Heat Controller Inc Air Conditioner DMC24SB 1 User Manual

HEAT CONTROLLER, INC.

Wall Mounted

Mini-Split System

Single-Zone

Air Conditioning/Heat Pump

S ervice M anual

DMC09SB-0/DMH09SB-0

DMC12SB-0/DMH12SB-0

DMC18SB-1/DMH18SB-1

DMC24SB-1/DMH24SB-1

Before servicing the unit, read the

“safety precautions” in this manual.

Only for authorized service personnel.

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.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties only.

■ Meanings of symbols used in this manual are as shown below.

Be sure not to do.

Be sure to follow the instruction.

■ Installation

For electrical work, contact the

dealer, seller, a qualified electri-

cian, or an Authorized Service

Center.

Install the panel and the cover of

control box securely.

Do not install, remove, or re-install

the unit by yourself (customer).

• There is risk of fire or electric shock.

• 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.

Do not install the product on a

defective installation stand.

• Shape edges could cause injury. Be

especially careful of the sharp

edges.

• There is risk of fire, electric shock,

explosion, or injury.

• It may cause injury, accident, or

damage to the product.

Service Manual 3

Safety Precautions

Be sure the installation area does

not deteriorate with age.

Install the indoor unit on the wall

where the height from the floors

more than 8ft(2.4m)

Do not handle the pipe by your-

self(Costomer)

• If the base collapses, the air condi-

tioner could fall with it, causing prop-

erty damage, product failure, and

personal injury.

• There are sharp moving parts that

could cause personal injury.

• High-Pressure refrigent may cause

personal injury.

8ft(2.4m)

■ Operation

Do not allow water to run into

electric part.

Do not let the air conditioner run

for a long time when the humidity

is very high and a door or a win-

dow is left open.

Do not store or use flammable gas

or combustibles near the air condi-

tioner.

• There is risk of fire, failure of the

product, and/or electric shock.

• Moisture may condense and wet or

damage furnishings.

• There is risk of fire or product failure.

Do not use the product in a tightly

closed space for a long time.

When flammable gas leaks, turn off the gas

and open a window for ventilation before

turning the product on. Do not use the tele-

phone or turn switches on or off.

Turn off breaker to the unit if

strange sounds odors or smoke

comes from it.

• Oxygen deficiency could occur.

• There is risk of explosion or fire.

•

There is risk of fire, Product faiure,

and/or electric shock.

•

Some ventilation by opening window is

necessary for the fresh air

4 Room Air Conditioner

Safety Precautions

Stop operation and close any win-

dow in storm or hurricane before

the hurricane arrives.

Do not open the inlet grill of the

product during operation. (Do not

touch the electrostatic filter, if the

unit is so equipped.)

When the product is soaked (flood-

ed or submerged), contact an

Authorized Service Center.

• There is risk of property damage,

failure of product, or electric shock.

• There is risk of physical injury, elec-

tric shock, or product.

• There is risk of electrical shock.

Ventilate the product from time to

time when operating it together

with a stove, etc.

Turn off breaker to the appliance

before performing cleaning or

maintenance.

When the product is not be used

for a long time disconnect the

power supply by turning off the

breaker.

• There is risk of fire or electrical

shock.

• There is risk of electric shock.

• There is risk of product damage or

failure, or unintended operation.

Take care to ensure that nobody could step on or fall

onto the outdoor unit.

Do not insert hands or other objects through the air

inlet or outlet while the air conditioner is on.

• There could result in personal injury and product dam-

age.

• There are sharp and moving parts that could cause per-

sonal injury.

Service Manual 5

Safety Precautions

■ Installation

Always check for gas(refrigerant)

leakage after installation or repair

of product.

Install the drain hose to ensure that Keep level even when installing the

water is drained away properly.

product.

• Low refrigerant levels may cause

product failure.

• A bad connection may cause water

leakage.

• To avoid vibration or water leakage.

90˚

Do not install the product where

the noise or hot air from the out-

door unit could offend neighbors.

Use two or more people to lift and

transport the air conditioner.

Do not install the product where it

will be exposed to sea wind (salt

spray) directly.

• Avoid personal injury.

• It may cause a problem for your

neighbors.

• It may cause corrosion in the prod-

uct. Corrosion, particularly on the

condenser and evaporator fins,

could cause product malfunction or

inefficient operation.

■ Operation

Do not direct airflow at room occu-

pants.

Do not use the product for special

purposes, such as preserving foods,

works of art, etc. It is a consumer air

conditioner, not a precision refrigera-

tion system.

Do not block the inlet or outlet of

air flow.

• This could damage your health.

• There is risk of damage or loss of

property.

• It may cause product failure.

6 Room Air Conditioner

Safety Precautions

Use a soft cloth to clean.

Do not use harsh detergents, sol-

vents, etc.

Do not touch the metal parts of the

product when removing the air fil-

ter. They are very sharp!

Do not step on or put anything on

the product. (outdoor unit)

• There is risk of fire, electric shock or

damage to the plastic parts of the

product.

• There is risk of personal injury.

• There is risk of personal injury and

failure of product.

Always insert the filter securely.

Clean the filter every two weeks or

more often if necessary.

Do not drink the water drained from Use a firm stool or ladder when

the unit.

cleaning or maintaining the air con-

ditioner.

• It is not sanitary and could cause

• A dirty filter reduces the efficiency of

the air conditioner and could cause

product malfunction or damage.

• Be careful and avoid personal injury.

serious health issues.

■ Disuse

Replace all the batteries in the

remote.

Do not recharge or disassemble

the batteries. Do not dispose of

batteries in a fire.

If the liquid from the batteries gets

onto your skin or clothes, wash it

well with clean water. Do not use

the remote if the batteries have

leaked.

• There is risk of fire or explosion.

• They may burn or explode.

• The chemicals in batteries could

cause burns or other health hazards.

Service Manual 7

Dimensions

Indoor Unit

Installation plate

Model

9 Btu Series

(C/O)

9 Btu Series

(H/P)

12 Btu Series

Dimension

mm(inch)

840(33.1)

270(10.6)

153(6.0)

894(35.2)

295(11.6)

165(6.5)

894(35.2)

295(11.6)

165(6.5)

8 Room Air Conditioner

Dimensions

Installation plate

Model

18 Btu Series

24 Btu Series

Dimension

mm(inch)

1090(42.9)

300(11.8)

178(7.0)

1090(42.9)

300(11.8)

178(7.0)

Service Manual 9

Dimensions

Outdoor Unit

1. 9k, 12k

Gas side

(3-way valve)

Liquid side

(2-way valve)

MODEL

unit

9k, 12k

DIM

mm(inch)

770(30.3)

540(21.3)

245(9.6)

287(11.3)

64(2.5)

518(20.4)

10(0.4)

100(3.9)

10 Room Air Conditioner

Dimensions

2. 18k, 24k

MODEL

18k, 24k

DIM

mm(inch)

870(34.3)

655(25.8)

320(12.6)

370(14.6)

25(1.0)

L10

630(24.8)

25(1.0)

546(21.5)

162(6.4)

54(2.1)

74.5(2.9)

79(3.1)

Service Manual 11

Introduction

Symbols Used In This Manual

This symbol alerts you to the risk of electric shock.

This symbol alerts you to hazards that may cause harm to the air condi-

tioner.

This symbol indicates special notes.

NOTICE

Features

Air Inlet

Front Panel

Air Filter

Signal Receptor

Air Intake Vents

Connecting

Wires

Connecting

Wires

Air Intake

Vents

Piping

Air Outlet

Vents

Drain Hose

Air Outlet Vents

Base Plate

12 Room Air Conditioner

Introduction

Installation

Read carefully, and then follow step by step.

Installation Parts

Installation plate

Type "A" screw and plastic anchor

Remote Control Holder

Type "B" screw

Installation Tools

Figure

Name

Figure

Name

Screw driver

Ohmmeter

Electric Drill

Hexagonal wrench

Measuring Tape, Knife

Hole Core Drill

Ammeter

Gas Leak Detector

Thermometer,

Level

Spanner

Torque wrench

Flaring Tool Set

Service Manual 13

Installation

Installation Map

NOTICE

Installation parts you should purchase.

Installation plate

Sleeve

Bushing-Sleeve

Putty(Gum Type Sealer)

Bend the pipe as closely

on the wall as possible,

but be careful that it

doesn't break.

Air Discharge

Operation Indication Lamps/

Signal Receptor

Vinyl tape (Wide)

• Apply after carrying out a

drainage test.

• To carry out the drainage

test, remove the air filters

and pour water into the heat

exchanger.

