Daewoo DMB-1812LH Schematic

Contents

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

1. SPECIFICATIONS

DMB-1812LH

MODEL

DMB-1812LH (9K)

DMB-1812LH (12K)

DMB-1812LH (9K+12K)

Function

Cooling

Heating

Cooling

Heating

Cooling

Heating

Class

Power

AC 220-240V, 50Hz

Capacity

2637.6

3516.8

5275.2

Btu/h

9000

12000

18000

Dehumidification

l/h

1.15

2.10

3.25

Running Current

8.0

8.5

8.0

Electrical

Power Input

1800.0

1850.0

1800.0

Data

Starting Current

49 A

Type

Rotary (Hitachi)

Compressor

Model

SHW33TC4-U

Capacitor

50µF/370VAC

Indoor Unit

Outdoor Unit

Indoor Unit

Outdoor Unit

Fan

Type

Cross flow fan

Propeller fan

Cross flow fan

Propeller fan

Motor

Capacitor

1.0µF 400VAC

5/45µF 400VAC

1.0µF 400VAC

5/45µF 400VAC

Motor Model Number

YDK-8-4B(Xiangming)

OSME-806DERC

YDK-8-4B(Xiangming)

OSME-806DERC

Refrigerant

Control

Capillary

(R-22)

Charge Quality

1700 g

Connection

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

DIMENSIONS	INDOOR UNIT
2. OUTLINE AND		DMB-1812LH (900BTU/h)
	1

Plate Mounting

Connecting Pipe

750	REMOCON

Grille Insert

Frame Grille

Body

Plate Mounting

245

174

DMB-1812LH(12000BTU/h)

Connecting Pipe

406	Plate Mounting

REMOCON

925

Plate Mounting

Body

Frame Grille

Grille Insert

285

Filter - L	Filter - R	194

OUTDOOR UNIT	DMB-1812LH
2

Inlet

325

Foot

Outlet

Cabinet Front

Cover Service

Cabinet Side

Panel Top

Guide Post

Outlet

675

872	Service Valve

Installation Section

BASIC ACCESSORIES

This Installation section explains how and where to connect this new air conditioner. Please read make sure all accessories are included as shown below and read manual thoroughly. This Installation section is provided to assist the person 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 SUPPLIED WITH THE UNIT:

1	2	3		4
			11		12
5	6	7	8	9	10

No.	Description	Qty.	No.	Description	Qty.

1	Wall Bracket	2	7	Foot Cushion	4
2	Outdoor Unit Cover	1	8	Concrete Nails	10
3	Remote Controller	2	9	Remote Holder Screws	6
4	Deodorizing Filter	2	10	Wall Bracket Screws	16
5	Electrostatic Filter	2	11	Wall Cap	4
6	Remote Holder	2	12	Battery	4

Note:

The remainders except for No. 2, 7, 11 are contained in the indoor boxes.

COPPER TUBING:

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.

OPTIONAL ACCESSORIES

ACCESSORIES NOT SUPPLIED WITH THE 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	1		5P x 3m White
		3112704700	1		5P x 3m Red

	Complete Optional	3100400000	1
	Accessories
	(1, 2, 3, 4, 5, 6, 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.

10cm (3.95in)

from ceiling

30cm (11.8in) from side wall

10cm (3.95in) from side wall

At least 30cm (11.8in) from unit

AC Outlet

and Plug

10	cm

3.9 inches

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 2X 4PX6m.

Plug into 220V~240V AC Outlet

	23.6	60
		cm
	inches

60	23.6
cm	23.6
	inches

Wall	Drain
	Hose	Wall
		Cap

Pipes

(Not Supplied)

Connection

(Not Supplied)

Wrap with

Tape

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

	27.6
70	inches
70	cm
(12000
BTU/h)
	(9000BTU/h)	Drain
	Copper	Drain
	Copper	Hose
	Tubing
	Ground Wire
	(Not Supplied)
Connecting cable		1/2" side piping
Signal Wire		1/4" side piping
Signal Wire

Drain Hose

INSTALLATION

SELECTING A SITE:

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.

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.

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.

CAUTION

•Before making hole, make sure there are no studs, pipes, electrical wiring or conduit directly behind the area to be cut.

