Quasar Hq-2081th Service Manual

Service Manual

Room Air Conditioner

HQ-2243TH,LWC081

WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to
service or repair the product or products deal with in this service information by anyone else could result in serious injury or death.

© 2003 Matsushita Electric Industrial co., Ltd.
All rights reserved. Unauthorized copying and
distribution is violation of law.

ORDER NO. RAC0212002C1
E9

—2—

1. PREFACE

1.1 SAFETY PRECAUTIONS ...............................2

1.2 INSULATION RESISTANCE TEST.................2

1.3 FEATURES.....................................................3

1.4 SPECIFICATIONS ..........................................3

1.5 CONTROL LOCATIONS.................................4

2.

DISASSEMBLY INSTRUCTIONS

2.1 MECHANICAL PARTS....................................6

2.1.1 FRONT GRILLE.....................................6

2.1.2 CABINET................................................6

2.1.3 CONTROL BOX.....................................6

2.2 AIR HANDLING PARTS..................................7

2.2.1 COVER (AT THE TOP)..........................7

2.2.2 BLOWER................................................7

2.2.3 FAN........................................................8

2.2.4 SHROUD................................................8

2.3 ELECTRICAL PARTS.....................................8

2.3.1 MOTOR..................................................8

2.3.2 COMPRESSOR.....................................8

2.3.3 CAPACITOR..........................................9

2.3.4 POWER CORD......................................9

2.3.5 THERMOSTAT ......................................9

2.3.6 ROTARY SWITCH...............................10

2.3.7 SYNCHRONOUS MOTOR ..................10

2.4 REFRIGERATION CYCLE............................11

2.4.1 CONDENSER......................................11

2.4.2 EVAPORATOR....................................11

2.4.3 CAPILLARY TUBE...............................11

3.

INSTALLATION

3.1 HOW TO INSTALL THE UNIT ......................14

3.2 WINDOW REQUIREMENTS.........................14

3.3 INSTALLATION KITS CONTENTS...............14

3.4 SUGGESTED TOOL REQUIREMENTS.......16

3.5 CABINET INSTALLATION............................17

4.

TROUBLESHOOTING GUIDE

4.1 OUTSIDE DIMENSIONS...............................19

4.2 PIPING SYSTEM ..........................................19

4.3 TROUBLESHOOTING GUIDE......................20

5. SCHEMATIC DIAGRAM

5.1 CIRCUIT DIAGRAM......................................25

6. EXPLODED VIEW..................................26

7. REPLACEMENT PARTS LIST.......27

1. PREFACE

This

SERVICE MANUAL provides various service information, including the mechanical and electrical

parts etc. This room air conditioner was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.

1.1 SAFETY PRECAUTIONS

1. When servicing the unit, set the ROTARY SWITCH
or POWER SWITCH to OFF and unplug the power
cord.

2. Observe the original lead dress.
If a short circuit is found, replace all parts which
have been overheated or damaged by the short
circuit.

3. After servicing the unit, make an insulation
resistance test to protect the customer from being
exposed to shock hazards.

1.2

INSULATION RESISTANCE TEST

1. Unplug the power cord and connect a jumper
between 2 pins (black and white).

2. The grounding conductor (green or green & yellow)
is to be open.

3. Measure the resistance value with an ohm meter
between the jumpered lead and each exposed
metallic part on the equipment at all the positions
(except OFF or O) of the ROTARY SWITCH.

4. The value should be over 1MΩ.

CONTENTS

—3—

1.3 FEATURES

• DESIGNED FOR COOLING ONLY

• POWERFUL AND INCREDIBLE COOLING

• BUILT-IN ADJUSTABLE THERMOSTAT

• WASHABLE ONE-TOUCH FILTER

• COMPACT SIZE

1.4 SPECIFICATIONS

HQ-2243TH

POWER SUPPLY Ø, V, Hz
COOLING CAPACITY Btu/h.
POWER INPUT W
RUNNING CURRENT A
EER Btu/h.W
OPERATING

INDOOR °F(°C)

