Daewoo DMB-1812LH User manual

CONTENTS
1. Specifications..........................................................................................................2
2. Outline and Dimensions.........................................................................................3
3. Installation Section..................................................................................................6
4. Operation ..............................................................................................................23
5. Wiring Diagram.....................................................................................................36
6. Refrigerant Cycle..................................................................................................38
7. Control Block Diagram .........................................................................................39
8. Trouble Shooting...................................................................................................41
9. Key Components of Electronic Circuit.................................................................71
10. Disassembly Instructions .....................................................................................75
1) Indoor Unit........................................................................................................75
2) Outdoor Unit.....................................................................................................77
3) Exploded Diagram (Indoor Unit)......................................................................78
4) Exploded Diagram (Outdoor Unit)...................................................................83
5) Control Box Assembly......................................................................................85
Contents

2
1. SPECIFICATIONS
MODEL DMB-1812LH (9K) DMB-1812LH (12K) DMB-1812LH (9K+12K)
Function
Class T
Power AC 220-240V, 50Hz
Capacity
Dehumidification 1.15 2.10 3.25
Running Current
Power Input
Starting Current 49 A
Type Rotary (Hitachi)
Model SHW33TC4-U
Capacitor 50µF/370VAC
-
Type -
Capacitor -
Motor Model Number -
Control Capillary
Charge Quality 1700 g
Type Flare
OD (Liquid/Suction) 1/4” (6.35 mm) / 1/2” (12.7 mm)
Indoor Unit Dimension (W x H x D) 750 x 245 x 174 925 x 285 x 194 -
Outdoor Unit Dimensions (W x H x D) 872 x 675 x 325
Net Weight Indoor Unit (kg) 7.00 9.70 -
Outdoor Unit (kg) 55.94
Electrical
Data
Compressor
Fan
Motor
Refrigerant
(R-22)
Connection
DMB-1812LH
W
Btu/h
l/h
A
W
A
Cooling Heating Cooling Heating Cooling Heating
2637.6
9000
2637.6
9000
3516.8
12000
3516.8
12000
5275.2
18000
5275.2
18000
8.0
1800.0
8.0
1800.0
8.0
1800.0
8.0
1800.0
8.5
1850.0
8.0
1800.0
Indoor Unit
Cross flow fan
1.0µF 400VAC
YDK-8-4B(Xiangming)
Outdoor Unit
Propeller fan
5/45µF 400VAC
OSME-806DERC
Indoor Unit
Cross flow fan
1.0µF 400VAC
YDK-8-4B(Xiangming)
Outdoor Unit
Propeller fan
5/45µF 400VAC
OSME-806DERC

3
750
Plate Mounting
REMOCON
Connecting Pipe
Grille Insert
174
245
REMOTECONTROLLER
Frame Grille
Body
Plate Mounting
2. OUTLINE AND DIMENSIONS
1
INDOOR UNIT
DMB-1812LH (900BTU/h)

4
REMOCON
Filter - L Filter - R
Grille Insert
Frame Grille
Body
Plate Mounting
Connecting Pipe
Plate Mounting
406
194
285
925
REMOTECONTROLLER
DMB-1812LH(12000BTU/h)

5
Inlet
325
Foot
Cabinet Front Cover Service
Outlet
Outlet 675
Service Valve
872
Cabinet Side Guide PostPanel Top
2
OUTDOOR UNIT
DMB-1812LH

6
This Installation section explains how and where to connect this new air conditioner. Please read make sure all acces-
sories are included as shown below and read manual thoroughly. This Installation section is provided to assist the per-
son knowledgeable in air conditioner installation and should not be installed by anybody who is not thoroughly familiar
with this type of installation. Please contact a professional installer if necessary.
ACCESSORIES SUPPLIEDWITHTHE UNIT:
COPPERTUBING:
Copper tubing supplied is available at most dealers or A/C shops. Make sure the new copper tubing has the same
specifications and diameter as the original copper tubing and is as short as possible.
Note:
The remainders except for No. 2, 7, 11 are contained in the indoor boxes.
BASIC ACCESSORIES
ON OFF ENTER CANCEL
TIMER RESET
SWING
FAN SPEED
MODE
SLEEP
ON/OFF
TEMP.
12
8
679
3
10
11 12
5
4
No. Description Qty.
1 Wall Bracket 2
2 Outdoor Unit Cover 1
3 Remote Controller
4 Deodorizing Filter
5 Electrostatic Filter
2
2
2
6 Remote Holder 2
No. Description Qty.
7 Foot Cushion 4
8 Concrete Nails 10
9 Remote Holder Screws 6
10 Wall Bracket Screws 16
11 Wall Cap 4
12 Battery 4
Installation Section

OPTIONAL ACCESSORIES
1 2
4
3
5 76
ACCESSORIES NOT SUPPLIEDWITHTHE UNIT:
No. Description Part No. Qty Material Size Remark
1 Drain Hose Extension 3103200400 2 ID19.6 X 2m PVC Pipe
2 Tape 2TQ1008000 2 PVC 80W X 0.1T X 3.5m
3 Copper Tubing Extension 3100002600 2 1/2", 1/4" Copper Tube
4 Insulator Plate 3103301000 2 F-US 225 X 120 X 8T
5 Putty 2221040001 2 80g
6 Connection Cord 3102797200 2 3P X 6m
7 Signal Connection Cord 3112704600
3112704700 1 15P x 3m White 5P x 3m Red
Complete Optional 3100400000 1
Accessories
(1, 2, 3, 4, 5, 6, 7)
7