Forced Operation Button

Saddle

Gas side piping

(Optional Parts)

Air Inlet Vents

Liquid side piping

Additional drain pipe

Air Outlet Vents

Vinyl tape (Narrow)

Drain Hose

Connecting cable

(Optional Parts)

Base Plate

14 Room Air Conditioner

Installation

Confirm The Refrigerant

1. Check the quality label on the indoor and outdoor unit.

2. Make certain that the refrigerant is R-410A.

NOTICE

THIS PRODUCT CONTAINS R-410A REFRIGERANT

1) Different compressor oil

- R-410A(Polyol ester) / R-22(Mineral).

- Do not mix the existing mineral oil.

- Do not apply used pipe, tools and gauges covered with the existing mineral oil.

2) Absorption of moisture

-Compressor’s oil has the high absorption rate of moisture.

3) Composition

- R-410A(R32:R125=50:50wt%).

NOTE: Never mix with other refrigerants

4) High pressure.

- 1.6 times higher than R-22.

- High Pressure refrigerant may cause personal injury.

Do not handle the pipe by yourself (customer) High-pressure refrigerant may cause personal injury.

- manifold gauge ,charging and any piping tools must be dedicated to R-410A systems.

Service Manual 15

Installation

Select The Best Location

6. Use a stud finder to locate studs to prevent

unnecessary damage to the wall.

Indoor unit

1. Do not have any heat or steam near the unit.

2. Select a place where there are no obstacles in

front of the unit.

More than

12cm(4.7in)

3. Make sure that condensation drainage can be

conveniently routed away.

More than

30cm(11.8in)

4. Do not install near a doorway.

More than

30cm(11.8in)

5. Ensure that the space around the left and right

of the unit is more than 30cm(11.8in). The unit

should be installed as high on the wall as possi-

ble, allowing a minimum of 12cm(4.7in) from

ceiling.

More than 2.4meters(8ft)

Install the indoor unit on the wall where the height from the floors more than 2.3meters(7.6ft).

A minimum pipe run of 7.5meters(24.6ft) is required to minimize vibration and excessive noise.

Outdoor unit

5. Select a place so that the warm air and noise

from the air conditioner do not disturb neigh-

bors.

1. If an awning is built over the unit to prevent

direct sunlight or rain exposure, make sure that

heat radiation from the condenser is not

restricted.

2. Ensure that the space around the back and

sides is more than 10cm(3.9in). The front of the

unit should have more than 70cm(27.6in) of

space.

More than

60cm(23.6in)

More than

10cm(3.9in)

3. Do not place animals and plants in the path of

the warm air.

4. Take the air conditioner weight into account and

select a place where noise and vibration are

minimum.

More than

70cm(27.6in)

60cm(23.6in)

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 roof structures or walls, this may result in excessive noise and vibra-

tion, and may be also classed as non serviceable installation.

16 Room Air Conditioner

Installation

Piping Length And Elevation

Standard

Max.

Pipe Size

Additional Refrigerant

g/m(oz/ft)

Capacity

Length

Elevation

length

(Btu/h)

Suction

Evap

m(ft)

3/8"

1/2"

5/8"

1/4"

7.5(25)

15(49)

7.5(25)

15(49)

30(98)

15(49)

20(0.22)

12k

18k

24k

Outdoor unit

Oil trap

Indoor unit

In case more than 5m(16.4ft)

• Capacity is based on standard length and maximum allowance length is on the basis of reliability.

• Oil trap should be installed every 5~7meters (16.4~23.0ft).

Service Manual 17

Installation

How To Mount Installation Plate

The wall you select should be strong and solid enough

to prevent vibration

Installation Plate

1. Mount the installation plate on the wall with

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.

Chassis

Hook

Type “A”

2. Measure the wall and mark the centerline. It is also important to use caution concerning the location of the instal-

lation 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.

Distance (inch)

CHASSIS

(Grade)

C/O

H/P

1.97

2.56

4.13

4.33

2.32

3.35

4.13

4.33

Installation plate

12k C/O, H/P

18k C/O, H/P

24k C/O, H/P

Ø70mm

3.74

4.80

9.25

4.80

Left rear piping

Right rear piping

Drill a Hole In The Wall

• Drill the piping hole with a ø70mm(2.76in) hole

core drill. Drill the piping hole at either the right

or the left with the hole slightly slanted to the out-

door side.

WALL

Indoor

Outdoor

18 Room Air Conditioner

Installation

Flaring Work

Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the follow-

ing procedure.

Cut the pipes and the cable.

1. Use the piping kit accessory or the pipes purchased

locally.

2. Measure the distance between the indoor and the out-

Copper

pipe

Slanted Uneven Rough

90°

door unit.

3. Cut the pipes a little longer than measured distance.

4. Cut the cable 1.5m(59.1in) longer than the pipe length.

Burrs removal

Pipe

1. Completely remove all burrs from the cut cross section

of pipe/tube.

Reamer

2. Put the end of the copper tube/pipe in a downward

direction as you remove burrs in order to avoid drop-

ping burrs into the tubing.

Point down

Putting nut on

Flare nut

• Remove flare nuts attached to indoor and outdoor unit,

then put them on pipe/tube having completed burr

removal.

Copper tube

(not possible to put them on after flaring work)

Flaring work

• Carry out flaring work using flaring tool as shown below.

Firmly hold copper pipe in a die in the dimen-

sion shown in the table above.

Outside diameter

Handle

inch

1/4

3/8

1/2

5/8

inch

Ø6.35

Ø9.52

Ø12.7

Ø15.88

0~0.5

0~1.0

0~0.020

0~0.039

Bar

Yoke

Cone

Copper pipe

Clamp handle

Red arrow mark

Service Manual 19

Installation

Connecting The Piping

Indoor

1. Prepare the indoor unit's piping and drain hose for installation through the wall.

2. Remove the plastic tubing retainer(see the illus-

tration by) and pull the tubing and drain hose

away from chassis.

3. Replace only the plastic tubing holder 1, not the

holder 2 in the original position.

For left rear piping

Route the indoor tubing and the drain

hose in the direction of rear left.

Connecting

cable

Insert the connecting cable into the indoor unit

from the outdoor unit through the piping hole.

Drain pipe

• Do not connect the cable to the indoor unit.

• Make a small loop with the cable for easy con-

nection later.

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.

NOTICE

If the drain hose is routed inside the room, insu-

late the hose with an insulation material* so that

dripping from "sweating"(condensation) will not

damage furniture or floors.

*Foamed polyethylene or equivalent is recom-

mended.

Indoor unit

Spacer

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

Installation plate

8cm

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.

20 Room Air Conditioner

Installation

Connecting the pipings to the indoor unit

and drain hose to drain pipe.

Wrap the insulation material around the

connecting portion.

• Put a couple drops of refrigerant oil on the face

of the flare before assembling taking care not to

add any contaminants.

• Overlap the connection pipe insulation material

and the indoor unit pipe insulation material. Bind

them together with vinyl tape so that there is no

• Align the center of the pipings and sufficiently

tighten the flare nut by hand.

gap.

Plastic bands

Insulation material

Indoor unit tubing

Flare nut Pipings

• Tighten the flare nut with a wrench.

• Wrap the area which accommodates the rear piping

housing section with vinyl tape.

Indoor unit tubing

Torque wrench

Connection pipe

Indoor

unit pipe

Connection

pipe

Flare nut

Vinyl tape

(wide)

Wrap with vinyl tape

Spanner (fixed)

Connecting cable

Outside diameter

Torque

inch

Pipe

Ø6.35

Ø9.52

Ø12.7

Ø15.88

1/4

3/8

1/2

5/8

13.0

30.4

39.8

47.7

Vinyl tape(narrow)

• 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.

• Mount the clamp on the boss with a type "B"

screw.(SE-H/P: 9k, 12k C/O: 12k)

Wrap with vinyl tape

Type "B" screw

Clamp

Drain hose

Boss

Pipe

Vinyl tape(wide)

Drain hose

• When extending the drain hose at the indoor

unit, install the drain pipe.

For right rear piping

Route the indoor tubing and the drain

hose to the required piping hole position.

Drain pipe

Indoor unit drain hose

Vinyl tape(narrow)

Adhesive

Drain hose

Service Manual 21

Installation

Insert the connecting cable into the indoor

unit.

Spanner (fixed)

Flare nut

• Don't connect the cable to the indoor unit.

• Make a small loop with the cable for easy con-

nection later.

Connection pipe

Torque wrench

Indoor unit tubing

Tape the drain hose and the connecting cable.