CONDITION

OUTDOOR

°F(°C)
REFREIGERANT (R-22) CHARGE
EVAPORATOR
CONDENSER

FAN

INDOOR

OUTDOOR

FAN SPEED

FAN/COOLING
FAN MOTOR
OPERATION CONTROL
ROOM TEMP. CONTROL
AIR DIRECTION VERTICAL
CONTROL

HORIZONTAL

CONSTRUCTION
PROTECTOR

COMPRESSOR
FAN MOTOR

POWER CORD
DRAIN SYSTEM

NET WEIGHT lbs(kg)
DIMENSION(W*H*D) inch(mm)

1, 230/208, 60

2,350/2,300
2,500/2,450

11.2/12.0

9.4

DB : 80(26.7) WB : 67(19.4)

DB : 95(35) WB : 75(23.9)

980g (34.6 oz)

3 ROW 15 STACKS, SLIT-FIN TYPE

2 ROW 19 STACKS, LOUVERED-FIN TYPE

TURBO FAN

PROPELLER TYPE FAN WITH SLINGER-RING

2/3

6 POLES

ROTARY SWITCH

THERMOSTAT

MANUAL

AUTO

SLIDE IN-OUT CHASSIS

OVERLOAD PROTECTOR

INTERNAL TERMINAL PROTECTOR

3WIRE WITH GROUNDING

ATTACHMENT PLUG(CORD-CONNECTED TYPE)

DRAIN PIPE OR SPLASHED BY FAN SLINGER

146(66)

26 * 1627/32 * 3023/32 (660 * 428 * 770)

MODELS

ITEMS

* DB:Dry Bulb
**

WB:Wet Bulb

❈ The specifications will be changed without notice for further improvement.

1.5 CONTROL LOCATIONS

—4—

• OPERATION

Off - Turns air conditioner off.
Med Fan - Med speed fan operation without cooling.
Low Fan - Low speed fan operation without cooling.
High Cool - Cooling with high speed fan operation.
Med Cool - Cooling with med speed fan operation.

Low Cool - Cooling with low speed fan operation.

• THERMOSTAT

This automatically controls the temperature of the indoor air.
Turn the knob so that arrow points to the higher number for
greater cooling. Point the arrow to the lower number for more
moderate cooling.
(i.e. the higher the number, the greater the cooling)

• FOR NORMAL COOLING

1. Turn the operation switch to the High Cool or the Low
Cool setting.

2. Set the Thermostat control to the desired temperature
mark 5 (the mid-point is a good starting position).
If the room temperature is not satisfactory after a
reasonable time, adjust the control to a cooler or warmer
setting, as appropriate.

• FOR MAXIMUM COOLING

1. Turn the Operation Knob to the High Cool setting.

2. Set the Thermostat control to the highest (9) temperature
mark.

• FOR QUIETER OPERATION

1. Turn the Operation Knob to the Low Cool setting.

2. Set the Thermostat control as needed.

• AIR SWING

ON - Air swing is operated while OPERATION Knob is

set to the COOL position.

OFF - Stop the operation of air swing.

When the air conditioner has performed its cooling operation and is turned off or set to the fan position, wait at least 3
minutes before resetting to the cooling operation again.

CAUTION

VENTCLOSE

OPEN

Part

A

Part

B

Drain pipe

Drain cap

—5—

• VENTILATION

The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions.
When fresh air is necessary in the room, set the ventilation lever to the OPEN position.
The damper is opened and room air is drawn out.

NOTE: Before using the ventilation feature, and prior to installing the front grille, pull down part until level with part .

• AIR DIRECTION

The direction of air can be controlled wherever you want to cool by adjusting the horizontal louver and the vertical louver.

The vertical air direction is adjusted by rotating the horizontal louver
forward or backward manually.

The horizontal air direction is adjusted by rotating the
vertical louver right or left manually.

• VERTICAL AIR-DIRECTION CONTROL

•

HORIZONTAL AIR-DIRECTION CONTROL

• HOW TO SECURE THE DRAIN PIPE

In humid weather, excess water may cause the BASE PAN to overflow. To drain
the water, remove the DRAIN CAP and secure the DRAIN PIPE to the rear hole
of the BASE PAN. Press the drain pipe into the hole by pushing down and away
from the fins to avoid injury.

