LG AS-C306MSeries, AS-H306M Series, AS-C366N Series, AS-H366N Series Service Manual
LG
Room
Air Conditioner
SERVICE MANUAL
LG
MODELS: AS-C306M Series
AS-H306M Series
AS-C366N Series
AS-H366N Series
CAUTION
website http://www.lgservice.com
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
2 Room Air Conditioner
Air Conditioner Service Manual
TABLE OF CONTENTS
LG Model Name ...............................................................................................................................................3
Safety Precautions..........................................................................................................................................4
Dimensions .....................................................................................................................................................9
Symbols Used in this Manual.....................................................................................................................9
Indoor Unit..................................................................................................................................................9
Outdoor Unit.............................................................................................................................................10
Product Specifications ................................................................................................................................12
Installation .....................................................................................................................................................13
Installation of Indoor, Outdoor unit ...........................................................................................................13
Flaring Work and Connection of Piping....................................................................................................15
Connecting the cable between indoor unit and outdoor unit ....................................................................22
Air Purging ...............................................................................................................................................26
Test Running ............................................................................................................................................28
Operation ......................................................................................................................................................29
Main unit Function ...................................................................................................................................29
Display Function.......................................................................................................................................36
Self-diagnosis Function............................................................................................................................36
Name and Function-Remote Control .......................................................................................................37
Disassembly ..................................................................................................................................................38
Indoor Unit................................................................................................................................................38
Schematic Diagram.......................................................................................................................................42
Electric Control device..............................................................................................................................47
Wiring Diagram.........................................................................................................................................49
Troubleshooting Guide .................................................................................................................................52
Refrigeration Cycle Diagram ....................................................................................................................52
Pipe Length and the Elevation .................................................................................................................53
3-way Valve ..............................................................................................................................................54
Cycle Troubleshooting Guide ...................................................................................................................60
Electronic Parts ........................................................................................................................................61
Exploded View ..............................................................................................................................................67
Indoor Unit...............................................................................................................................................67
Outdoor Unit............................................................................................................................................69
Replacement Parts List ................................................................................................................................71
Indoor ......................................................................................................................................................71
Outdoor ....................................................................................................................................................72
Service Manual 3
LG Model Name
2004
12 - 345678910
Code Type Code of Model Meaning
1 Producing Center, A~Z L: Chang-won R22 N: India
Refrigerant A: Chang-won R410A Z: Brazil
C: Chang-won R407C D: Indonesia
T: China M: Mexico
K: Turkey R22 V: Vietnam
E: Turkey R410A S: Out Sourcing
H: Thailand
2 Product Type A~Z S: Split Type Air Conditioner
3 Cooling/Heating/Inverter A~Z C: Cooling only
H: Heat pump
X: C/O + E/Heater
Z: H/P + E/Heater
V: AC Inverter C/O
N: AC Inverter H/P
Q: DC Inverter C/O
W: DC Inverter H/P
4, 5 Capacity 0~9 Cooling/Heating Capacity
Ex. "09" → 9,000 Btu/h
6 Electric Range 1~9 1: 115V/60Hz, A: 220V, 50Hz, 3Phase
A~Z 2: 220V/60Hz B: 208~230V, 60Hz, 3Phase
3: 208-230V/60Hz C: 575V, 50Hz, 3Phase
5: 200-220V/50Hz D: 440~460, 60Hz, 3Phase
6: 220-240V/50Hz E: 265V, 60Hz
7: 110V, 50/60Hz F: 200V, 50/60Hz
8: 380-415V/50Hz
9: 380-415V/60Hz
7 Chassis A~Z Name of Chassis of Unit
Ex. LSP → SP Chassis
8 Look A~Z Look,
Color (Artcool Model)
9 Function A~Z
10 Serial No. 1~9 LG Model De
* ARTCOOL COLOR
velopment Serial No.
Basic A
Basic+4Way B
Plasma Filter C
Plasma Filter+4 Way D
Tele+LCD E
Tele+LCD+Nano plasma+4Way F
Nano Plasma F+(A/changeove)+A/clean+Low A G
Nano Plasma F+(A/changeove)+A/clean+4way+Low A H
Tele+LED+4way I
Internet J
Plasma F+4Way+Oxy generator K
Nano Plasma F+(A/changeove)+A/clean L
Nano Plasma F+(A/changeove)+A/clean+4way M
Nano Plasma F+(A/changeove)+A/clean+PTC N
Nano Plasma F+(A/changeove)+Autoclean+4way+PTC P
Nano Plasma F+(A/changeove)+A/clean+4way+Low A+PTC Q
Negative ION+A/Clean R
(Nano)Plasma+Negative ION+A/Clean S
4way+(Nano)Plasma F+Negative ION+Healthy dehumidification+A/Clean
T
Nano Plasma F+4Way+(A/changeove)+A/clean+ U
R Mirror
W White
B Blue
D Wood
M Metal
C Cherry
4 Room 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.
■ Meanings of symbols used in this manual are as shown below.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
Be sure not to do.
