Liquid side
2-Way
valve
Open
Outdoor unit
Gas side
3-Way
valve
Indoor unit
Open
Liquid side
2-Way
valve
Open
Gas side
3-Way
valve
Open
manifold gauge
Vacuum pump
Lowhandle
(OPEN)
Hi- handle
(OPEN)
• 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).
32 MPS 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)
Indoor unit
Liquid side
2-Way
valve
Open
Outdoor unit
Gas side
3-Way
valve
Indoor unit
Open
Liquid side
2-Way
valve
Open
Gas side
3-Way
valve
Charging
cylinder
Open
manifold gauge
Low-handle
Check valve (OPEN)
Hi- handle
(OPEN)
• 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 33
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
34 MPS 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, 60Hz)
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-DC/AC
• 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 35
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).
36 MPS 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
-
: DC +5V
Check point
• Check the connecting circuit between PIN
R01L(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 if connection line (Indoor/Outdoor) is complied with Wiring Diagram.
Good connection
Check Outdoor Unit
(PCB Ass'y)
Bad connection
Correct connection line
Service Manual 37
Electronic Parts Troubleshooting Guide
4. When indoor Fan does not operate.(or "ON/OFF" led of display blinks 8 times)
Turn off Main power
Check it (Indoor/Outdoor)the connection line is complied with Wiring Diagram
Bad connection
Good connection
Correct connection line
Check the line fuse in the outdoor unit
Check the connection of CN-MOTOR
check the operation of blower by manual
Check POLY S/W in indoor PCB Ass'y
If it is opened
If it is shorted
Exchange Indoor PCB Ass'y
Check the outdoor PCB Ass'y
38 MPS 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
GND.
(RED) of CN-U/D and
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 39
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 if connection line (Indoor/Outdoor) is complied with Wiring Diagram.
Good connection
Check Outdoor Unit
(PCB Ass'y)
40 MPS Multi Air Conditioner
Bad connection
Correct connection line
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 41
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 30cm
(11.8 inch)
more than 30cm
(11.8 inch)
more than 70cm
(27.6 inch)
3. Piping length and the elevation
Indoor unit
Pipe Size
GAS
LIQUID
1/2"(3/8")
1/4"
Max. piping
length
A (m)
15
Max.
Elevation
B (m)
7.5
A
B
Outdoor unit
42 MPS Multi Air Conditioner
Installation
2) Indoor Unit Installation
The mounting wall should be strong and solid
enough to protect it from the vibration.
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.
marking-off line
Type "A" screw
Thread
Weight
The lower left and the right side of
Installation Plate
Left rear piping
Right rear piping
A
A
A
A
ø70mm
ø70mm
Wall
Indoor
Outdoor
5~7mm
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 43
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.
44 MPS 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.
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 45
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
Gas Side (3/8")
4.2kg m
Gas Side (1/2")
5.5kg m
Indoor unit tubing
Flare nut
Pipings
Spanner
Torque wrench
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.
Plastic bands
Insulation material
Wrap the insulation material around the connecting
portion.
46 MPS Multi Air Conditioner
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 47
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.
Outdoor unit
Pipe Size
Torque
Liquid Side (1/4")
1.8kg.m
Gas Side (3/8")
4.2kg.m
Gas Side (1/2")
5.5kg.m
A-UNIT
Gas side piping
A
B-UNIT
Evaporator side piping
B
C
Torque wrench
C-UNIT
Gas side piping
Evaporator side piping
48 MPS Multi Air Conditioner
Installation
Connection of the cable
Outdoor unit
1. Remove the cover control from the unit by
loosening the screw.
Terminal block
Over 5mm
A-UNIT
L1
L2
C
Power Source
208/230V AC
(High voltage)
C
G
G
V
B-UNIT
S
C
G
C-UNIT
V
S
C
G
V
S
Holder for
power supply
cord
Power supply
cable
Connecting cable(Low voltage)
V
S
C
G
V
S
C
G
V
S
Terminal BLOCK
Terminal BLOCK
Terminal BLOCK
Indoor A-UNIT
Indoor B-UNIT
Indoor C-UNIT
2. Dismount caps on the conduit panel.
3. Temporarily mount the conduit tubes on the conduit
panel.
4. Connect the wires to the terminals on the control
board individually as the following.
5. Secure the cable onto the control board with the
holder (clamper).