2.Determine if the hole is to be made at the left or right hole location.

DMB-1812LH

150 mm	60 mm
	(9000BTU/h)
10 mm	10 mm

150 mm	60 mm	DMB-1812LH
150 mm	60 mm	(12000BTU/h)
		(12000BTU/h)
10 mm	10 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

For Concrete, or similar type wall, make holes into the wall and insert concrete nails instead of screws.

INSTALLING THE INDOOR/OUTDOOR WIRE TO THE INDOOR UNIT FOR AC CONNECTION

DMB-1812LH(9000BTU/h)

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.

1.Open the connection cover on the indoor unit to access the connection area.

Connection cover

Remove the Connection

Cover.

•Loosen the screw fixed at the Connection Cover.

•Remove the Connection Cover.

Screw

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 inserted 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:

Blue

Yellow/Green DMB-1812LH

(9000BTU/h)

Brown

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.

Y	L	DMB-1812LH
		(9000BTU/h)

Brown Blue

Yellow/Green

4.Connect the wires to the housing and terminals on the control board individually according to the outdoor uint connection.

Housing & Terminals on the	Terminals
Housing & Terminals on the
indoor unit	Y		L
	Y		L
color of wires	Brown	Yellow/	Blue
		Green
	BLACK/GRAY
	BLACK/GRAY
color of wires
	Brown	Yellow/	Blue
	Brown	Green	Blue
Housing & Terminals on the	Y		L
Housing & Terminals on the
outdoor unit	Terminals
	Terminals

Terminals

Signal

The used connection cable connected to indoor and outdoor unit must be:

1) H07RN-F 3G1.5mm2 (NOT INCLUDED)

DMB-1812LHDMB-1812LH(9000BTU/h)

DMB-1812LH(12000BTU/h)

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.

1. Open the connection cover on the indoor unit to	2. Fish the indoor/outdoor wire from the rear of the
access the connection area.	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:

Connection cover
Remove the Connection Cover.	Blue
Remove the Connection Cover.
Remove the Connection	Yellow/Green
Remove the Connection
Cover.	Brown
	Brown

• Loosen the screw fixed at

the Connection Cover.

DMB-1812LH

• Remove the (12000BTU/h) Connection Cover.

Screw (Special screw)

according to National power supply requirement.

must be replaced by the manufacuturer or its service agent or a similarly qualified per-

cord is not connected to AC power when connecting the indoor/outdoor wire.

sure they are fully inserted and minimum copper wire is exposed. If they are not, shortetc. may occur.

on running a wire from the indoor to the outdoor unit.

in the Terminal Block following figure.

“Y” connection, and the

Y L

Brown Blue

Yellow/Green

DMB-1812LH(12000BTU/h)

4. Connect the wires to the housing and terminals on

the control board individually according to the out -				<INDOOR UNIT (Control Box)>
the control board individually according to the out -
door uint connection.
Housing & Terminals on the	Terminals			Terminals
Housing & Terminals on the				+
indoor unit	Y		L
	Y		L
color of wires	Brown	Yellow/	Blue
		Green
	BLACK/GRAY
	BLACK/GRAY			Signal
				Signal
color of wires
	Brown	Yellow/	Blue
	Brown	Green	Blue
				The used connection cable connected to indoor and
Housing & Terminals on the	Y		L	outdoor unit must be:
	Y		L	1) H07RN-F 3G1.5mm2 (NOT INCLUDED)
				1) H07RN-F 3G1.5mm2 (NOT INCLUDED)
outdoor unit	Terminals
	Terminals
		DMB-1812LH(12000BTU/h)

MOUNTING (INDOOR UNIT)

The Indoor unit must be mounted before connecting the indoor/outdoor wire, drain hose and copper tubing. To mount, follow the procedures below:

1.The tubing can be extended in 4 directions as shown below. No cutting is necessary for left/rear and right/rear tubing connections. If using left or right tubing connections, remove the plastic area with a hacksaw so pipes can go through.

		Right/Rear
	Left/Rear	Tubing
	Left/Rear	Right
Left	Tubing	Right
	Tubing	Tubing
		Tubing
Tubing

2.Make sure the drain hose and copper tubing are wrapped with the rubber insulation. Using the tape, wrap the indoor/outdoor wire, copper tubing and drain hose together.