Be sure to follow the instruction.
Do not use damaged power cords, plugs, or a
loose socket.
Always use the power plug and socket with the
ground terminal.
• There is risk of fire of electric shock. • There is risk of electric shock.
Install the panel and the cover of control box
securely.
.Do not modify or extend the power cord.
• There is risk of fire of electric shock. • No grounding may cause electric shock.
■ Installation
Service Manual 5
Safety Precautions
Do not install the product on a defective installation stand.
Be sure the installation area does not
deteriorate with age.
• It may cause injury, accident, or damage to the
product.
• If the base collapses, the air conditioner could fall
with it, causing property damage, product failure,
and personal injury.
• Sharp edges could cause injury. Be especially careful of the case edges and the fins on the condenser
and evaporator.
•
There is risk of fire, electric shock, explosion, or injury.
Be cautious when unpacking and installing the
product.
For installation, always contact the dealer or
an Authorized service center
For re-installation of the installed product,
always contact a dealer or an authorized service center.
Do not install, remove, or re-install the unit by
yourself.
• There is risk of fire, electric shock, explosion, or
injury.
• There is risk of fire, electric shock, explosion, or
injury.
6 Room Air Conditioner
Safety Precautions
■ Operation
Do not turn the air-conditioner ON or OFF by
plugging or unplugging the power plug.
Use a dedicated outlet for this appliance.
• There is risk of fire or electrical shock. • There is risk of fire or electrical shock.
Grasp the plug to remove the cord from the
outlet. Do not touch it with wet hands.
Do not place a heater or other appliances near
the power cable.
• There is risk of fire or electrical shock. • There is risk of fire and electric shock.
Do not allow water to run into electrical parts. Do not store or use flammable gas or com-
bustibles near the air conditioner.
• There is risk of fire, failure of the product, or electric
shock.
• There is risk of fire or failure of product.
Wax
Thinner
Service Manual 7
Safety Precautions
Always check for gas (refrigerant) leakage after
installation or repair of product.
Install the drain hose to ensure that water is
drained away properly.
• Low refrigerant levels may cause failure of product. • A bad connection may cause water leakage.
Keep level even when installing the product. Use two or more people to lift and transport
the air conditioner.
• To avoid vibration or water leakage. • Avoid personal injury.
■ Installation
90°
Unplug the unit if strange sounds, odors, or
smoke comes from it.
Be cautious that water could not enter the
product.
• There is risk of electric shock or fire. • There is risk of fire, electric shock, or product damage.
8 Room Air Conditioner
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 damage to the
plastic parts of the product.
• There is risk of personal injury.
Do not step on or put anyting on the product.
(outdoor units)
Do not insert hands or other objects through
the air inlet or outlet while the air conditioner
is plugged in.
• There is risk of personal injury and failure of product. • There are sharp and moving parts that could cause
personal injury.
■ Operation
Wax
Safety Precautions
Service Manual 9
Dimensions
Tubing hole cover
Tubing hole cover
Installation plate
D
W
H
W
H
Tubing hole cover
Tubing hole cover
Installation plate
D
W
H
Tubing hole cover
Tubing hole cover
Installation plate
D
Indoor Unit
This symbol alerts you to the risk of electric shock.
This symbol alerts you to hazards that could cause harm to the
air conditioner.
This symbol indicates special notes.