6. Ground the unit in accordance with local codes.
7. Refix the cover control to the original position with
the screw.
8. Use lock nuts to secure the conduit tubes.
Cover control
Connecting
cable
CAUTION
The power cable connected to the outdoor unit
should be complied with the following specifications.
(UL recognized and CSA certified)
AWG 12
NOTE
NOTE
1. Separately wire the high and low voltage line.
GN
/YL
2. Use heat-proof electrical wiring capable of
withstanding temperature up to 167˚F.
3. Use outdoor and waterproof connection cable rated
more than 300V for the connection between indoor
and outdoor unit. (For example, Type SJO-WA)
20
mm
The connecting cable connected to the indoor and
outdoor unit should be complied with the following
specifications. (UL recognized and CSA certified)
WARNING
WARNING
AWG 18
• Be sure to comply with local codes while running the
wire from the indoor unit to the outdoor unit(size of wire
and wiring method, etc).
• Every wire must be connected firmly.
• No wire should be allowed to touch refrigerant tubing,
the compressor or any moving parts.
GN
/YL
20
mm
Service Manual 49
Installation
Connection method of the connecting
cable(Example)
(1) Dismount two-caps on the conduit panel.
(2) Make a hole appropriate for the passage of connection cable through on cap by tool.
(for low voltage line)
(3) Pass the connecting cable through the hole.
(4) Properly connect the cable on the terminal block.
(5) Fix the connection cable with clamp cord provided on
the unit not to have strain at the terminal when the
connection cable is pulled outside up to a 35 pound
weight.
(6) Wind the vinyl tape round the connecting cable for
sealing between the surface of the connection cable
and cap.
(7) Mount the taped part of cable on the cap.
(8) Finally, mount the holed cap with the wound cable on
the conduit panel.
Terminal
block
Clamp cord
G
Cap(Reuse)
Lock nut
Hole
(for low voltage line)
Cap(Remove)
Taping
(for sealing)
Power supply line
(1ø, 230/208V)
Solid wire
How to connect wiring to the terminals
For solid core wiring (or F-cable)
(1) Cut the wire end with a wire cutter of wire-cutting pliers, then strip the insulation to expose the solid wire
about 25mm(15/16")
(2) Using a screwdriver, remove the terminal screw(s) on
the terminal plate.
(3) Using pliers, bend the solid wire to from a loop suitable for the terminal screw.
(4) Shape the loop wire properly, place it on the terminal
plater and tighten securely with the terminal screw
using a screwdriver.
For strand wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip the insulation to expose the strand
wiring about 10mm(3/8").
(2) Using a screwdriver, remove the terminal screw(s) on
the terminal plate.
(3) Using a round terminal fastener or pliers, securely
clamp each stripped wire end with a round terminal.
(4) Position the round terminal wire, and replace and
tighten the terminal screw using a screwdriver.
Strip 25mm(15/16")
Loop
Insulation
Strand wire
Strip 10mm(3/8")
When connecting each power wire to the corresponding
terminal, follow instructions "How to connect wiring to the
terminals" and fasten the wire tightly with the fixing screw
of the terminal plate.
Round
terminal
Low voltage
Loosening the
terminal block
screw
Connecting cable
50 MPS Multi Air Conditioner
Low voltage line
(connecting cable)
High voltage
WARNING
Loose wiring may cause the terminal to overheat or
result in unit malfunction. A fire hazard may also exist.
Therefore, be sure all wiring is tightly connected.
Conduit panel
Fastening the
wire tightly
Installation
CAUTION
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
Model
Circuit Breaker
Use a circuit
breaker or time
delay fuse.
18k
24k
36k
Power source Fuse or breaker
Capacity
1ø,230/208V
1ø,230/208V
1ø,230/208V
15A
20A
30A
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 page11.)
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.
Connecting cable
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.
Service Manual 51
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.
(9K Btu models: 2EA,
12K Btu models: 3EA)
Pull the right and
the left side.
Screw
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.
(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
Seal a small
opening around
the pipings with
gum type sealer.
Taping
Drain hose
Plastic
band
Pipings
Connecting
cable
Power supply
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.
Downward slope
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.
Trap
■ Do not make drain piping.