—6—

2.1 MECHANICAL PARTS

2.1.1 FRONT GRILLE

1. Open the inlet grille upward or downward.

2. Remove the screw which fastens the front grille.

3. Pull the front grille from the right side.

4. Remove the front grille. (See Fig. 1)

5. Re-install the component by referring to the
removal procedure.

2.1.2 CABINET

1. After disassembling the FRONT GRILLE, remove
the screws which fasten the cabinet at both sides.
Keep these for later use.

2. Remove the two screws which fasten the cabinet
at back. (See Fig. 2)

3. Pull the base pan forward.

2.1.3 CONTROL BOX

1. Remove the front grille. (Refer to section 2.1.1)

2. Pull the base pan forward so that you can remove
the 2 screws which fasten the cover control at the
right side. (See Fig. 3)

3. Remove the 3 screws which fasten the control
box. (See Fig. 3)

4. Discharge the capacitor by placing a 20,000 ohm
resistor across the capacitor terminals.

5. Disconnect two wire housings in the control box.

6. Pull the control box forward completely.

7. Re-install the components by referring to the
removal procedure. (See Fig. 3)
(Refer to the circuit diagram found on page 28~31
in this manual and on the control box.)

2. DISASSEMBLY INSTRUCTIONS

— Before the following disassembly, POWER SWITCH is set to OFF and disconnected the power cord.

Figure 1

Figure 2

Figure 3

—7—

2.2 AIR HANDLING PARTS

2.2.1 COVER (AT THE TOP)

1. Remove the front grille. (Refer to section 2.1.1)

2. Remove the cabinet. (Refer to section 2.1.2)

3. Remove 11 screws which fasten the brace and
covers.

4. Remove the covers and the brace. (See Fig. 4)

5. Re-install the components by referring to the
removal procedure, above.

2.2.2 BLOWER

1. Remove the cover. (Refer to section 2.2.1)

2. Remove the 3 screws which fasten the
evaporator at the left side and the top side.
(See Fig. 4)

3. Move the evaporator sideward carefully.

4. Remove the orifice from the air guide carefully.

5. Remove the clamp which secures the blower with
plier. (See Fig. 5)

6. Remove the blower with plier or your hand
without touching blades. (See Fig. 6)

7. Re-install the components by referring to the
removal procedure, above.

Figure 4

Figure 5

Figure 6

—8—

2.2.3 FAN

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the brace and shroud cover.
(Refer to section 2.2.1)

3. Remove the side cover with 2 screws.
(See Fig. 7)

4. Remove the 5 or 6 screws which fasten the
condenser.

5. Move the condenser sideways carefully.

6. Remove the clamp which secures the fan.

7. Remove the fan. (See Fig. 7)

8. Re-install the components by referring to the
removal procedure, above.

2.2.4 SHROUD

1. Remove the fan. (Refer to section 2.2.3)

2. Remove the 2 screws which fasten the shroud.

3. Remove the shroud. (See Fig. 8)

4. Re-install the component by referring to the
removal procedure, above.

2.3 ELECTRICAL PARTS

2.3.1 MOTOR

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the cover control and disconnect a wire
housing in control box. (Refer to section 2.1.3)

3. Remove the blower. (Refer to section 2.2.2)

4. Remove the fan. (Refer to section 2.2.3)

5. Remove the 4 screws which fasten the motor.
(See Fig. 9)

6. Remove the motor.

7. Re-install the components by referring to the
removal procedure, above.

2.3.2 COMPRESSOR

1. Remove the cabinet. (Refer to section 2.1.2)

2. Discharge the refrigerant system using Freon

TM

Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the Freon

TM

. Leave the valve in place after

servicing the system.