NOTICE
Symbols Used in this Manual
W mm 1,259 1,499
H mm 349 349
D mm 205 205
Model
Dimension
SM CHASSIS SN CHASSIS
Dimensions
10 Room Air Conditioner
Outdoor Unit
Dimensions
MODEL
DIM
W
L7 L6 L8 L9
D
L1
L2
L3
L10L11
L4L5
H
Gas side
3-way valve
Liquid side
3-way valve
W mm 870
H mm 800
D mm 320
L1 mm 370
L2 mm 340
L3 mm 25
L4 mm 775
L5 mm 25
L6 mm 546
L7 mm 162
L8 mm 162
L9 mm 54
L10 mm 79
L11 mm 76.4
30k SERIES
• 30k
Service Manual 11
Dimensions
L6L7 L8
L9
L4
H
L5
W
D
L1
L3
L2
L10 L11
Gas side
3-way valve
Liquid side
3-way valve
36k SERIES
MODEL
DIM
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 75
L11 mm 80
• 36k
12 Room Air Conditioner
Product Specifications
Product Specifications
Cooling Capacity
BTU/h(kcal/h)
W
Heating Capacity
BTU/h(kcal/h)
W
Moisture Removal l/h
Power Source Ø, V, Hz
Air Circulation m3/min
Noise Level dB(A)
±3
Input W
Runnig Current A
Starting Current A
E.E.R. BTU/h-W
C.O.P W/W
Motor Output W
Dimensions mm
(W x H x D)
Net. Weight kg
Refrigerant(R410A) g
Airflow Direction Control (Up & Down)
Airflow Direction Control (Right & Left)
Negative lon
Air Purifying Filter
Deicer
Hot Start
Chaos Wind
Micom Dry
Timer
Self Diagnosis
Remocon type
Service valve
Sleeping Operation
Drain Hose
Connecting Cable
Power Cord
28,000(7,051) 28,000(7,051) 34,000(8,568) 34,000(8,568)
8,211 8,211 9,964 9,964
- 29,000(7,313) - 35,500(8,945)
- 8,504 - 10,404
3.4 3.4 3.85 3.85
1Ø, 220~240V, 50Hz 1Ø, 220~240V, 50Hz 1Ø, 220~240V, 50Hz 1Ø, 220~240V, 50Hz
19.8 19.8 26 26
58 58 58 58
46 46 47 47
58 58 58 58
3,100 3,100 3,700 3,700
- 3,200 - 3,700
13.5 13.5 17 17
- 14.0 - 17
80 80 92 92
-80-92
9.03 9.03 9.19 9.19
- 2.66 - 2.77
47 47 65 65
80 80 50 50
1,259 x 349 x 205 1,259 x 349 x 205 1,499 x 349 x 205 1,499 x 349 x 205
870 x 800 x 320 870 x 800 x 320 870 x 1038 x 320 870 x 1038 x 320
20 20 25 25
72 72 77 77
2350 2350 2750 2750
YES YES YES YES
OPTION OPTION OPTION OPTION
NO NO NO NO
YES YES YES YES
NO YES NO YES
NO YES NO YES
YES YES YES YES
YES YES YES YES
24hr, ON/OFF 24hr, ON/OFF 24hr, ON/OFF 24hr, ON/OFF
YES YES YES YES
L.C.D Wireless L.C.D Wireless L.C.D Wireless L.C.D Wireless
3/8"(9.52) 3/8"(9.52) 3/8"(9.52) 3/8"(9.52)
5/8"(15.88) 5/8"(15.88) 3/4"(19.05) 3/4"(19.05)
YES YES YES YES
YES YES YES YES
0.75mm
2
0.75mm
2
0.75mm
2
0.75mm
2
2.5mm
2
2.5mm
2
5.5mm
2
5.5mm
2
Model Name
Unit
Indoor
Outdoor
Indoor
Outdoor
Cooling
Heating
Cooling
Heating
Cooling
Heating
Cooling
Heating
Indoor
Outdoor
Indoor
Outdoor
Indoor
Outdoor
Liquid
Gas
Item
AS-C306M SERIES AS-H306M SERIES AS-C366N SERIES AS-H366N SERIES
Service Manual 13
Installation
Installation
Installation of Indoor, Outdoor unit
1) Select the best location
1. Indoor unit
■ Do not have any heat or steam near the unit.
■ Select a place where there are no obstacles in
front of the unit.
■ Make sure that condensation drainage can be
conveniently routed away.
■ Do not install near a doorway.
■ Ensure that the space around the left and right of
the unit is more than 30cm. The unit should be
installed as high on the wall as possible, allowing
a minimum of 12cm from ceiling.
■ Use a stud finder to locate studs to prevent
unnecessary damage to the wall.
2. Outdoor unit
■ If an awning is built over the unit to prevent direct sun-
light or rain exposure, make sure that heat radiation
from the condenser is not restricted.
■ Ensure that the space around the back and sides is
more than 10cm. The front of the unit should have
more than 70cm of space.
■ Do not place animals and plants in the path of the
warm air.
■ Take the air conditioner weight into account and select
a place where noise and vibration are minimum.