Do not raise
Water
leakage
Accumulated
drain water
Air
Water Waving
leakage
Tip of drain hose
dipped in water
Water
leakage
52 MPS Multi Air Conditioner
Ditch
Less than
50mm gap
Trap
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
2-Way
valve
Closed
Outdoor unit
Gas side
3-Way
valve
Indoor unit
Closed
Liquid side
2-Way
valve
Closed
Gas side
3-Way
valve
Closed
manifold gauge
Vacuum pump
Lowhandle
(OPEN)
Hi- handle
(OPEN)
Service Manual 53
Installation
(7) Maximum Length of Pipe and Freon Extra Charge
Multi Piping Type
Max total length
Capacity(Btu/h)
of all pipes
(A+B+C)
36k
Max length of
each pipe
(A/B/C)
Min length of
each pipe
(A/B/C)
15m
(50ft)
3m
(10ft)
45m
(150ft)
Max Elevation
Max elevation
between each
between indoor
indoor unit and
units (h2)
outdoor unit (h1)
7.5m
7.5m
(25ft)
(25ft)
Pipe Size
Indoor Capacity
(Btu/h)
Gas
Liquid
Standard Length
Additional
Refrigerant
12K
1/2"
1/4"
7.5m
(25ft)
30g/m
(0.32oz/ft)
A
h2
h2
h1
h1
h1
Oil trap
B
C
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).
54 MPS Multi Air Conditioner
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
NOTICE : Heating capacity decreases as outdoor
temperature decreases.
The unit can work below to 14F without unit out or
system shut down.
Service Manual 55
Operation
Operation
(1) Name and Function-Remote Control (Door Closed)
REMOTE CONTROL
Signal transmitter
Transmits the signals
to the room air conditioner.
Signal transmitter
1
START/STOP BUTTON
Operation starts when this button is pressed and stops
when the button is pressed again.
2
OPERATION MODE SELECTION BUTTON
Used to select the operation mode.
3
ROOM TEMPERATURE SETTING BUTTONS
Used to select the room temperature.
5
6
4
1
4
INDOOR FAN SPEED SELECTOR
Used to select fan speed in four steps
low, medium, high, or CHAOS.
3
5
JET COOL
Used to start or stop the speed
cooling. (Speed cooling operates
super high fan speed in cooling mode.)
Flip-up door
(closed)
2
6
CHAOS SWING BUTTON
Used to stop or start louver movement and
set the desired up/down airflow direction.
56 MPS Multi Air Conditioner
Operation
(2) Name and Function-Remote Control (Door Opened)
REMOTE CONTROL
Signal transmitter
Transmits the signals
to the room air conditioner.
Signal transmitter
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.
ON
OFF
1
4
2
5
SET
5
Used to circulate the room air without cooling or heating
(turns indoor fan on/off).
CANCEL
3
AIR CIRCULATION BUTTON
6
˚C/˚F
7
8
6
ROOM TEMPERATURE CHECKING BUTTON
Used to check the room temperature.
7
˚C TO ˚F SWITCHING BUTTON
8
RESET BUTTON
Used prior to resetting time or after replacing batteries.
Service Manual 57
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, step
motor conductor with sensor holder, Motor,
Evaporator & P.C.B.
Motor
Conductor
Sensor
Conductor
Step Motor
Conductor
58 MPS Multi Air Conditioner
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.
• Pull the discharge grille out from the chassis
carefully.
4. To remove the Evaporator.
• Remove screws securing the evaporator and
the holder eva.
• 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 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 59
Exploded View and Replacement Parts List
Exploded View and Replacement Parts List
1. Indoor Unit
567480-2
268711-2
567480-1
152302
135500
147581
60 MPS Multi Air Conditioner
135316
267110
135314
135311
268711-1
354210
152313
249951
359011
342800
146811
352150
131410
35211B
346810
733010
L3-C363LA0/C363MA0/C363NA0, L3-H363LA0/H363MA0/H363NA0
Exploded View and Replacement Parts List
Parts List - Indoor Unit
LOCATION
No.
DESCRIPTION
PART No.