CAUTION:

•Make sure the 12K Indoor unit’s AC cord is not connected to AC power when performing these procedures.

•Be sure to comply with local codes on running a wire from the indoor to the outdoor unit.

•DO NOT LET THE INDOOR/OUTDOOR WIRE COME IN DIRECT CONTACT WITH THE TUBING OR HOSE!

3. Shape the tubing so it can easily go through the hole
3. Shape the tubing so it can easily go through the hole	Wall Bracket
in the wall. Push the indoor/outdoor wire, copper tub-	Wall Bracket


ing and drain hose through the hole in the wall angling		Insert Putty
downward. Situate the indoor unit on the wall bracket
by lifting the indoor unit slightly above the wall bracket
and then down so it is securely locked in place.


		Drain Hose

PREPARING THE COPPER TUBING (NOT INCLUDED)

A copper tubing extension (not included) may need to be cut. If this is the case, it will also have to be deburred and flared as shown below:

1. Cut the copper tube extension to the desired length		2. Make a flare at the end of the copper tube with a flare
with a tube cutter. It is highly recommended that 1 foot		tool.
is added to the requested length. After cutting, debur-		Make sure the inside surface and edges are smooth
ring may be necessary (see below diagram). Perform		and the sides are uniform length.
this with a tube reamer.
BEFORE	AFTER	Flare nut
		Flare nut
		Connection
		pipe

Flare tool

CAUTION:

• When using the tube reamer, hold the tube downward and make sure no copper scraps fall into the tubing.

Insert Putty

Drain Hose

Wall Bracket

CONNECTING COPPER TUBES

To connect the copper tubes, follow the procedures below:

1.Remove the flare nut stoppers from the inside unit. Determine the location of the copper tubing and where the bends will be. Gently bend the copper tubing, making sure to use big angles so no crimping will occur. Try to do this on the first try as repeated bending may break or crimp the tubing.

2.Remove the plastic stoppers from the tubing. Connect the large and small copper tubing to the respective extension and rotate the flare nut with your finger until a smooth match is made. Make sure the copper extension has foam rubber (insulation) on it.




coupler				Flare Nut

NOTE:

When removing the flare nut stopper from the inside unit, confirm “Ping”, sounds because the mixed gas is charged in the inside unit,

3.Once a smooth match is made, tighten the flare nut using a wrench. Be very careful not to strip the threads or flare nut. Repeat this process for the small and large tubing. When tightening the flare nut, use another wrench to securely hold the coupler from twisting and possibly damaging the tubing.

5.Perform a leak test on all copper tube connections. To prevent heat loss and damage to walls from condensation, the copper tube connections coming from the wall must be insulated. Do this by wrapping foam rubber or equivalent around the connection approximately 8mm thick so no copper tubing is exposed.

4.Remove the flare nut stoppers from the outdoor unit’s valves. Connect the larger copper tubing to the larger valve on the outdoor unit. Connect the smaller copper tubing to the smaller valve on the outdoor unit.

NOTES:

•As with all wiring and hookups on this unit, make sure the AC plug on the 12K indoor unit is unplugged.

•Be very careful not to strip the threads or flare nut.

•When insulating the connections, use foam rubber or equivalent.

CONNECTING THE DRAIN HOSE

To connect the drain hose, follow the procedures below:

1.Connect the drain hose extension to the drain hose coming from the indoor unit by loosing the clamp on the extension using a phillips screwdriver, attaching the hoses together and then tightening the clamp.

2.Run the drain hose, slanted downward, outside. If the drain pipe is exposed

indoors, make sure it is thoroughly insulated so condensation does not ruin walls or furniture or come in contact with the AC connection or extension. Also, do not crease or form a trap in the tubing.

INSTALLING THE INDOOR/OUTDOOR WIRE TO THE OUTDOOR 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.

1.Remove the screw holding on the connection cover. Remove the connection cover on the outdoor unit to access the connection area.

Connection

Cover

2.Route the indoor/outdoor wire into the opening on the outdoor unit and through the wire holder. To connect to the wire holder, loosen the screw on the wire holder, insert the wires through, then tighten the screw.