■ Select a place so that the warm air and noise from the
air conditioner do not disturb neighbors.
■ Rooftop Installations:
If the outdoor unit is installed on a roof structure, be
sure to level the unit. Ensure the roof structure and
anchoring method are adequate for the unit location.
Consult local codes regarding rooftop mounting.
If the outdoor unit is installed on root structures or walls,
this may result in excessive noise and vibration, and
maybe also classed as non serviceable installation.
2) Piping length and elevation
More than 12cm
More than
30cm
More than
30cm
More than 2.3m
More than 10cm More than 10cm
More
than 60cm
More than 60cm
More than 70cm
More than 10cm More than 10cm
More
than 60cm
More than 60cm
More than 70cm
In case more than 5m
• 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.
Outdoor unit
Indoor unit
A
B
Outdoor unit
Indoor unit
A
B
CAUTION
Install the indoor unit on the wall where the height
from the floors more than 2.3 meters.
A minimum pipe run of 7.5 meters is required to minimise vibration & excessive noise.
CAUTION
30k 5/8" 3/8" 7.5 15 30 30
36k 3/4" 3/8" 7.5 20 30 50
Pipe Size
Capacity
(Btu/h)
GAS LIQUID
Max.
length
A
(m)
Additional
Refrigerant
(g/m)
Max.
Elevation
B (m)
Standard
Length
(m)
36k
30k
14 Room Air Conditioner
Installation
3) How to fix installation plate
The wall you select should be strong and solid enough to prevent
vibration
1. Mount the installation plate on the wall with four
type A screws. If mounting the unit on a concrete
wall, use anchor bolts.
Mount the installation plate horizontally by
aligning the centerline using a level.
2. Measure the wall and mark the centerline. It is also
important to use caution concerning the location
of the installation plate-routing of the wiring to
power outlets is through the walls typically.
Drilling the hole through the wall for piping connections must be done safely.
5-7mm
(0.2~0.3")
Indoor
WALL
Outdoor
Installation Plate
Type "A" screw
Right rear pipingLeft rear piping
ø
70mm195mm
115mm
115mm
180mm
Right rear piping
30k
36k
Left rear piping
50mm
ø
70mm180mm
115mm
4) Drill a hole in the wall
■ Drill the piping hole with a ø70mm hole core drill.
Drill the piping hole at either the right or the left
with the hole slightly slanted to the outdoor side.
Service Manual 15
Installation
Flaring Work and Connection of Piping
1) Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure.
1. Cut the pipes and the cable.
■ Use the piping kit accessory or the pipes
purchased locally.
■ Measure the distance between the indoor and the
outdoor unit.
■ Cut the pipes a little longer than measured
distance.
■ Cut the cable 1.5m longer than the pipe length.
2. Burrs removal
■ Completely remove all burrs from the cut cross
section of pipe/tube.
■ Put the end of the copper tube/pipe in a downward direction as you remove burrs in order to
avoid dropping burrs into the tubing.
3. Putting nut on
■ Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having completed burr removal.
(not possible to put them on after flaring work)
Copper
pipe
90°
Slanted Uneven Rough
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Pipe
Reamer
Point down
4. Flaring work
■ Carry out flaring work using flaring tool as shown
below.
Firmly hold copper pipe in a die in the dimension
shown in the table above.
5. Check
■ Compare the flared work with figure below.
■ If flare is noted to be defective, cut off the flared
section and do flaring work again.
mm inch mm
ø6.35 1/4 0 ~ 0.5
ø9.52 3/8 0 ~ 0.5
ø12.7 1/2 0 ~ 0.5
ø15.88 5/8 0 ~ 1.0
ø19.05 3/4 1.0 ~ 1.3
Outside diameter A
Flare nut
Copper tube
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
16 Room Air Conditioner
Installation
2) Connection of piping-Indoor
1. Remove the 2 screws of right side panel.
2. Remove the front right side panel by the arrow.
■ The connector can be disconnected by pulling it
while pressing the connector's hook.
■ Remove the 1 screw for fixing lower panel.
3. Remove the lower panel by the arrow.
■ Take care not to scratch the wall and mat to
drop.
1. Route the indoor tubing and the drain hose in the
direction of rear left.
2. Insert the connecting cable into the indoor unit
from the outdoor 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.
Right side panel
Drain hose
Main PCB
Lower panel
Lower panel
For left rear piping
CAUTION
When install, make sure that the
remaining parts must be
removed clearly so as not to
damage the piping and drain
hose, especially power cord and
connecting cable.