Outside diameter

Torque

(lbf ft)

13.0

30.4

39.8

47.7

• Connecting cable

inch

1/4

3/8

1/2

5/8

Ø6.35

Ø9.52

Ø12.7

Ø15.88

Tape

Connecting

pipe

• Mount the clamp on the boss with a type "B"

screw.(SE-H/P: 9k, 12k C/O: 12k)

Drain hose

Connecting cable

Type "B" screw

Clamp

Drain hose

Indoor unit installation

Boss

• 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.

• When extending the drain hose at the indoor

unit, install the drain pipe.

Drain hose

Connecting

cable

Indoor unit drain hose

Drain hose

Vinyl tape (narrow)

Adhesive

Connecting the pipings to the indoor unit

and the drain hose to drain pipe.

Wrap the insulation material around the

connecting portion.

• Put a couple drops of refrigerant oil on the face

of the flare before assembling taking care not to

add any contaminants

• 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.

• Align the center of the pipings and sufficiently

tighten the flare nut by hand.

Plastic bands

Insulation material

Indoor unit tubing

Flare nut Pipings

• Tighten the flare nut with a wrench.

22 Room Air Conditioner

Installation

• Wrap the area which accommodates the rear

piping housing section with vinyl tape.

Reroute the pipings and the drain hose

across the back of the chassis.

Indoor

unit piping

Connection

pipe

Vinyl tape

(wide)

Wrap with vinyl tape

Pipe

Piping for

passage through

piping hole

Vinyl tape(narrow)

Connecting cable

Reroute the pipings and the drain hose

across the back of the chassis.

• 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.

Connecting

cable

Drain hose

Pipe

Drain hose

Vinyl tape(narrow)

Wrap with

vinyl tape(wide)

Service Manual 23

Installation

Installation Information. For left piping. Follow the instruction below.

Correct case

• Press on the upper side of clamp and unfold the tubing to downward slowly.

Incorrect case

• Following bending type from right to left may cause damage to the tubing.

24 Room Air Conditioner

Installation

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.

■■Drain pan

■■Rubber cap

■■Drain hose

■■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.

Connection Of Piping -Outdoor

Put a couple drops of refrigerant oil on

the face of the flare before assembling

taking care not to add any contaminants.

Outdoor unit

Suction Line piping

(Bigger diameter)

Align the center of the pipings and suffi-

ciently tighten the flare nut by hand.

Evaporator Line

piping

(Smaller

diameter)

Finally, tighten the flare nut with torque

wrench until the wrench clicks.

Torque wrench

• When tightening the flare nut with torque

wrench, ensure the direction for tightening fol-

lows the arrow on the wrench.

Outside diameter

Torque

(lbf ft)

13.0

30.4

39.8

47.7

inch

1/4

3/8

1/2

5/8

3/4

Ø6.35

Ø9.52

Ø12.7

Ø15.88

Ø19.05

Service Manual 25

Installation

Connection Of The Cable

1. Remove the cover control from the unit by

loosening the 3 screws.

Wiring Diagram

Connecting cable(Low voltage)

Indoor Unit

Outdoor Unit

2. Dismount caps on the conduit panel.

Terminal

(4P)

Terminal

(6P)

3. Temporarily mount the conduit tubes on the

conduit panel.

Power supply

4. Properly connect both the power supply and

low voltage lines to the corresponding ter-

minals on the terminal block.

L1*

branch

circuit

5. Ground the unit in accordance with local

codes.

Ground

6. Be sure to size each wire allowing several

inches longer than the required length for

wiring.

L1 is neutral for 115V models.

NOTICE

7. Use lock nuts to secure the conduit tubes.

shows field wiring.

2. Separately wire the high and low voltage line.

NOTICE

Connector trade size for this unit is 1/2" for

instructions on connecting depending on

the wire type you are using.

3. Use heat-proof electrical wiring capable of

withstanding temperatures up to 167°F(75°C).

4. Use outdoor and waterproof connection cable

rated more than 300V for the connection

between indoor and outdoor unit.

(For example, Type SJOW)

• 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).

Outdoor unit

Terminal block

• Every wire must be connected firmly.

Over 5mm

• No wire should be allowed to touch refrig-

erant tubing, the compressor or any mov-

ing parts.

(0.2")

Conduit panel

Connecting

cable

Power Supply

Power supply

cord

AWG(MIN.)

AWG MCA

MOP(MAXIMUN OVER-

Model

Power source

CURRENT PROTECTION)

Cover control

9k Cooling

9k Heating

1ø, 115V

8.6

14 14.3

12k Cooling 1ø, 115V

12k Heating 1ø, 115V

18k Cooling 1ø, 230/208V 14 13.6

18k Heating 1ø, 230/208V 14(12) 17.7

24k Cooling 1ø, 230/208V 14(12) 17.7

24k Heating 1ø, 230/208V 14(12) 17.7

26 Room Air Conditioner

Installation

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) Confirm that the starting voltage is maintained at more than 90 percent of the rated volt-

age 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.

7) Always install an GFCI 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, open fuse, disturbance of

the normal 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(0.12in) in each

active(phase) conductors.

Service Manual 27

Installation

Checking The Drainage

• Pour a glass of water on the drain pan.

• Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the

drain exit.

Connecting area

drain hose

Leakage

checking

Drain pan

Drain

hose

Leakage

checking

Drain piping

• The drain hose should point downward for easy drain flow.

Downward slope

• Avoid these situations.

Accumulated

drain water

Do not raise

Less than

50mm gap

Tip of drain hose

dipped in water

Air

Water

leakage

Water

leakage

Water

leakage

Waving

Ditch

28 Room Air Conditioner

Installation

Forming The Piping

In cases where the Outdoor unit is

installed above the Indoor unit perform

the following.

Form the piping by wrapping the connect-

ing portion of the indoor unit with insula-

tion material and secure it with two kinds

of vinyl tapes.

• Tape the piping and connecting cable from

down to up.

• 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 appro-

priately.

• 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 equiva-

lent.

In cases where the outdoor unit is

installed below the indoor unit perform the

following.

Seal a small opening

around the pipings

with gum type sealer.

Trap

• 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 small openings

around pipings with a

gum type sealer.

Trap

Taping

Drain

hose

Pipings

Connecting

cable

Trap is required to prevent water

from entering into electrical parts.

Service Manual 29

Installation

Air Purging

Air and moisture remaining in the refrigerant system have undesirable effects as indicated below.

• Pressure in the system rises.

• Operating current rises.

• Cooling(or heating) efficiency drops.

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

• Water may lead to corrosion of parts in the refrigeration system.

Therefore, the indoor unit and tubing between the indoor and outdoor unit must be leak tested and

evacuated to remove any noncondensables and moisture from the system.

Air purging With Vacuum Pump

Preparation

• Do a leak test of all joints of the tubing(both

• Check that each tubing(both liquid and gas side

tubes) between the indoor and outdoor units have

been properly connected and all wiring for the test

run has been completed. Remove the service

valve caps from both the gas and the liquid side on

the outdoor unit. Note that both the liquid and the

gas side service valves on the outdoor unit are

kept closed at this stage.

indoor and outdoor) and both gas and liquid side

service valves.

Bubbles indicate a leak. Be sure to wipe off the

soap with a clean cloth.

• 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.

Leak test

• Connect the manifold valve(with pressure gauges)

and dry nitrogen gas cylinder to this service port

with charge hoses.

Manifold valve

Pressure

Indoor unit

gauge

Be sure to use a manifold valve for air purging. If it

is not available, use a stop valve for this purpose.

The "Hi" knob of the manifold valve must always be

kept close.

Charge hose

Outdoor unit

Nitrogen gas

cylinder(in vertical

standing position)

• Pressurize the system to no more than 150

P.S.I.G. with dry nitrogen gas and close the cylin-

der valve when the gauge reading reached 150

P.S.I.G. Next, test for leaks with liquid soap.

To avoid nitrogen entering the refrigerant system in

a liquid state, the top of the cylinder must be higher

than its bottom when you pressurize the system.

Usually, the cylinder is used in a vertical standing

position.

30 Room Air Conditioner

Installation

Soap water method

(1) Remove the caps from the gas side and liquid side

valves.

Suction Line

(2) Remove the service-port cap from the gas side

valve.

(3) To open the gas side valve turn the valve stem

counterclockwise approximately 90°, wait for about

2~3 seconds, and close it.

(4) Apply a soap water or a liquid neutral detergent on

the indoor unit connection or outdoor unit connec-

tions by a soft brush to check for leakage of the con-

necting points of the piping.

Evaporator Line

3-way valve

(Close)

3-way valve

(Open)

(5) If bubbles come out, the pipes have leakage.

Cap

Evacuation

Hexagonal wrench

• Connect the charge hose end described in the

preceding steps to the vacuum pump to evacuate

the tubing and indoor unit.