Brown

Yellow/Gre

Blue

DMB-1812LH

3. Connect the wires to the housing and terminals on the control board individually as the following.

Housing & Terminals on the

Terminals

indoor unit (9K)

color of wires

Brown

Yellow/

Blue

Green

BLACK/GRAY

color of wires

Brown

Yellow/

Blue

Green

Housing & Terminals on the

Terminals

indoor unit (12K)

color of wires

Brown

Yellow/

Blue

Green

Housing & Terminals on the	Y	L
Housing & Terminals on the
outdoor unit		Terminals
		Terminals

NOTES:

•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 inserted 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.

4.To connect wires, loosen the screw in the Terminal Block and insert the correct wires like following figure. Connect the Blue wire to “L” connection, Brown wire to the “Y” connection, the Yellow Green wire to the “ connection”

9K White

12K Red

Signal

The used connection cable connected to indoor and outdoor unit must be ;

1) H07RN-F 3G 1.5mm2 X2 (NOT INCLUDED)

DMB-1812LH

TAPING UP THE WIRE/TUBES/HOSE

After running the wire, hose and tubing outside, tape them up as shown below to insulate.

1.Tape the two copper tubes, drain hose (and the electrical wiring if local codes permit) together with the supplied tape. Make sure the electrical wiring does not come in direct contact with the copper tubing or drain hose. Approximately 1 foot outside the hole, let the drain hose out and separate from the copper tubing and wiring.

Wall braket

Introduceti chit

Drain hose

	Connecting cable	1/2" side piping
	Signal Wire	1/4" side piping
	Signal Wire	Drain Hose
		Drain Hose

2.Begin wrapping from the point the tubing comes out of the outdoor unit and continue to the hole in the wall. Leave no gaps or breaks and cover the entire length of the tubing. As you wrap, overlap the previous turn by half the width of the tape.

3.Wrap the piping joints with the insulator plate and fasten it with vinyl tape.

Insulator Plate

pipe

vinyl tape

4.After wrapping the connection pipe with tape, fasten it to the outside wall with saddles, etc.

Wall cap

Pipe

Tape

Saddle (Not supplied)

APPLYING PUTTY AND INSERTING WALL CAP

After running the wires and tubing outside, putty should be inserted around the opening on the outside to protect against rain, wind, etc. To apply putty, see below:

1.Apply the putty to any area on the outside hole that air or rain can get into.

Apply Putty

Here

Tubing

2.After applying putty, insert the wall Cap at Indoor side and Outdoor side.

Wall Bracket

Insert Putty

	Wall Cap

	(For DS-110R)	Drain Hose
Indoor side		Wall Outdoor side

Before Air Purging

Indoor Unit

After connecting the power supply, open the solenoid

valve by pressing the install switch on the control

panel before air purging or refrigerant charging.

Outdoor Unit

AIR PURGING

After operating the 9K and the 12K indoor units at the same time, execute air purging or refrigerant charging.

Air and moisture remaining in the refrigerant system may create adverse conditions as indicated below:

•pressure in the system rises.

•operating current rises.

•cooling efficiency drops.

•moisture in the refrigerant circuit may freeze and block capillary tubing.

•water may lead to corrosion of parts in the refrigerant system.

Therefore, the indoor unit and tubing between the indoor and outdoor unit must be evacuated to remove moisture from the system. After air puring or refrigerant charging, turn the install switch off.

Manifold Valve

Pressure

Gauge

Lo Hi

AIR PURGING WITH VACUUM PUMP (TEST RUN)

Charge Hose

Confirm each tube (narrow and wide tubes) between the indoor and outdoor units has been properly connected and all wiring for the test run has been completed. Remove the valve caps from the wide and narrow service valves on the outdoor unit. Note that both narrow and wide tube service valves on the outdoor unit are kept closed at this stage (shipping position).

Leak Test

1.With the service valves on the outdoor unit remaining closed, remove the threaded cover on the wide tube service port. (Save for reuse.)

2.Attach a manifold valve (with pressure gauge) and dry nitrogen gas cylinder to this service port with charge hoses.

CAUTION:

Be sure to use a manifold valve for air purging. If it is not avail

able, use a stop valve for this purpose. The “Hi” knob of the

manifold valve must always be kept closed.