Service Manual 17
Installation
3. Tape the tubing, drain hose and the connecting
cable. Be sure that the drain hose is located at the
lowest side of the bundle. Locating at the upper side
can cause drain pan to overflow inside the unit.
3. Tape the tubing, drain hose and the connecting
cable. Be sure that the drain hose is located at the
lowest side of the bundle. Locating at the upper side
can cause drain pan to overflow inside the unit.
NOTE: If the drain hose is routed inside the room,
insulate the hose with an insulation material*
so that dripping from "sweating"(condensation) will not damage furniture or floors.
*Foamed polyethylene or equivalent is rec-
ommended.
4. Indoor unit installation
■ Hook the indoor unit onto the upper portion of the
installation plate.(Engage the three hooks of the
rear top and rear lower of the indoor unit with the
upper edge and lower edge of the installation
plate.) Ensure that the hooks are properly seated
on the installation plate by moving it left and right.
5. Connecting the pipings to the indoor unit and drain
hose to drain pipe.
■ Align the center of the pipings and sufficiently
tighten the flare nut by hand.
■ Tighten the flare nut with a wrench.
■ When extending the drain hose at the indoor unit,
install the drain pipe.
Connecting
cable
Loop
Gas side
piping
Liquid side
piping
Drain hose
Installation
plate
Three upper
hooks
Installation plate
Indoor unit
Three lower
hooks
Setting line
Indoor unit tubing Flare nut Pipings
Connection pipe
Flare nut
Indoor unit tubing
Torque wrench
Spanner (fixed)
Vinyl tape(narrow)
Adhesive
Drain pipe
Indoor unit drain hose
Pipe Size[Torque]
Capacity
(Btu/h)
GAS LIQUID
30k 5/8"[6.6kg.m] 3/8"[4.2kg.m]
36k 3/4"[6.6kg.m] 3/8"[4.2kg.m]
18 Room Air Conditioner
Installation
6. Wrap the insulation material around the connecting
portion.
■
Overlap the connection pipe insulation material and
the indoor unit pipe insulation material. Bind them
together with vinyl tape so that there is no gap.
■ Wrap the area which accommodates the rear piping housing section with vinyl tape.
■ Bundle the piping and drain hose together by
wrapping them with vinyl tape over the range within which they fit into the rear piping housing section.
1. Route the indoor tubing and the drain hose to the
required piping hole position.
2. Insert the piping, drain hose and the connecting
cable into the piping hole.
3. Insert the connecting cable into the indoor unit.
■ Don't connect the cable to the indoor unit.
■ Make a small loop with the cable for easy
connection later.
4. Tape the drain hose and the connecting cable.
• Connecting cable
Plastic bands
Insulation material
Drain hose
Drain pipe
Connecting cable
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Vinyl tape
(wide)
Wrap with vinyl tape
Indoor
unit pipe
Pipe
Wrap with vinyl tape
Drain hose
Pipe
Vinyl tape(wide)
For right rear piping
Service Manual 19
Installation
5. Indoor unit installation
■ Hook the indoor unit onto the upper portion of the
installation plate.(Engage the three hooks of the
rear top and rear lower of the indoor unit with the
upper edge and lower edge of the installation
plate.) Ensure that the hooks are properly seated
on the installation plate by moving it left and right.
6. Connecting the pipings to the indoor unit and the
drain hose to drain pipe.
■ Align the center of the pipings and sufficiently
tighten the flare nut by hand.
■ Tighten the flare nut with a wrench.
■ When extending the drain hose at the indoor unit,
install the drain pipe.
7. Wrap the insulation material around the connecting
portion.
■
Overlap the connection pipe heat insulation and the
indoor unit pipe heat insulation material. Bind them
together with vinyl tape so that there is no gap.
■ Wrap the area which accommodates the rear
piping housing section with vinyl tape.
Installation
plate
Three upper
hooks
Installation plate
Indoor unit
Three lower
hooks
Setting line
Vinyl tape
Adhesive
Drain hose
Indoor unit drain hose
(narrow)
Plastic bands
Insulation material
Vinyl tape(narrow)
Connection
pipe
Connecting cable
Indoor
unit piping
Pipe
Vinyl tape
(wide)
Wrap with vinyl tape
Indoor unit tubing Flare nut Pipings
Torque wrench
Indoor unit tubing
Spanner (fixed)
Connection pipe
Flare nut
30k 5/8"[6.6kg.m] 3/8"[4.2kg.m]
36k 3/4"[6.6kg.m] 3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h)
GAS LIQUID
20 Room Air Conditioner
Installation
■ Bundle the piping and drain hose together by
wrapping them with cloth tape over the range
within which they fit into the rear piping housing
section.