L3-C363LA0 L3-C363MA0 L3-C363NA0 L3-H363LA0 L3-H363MA0 L3-H363NA0
SVC
CODE
131410
CHASSIS ASSEMBLY
3141A20003D 3141A20003D 3141A20003D 3141A20003D 3141A20003D 3141A20003D
R
135311
GRILLE ASSEMBLY,DISCHARGE(INDOOR)3531A10023X 3531A10023X 3531A10023X 3531A10023X 3531A10023X 3531A10023X
R
135312
GRILLE ASSEMBLY, FRONT
3531A10098B 3531A10098B 3531A10098B 3531A10098A 3531A10098A 3531A10098A
R
135500
COVER
3550A10107A 3550A10107A 3550A10107A 3550A10107A 3550A10107A 3550A10107A
R
146811
MOTOR ASSEMBLY, STEP
4681AR2727H 4681AR2727H 4681AR2727H 4681AR2727H 4681AR2727H 4681AR2727H
R
152302
FILTER(MECH), A/C
5230A20004A 5230A20004A 5230A20004A 5230A20004A 5230A20004A 5230A20004A
R
152313
DEODORIZER
5231AR2412T
159901
VANE,HORIZONTAL
5990A30007A 5990A30007A 5990A30007A 5990A30007A 5990A30007A 5990A30007A
R
249951
CONTROL BOX ASSEMBLY, INDOOR
4995A00003A 4995A00003A 4995A00003A 4995A00003A 4995A00003A 4995A00003A
R
263230-1
THERMISTOR ASSEMBLY
6323A20003A 6323A20003A 6323A20003A 6323A20003A 6323A20003A 6323A20003A
R
263230-2
THERMISTOR ASSEMBLY
6323A20024A 6323A20024A 6323A20024A 6323A20024A 6323A20024A 6323A20024A
R
267110
REMOTE CONTROLLER ASSEMBLY
6711A20025N 6711A20025N 6711A20025N 6711A20026U 6711A20026U 6711A20026U
R
268712
PWB(PCB) ASSEMBLY, DISPLAY
6871A30009Q 6871A30009Q 6871A30009Q 6871A30009Q 6871A30009Q 6871A30009Q
R
268714
PWB(PCB) ASSEMBLY, MAIN
6871A20502B 6871A20502B 6871A20502B 6871A20502A 6871A20502A 6871A20502A
R
342800
BEARING
346812
MOTOR ASSEMBLY, DC
35211B
TUBE ASSEMBLY, TUBING
352150
HOSE ASSEMBLY, DRAIN
5251AR2575H 5251AR2575H 5251AR2575H 5251AR2575H 5251AR2575H 5251AR2575H
R
354210
EVAPORATOR ASSEMBLY, FIRST
5421A20032D 5421A20032D 5421A20032D 5421A20032D 5421A20032D 5421A20032D
R
359011
FAN ASSEMBLY, CROSS FLOW
5901AR6141C 5901AR6141C 5901AR6141C 5901AR6141C 5901AR6141C 5901AR6141C
R
733010
PLATE ASSEMBLY, INSTALL
135314
GRILLE ASSY,INLET SUB
3H02821B
-
3H02821B
-
3H02821B
5231AR2412T
3H02821B
-
-
3H02821B
3H02821B
4681AR2295H 4681AR2295H 4681AR2295H 4681AR2295H 4681AR2295H 4681AR2295H
2H02449J
1H00843A
2H02449J
1H00843A
2H02449J
1H00843A
2H02449J
1H00843A
2H02449J
1H00843A
2H02449J
1H00843A
3531A10054R 3531A10054R 3531A10054R 3531A10054Q 3531A10054Q 3531A10054Q
Only in CND/Notin RMC
R
R
R
R
R
Service Manual 61
62 MPS Multi Air Conditioner
435301
437211
435512
552117
548490
559010
552112
552113
546810
430410
447910
554160-1
W0CZZ-1
567480-4
649950
567502
554160-2
661400
661400
135314
268711-3
268711-6
661400
137213-1
567480-5
W0CZZ-2
554031
435511
552203-2
552203-1
137213-2
Exploded View and Replacement Parts List
2. Outdoor Unit
L3UC363LA0, L3UC363MA0, L3UC363NA0
Exploded View and Replacement Parts List
Parts List - Outdoor Unit(L3UC363LA0, L3UC363MA0, L3UC363NA0)
LOCATION
No.
DESCRIPTION
PART No.