3.Pressurize the system to no more than 150 P.S.I.G. with dry nitrogen gas and close the cylinder valve when the gauge reading reaches 150 P.S.I.G. Next, test for leaks with liquid soap.

Nitrogen Gas Cylinder (Vertical Position)

CAUTION:

To avoid nitrogen entering the refrigerant system in a liquid

state, the top of the nitrogen gas cylinder must be higher than its bottom when you pressurize the system. Usually, the cylinder is used in a vertical standing position.

4.Do a leak test of all joints of the tubing (both indoor and outdoor) and both wide and narrow service valves. Bubbles indicate a leak. Be sure to wipe off the soap with a clean cloth.

5.After the system is found to be free of leaks, relieve the nitrogen pressure by loosening the charge hose connector at the nitrogen cylinder. When the system pressure is reduced to normal, disconnect the hose from the cylinder.

Evacuation

1. Attach the charge hose end described in the leak test area to a vacuum pump to evacuate the air remaining at the tubing and indoor unit.

Confirm the “Lo” knob of the manifold valve is open. Then, run the vacuum pump. The operation time for evacuation varies with the tubing length and capacity of the pump. The following table shows the amount of time for evacuation:

Required time for evacuation when 30 gal/h vacuum pump is used

If tubing length is less than	If tubing length is longer than
33 ft. (10 m)	33 ft. (10 m)

10 min. or more	15 min. or more

2.When the desired vacuum is reached, close the “Lo” knob of the manifold valve and stop the vacuum pump.

Indoor Unit

Outdoor Unit

Finishing the job

Manifold Valve

1.With a hex wrench, turn the narrow tube service valve stem counter-clockwise to fully open the valve.

2.Turn the wide tube service valve stem counter-clockwise Pressure

to fully open the valve.	Gauge

Lo Hi

CAUTION:

To avoid gas from leaking when removing the charge hose, make sure the wide tube service valve is fully open and turned all the way out.

3.Loosen the charge hose connected to the wide tube service port slightly to release the pressure, then remove the hose.

4.Replace the threaded cover on the wide tube service port and fasten it securely. This process is very important to prevent gas from leaking from the system.

5.Replace the valve caps at both wide and narrow service valves and fasten them securely.

This completes air purging with a vacuum pump. The air conditioner is now ready to test run..

Charge Hose

Vacuum

Pump

TEST RUN

Check that all tubing and wiring have been completed correctly. Check again that the wide and narrow tube service valves are fully opened. Turn on the power and run the system.

Service Valve Construction

•Valve Position Closed

The valve systems of both the wide and narrow tubes are turned all the way in. The unit is shipped from the factory in this position and it is also used for Pump Down and Air Purging.

•Valve Position Fully Open

The valve stems of both the wide and narrow tubes are turned all the way out. This is normal operating and Test Run position.

•Valve Position Half Open

With the narrow tube valve stem is turned to the halfway-down position. This position is used for pressure measurement and gas charging.

CAUTION:

When opening or closing the service valve stem, be sure to use a hex wrench.

PUMP DOWN

Pump Down means collecting all refrigerant in the outdoor unit without loss in refrigerant gas. This is performed when the unit is to be relocated or the refrigerant circuit is serviced.

CAUTION:

Be sure to perform Pump Down procedure with the unit cooling mode.

Pump Down Procedure (execute the pump down of the 12K and 9K respectively)

1.Connect a low-pressure gauge manifold hose to the charge port on the wide tube service valve.

2.Open the wide tube service valve halfway and purge the air from the manifold hose using the refrigerant gas.

3.Close the narrow tube service valve (all the way in).

4.Turn on the unit’s operating switch and start the cooling operation.

5.When the low-pressure gauge reading becomes 1 to 0.5 kg/cm2 (14.2 to 7.1 psi), fully close the wide tube valve stem and then quickly turn off the unit. At that time, Pump Down has been completed and all refrigerant gas will have been collected in the outdoor unit.