8. Reroute the pipings and the drain hose across the
back of the chassis.
9. Reinstall the parts to the original position.
■ Refix the lower panel to the original position.
■ Connect display conductor.
■ Refix the front right side panel to the original
position with the two screws.
Drain hose
Vinyl tape(narrow)
Pipe
Wrap with
vinyl tape(wide)
Lower panel
Main PCB
Piping for
passage through
piping hole
Service Manual 21
Installation
3) Connection of the drain hose
■ The drain hose can be connected at two different
positions. Use the most convenient position and, if
necessary, exchange the position of the drain
pan, rubber cap and the drain hose.
➊ Drain pan
➋ Rubber cap
➌ Drain hose
➍ Exchange if necessary
■ Remove the drain hose.
■ Securely insert both the rubber plug and drain
hose into the drain outlets.
Be sure the rubber the cap is securely fastened
so that there is no leakage.
4) Connection of piping-Outdoor
1. Align the center of the pipings and sufficiently
tighten the flare nut by hand.
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.
1
2
3
4
Outdoor unit
Gas side piping
(Bigger diameter)
Liquid side
piping
(Smaller
diameter)
Torque wrench
Gas side piping
(Bigger diameter)
Liquid side piping
(Smaller diameter)
Torque wrench
30k 5/8"[6.6kg.m] 3/8"[4.2kg.m]
36k 3/4"[6.6kg.m] 3/8"[4.2kg.m]
Pipe Size[Torque]
Capacity
(Btu/h)
GAS LIQUID
30k
36k
22 Room Air Conditioner
Installation
Connecting the cable between indoor unit and outdoor unit
1) Connect the cable to the Indoor unit.
■
Connect the cable to the indoor unit by connecting the wires to the terminals on the control
board individually according to the outdoor unit
connection.(Ensure that the color of the wires of the
outdoor unit and the terminal No. are the same as
those of the indoor unit.)
REDBLUE
BROWN
4(N)Terminals on the indoor unit 3(L) 5
4(N)
Terminals on the outdoor unit
Color of Wires
POWER INPUT
Color of Wires
3(L)2(N)1(L)
5
G/Y
REDBLUE
BROWN
G/Y
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).
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).
CAUTION
8.5mm
20mm
GN/YL
NORMAL
CROSS-SECTIONAL
AREA 2.5mm
2
8.5mm
20mm
GN/YL
NORMAL
CROSS-SECTIONAL
AREA 5.5mm
2
20mm
GN/YL
NORMAL
CROSS-SECTIONAL
AREA 0.75mm
2
7.5mm
30k
36k
If a power plug is not to be used,
provide a circuit breaker between
power source and the unit as
shown below.
CAUTION
Air
Conditioner
Main power source
Circuit Breaker
Use a circuit breaker
or time delay fuse.
Service Manual 23
Installation
2) Connect the cable to the outdoor unit
1. Remove the control cover from the unit by loosening the screw.
Connect the wires to the terminals on the control
board individually.
2. Secure the cable onto the control board with the
cord clamp.
3. Refix the control cover to the original position with
the screw.
4. Use a recognized circuit breaker 30A (30k), 35A
(36k) between the power source and the unit. A disconnecting device to adequately disconnect all
supply lines must be fitted.
Terminal block
Over 5mm
Cover control
Connecting cable
The power
connecting cable
Connecting
cable
Terminal block
Cover control
Over 5mm
Connecting cable
The power
connecting cable
After the confirmation of the above conditions, prepare the wiring as follows:
1) Never fail to have an individual power circuit specifically for the air conditioner. As for the method
of wiring, be guided by the circuit diagram posted on the inside of control cover.
2) 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 cause burn-out of the wires.)
3) Specification of power source.
4) Confirm that electrical capacity is sufficient.
5) See to that the starting voltage is maintained at more than 90 percent of the rated voltage marked
on the name plate.
6) Confirm that the cable thickness is as specified in the power source specification.
(Particularly note the relation between cable length and thickness. (Refer to page 22)
7) Always install an earth leakage circuit breaker in a wet or moist area.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the contact point, fuse breaking, disturbance of the nor-
mal function of the overload.
9) 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.
CAUTION
Outdoor Unit
30k
36k
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