Confirm the "Lo" knob of the manifold valve is

open. Then, run the vacuum pump.

Indoor unit

The operation time for evacuation varies with tub-

ing length and capacity of the pump. The follow-

ing table shows the time required for evacuation.

Required time for evacuation when 4 CMF vacu-

um pump is used

if tubing length is longer

than 10m (33 ft)

If tubing length is less

than 10m (33 ft)

Outdoor unit

10 min. or more

15 min. or more

• When the desired vacuum is reached, close the

"Lo" knob of the manifold valve and stop the vac-

uum pump.

Finishing the job

• With a service valve wrench, turn the valve stem

of liquid side valve counter-clockwise to fully

open the valve.

Manifold valve

Pressure

gauge

• Turn the valve stem of gas side valve counter-

clockwise to fully open the valve.

• Loosen the charge hose connected to the gas

side service port slightly to release the pressure,

then remove the hose.

Open

• Replace the flare nut and its bonnet on the gas

side service port and fasten the flare nut securely

with an adjustable wrench. This process is very

important to prevent leakage from the system.

• Replace the valve caps at both gas and liquid

side service valves and fasten them tight.

Vacuum pump

This completes air purging with a vacuum pump.

The air conditioner is now ready to test run.

Service Manual 31

Installation

Charging

■ Each outdoor unit is factory charged (nameplate charge) for the evaporator as well as a 7.5m(25ft)

line set. Any time a line set is used either shorter or longer then the nominal 7.5m(25ft) line set

length the refrigerant charge has to be adjusted.

■ Whether the line set is made shorter or longer you must adjust the charge based on how many ft of

tubing are either added or removed based on 20g(0.22oz) of R-410A per meter(foot).

Standard

Length

m(ft)

Max.

Pipe Size

Capacity

(Btu/h)

Elevation

length

Suction

Evap

m(ft)

3/8"

1/2"

5/8"

1/4"

7.5(25)

15(49)

7.5(25)

15(49)

30(98)

15(49)

20(0.22)

12k

18k

24k

Example: A 30ft line set is used

5 additional ft X 0.22 ounce per foot= add 1.1 ounces of R-410A

Important:(Unit is critically charged)

If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit nameplate charge

adjusting for line sets longer or shorter than 7.5m(25ft).

Confirm the refrigerant R-410A. Use manifold gauge and hose for R-410A.

32 Room Air Conditioner

Test Running

1. Check that all tubing and wiring have been

properly connected.

2. Measure the temperature of the intake and discharge

of air.

2. Check that the gas and liquid side service

valves are fully open.

3. Ensure the difference between the intake tem-

perature and the discharge is more than

14.4°F(8°C) (Cooling) or (Heating).

Prepare remote control

Intake temperature

1. Remove the battery cover

by pulling it according to the

arrow direction.

Discharge air

2. Insert new batteries making

sure that the (+) and (–) of

battery are installed correctly.

Discharge

temperature

3. Reattach the cover by

pushing it back into position.

4. For reference; the gas side pressure of optimum

condition is as below.(Cooling)

NOTE:

• Use 2 AAA(1.5volt) batteries. Do not use

rechargeable batteries.

Outside ambient TEMP.

The pressure of the gas side service valve

95°F(35°C)

8.5~9.5kg/cm²G(120~135 P.S.I.G.)

• Remove the batteries from the remote control if

the system is not going to be used for a long

time.

NOTE: If the actual pressure are higher than

shown, the system is most likely over-

charged, and charge should be removed. If

the actual pressure are lower than shown,

the system is most likely undercharged,

and charge should be added.

Settlement of outdoor unit

I Anchor the outdoor unit with a bolt and

nut(ø10mm(0.39in) tightly and horizontally on a

concrete or rigid mount.

The air conditioner is now ready for use.

PUMP DOWN

I 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.

This is performed when the unit is to be relocated

or the refrigerant circuit is serviced.

Pump Down means collecting all refrigerant in the out-

door unit without loss of refrigerant.

I In the case when the vibration of the unit is con-

veyed to the hose, secure the unit with an anti-

vibration rubber.

CAUTION:

Be sure to perform Pump Down procedure with the unit

cooling mode.

Bolt

Pump Down Procedure

1. Connect a low-pressure gauge manifold hose to the

charge port on the gas side service valve.

2. Open the gas side service valve halfway and purge the

air from the manifold hose using the refrigerant gas.

3. Close the liquid side 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

0.5kg/cm²G(14.2 to 7.1 P.S.I.G.), fully close the gas

side valve stem and then quickly turn off the unit. At that

time, Pump Down has been completed and all refriger-

ant will have been collected in the outdoor unit.

Tubing connection

Evaluation of the performance

Operate unit for 15~20 minutes, then check the

system refrigerant charge:

1. Measure the pressure of the gas side service valve.

Service Manual 33

Operation

Function of Controls

• DISPLAY

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)

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 compres-

sor 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)

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.

I Cooling Mode Operation

• When the intake air temperature reaches 0.5°C(0.9°F) below the setting temp, the compressor and

the outdoor fan stop.

• When it reaches 0.5°C(0.9°F) above the setting temp, they start to operate again.

Compressor ON Temp

Compressor OFF Temp

➲ Setting Temp+0.5°C(0.9°F)

➲ Setting Temp-0.5°C(0.9°F)

• 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.

I Healthy Dehumidification Mode

• When the dehumidification operation input by the remote control is received, the intake air tempera-

ture is detected and the setting temp is automatically set according to the intake air temperature.

26°C(78.8°F) ≤ Intake Air Temp

➲ 25°C(77°F)

24°C(75.2°F) ≤ Intake Air Temp<26°C(78.8°F) ➲ Intake Air Temp-1°C(1.8°F)

18°C(64.4°F) ≤ Intake Air Temp<24°C(75.2°F) ➲ Intake Air Temp-0.5°C(0.9°F)

Intake Air Temp<18°C(64.4°F)

➲ 18°C(64.4°F)

34 Room Air Conditioner

Operation

• 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 dehu-

midification operation and 4-min compressor off repeat.

Compressor ON Temp. ➲ Setting Temp+0.5°C(0.9°F)

Compressor OFF Temp. ➲ Setting Temp-0.5°C(0.9°F)

• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.

I Heating Mode Operation

• When the intake air temp reaches +3°C(5.4°F) above the setting temp, the compressor is turned

off. When reaches the setting temp, the compressor is turned on.

Compressor ON Temp. ➲ Setting Temp.

Compressor OFF Temp. ➲ Setting Temp.+3°C(5.4°F)

• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when

above 28°C(82.4°F) , it operates with the low or setting airflow speed. When the indoor pipe temp is

between 20°C and 28°C(82.4°F), 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(91.4°F),

when above 35°C(95°F) , it operates with the low airflow speed.

• If overloaded while in heating mode operation, in order to prevent the compressor from OLP opera-

tion, 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.

I Defrost Control

• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from

freezing, reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.

• After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not

and the time of defrost control are determined according to the following conditions.

1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is

compared with the present indoor pipe temperature to get the difference of the indoor pipe temper-

atures (=the maximum temperature of indoor pipe & the present temperature of indoor pipe),

according to which, whether to carry out defrost control or not is determined.

2) According to the need of defrost control shown above and the elapsed time of heating mode opera-

tion at that moment, the defrost control time is determined.

3) When the determined time of defrost control is below 7 min, heating mode operation continues

without carrying out defrost control. According to the procedure stated above, the determination is

made again. When the defrost control time is 7 min or longer, defrost control is then carried out.

• While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with

the present temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the pre-

sent temperature of the indoor pipe & the minimum temperature of the indoor pipe). When the differ-

ence is 5°C(41°F) or higher, defrost control is completed and heating mode operation is carried out.

• While in defrost control, if the defrost time determined before the start of defrost control is complet-

ed, defrost control stops and heating mode operation is carried out regardless of the above condi-

tion.

• When the indoor pipe temp is 42°C(107.6°F) or above, defrost control is not carried out even if the

condition is one of the defrost conditions above.

• While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way

valve are off.

Service Manual 35

Operation

■■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.

■■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 tempera-

ture increases by 1°C(1.8°F). After another 30 min elapse, it increases by 1°C(1.8°F) 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 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(64.4°F)

• 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(64.4°F).

• 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.

36 Room Air Conditioner

Operation

■ Forced operation

• Operation procedures when the remote control can't be used.

• The operation will be started if the power button is pressed.

• If you want to stop operation, re-press the button.