3-Way Valve

3-way valve(Liquid Side)

3-way valve(Gas Side)




Works		Shaft position	Shaft position	Service port

Shipping		Closed	Closed	Closed
		(with valve cap)	(with valve cap)	(with cap)

1	Air purging	Open	Closed	Open
	(Installation)	(counter-clockwise)	(clockwise)	(push-pin or with
				vacuum pump)

Operation		Open	Open	Closed
		(with valve cap)	(with valve cap)	(with cap)

2	Pumping down	Closed	Open	Open (connected
	(Transfering)	(clockwise)	(counter-clockwise)	manifold gauge)

3	Evacuation	Open	Open	Open
	(Servicing)			(with charging cylinder)

4	Gas charging	Open	Open	Open
	(Servicing)			(with charging cylinder)

5	Pressure check	Open	Open	Open
	(Servicing)			(with charging cylinder)

6	Gas releasing	Open	Open	Open
	(Servicing)			(with charging

4. OPERATION

1 NAME AND FUNCTION OF PARTS

DMB-1812LH(9000BTU/h)

Indoor Unit

Deodorizing Filter

Electrostatic Filter

removes bad smells

removes dust and

from the air

Air Inlet

particles from the air

Signal wire

Fan Direction Antibacterial Filter (Up, Down)

removes dust and prohibits germs.

Lamp

Remote

Controller

Receiver

Air Outlet

Remote Controller

DMB-1812LH(12000BTU/h)

Indoor Unit

Electrostatic Filter

Electrostatic Filter removes dust and

particles from the air

Air Inlet		Deodorizing Filter
	Air Inlet	Deodorizing Filter
		removes bad smells
		removes bad smells
		from the air

Signal wire

Antibacterial

Fan

Antibacterial

Air Outlet

FanDirection

Filter

(Up,Down)

Filter

removes dust and prohibits germs.

Remote

Power Cord Remote

Controllertroller

Receiverer

l r	Lamp
RemoteController

DMB-1812LH(9000BTU/h)

Indoor Unit Display

Switch Panel

■Remote Control Signal Receiver

This place is the part to receive the signal if it receives the signal, you can hear the signal “beep”.

ON (Red)						Timer (Yellow)



Lights when the						Lights during the time
operation is going on.						reservation mode.
Air clean (Green)						Quick (Red)

EMR. REMOCON

■ When the remote controller is lost or out- of-order, push the emergency button (EMR.) to operate by hand.

Open the front panel on emergency operating.

Remocon switch is usually used with remote controller.

DMB-1812LH(12000BTU/h)

Indoor Unit Display

■Remote Control Signal Receiver

This place is the part to receive the signal if it receives the signal, you can hear the signal “beep”.

ON	AIR	QUICK TIMER
	CLEAN

ON (Red)	Timer (Yellow)
Lights-on	Lights-on during the time
during the operation	of reservation mode.
Air clean (Green)	Quick (Red)
Lights-on	Lights-on during the time
during the operation	of Quick Mode.

Switch Panel

EMERGENCY REMOTE

■When the remote controller is lost or out- of-order, push the emergency button (EMERGENCY) to operate by hand.

Open the front panel on emergency operating.

Remocon switch is usually used with remote controller.

Outdoor Unit

AIR IN

Connection Cover

Remove cover to access the

AC connection to the indoor unit.

AIR OUT

Service Valves

The indoor and outdoor units are connected by copper tubes which are connected here.

2 REMOTE CONTROLLER

of Each Button

AUTO

Display

Displays information pertaining to unit.

ON/OFF Button

Press to turn the unit on or off.

FAN SPEED Button

Press to select the fan speed (High "", Middle "",

Low "").

MODE Button

Press to cycle through the modes (Auto/Quick/Cooling/Fan/Dry)

SLEEP Button

Press to set the unit for the sleep mode.

TimerIMERO/OFFN/O FButton

Press to set the unitoff or on time.

(0..5, 1, 1..5, 2, 2.5, 3, 4, 5, 6, 8, 8,

10, 12, 16, 20,,24hr)

TIMER ENTER/CANCEL Button

Press to enter a timer setting or to cancel timer setting

			TEMPERATURE Buttons
			Press to raise or lower
			the desired temperature.
MODE	FAN SPEED	FAN DIR.	FAN DIR.	Button
MODE	FAN SPEED	FAN DIR.	Press to select up/down
			Press to select up/down
			direction for fan.
SLEEP
TIMER
ON/OFF	ENTER/	TURBO/MILD
	CANCEL		TURBO/MILD
			Press to be colder the unit.