L3-C363LA0
L3-C363MA0
L3-C363NA0
SVC
CODE
135301
GRILLE,DISCHARGE
3530A20006B
3530A20006B
3530A20006B
R
435300
GRILLE,REAR
3530A10176B
3530A10176B
3530A10176B
R
263230-1
THERMISTOR ASSEMBLY
6323A20028A
6323A20028A
6323A20028A
R
263230-2
THERMISTOR ASSEMBLY
6323A20026A
6323A20026A
6323A20026A
R
430410
BASE ASSEMBLY, OUTDOOR
3041AP7177D
3041AP7177D
3041AP7177D
R
435511
COVER ASSEMBLY,CONTROL(OUTDOOR)
3551A10044B
3551A10044B
3551A10044B
R
435512
COVER ASSEMBLY,TOP(OUTDOOR)
3H03266H
3H03266H
3H03266H
R
437211
PANEL ASSEMBLY,FRONT(OUTDOOR)
3721A10109A
3721A10109A
3721A10109A
R
447910
BARRIER ASSEMBLY,OUTDOOR
4791A10019B
4791A10019B
4791A10019B
R
546810
MOTOR ASSEMBLY,OUTDOOR
4681AR1392X
4681AR1392X
4681AR1392X
R
548490
ACCUMULATOR ASSEMBLY(MECH)
5211A21233B
5211A21233B
5211A21233B
R
552112
TUBE ASSEMBLY,CONDENSER IN
5211A11010C
5211A11010C
5211A11010C
R
552113
TUBE ASSEMBLY, CONDENSER OUT
5211A12001C
5211A12001C
5211A12001C
R
552116
TUBE ASSEMBLY, REVERSING
-
-
-
R
552117
TUBE ASSEMBLY, SUCTION(OUTDOOR)
5211A10446C
5211A10446C
5211A10446C
R
554031
CONDENSER ASSEMBLY, BENT
5403A20168C
5403A20168C
5403A20168C
R
559010
FAN ASSEMBLY, PROPELLER
5901A10033A
5901A10033A
5901A10033A
R
561410-1
COIL ASSEMBLY, REVERSING VALVE
-
-
-
R
561410-2
COIL ASSEMBLY, SOLENOID
-
-
-
R
CONTROL BOX ASSEMBLY,OUTDOOR
4995A00002B
4995A00002B
4995A00002B
R
668711-1
PWB(PCB) ASSEMBLY,MAIN(AC)
6871A20500B
6871A20500B
6871A20500B
R
668711-2
PWB(PCB) ASSEMBLY,MAIN(OUTDOOR)
6871A20479B
6871A20479B
6871A20479B
R
137213-1
PANEL ASSEMBLY, SIDE
3721A10110A
3721A10110A
3721A10110A
R
137213-2
PANEL ASSEMBLY, SIDE
3721A10111C
3721A10111C
3721A10111C
R
552203-1
VALVE,SERVICE
2H01890U
2H01890U
2H01890U
R
552203-2
VALVE,SERVICE
2H02479R
2H02479R
2H02479R
R
554160-1
COMPRESSOR
2520UHGK2EA
2520UHGK2EA 2520UHGK2EA
R
554160-2
COMPRESSOR
2520UMMK2BA
2520UMMK2BA 2520UMMK2BA
R
561411-1
COIL ASSEMBLY,EXPANSION
6141A20018D
6141A20018D
6141A20018D
R
561411-2
COIL ASSEMBLY,EXPANSION
6141A20018E
6141A20018E
6141A20018E
R
561411-3
COIL ASSEMBLY,EXPANSION
6141A20018F
6141A20018F
6141A20018F
R
W0CZZ-1
CAPACITOR,DRAWING
0CZZA20007Q
0CZZA20007Q
0CZZA20007Q
R
W0CZZ-2
CAPACITOR,DRAWING
2H01451S
2H01451S
2H01451S
R
O.L.P
2H00599W
2H00599W
2H00599W
R
649950
567502
Service Manual 63
135301
435512
552116
548490
55211F
64 MPS Multi Air Conditioner
437211
559010
552112
552113
546810
430410
447910
554160-1
W0CZZ-1
263230-2
649950
137213-1
263230-1
567502
W0CZZ-2
554031
554160-2
668711-1
668711-2
135314
435511
552203-2
552203-1
561411-3
561411-2
561411-1
561410-2
561410-1
137213-2
Exploded View and Replacement Parts List
L3UH363LA0, L3UH363MA0, L3UH363NA0
Exploded View and Replacement Parts List
Parts List - Outdoor Unit(L3UH363LA0, L3UH363MA0, L3UH363NA0)
LOCATION
No.