Heat pump Model

Cooling Model

Room Temp. ≥ 24°C(75.2°F) 21°C(69.8°F) ≤ Room Temp. < 24°C(75.2°F) Room Temp. < 21°C(69.8°F)

Operating mode

Indoor FAN Speed

Setting Temperature

Cooling

High

Cooling

High

Healthy Dehumidification

High

Heating

High

22°C(71.6°F)

23°C(73.4°F)

24°C(75.2°F)

• While in forced operation, the key input by the remote control has no effect and the buzzer sounds

10 times to indicate the forced operation.

■ Test operation

•

During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of

room temperature and resets in 18±1 minutes.

•

During test operation, if remote controller signal is received, the unit operates as remote controller

sets.

If you want to use this operation, open the front panel upward and Press the power button let it be

pressed for about 3 seconds.

•

If you want to stop the operation, re-press the button.

■ Auto restart

•

In case the power comes on again after a power failure, Auto Restarting Operation is the function to

operate procedures automatically to the previous operating conditions.

■ 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.

Service Manual 37

Operation

Display Function

1. Heating Model

2. Cooling Model

Operation Indicator

• Cooling, Soft Dry, Fan, Heating

• Cooling, Soft Dry, Fan

Compressor on Indicator

Deicer Indicator

• Hot-start, Deice

Self-diagnosis Function

Error

Code

Error Display LED

(Indoor body operation LED)

Error contents

SVC check point

• Indoor room temperature

thermistor open/short

• Indoor pipe temperature

thermistor open/short.

• Indoor Thermistor

assembly check

(once)

3sec

38 Room Air Conditioner

Operation

Remote Control Operations

The controls will look like the following.

1. START/STOP BUTTON

Operation starts when this button is pressed and

stops when the button is pressed again.

Signal transmitter

2. OPERATION MODE SELECTION BUTTON

Used to select the operation mode.

3. ROOM TEMPERATURE SETTING BUTTONS

Used to select the room temperature.

4. INDOOR FAN SPEED SELECTOR

Used to select fan speed in four steps

low, medium, high and CHAOS.

5. JET COOL

Used to start or stop the speed cooling.(speed cooling

operates super high fan speed in cooling mode.)

6. CHAOS SWING BUTTON

Used to stop or start louver movement and set

the desired up/down airflow direction.

7. ON/OFF TIMER BUTTONS

Used to set the time of starting and stopping operation.

(See page 22)

CANCEL

SET

OFF

8. TIME SETTING BUTTONS

AUTO CLEAN

Used to adjust the time. (See page 22)

9. TIMER SET/CANCEL BUTTON

Used to set the timer when the desired time is obtained and

to cancel the Timer operation. (See page 22)

10. SLEEP MODE AUTO BUTTON

Used to set Sleep Mode Auto operation.

(See page 22)

11. AIR CIRCULATION BUTTON

Used to circulate the room air without cooling or heating.

(See page 23)

Flip-up door

(opened)

12. ROOM TEMPERATURE CHECKING BUTTON

Operation Mode

Used to check the room temperature.

13. NEO PLASMA(OPTIONAL)

Used to start or stop the plasma-purification function. (See

page 20)

Cooling Operation

Auto Operation or Auto Changeover

Healthy Dehumidification Operation

14. HORIZONTAL AIRFLOW DIRECTION CONTROL

BUTTON (OPTIONAL)

Used to set the desired horizontal airflow direction.

15. RESET BUTTON

Used prior to resetting time.

Heating Operation

16. 2nd F Button

Used prior to using modes printed in blue at the bottom of

buttons. (See page 21)

•

Cooling Model( ), Heat Pump Model(

)

17. AUTO CLEAN (OPTIONAL)

Used to set Auto Clean mode.

18. ˚C TO ˚F SWITCHING BUTTON

Used to switch temperature reading from Centigrade to

Fahrenheit.

Service Manual 39

Operation

Disassembly

Indoor Unit

Disconnect the unit from power supply before mak-

ing 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.

1. Before removing the control box, be sure to

take out the wire screwed at the other end.

Earth

Conductor

40 Room Air Conditioner

Disassembly

2. To remove the Control Box.

• Remove securing screws.

• Pull the control box out from the chassis

carefully.

Screw

3. To remove the Discharge Grille.

• Unhook the discharge grille and pull the

discharge grille out from the chassis carefully.

4. To remove the Evaporator.

• Remove 3 screws securing the evaporator(at the

left 2EA in the Eva Holder, at the right 1EA).

• When repair, do not damage the Caution label.

Service Manual 41

Disassembly

• Unhook the tab on the right inside of the chassis

at the same time, slightly pull the evaporator

toward you until the tab is clear of the slot.

5. To remove the Motor Cover

• Remove 2 securing screw.

• Pull the motor cover out from the chassis

carefully.

Motor cover

6. To remove the Cross-Flow Fan

• Loosen the screw securing the cross-flow fan to

the fan motor (do not remove).

Bearing

• Lift up the right side of the cross-flow fan and the

fan motor, separate the fan motor from the

cross-flow fan.

Cross-flow fan

• Remove the left end of the cross-flow fan from

the self-aligning bearing.

42 Room Air Conditioner

Troubleshooting Guide

Refrigeration Cycle Diagram

(1) Cooling Only Models

INDOOR UNIT

OUTDOOR UNIT

LIQUID SIDE

CAPILLARY TUBE

HEAT

EXCHANGE

(EVAPORATOR)

EXCHANGE

(CONDENSER)

GAS SIDE

COMPRESSOR

(2) Cooling & Heating Models

INDOOR UNIT

OUTDOOR UNIT

CHECK VALVE

(Heating Model only)

LIQUID SIDE

3-WAY VALVE

CAPILLARY TUBE

HEAT

EXCHANGE

(EVAPORATOR)

EXCHANGE

(CONDENSER)

GAS SIDE

REVERSING

VALVE

(Heating Model Only)

3-WAY VALVE

ACCUMU

LATOR

COOLING

COMPRESSOR

HEATING

Service Manual 43

Troubleshooting Guide

2-way, 3-way Valve

2-way Valve (Liquid Side)

3-way Valve (Gas Side)

Valve cap

Hexagonal wrench (4mm)

Open position

Closed position

Flare nut

Open position

Closed position

piping

Service

port cap

Service

port

connection

To outdoor unit

Works

Shaft position

Service port

Closed

(with valve cap)

Closed

(with valve cap)

Closed

(with cap)

Shipping

Air purging

Open

Closed

Open

(Installation)

(counter-clockwise)

(clockwise)

(push-pin or with

vacumm pump)

Open

(with valve cap)

Open

(with valve cap)

Closed

(with cap)

Operation

Closed

(clockwise)

Open

Pumping down

(Transfering)

(counter-clockwise) (connected manifold

gauge)

Open

(with charging

cylinder)

Evacuation

(Servicing)

Open

(with charging

cylinder)

Gas charging

(Servicing)

Open

Pressure check

(Servicing)

(with charging

cylinder)

Open

(with charging

cylinder)

Gas releasing

(Servicing)

44 Room Air Conditioner

Troubleshooting Guide

Pumping Down

Liquid side

2-Way

Indoor unit

Outdoor unit

Open

valve

Gas side

Closed

3-Way

valve

Purge the air

• Procedure

(6) Operate the air conditioner at the cooling

cycle and stop it when the gauge indi-

cates 1kg/cm²g.

(1) Confirm that both the 2-way and 3-way

valves are set to the open position.

– Remove the valve stem caps and confirm

that the valve stems are in the raised posi-

tion.

(7) Immediately set the 3-way valve to the

closed position.

– Be sure to use a hexagonal wrench to

operate the valve stems.

– Do this quickly so that the gauge ends up

indicating 3 to 5kg/cm²g.

(2) Operate the unit for 10 to 15 minutes.

(8) Disconnect the charge set, and mount the

2-way and 3-way valve’s stem nuts and

the service port nut.

(3) Stop operation and wait for 3 minutes,

then connect the charge set to the service

port of the 3-way valve.

– Use torque wrench to tighten the service

port nut to a torque of 1.8 kg.m.

– Be sure to check for gas leakage.

– Connect the charge hose with the push pin

to the service port.

(4) Air purging of the charge hose.

– Open the low-pressure valve on the charge

set slightly to air purge from the charge

hose.

Do not use the existing charge set for R-22.

It is necessary to use new charge set for R-

410A. The pressure of R-410A is 1.6 times

higher than that of R-22. Thus, the high pres-

sure side gauge of charge set should be used

higher pressure gauge of 50kg/cm²range.

(5) Set the 2-way valve to the closed position.

Service Manual 45

Troubleshooting Guide

Balance Refrigerant of the 3-way Valve

(Gas leakage)

Liquid side

Indoor unit

Outdoor unit

3-Way

valve

Open

Gas side

3-Way

valve

Open

OPEN

• Procedure

(1) Confirm that both the 2-way and 3-way

valves are set to the back seat.