3. Disconnect the 3 leads from the compressor.

4. After purging the unit completely, unbraze the
suction and discharge tubes at the compressor
connections.

5. Remove the 3 nuts and the 3 washers which
fasten the compressor. (See Fig. 10)

6. Remove the compressor.

7. Re-instill the components by referring to the
removal procedure, above.

Figure 7

Figure 8

Figure 9

Figure 10

—9—

2.3.3 CAPACITOR

1. Remove the control box. (Refer to section 2.1.3)

2. Remove the screw and knobs which fasten the
display panel.

3. Disconnect the 2 leads from the rocker switch and
remove the panel.

4. Remove a screw and unfold the control box.
(See Fig. 11)

5. Remove the screw and the clamp which fastens
the capacitor. (See Fig. 11)

6. Disconnect all the leads of capacitor terminals.

7. Re-install the components by referring to the
removal procedure, above.

2.3.4 POWER CORD

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Disconnect the grounding screw from the control
box.

4. Disconnect 2 receptacles.

5. Remove a screw which fastens the clip cord.

6. Pull the power cord. (See Fig. 12)

7. Re-install the component by referring to the
removal procedure, above.
(Use only one ground-marked hole for ground
connection.)

8. If the supply cord of this appliance is damaged, it
must be replaced by the special cord.
(The special cord means the cord which has the
same specification marked on the supply cord
fitted to the unit.)

2.3.5 THERMOSTAT

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Remove the 2 screws which fasten the thermostat.

4. Disconnect all the leads of thermostat terminals.

5. Remove the thermostat. (See Fig. 13)

6. Re-install the components by referring to the
removal procedure, above.

Figure 12

Figure 11

Figure 13

2.3.6 ROTARY SWITCH

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Remove 2 screws which fasten the rotary switch.

4. Disconnect all the leads of the rotary switch
terminals.

5. Remove the rotary switch. (See Fig. 14)

6. Re-install the components by referring to the
above removal procedure, above.

2.3.7 SYNCHRONOUS MOTOR

1. Remove the control box. (Refer to section 2.1.3)

2. Unfold the control box. (Refer to section 2.3.3)

3. Remove the crankshaft.

4. Disconnect all the leads of the synchronous
motor.

5. Remove the 2 screws which fasten the
synchronous motor. (See Fig. 15)

6. Re-install the components by referring to the
removal procedure, above.

—10—

Figure 15

Figure 14

—11—

2.4 REFRIGERATION CYCLE

2.4.1 CONDENSER

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the brace and the shroud cover.
(Refer to section 2.2.1)

3. Remove 2 screws which fasten the side
cover.(See Fig. 16)

4. Remove the 5 or 6 screws which fasten the
condenser.

5. After discharging the refrigerant completely,
unbraze the interconnecting tube at the condenser
connections.

6. Remove the condenser.

7. Re-install the components by referring to notes.
(See Fig. 16)

2.4.2 EVAPORATOR

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the top cover and the brace.
(Refer to section 2.2.1)

3. Discharge the refrigerant completely.

4. Remove the 3 screws which fasten the evaporator
at the left side and the top side.

5. Move the evaporator sideward carefully and then
unbraze the interconnecting tube at the evaporator
connectors.

6. Remove the evaporator.

7. Re-install the components by referring to notes.
(See Fig. 17)

2.4.3 CAPILLARY TUBE

1. Remove the cabinet. (Refer to section 2.1.2)

2. Remove the brace. (Refer to section 2.2.1)

3. After discharging the refrigerant completely,
unbraze the interconnecting tube at the capillary
tube.

4. Remove the capillary tube.

5. Re-install the components by referring to notes.

Figure 16

Figure 17

Discharge the refrigerant system using Freon

TM

Recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before
venting the Freon

TM

. Leave the valve in place

after servicing the system.

CAUTION

—12—

— Replacement of the refrigeration cycle.

1. When replacing the refrigeration cycle, be sure to
discharge the refrigerant system using a Freon

TM

recovery System.
If there is no valve to attach the recovery system,
install one (such as a WATCO A-1) before venting
the FreonTM. Leave the valve in place after
servicing the system.

2. After discharging the unit completely, remove the
desired component, and unbrace the pinch-off
tubes.

3. Solder service valves into the pinch-off tube ports,
leaving the valves open.

4. Solder the pinch-off tubes with Service valves.

5. Evacuate as follows.

1) Connect the vacuum pump, as illustrated

Fig. 18.

2) Start the vacuum pump, slowly open manifold

valves A and B with two full turns
counterclockwise and leave the valves closed.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold

and entire system.