INSTALLATION DIAGRAM
Below is an overview for the connection of the Indoor unit to the Outdoor unit. The pages following will give detailed
instructions for full installation. Remember to read the complete Installation section and follow all the safety instructions
fully when installing the Indoor and Outdoor units.
OVERVIEW
This appliance must be installed according to national power supply acquirement.
NOTES:
•After installation it must be
possible for the user to dis -
connect the power supply
plug.
•
If the AC outlet is a 3-
pronged type or other, have
an electrician install a new
outlet.
•Contanct service man when
replace the power cord set.
•The specification of AC con -
nection is 1.5mm
2
X 4PX6m.
Drain
Hose
Ground Wire
(Not Supplied)
1/2" side piping
Connecting cable
Signal Wire
1/4" side piping
Drain Hose
Wall
Wall
Cap
Drain
Hose
Pipes
(Not Supplied) AC
Connection
(Not Supplied)
Wrap with
Tape
AC Outlet
and Plug
Copper
(12000
BTU/h)
(9000BTU/h)
Tubing
At least 30cm
(11.8in) from unit
Maximum Height 7M (21Ft)
Maximum Length 15M (49Ft)
Any tube length between 7 and 15 meters must
be precharged with freon using the following calulation: (Length –5) x 30 grams
Adding additonal tubing will decrease efficiency
60
cm
23.6
inches
cm
10
cm
3.9 inches
60
23.6
inches
70
cm
27.6
inches
Plug into 220V~240V
AC Outlet
10cm (3.95in)
from ceiling 30cm (11.8in) from
side wall
10cm (3.95in) from
side wall
10cm (3.95in) from
side wall
Wall
Bracket
8

INSTALLATION
1. Determine the type of wall (sheetrock, concrete, etc.)
and make sure it is strong enough to hold indoor unit.
Select an approximate position for the unit, taking the
required distances away from walls/AC outlet into
consideration.
INDOOR UNIT
•Do not install the unit in an area with direct sunlight, near
heat sources (radiator, etc.), or an area where leakage of
flammable gas may be expected.
•Select a position in the room, high on the wall, where the
whole room can be uniformly cooled.
•Select a location that can hold the weight of the unit and
where the copper tubing, drain hose and Indoor to Outdoor
Wire have the shortest distance to the Outdoor unit.
•Make sure the Indoor unit is installed at least 10cm (3.95in)
away from the top and left side wall and at least 30cm
(11.8in) from AC outlet and right side wall (see Overview
figure on previous page).
OUTDOOR UNIT
•Do not install the unit in an area near heat sources,
exhaust fans, or an area where leakage of flammable gas
may be expected.
•Do not install the unit in a humid, damp or uneven location.
•Select a location that is well ventilated .
•Leave enough room around the unit for air intake, exhaust
and possible maintenance.
2. Determine if the hole is to be made at the left or right
hole location.
10 mm 10 mm
150 mm 60 mm
3. Using drill with hole-cutting attachment or equivalent, cut
a hole 65mm (2.56") in diameter. The hole should be
made at a slight downward slant to the outdoor side.
Measure the thickness from the inside to outside edges
and cut a PVC pipe at a slight angle 1/4" shorter than the
thickness of the wall and insert pipe in wall.
4. For sheetrock, wooden or similar wall, measure down
from the ceiling using a level or tape measure and attach
the wall bracket to the wall using 4 screws. If you are not
able to line up the holes with the beams, use toggle
bolts. Make sure the wall bracket is even and flush
against the wall.
Indoor Outdoor
Cut at slight angle
CAUTION
•Before making hole, make sure there are no studs, pipes,
electrical wiring or conduit directly behind the area to be cut.
For Concrete, or similar type wall, make holes into the wall and insert concrete nails instead of screws.
INSTALLING THE WALL BRACKET:
To install the wall bracket, follow the procedures below. One hole is required for the tubing and may be either on the left or right side.
SELECTING A SITE:
DMB-1812LH
(9000BTU/h)
DMB-1812LH
(12000BTU/h)
10 mm 10 mm
150 mm 60 mm
9

DMB-1812LH(9000BTU/h)
NOTES:
• This appliance must be installed according to National
power supply requirement.
• If the supply cord is damaged, it must be replaced by
the manufacuturer or its service agent or a similarly
qualified person in order to avoid a hazard.
• Make sure the Indoor unit’s AC cord is not connected to
AC power when connecting the indoor/outdoor wire.
• When connecting wires, make sure they are fully insert-
ed and minimum copper wire is exposed. If they are
not, shorting, overheating, no operation, etc. may occur.
• Be sure to comply with local codes on running a wire
from the indoor to the outdoor unit.
2. Fish the indoor/outdoor wire from the rear of the
indoor unit through the front of the unit. For easier
connection, make sure enough wire is pulled through
the front.
Use the wire as shown below:
INSTALLINGTHE INDOOR/OUTDOOR WIRETOTHE INDOOR UNIT FOR AC CONNECTION
The Indoor/Outdoor wire is used to supply AC from the Indoor unit to the Outdoor unit. To install the indoor/outdoor wire,
follow the procedures below.
3. To connect wires, loosen the screw in the Terminal
Block and insert the correct wires like following figure.
Connect the Brown wire to the “Y”connection,
Yellow/Green wire to the “”connection and the
Blue wire to “L”connection.
YL
Brown Blue
Yellow/Green
DMB-1812LH
(9000BTU/h)
DMB-1812LH
(9000BTU/h)
Blue
Yellow/Green
Brown
Connection cover
Screw
1. Open the connection cover on the indoor unit to
access the connection area.
Remove the Connection
Cover.
•Loosen the screw fixed at
the Connection Cover.
•Remove the
Connection Cover.
10