(3) Open the valve (Lo side) on the charge set

and discharge the refrigerant until the

gauge indicates 0 kg/cm²G.

(2) Connect the charge set to the 3-way

valve’s port.

– If there is no air in the refrigerant cycle (the

pressure when the air conditioner is not

running is higher than 1 kg/cm²G), dis-

charge the refrigerant until the gauge indi-

cates 7.1PSI. if this is the case, it will not

be necessary to apply a evacuatin.

– Leave the valve on the charge set closed.

– Connect the charge hose to the service

port.

– Discharge the refrigerant gradually; if it is

discharged too suddenly, the refrigeration

oil will also be discharged.

46 Room Air Conditioner

Troubleshooting Guide

Evacuation

(All amount of refrigerant leaked)

Liquid side

Indoor unit

Outdoor unit

3-Way

valve

Open

Gas side

3-Way

valve

Open

Vacuum pump

OPEN

• Procedure

(1) Connect the vacuum pump to the center

hose of charge set center hose

(3) Close the valve (Lo side) on the charge

set, turn off the vacuum pump, and con-

firm that the gauge needle does not move

(approxima-tely 5 minutes after turning off

the vacuum pump).

(2) Evacuation for approximately one hour.

– Confirm that the gauge needle has moved

toward -76 cmHg (vacuum of 4 mmHg or

less).

(4) Disconnect the charge hose from the vac-

uum pump.

– Vacuum pump oil.

If the vacuum pump oil becomes dirty or

depleted, replenish as needed.

Use vacuum pump equipped with check value

applied to be prevented from flowing backward.

Service Manual 47

Troubleshooting Guide

Gas Charging

(After Evacuation)

Liquid side

3-Way

Indoor unit

Outdoor unit

Open

valve

Gas side

Open

3-Way

valve

Check valve

Charging

cylinder

(1)

OPEN

• Procedure

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.

(1) Connect the charge hose to the charging

cylinder.

– Connect the charge hose which you dis-

connected 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.

(4) Immediately disconnect the charge hose

from the 3-way valve’s service port.

– Stopping partway will allow the gas to be

discharged.

(2) Purge the air from the charge hose.

– Open the valve at the bottom of the cylin-

der 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.

– If the system has been charged with liquid

refrigerant while operating the air condi-

tioner turn off the air conditioner before

disconnecting the hose.

(3) Open the valve (Lo side on the charge set

and charge the system with liquid refrig-

erant.

(5) Mount the valve stem nuts and the service

port nut.

– If the system can not be charged with the

specified amount of refrigerant, it can be

charged with a little at a time (approximate-

ly 0.33 lb each time) while operating the air

conditioner in the cooling cycle; however,

one time is not sufficient, wait approxi-

mately 1 minute and then repeat the pro-

cedure (pumping down-pin).

– Use torque wrench to tighten the service

port nut to a torque of 13 lb·ft.

– Be sure to check for gas leakage.

This unit is charged with R-410A.

Pay attention not to charge R-22.

48 Room Air Conditioner

Troubleshooting Guide

Additional gas charging

(Gas leakage)

• When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal oper-

ating suction pressure.

• Use the graph or the equation below to get operating suction pressure according to indoor and out-

door temperature.

Suction pressure was measured at 3-way valve service port after operating the unit for 10 minutes.

The method of using graph

- Find outdoor temperature.

- Find indoor temperature onto the curve of outdoor temperature.

- Read suction pressure at the axis of ordinates.

The method of using equation

-. Calculate suction pressure after putting indoor and outdoor temperature into the equation.

Operating Suction Pressure (For R410A)

(According to Indoor & Outdoor Temperature)

(At operating the Unit for 10 minutes)

184.9

122˚F

170.7

104˚F

156.5

142.2

128

86˚F

68˚F

50˚F

0˚F

113.8

99.5

71.1

104

Indoor Temp. (˚F)

Service Manual 49

Troubleshooting Guide

Cycle Parts

Trouble analysis

1. Check temperature difference between intake and discharge air and operating current.

Temp. difference : approx. 0°F(0°C)

• All amount of refrigerant leaked

out. Check refrigeration cycle.

Current

: less than 80% of

rated current

Temp. Difference

Operating Current

• Refrigerant leakege

Clog of refrigeration cycle

Defective compressor

Temp. difference : approx. 14°F(8°C)

Current

: less than 80% of

rated current

Temp. difference : less than 14°F(8°C)

• Excessive amount of refrigerant

• Normal

Current

: over the reated

current

Temp. difference : over 14°F(8°C)

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 valve)

Cause of Trouble

Description

Defective compressor

Defective 4-way reverse valve

Current is low.

High

Higher

Excessive amount of

refrigerant

High pressure does not quickly

rise at the beginning of

operation.

Normal

Insufficient amount of

refrigerant (Leakage)

Clogging

Current is low.

Lower

Higher

NOTICE

1. The suction pressure is usually 120.9~135.1PSI(Cooling) at normal condition.

2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with

putty.

50 Room Air Conditioner

Troubleshooting Guide

Electronic Parts (9k model)

Product does not operate at all.

(* Refer to Electronic Control Device drawing and Schematic diagram.)

Turn off Main Power

(After 20 seconds)

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

YES

Primarily, the operating condition of Micom is OK.

Check the voltage of power(About AC 115V, 60Hz)

• Main power's voltage

• Voltage applied to the unit

• Connecting method of Indoor/Outdoor connecting

cable

• Check PWB Ass'y(Outdoor unit)

- Fuse

Check each load(Indoor/Outdoor Fan Motor,

Compressor, Stepping Motor) and contacting

condition of related connector(including connecting

cable of Indoor/Outdoor Unit)

- Pattern damage

- Varistor(ZNR01J)

Check the connection housing for contacting

• Connector related to CN-POWER

• Connector related to CN-FAN

• Connector contacting of Outdoor Fan/Compressor

• Display PWB Ass'y Check

• Connector related to CN-DC/DC

PCB Board Operation Check

Content

Remedy

Items

• Power Transformer

(Outdoor unit)

- Input Voltage

- Output Voltage

- About AC115V 10% - Check the power voltage

• Replace SMPS

Module

- About DC15V 3

• IC01D(7812) Output

(Indoor/Outdoor unit)

• DC 12V

• Replace IC01D

• IC02D(7805) Output (Indoor unit)

IC03D(7805) Output (Outdoor unit)

• DC 5V

• Replace

IC02D(Indoor unit)

IC03D(Outdoor unit)

• IC01A(KIA7036, Reset IC)

OSC01B(4MHz)

(Indoor/Outdoor unit)

• Voltage of Outdoor unit Micom No. 18,

Voltage of Indoor unit Micom No. 43 and

soldering condition

• Replace faulty parts

Service Manual 51

Troubleshooting Guide

Electronic Parts (18k model)

Product does not operate at all.

(* Refer to Electronic Control Device drawing and Schematic diagram.)

Turn off Main Power

(After 20 seconds)

Turn on Main Power

Does "beeping" sound is made from the Indoor Unit?

YES

Primarily, the operating condition of Micom is OK.

Check the voltage of power(About AC 208V/AC 230V, 60Hz)

• Main power's voltage

• Voltage applied to the unit

• Connecting method of Indoor/Outdoor connecting

cable

• Check PWB Ass'y(Outdoor unit)

- Fuse

Check each load(Indoor/Outdoor Fan Motor,

Compressor, Stepping Motor) and contacting

condition of related connector(including connecting

cable of Indoor/Outdoor Unit)

- Pattern damage

- Varistor(ZNR01J)

Check the connection housing for contacting

• Connector related to CN-POWER

• Connector related to CN-FAN

• Connector contacting of Outdoor Fan/Compressor

• Display PWB Ass'y Check

• Connector related to CN-DC/DC

PCB Board Operation Check

Content

Remedy

Items

• Power Transformer

(Outdoor unit)

- Input Voltage

- Output Voltage

- About AC 208V/AC 230V 10%

• Replace SMPS

Module

- Check the power voltage

- About DC15V 3

• IC01D(7812) Output

(Indoor/Outdoor unit)

• Replace IC01D

• DC 12V

• IC02D(7805) Output (Indoor unit)

IC04D(7805) Output (Outdoor unit)

• Replace

IC02D(Indoor unit)

IC04D(Outdoor unit)

• DC 5V

• IC01A(KIA7036, Reset IC)

OSC01B(4MHz)

(Indoor/Outdoor unit)

• Voltage of Outdoor unit Micom No. 18,

Voltage of Indoor unit Micom No. 43 and

soldering condition

• Replace faulty parts

52 Room Air Conditioner

Troubleshooting Guide

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.)