3) Operate the vacuum pump for 20 to 30 minutes,

until 600 microns of vacuum is obtained. Close
valves A and B, and observe vacuum gauge for
a few minutes. A rise in pressure would
indicate a possible leak or moisture remaining in
the system. With valves A and B closed, stop

the vacuum pump.

4) Remove the hose from the vacuum pump and

place it on the charging cylinder. See Fig. 19.
Open valve C.
Discharge the line at the manifold connection.

5) The system is now ready for final charging.

6. Recharge as follows :

1) Refrigeration cycle systems are charged from the
High-side. If the total charge cannot be put
in the High-side, the balance will be put in the
suction line through the access valve which you
installed as the system was opened.

2)

Connect the charging cylinder as shown in Fig. 19.
With valve C open, discharge the hose at the
manifold connection.

3) Open valve A and allow the proper charge to
enter the system. Valve B is still closed.

4) If more charge is required, the high-side will not
take it. Close valve A.

5) With the unit running, open valve B and add the
balance of the charge.

a. Do not add the liquid refrigerant to the Low-

side.

b. Watch the Low-side gauge; allow pressure to

rise to 30 lbs.
c. Turn off valve B and allow pressure to drop.
d. Repeat steps B and C until the balance of the

charge is in the system.

6) When satisfied the unit is operating correctly,
use the pinch-off tool with the unit still running
and clamp on to the pinch-off tube. Using a tube
cutter, cut the pinch-off tube about 2 inches from
the pinch-off tool. Use sil-fos solder and solder
pinch-off tube closed. Turn off the unit, allow it to
set for a while, and then test the leakage of the
pinch-off connection.

NOTES

If high vacuum equipment is used, just crack
valves A and B for a few minutes, then open
slowly with the two full turns counterclockwise.
This will keep oil from foaming and being
drawn into the vacuum pump.

CAUTION

—13—

Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pinch-off tool
capable of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service
valve.

A

COMPOUND GAUGE

EVAPORATOR

(LOW PRESSURE SIDE)

COMPRESSOR

CAPILLARY TUBE

CONDENSER
(HIGH PRESSURE SIDE)

SEE INSETS

BELOW

MANIFOLD

GAUGE

B

Figure 18 - Pulling Vacuum

Figure 19 - Charging

A

B

EXTERNAL
VACUUM PUMP

LOW

B

HI

A

CHARGING
CYLINDER

C

—14—

3. INSTALLATION

3.1 HOW TO INSTALL THE UNIT

1. To avoid vibration and noise, make sure the unit is installed
securely and firmly.

2. Install the unit where the sunlight does not shine directly on
the unit.
If the unit receives direct sunlight, build an awning to shade
the cabinet.

3. There should be no obstacle, like a fence, within 20" which
might restrict heat radiation from the condenser.

4. To prevent reducing performance, install the unit so that
louvers of the cabinet are not blocked.

5. Install the unit a little obliquely outward not to leak the
condensed water into the room (about 1/2" or 1/4 bubble
with level).

6. Install the unit with its bottom portion 30~60" above the floor
level.

7. Stuff the foam between the top of the unit and the wall to
prevent air and insects from getting into the room.

8. The power cord must be connected to an independent
circuit. The green wire must be grounded.

9. Connect the drain tube to the base pan hole in the rear side
if you need to drain (consult a dealer).
Plastic hose or equivalent may be connected to the drain
tube.

About 1/2"

Over 20"

HEAT

RADIATION

FENCE

AWNING

FOAM

COOLED

AIR

30-60"

Level

1/4 Bubble

3.2 WINDOW REQUIREMENTS

NOTE: All supporting parts should be secured to firm wood,
masonry, or metal.

3.2.1 WINDOW REQUIREMENTS

1. This unit is designed for installation in standard
double hung windows with actual opening widths from
29" to 41".
The top and bottom window sashes must open
sufficiently to allow a clear vertical opening of 18"
from the bottom of the upper sash to the window
stool.

2. The stool offset (height between the stool and sill)
must be less than 1 1/4".

29" to 41"

18" min

Offset
Less

than 1

1

/4"

Sill

Exterior

Interior wall

26" min.