DESCRIPTION
PART No.
L3-H363LA0
L3-H363MA0
L3-H363NA0
SVC
CODE
135301
GRILLE,DISCHARGE
3530A20006B
3530A20006B
3530A20006B
R
135314
GRILLE,REAR
3530A10176B
3530A10176B
3530A10176B
R
263230-1
THERMISTOR ASSEMBLY
6323A20028A
6323A20028A
6323A20028A
R
263230-2
THERMISTOR ASSEMBLY
6323A20026A
6323A20026A
6323A20026A
R
430410
BASE ASSEMBLY, OUTDOOR
3041AP7177D
3041AP7177D
3041AP7177D
R
435511
COVER ASSEMBLY,CONTROL(OUTDOOR)
3551A10044A
3551A10044A
3551A10044A
R
435512
COVER ASSEMBLY,TOP(OUTDOOR)
3H03266H
3H03266H
3H03266H
R
437211
PANEL ASSEMBLY,FRONT(OUTDOOR)
3721A10109A
3721A10109A
3721A10109A
R
447910
BARRIER ASSEMBLY,OUTDOOR
4791A10019B
4791A10019B
4791A10019B
R
546810
MOTOR ASSEMBLY,OUTDOOR
4681AR1392X
4681AR1392X
4681AR1392X
R
548490
ACCUMULATOR ASSEMBLY(MECH)
5211A21233A
5211A21233A
5211A21233A
R
552112
TUBE ASSEMBLY,CONDENSER IN
5211A11010C
5211A11010C
5211A11010C
R
552113
TUBE ASSEMBLY, CONDENSER OUT
5211A12001C
5211A12001C
5211A12001C
R
552116
TUBE ASSEMBLY, REVERSING
5211A10448A
5211A10448A
5211A10448A
R
552117
TUBE ASSEMBLY, SUCTION(OUTDOOR)
-
-
-
R
554031
CONDENSER ASSEMBLY, BENT
5403A20168A
5403A20168A
5403A20168A
R
559010
FAN ASSEMBLY, PROPELLER
5901A10033A
5901A10033A
5901A10033A
R
561410-1
COIL ASSEMBLY, REVERSING VALVE
6141A20021A
6141A20021A
6141A20021A
R
561410-2
COIL ASSEMBLY, SOLENOID
6141A20022A
6141A20022A
6141A20022A
R
CONTROL BOX ASSEMBLY,OUTDOOR
4995A00002A
4995A00002A
4995A00002A
R
668711-1
PWB(PCB) ASSEMBLY,MAIN(AC)
6871A20500B
6871A20500B
6871A20500B
R
668711-2
PWB(PCB) ASSEMBLY,MAIN(OUTDOOR)
6871A20479A
6871A20479A
6871A20479A
R
137213-1
PANEL ASSEMBLY, SIDE
3721A10110A
3721A10110A
3721A10110A
R
137213-2
PANEL ASSEMBLY, SIDE
3721A10111C
3721A10111C
3721A10111C
R
552203-1
VALVE,SERVICE
2H01890U
2H01890U
2H01890U
R
552203-2
VALVE,SERVICE
2H02479R
2H02479R
2H02479R
R
554160-1
COMPRESSOR
2520UHGK2EA
2520UHGK2EA 2520UHGK2EA
R
554160-2
COMPRESSOR
2520UMMK2BA
2520UMMK2BA 2520UMMK2BA
R
561411-1
COIL ASSEMBLY,EXPANSION
6141A20018D
6141A20018D
6141A20018D
R
561411-2
COIL ASSEMBLY,EXPANSION
6141A20018E
6141A20018E
6141A20018E
R
561411-3
COIL ASSEMBLY,EXPANSION
6141A20018F
6141A20018F
6141A20018F
R
W0CZZ-1
CAPACITOR,DRAWING
0CZZA20007Q
0CZZA20007Q
0CZZA20007Q
R
W0CZZ-2
CAPACITOR,DRAWING
2H01451S
2H01451S
2H01451S
R
567502
O.L.P
2H00599W
2H00599W
2H00599W
R
55211F
TUBE ASSEMBLY, SOLENOIDE
5211A00007A
5211A00007A
5211A00007A
R
649950
Service Manual 65
P/No.: 3828A20466A
August, 2004
Printed in Korea
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