Caused by other parts except the remote controller

Cause by the remote controller

When the mark(

battery.

) is displayed in LCD screen, replace

Check the contact of CN-DISP connector.

When the detect switch(double key) inside the remote

controller door is fault, it is impossible to operate

Check DISP PWB Ass'y

- Voltage between CN DISP

: DC 5V

temperature regulating(

) and wind speed selecting.

Check the connecting circuit between the remote controller

MICOM (No. ) - R17(2Ω) - IR LED - Q1 - R16(2.2KΩ).

Check point

• Check the connecting circuit between PIN 43 -

R11L(1K) - C11L(680PF) - MICOM PIN

• Check Receiver Ass'y

Service Manual 53

Troubleshooting Guide

Compressor/Outdoor Fan are unable to drive.(9k Model)

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 2°F at least.

When in Fan 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), R04H(6.2K), Micom (No.27)

(Indoor unit).

• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 77°F).

When the temperature around Outdoor PWB Ass'y is above 163°F the

compressor is stop and only Outdoor Fan is operating.

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC110V) is applied to the connecting wire termi-

nal support transferred to compressor, PWB Ass'y is normal.

• Check the circuit related to the relay(Outdoor unit).

Check point

Between Micom(No.

5) and GND

COMP ON

COMP OFF

DC5V

DC0V

Between IC01M, IC02M(No. 9)

and IC01M, IC02M(No. 8)

Below DC 1V

(app)

About DC12V

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.

• Check the abnormal condition for the component of Compressor/Outdoor

Fan Motor.

54 Room Air Conditioner

Troubleshooting Guide

Compressor/Outdoor Fan are unable to drive.(18k Model)

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 2°F at least.

When in Fan 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), R04H(6.2K), Micom (No.27)

(Indoor unit).

• Check the indoor temperature sensor is disconnected or not(About 10kΩ / at 77°F).

When the temperature around Outdoor PWB Ass'y is above 163°F the

compressor is stop and only Outdoor Fan is operating.

Check Relay(RY - COMP) for driving compressor.

• When the power(About AC200V) is applied to the connecting wire termi-

nal support transferred to compressor, PWB Ass'y is normal.

• Check the circuit related to the relay(Outdoor unit).

Check point

Between Micom(No.

5, 6) and GND

COMP ON

COMP OFF

DC5V

DC0V

Between IC01M, IC02M(No. 9)

and IC01M, IC02M(No. 8)

Below DC 1V

(app)

About DC12V

Turn off Main Power

• Check the electrical wiring diagram of outdoor side.

• Check the abnormal condition for the component of Compressor/Outdoor

Fan Motor.

Service Manual 55

Troubleshooting Guide

When indoor Fan does not operate.

Does the voltage of each terminals of CN-MOTOR CONNECTOR in

Indoor unit corresponds to values in the Table of page 56

Does the voltage of terminal of CN-DC/DC CONNECTOR in

Check connecting condition of the CN-MOTOR CON-

Indoor unit corresponds to the values in the table of page 56

NECTOR

Do the voltage of terminal of

Check the pattern and the

CN-DC/DC CONNECTOR in

condition of Indoor unit PWB

Outdoor unit corresponds to the

Ass'y.

Check the interference of Indoor Fan.

values in the table of page 56

Check the connecting condi-

Check the patterns and the

tion and disconnection of

Check the motor of Indoor Fan

conditions of outdoor unit

connecting wires between

PWB Assy's.

Indoor and Outdoor unit.

Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode).

Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F.

(At that times, Defrost indicator is turned on)

56 Room Air Conditioner

Troubleshooting Guide

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-UP/DOWN Connector

• Check the soldering condition(on PWB) of CN-UP/DOWN Connector

Check the operating circuit of the Vertical Louver

• Confirm that there is DC 12V between pin (RED) of CN-UP/DOWN and

GND.

• Confirm that there is a soldering short at following terminals.

- Between ⁶⁰, ⁶¹, 62 and ⁶³of MICOM

- Between ², 3 , 4 and 5 of IC01M

- Between ¹², 13 , 14 , 15 of IC01M

- Between ¹, 2 , 3 , 4 and 5 of CN-UP/DOWN

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 57

Troubleshooting Guide

When a comunication error occurs.

• The operation indicator of Indoor unit blinks five times.

• The red indicator of Outdoor unit blinks five times.

Check the connecting wires between Indoor and Outdoor unit for the

connecting error and the contacting condition.

Check the installation condition of outdoor unit.

Check for the communication error and the operating condition of product

after also operating with the remote controller, then taking above 2 minutes.

Apply the power again after about 20 seconds by the power of Outdoor unit

is off.

Check for the communication error and the operating condition of product

after also operating with the remote controller, then taking above 2 minutes.

Check the PWB assembly of Indoor and Outdoor unit.

If the connecting wires of Indoor and Outdoor unit are not connected within 2 minutes after the power of

Outdoor unit is applied, a communication error will occur. Therefore, the power should be applied after connect-

ing them.

58 Room Air Conditioner

Troubleshooting Guide

The phenomena in case of connecting error

INDOOR UNIT

Connector Type

CN-DC/DC

Phenomena

Condition

Open and connecting error

• The same as the phenomenon of Outdoor Unit.

Blue

Black

Brown

Red

• The indoor fan does not operate.

• The operation indicator of Indoor unit blinks 8 times.

CN-MOTOR

Open

Short between terminals

Open

• The up/down vane does not operate.

CN-UP/DOWN

CN-DISP

• The up/down vane does not smoothly operate.

• It does not operate with a remote controller.

• The operation indicator blinks once.

On for 0.5 second

Open

Off for 3 seconds

• The compressor and the outdoor fan stop.

• The indoor fan speed is low.

CN-TH

• The operation indicator blinks once

(on for 0.5 second, off for 3 seconds).

• The compressor operates continuously regardless

of the setting temperature and the variation of room

temperature.

Short between terminals

(

and ) of ROOM-TH.

• The operation indicator blinks once

(on for 0.5 second, off for 3 seconds)

• Continuous operation

Short between terminals

(

and ) of PIPE-TH.

Service Manual 59

Troubleshooting Guide

OUTDOOR UNIT

Connector Type

Phenomena

Condition

• All functions stop.

• The operation with the remote controller, forced and

test one do not operate.

OPEN

CN-POWER

Connecting reversely

• PWB pattern is damaged when applying the power.

• All functions stop or the compressor does not operate.

• The operation with the remote controller, forced and test

one do not operate.

OPEN

RY-COMP

terminal

• All functions stop.

• The operation with the remote controller, forced and test

one do not operate.

Connecting reversely

• All functions stop.

• The operation with the remote controller, forced and

test one do not operate.

OPEN

CN-TRANS

CN-FAN

• The Indoor Fan does not operate.

• All functions stop.

• The operation with the remote controller, forced and test

one do not operate.

The connecting

wire of CN-

DC/DC, and

Indoor and

• The only signal of remote controller operation/stop is

inputted, but the product does not operate.

• The RED indicator of outdoor unit blinks 5 times after 2

minutes with applying the power.

Connecting error

Outdoor Unit

(

)

• The beep sound, such as "beep, beep, beep, beep,

beep", occurs periodically in Indoor unit.

• The signal input of a remote controller and operation of

product is impossible.

• The RED indicator blinks 5 times after 2 minutes with

applying the power.

Blue

Connecting error

Black

Brown

Red

(

)

• The signal of remote controller is inputted, but the

product does not operate.

• The RED indicator of outdoor unit and the operation

indicator of indoor one blinks 5 times after 2 minutes

with applying the power.

Connecting error

(

)

• No power for Indoor unit.

• The signal input of the remote controller and opera-

tion of product is impossible.

• The thermal protector of the Power Trans operates

when let it alone for long time.

Connecting error

(

)

• The signal of the remote controller is inputted.

• The fuse and Q61 in the Outdoor unit are damaged

when the indoor fan is operated.

Connecting error

(

)

• No power for Indoor unit.

• The signal input of the remote controller and opera-

tion of product is impossible.

• The RED indicator of the Outdoor unit blinks 5 times

after 2 minutes with applying the power.