(Without frame curtain)

Stool

—15—

Foam-PE
(Adhesive-Backed)

Foam-PE
(Adhesive-Backed)

Type C (5) Type D (2)

Type A (14)

Carriage Bolt (2) Lock Nut (4)

Type B (7)

Foam strip
(Plain-Back)

Right frame
curtain

Drain pipe

Window locking
bracket

Left frame
curtain

Frame guide(2)

Sill

bracket

(2)

Support bracket(2)

3.3 INSTALLATION KITS CONTENTS

—16—

3.4.1 PREPARATION OF CHASSIS

1. Remove the screws which fasten the cabinet at both sides

and at the back. Keep these two screws which fasten the
cabinet at both sides for later use.

2. Slide the unit out from the cabinet by gripping the base pan

handle and pulling forward while bracing the cabinet.

3. Cut the window sash seal to the proper length. Peel off the

backing and attach the FOAM-PE to the underside of the
window sash.

4. Remove the backing from FOAM-PE with 3 holes and

attach it to the bottom of the Top retainer bar.

5. Attach the Top retainer bar onto the top of the cabinet with 3

screws (Type A).

6. Insert the Frame guides into the bottom of the cabinet.

7. Insert the Frame Curtain into the Top retainer bar and

Frame guides.

8. Fasten the curtains to the unit with 10 screws (Type A) at

both sides.

SCREWDRIVER(+, -), RULER, KNIFE, HAMMER, PENCIL, LEVEL

Figure 20

Figure 21

Figure 22

Figure 23

3.4 SUGGESTED TOOL REQUIREMENTS

Shipping screws

FOAM-PE

Top retainer bar

Screw

(Type A)

Top retainer bar

FOAM-PE

Screw(Type A)

Frame guide

—17—

3.5 CABINET INSTALLATION

1. Open the window. Mark a line on the center of the window
stool between the side window stop moldings.
Loosely attach the sill bracket to the support bracket using
the carriage bolt and the lock nut.

2. Attach the sill bracket to the window sill using the screws
(Type B).
Carefully place the cabinet on the window stool and align the
center mark on the bottom front with the center line marked
window stool.

3. Using the M-screw and the lock nut, attach the support
bracket to the cabinet track hole. Use the first track hole
after the sill bracket on the outer edge of the window sill.
Tighten the carriage bolt and the lock nut. Be sure the
cabinet slants outward.

CAUTION: Do not drill a hole in the bottom pan. The unit is

designed to operate with approximately 1/2" of
water in bottom pan.

4. Pull the bottom window sash down behind the Top retainer
bar until they meet.

NOTE: 1. Do not pull the window sash down so tightly that the

movement of Frame curtain is restricted. Attach the
cabinet to the window stool by driving the screws
(Type B) through the cabinet into window stool.

2. The cabinet should be installed with a very slight tilt
downward toward the outside.

Support
Bracket

Lock nut

Sill
Bracket

Carriage
Bolt
(M-Screw)

Front angle

Window stool

Window sash

Top retainer bar

Cabinet

Foam-PE

Frame curtain

Screw(Type B)

Front Angle

Sash track

Foam-PE

Cabinet
Track hole

Support
Bracket

Carriage bolt
and lock nut

Machine screw (Type D)
and lock nut

Outer edge
of window
sill

Screw(Type B)

Sill bracket

Top
retainer
bar

Figure 24

Figure 25

Figure 26

Figure 27

Figure 28

—18—

5. Pull each Frame curtain fully to each window sash
track, and pull the bottom window sash down behind
the Top retainer bar until it meets.

6. Attach each Frame curtain the window sash by using
screws (Type C). (See Fig. 29)

7. Slide the unit into the cabinet. (See Fig. 30)

CAUTION: For security purpose, reinstall screws (Type

A) at cabinet's sides.

8. Cut the Foam-strip to the proper length and insert
between the upper window sash and the lower
window sash. (See Fig. 31)

9. Attach the Window locking bracket with a screw
(Type C). (See Fig. 32)

10. Attach the front grille to the cabinet by inserting the

tabs on the grille into the tabs on the front of the
cabinet. Push the grille in until it snaps into place.
(See Fig.33)

NOTE: Please refer p.5 for setting ventilation kit.

11. Lift the inlet grille and secure it with a screw (Type A)

through the front grille. (See Fig. 33)

12. Window installation of room air conditioner is now

completed.

Power Cord

Screw (Type A)

Screw

Window locking
bracket

Foam-Strip

Screw(Type C)

Figure 29

Figure 30

Figure 31

Figure 32

Figure 33

Figure 34

—19—

4. TROUBLESHOOTING GUIDE

4.1 OUTSIDE DIMENSIONS

3023/32 (770)

26(660)

16

27

/32 (428)

CAPILLARY TUBE

COMPRESSOR

BLOWER

EVAPORATOR COIL

CONDENSER COIL

FAN

MOTOR

4.2 PIPING SYSTEM

Following is a brief description of the important components and their functions in the refrigeration system.
Refer to Fig. 35 to follow the refrigeration cycle and the flow of the refrigerant in the cooling cycle.

MOTOR

COMPRESSOR

OIL

(LIQUID REFRIGERANT)

CAPILLARY TUBE

OUTSIDE COOLING
AIR FOR REFRIGERANT
PASS THROUGH

SUCTION LIME
COOL LOW PRESSURE VAPOR

COOLED
AIR

COMPLETE LIQUID
BOIL OFF POINT

LIQUID
PRESSURE
DROP

ROOM AIR HEAT LOAD

VAPOR INLET

HOT
DISCHARGED
AIR

LIQUID OUTLET

HIGH PRESSURE VAPOR
LIQUID PEFRIGERANT
LOW PRESSURE VAPOR

ROOM AIR CONDITIONER

EVAPORATOR COILS CONDENSER COILS

CYCLE OF REFRIGERATION

Figure 35

—20—

4.3 TROUBLESHOOTING GUIDE

In general, possible trouble is classified in two causes.
The one is called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air
Conditioning caused by a defect in the refrigeration circuit and improper application.

Unit runs but poor cooling

Ineffective Cooling

Check of outdoor coil
(heat exchanger) & the fan
operation.

Check gas leakage.

Repair gas leak.

Replacement of unit if the
unit is beyond repair.

Satisfactory operation with
temperature difference of
inlet & outlet air ; 44.6~50°F

Check heat load increase.

Unexpected residue

Overloaded Circuit

Check of inside gas
pressure.

Adjusting of refrigerant
charge

Malfunction of compressor

Replacement of
compressor

Check of cold air circulation
for smooth flow.

Dirty indoor coil
(Heat exchanger)

Malfunction of fan

Clogged of air filter

Obstruction at air outlet

Correct above trouble

Stop of auto air-swing

Check clogging in
refrigeration circuit.

Repair clogging in
refrigeration circuit.

—21—

Fails to Start

Check of circuit breaker
and fuse.

Gas leakage of feeler bulb
of thermostat

Check of control switch.

Only fan fails to start.

Improper wiring.

Defect of fan motor
capacitor.

Irregular motor resistance
( ).
Irregular motor insulation
( ).

Replacement of fan motor

Regular but fails to start

Replacement of compressor
(locking of rotor, metal)

Improper thermostat setting

Loose terminal connection.

Improper wiring

Irregular motor resistance ( )

Irregular motor insulation ( )

Replacement of compressor
(Motor damaged)

Drop of power voltage.

Check capacitor.

Replacement.

Only compressor fails to
start.

Defect of compressor
capacitor.

Check of power source.

Check of control switch
setting.

—22——22—

COMPLAINT CAUSE REMEDY

Check voltage at outlet. Correct if none.
Check voltage to rotary switch. If none, check

power supply cord. Replace cord if circuit is open.
Check switch continuity. Refer to wiring diagram

for terminal identification. Replace switch if
defective.

Connect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.

Test capacitor.
Replace if not within ±10% of manufacturer's
rating. Replace if shorted, open, or damaged.

Fan blade hitting shroud or blower wheel hitting
scroll. Realign assembly.

Units using slinger ring condenser fans must
have 1/4to 5/16inch clearance to the base. If it is
hitting the base, shim up the bottom of the fan
motor with mounting screw(s).