Connecting error

(

)

60 Room Air Conditioner

Schematic Diagram

Electric Control Device

■ Indoor

Service Manual 61

Schematic Diagram

■ Outdoor (9k, 12k)

62 Room Air Conditioner

Schematic Diagram

■ Outdoor (18k, 24k)

Service Manual 63

Schematic Diagram

Wiring Diagram

■■Indoor Unit

Models: 9k, 12k, 18k, 24k

64 Room Air Conditioner

Schematic Diagram

■■Outdoor Unit

Models: 9k(C/O)

Models: 12k(H/P), 12k(C/O, H/P)

Service Manual 65

Schematic Diagram

Models: 18k(C/O)

Models: 18k(H/P), 24k(C/O, H/P)

66 Room Air Conditioner

Schematic Diagram

Components Location

■■Indoor

MAIN P.W.B ASSEMBLY

• TOP VIEW

• BOTTOM VIEW

Service Manual 67

Schematic Diagram

■ Outdoor(9k, 12k)

• TOP VIEW

• BOTTOM VIEW

68 Room Air Conditioner

Schematic Diagram

■ Outdoor(18k, 24k)

• TOP VIEW

• BOTTOM VIEW

Service Manual 69

Schematic Diagram

DISPLAY ASSEMBLY

– 6870A90240D

– 6870A90240E

70 Room Air Conditioner

Product Specifications

Cooling Only

Model Name

DMC09SB-0

DMC12SB-0

DMC18SB-1

DMC24SB-1

Item

Unit

Power Supply

Cooling Capacity

Input

Running Current

COMP. Locked Rotor AMP.

S.E.E.R

Air Circulation

Moisture Removal

Noise Level

Ø, V, Hz

BTU/h

1, 115V, 60

9,000

1, 115V, 60

11,500

1,150

10.5

9.3(330)

1.4(3.0)

1, 230/208, 60

18,000/17,800

1,940

8.6/9.5

25*2

13.0(460)

2.5(5.3)

1, 230/208 , 60

22,100/22,500

2,250

12.5/11.5

29+33

780

7.1(250)

1.2(2.6)

m³G/min(cfm)

l/h(pts/hr)

dB(A)

15(530)

3.1(6.6)

Indoor, High

(Sound Pressure, 1m) Med

Low

dB(A)

Outdoor, Max

dB(A)

Features

Temperature Control

Air Deflection

Thermistor

4-way

themistor

4-way

Thermistor

4-way

themistor

4-way

Steps, Fan/Cool

3/3

3/3/3

3/3

3/3/3

Air Deflection Control(up&down)

Air Deflection Control(left&right)

Remocon Type

Setting Temperature Range, Cooling Mode

Temperature Increment

Auto Operation(electronic control)

Self Diagnosis

Auto

Wireless LCD

64~86°F

2°F(1°C)

Yes

auto

Wireless LCD

64~86°F

2°F(1°C)

Yes

Auto

Wireless LCD

64~86°F

2°F(1°C)

Yes

auto

Wireless LCD

64~86°F

2°F(1°C)

Yes

Timer

Sleep Operation

24hr , On/Off

Yes

24hr , on/off

Yes

24hr , On/Off

Yes

24hr , on/off

Yes

Healthy Dehumidification Mode

Yes

Restart Delay

minutes

g(oz)

AWG#:P*mm²

Refrigerant(R-410a) Charge

Power cord

600(21.1)

14:3*2.5

930(32.8)

14:3*2.5

850(30.0)

14:3*2.5

1750(61.7)

12:3Åñ2.5

Fuse of breaker Capacity

Connecting Cable

Connecting Tube

(Ø, Socket Flare)

AWG#:P*mm²

mm(in)

m(ft)

18:4*0.75

6.35(1/4)

9.52(3/8)

7.5(25)

15.5(5/8)

840*270*153

33-1/16*10-5/8*6-1/32

770*541*244

30-5/16*21-5/16*9-5/18

7.0(15.4)

30(66.1)

18:4*0.75

6.35(1/4)

12.7(1/2)

7.5(25)

15.5(5/8)

895*282*165

35.2*11.1*6.5

770*541*244

30-5/16*21-5/16*9-5/8

9.3(20.5)

33(72.8)

18:4*0.75

6.35(1/4)

12.7(1/2)

7.5(25)

15.5(5/8)

1090*300*178

18:4*0.75

6.35(1/4)

15.88(5/8)

7.5(25)

15.5(5/8)

1090*300*178

Liquid Side

Gas Side

Length, std

Additional Drain Hose(outer Dia.)

Dimensions

(WxHxD)

mm(in)

Indoor

42-15/16*11-13/16*7-1/32 42-15/16*11-13/16*7-1/32

Outdoor

871*655*320

34-5/16*25-13/16*12-5/8

13.0(28.6)

871*800*320

34-5/16*31-1/2*12-5/8

13(28.6)

Net Weight

Indoor

Outdoor

Kg(lbs)

68.1(149.9)

77(169.6)

* Design and specifications subject to change without prior notice for product improvement.

Service Manual 71

Product Specifications

Cooling & Heating

Items

Power Supply

Cooling Capacity

Heating Capacity

Unit

ø, V, Hz

BTU/h

DMH09SB-0

1, 115V, 60

9,800

DMH12SB-0

1, 115V, 60

11,500

1,150

DMH18SB-1

1, 230/208 , 60

19,000/19,500

2,250

DMH24SB-1

1, 230/208 , 60

22,100/22,500

2,250

9,800

980

9.5

Input

Cooling

Heating

Cooling

Heating

Cooling

Heating

1,150

10.5

2,700

12.5/11.5

29+33

12.5/11.5

29+33

Running Current

COMP. Locked

Rotor AMP.

S.E.E.R

7.8

H.S.P.E

Air Circulation

Moisture Removal

Noise Level

(Sound

m³/min(cfm)

l/h(pts/hr)

dB(A)

9.3(330)

1.4(3.0)

9.3(330)

1.4(3.0)

15(530)

3.1(6.6)

15(530)

3.1(6.6)

Indoor, High

Med

dB(A)

Pressure, 1m)

Low

dB(A)

themistor

4-way

themistor

4-way

themistor

4-way

themistor

4-way

Outdoor, Max

Temperature Control

Air Deflection

Steps, Fan/Cool/Heat

dB(A)

Features

3/3/3

auto

Airflow Direction Control(up&down)

Airflow Direction Control(left&right)

Remocon Type

Setting Temperature Range, Cooling Mode

Heating Mode

Temperature Increment

Auto Operation(electronic control)

Self Diagnosis

Wireless LCD

64~86°F

60~86°F

2°F(1°C)

Yes

Wireless LCD

64~86°F

60~86°F

2°F(1°C)

Yes

Wireless LCD

64~86°F

60~86°F

2°F(1°C)

Yes

Wireless LCD

64~86°F

60~86°F

2°F(1°C)

Yes

24hr , on/off

Yes

24hr , on/off

Yes

24hr , on/off

Yes

24hr , on/off

Yes

Timer

Sleep Operation

Yes

Healthy Dehumidification Mode

Yes

Restart Delay

Defrost Control

Hot Start

minutes

930(32.8)

14:3*2.5

930(32.8)

14:3*2.5

1750(61.7)

12:3*2.5

1750(61.7)

12:3*2.5

Refrigerant(R410A) Charge

Power cord

Fuse or breaker Capacity

Connecting Cable

g(oz)

AWG #: P*mm²

mm(in)

m(ft)

18:4*0.75

6.35(1/4)

12.7(1/2)

7.62(25)

15.5(5/8)

895*282*165

35.2*11.1*6.5

770*541*244

30-5/16*21-5/16*9-5/8

9.3(20.5)

33(72.8)

18:4*0.75

6.35(1/4)

12.7(1/2)

7.62(25)

15.5(5/8)

895*282*165

35.2*11.1*6.5

770*541*244

30-5/16*21-5/16*9-5/8

9.3(20.5)

33(72.8)

18:4*0.75

6.35(1/4)

15.88(5/8)

7.62(25)

15.5(5/8)

1090*300*178

42-15/16*11-13/16*7-1/32

871*800*320

34-5/16*31-1/2*12-5/8

13(28.6)

77(169.6)

18:4*0.75

6.35(1/4)

15.88(5/8)

7.62(25)

15.5(5/8)

1090*300*178

42-15/16*11-13/16*7-1/32

871*800*320

34-5/16*31-1/2*12-5/8

13(28.6)

77(169.6)

Connecting Tube

(ø. Socket Flare)

Liquid Side

Gas Side

Length, std

Additional Drain Hose(Outer Dia.)

mm(in)

Dimensions

(WxHxD)

Outdoor

Indoor

770*540*245

kg(lbs)

33(72.8)

Net Weight

Outdoor

Indoor

kg(lbs)

* Design and Specifications subject to change without prior notice for product improvement.

72 Room Air Conditioner

Specifications and performance data subject to change without notice.

HEAT CONTROLLER, INC.

1900 WELLWORTH AVENUE • JACKSON, MICHIGAN 49203

THE QUALITY LEADER IN CONDITIONING AIR

P/No.:3828A20390T

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