Check fan motor bearings; if motor shaft will not
rotate, replace the motor.

Check voltage. See limits on this page. If not within
limits, call an electrician.

Test capacitor.
Check bearings. Does the fan blade rotate freely?
If not, replace fan motor.

Pay attention to any change from high speed to
low speed. If the speed does not change, replace
the motor.

Check grommets; if worn or missing, replace them.
If cracked, out of balance, or partially missing,

replace it.
If cracked, out of balance, or partially missing,

replace it.
Tighten it.
If knocking sounds continue when running or

loose, replace the motor. If the motor hums or
noise appears to be internal while running,
replace motor.

No power
Power supply cord

Rotary switch

Wire disconnected or
connection loose

Capacitor (Discharge
capacitor before testing.)

Will not rotate

Revolves on overload.

Grommets
Fan

Blower

Loose set screw
Worn bearings

Fan motor will not run.

Fan motor runs
intermittently

Fan motor noise.

—23—

COMPLAINT CAUSE REMEDY

Check voltage. See the limits on the preceding.
page. If not within limits, call an electrician.

Check the wire connections, if loose, repair or
replace the terminal. If wires are off, refer to wiring
diagram for identification, and replace. Check wire
locations. If not per wiring diagram, correct.

Check for continuity, refer to the wiring diagram
for terminal identification. Replace the switch if
circuit is open.

Check the position of knob If not at the coldest
setting, advance the knob to this setting and
restart unit.
Check continuity of the thermostat. Replace
thermostat if circuit is open.

Check the capacitor.
Replace if not within ±10% of manufacturers
rating. Replace if shorted, open, or damaged.

Check the compressor for open circuit or
ground. If open or grounded, replace the
compressor.

Check the compressor overload, if externally
mounted. Replace if open. (If the compressor
temperature is high, remove the overload, cool it,
and retest.)

Check the voltage. See the limits on the preced­ing page. If not within limits, call an electrician.

Check overload, if externally mounted.
Replace if open. (If the compressor temperature
is high, remove the overload, cool, and retest.)

If not running, determine the cause. Replace if
required.

Remove the cabinet. inspect the interior surface
of the condenser; if restricted, clean carefully
with a vacuum cleaner (do not damage fins) or
brush. Clean the interior base before
reassembling.

If condenser fins are closed over a large area
on the coil surface, head pressures will increase,
causing the compressor to cycle. Straighten the
fins or replace the coil.

Voltage

Wiring

Rotary

Thermostat

Capacitor (Discharge
capacitor before
servicing.)

Compressor

Overload

Voltage

Overload

Fan motor

Condenser air flow
restriction

Condenser fins
(damaged)

Compressor will not run,
but fan motor runs.

Compressor cycles
on overload.

—24—

COMPLAINT CAUSE

REMEDY

Test capacitor.
Check the terminals. If loose, repair or replace.
Check the system for a restriction.
If restricted, clean of replace.
Close if open.
Determine if the unit is properly sized for the area to
be cooled.
Check the set screw or clamp. If loose or missing,
correct. If the blower or fan is hitting air guide,
rearrange the air handling parts.
Remove the cabinet and carefully rearrange tubing
not to contact cabinet, compressor, shroud, and
barrier.
Set the knob to HIGH COOL or LOW COOL while
rocker switch is ON.
Check terminals. If loose, repair or replace.
Check the synchronous motor for open circuit.

Capacitor
Wiring
Refrigerating system
Air filter
Exhaust damper door
Unit undersized

Blower or fan

Copper tubing

Rotary switch.

Wiring
Synchronous motor.

Compressor cycles
on overload.

Insufficient cooling or
heating

Excessive noise.

Auto air-swing fails.

—25—

5. SCHEMATIC DIAGRAM

5.1 CIRCUIT DIAGRAM

• MODEL : HQ-2243TH

1

3

4

7

2

6

5

WIRING DIACRAM

ROCKER SWITCH

WH

WH

SYNC. M.

POWER INPUT

WH(BL)BK(BR)
(Ribbed)

(Plain)

NO.

1 POWER CORD 1
2 ROTARY SWITCH 1
3 FAN MOTOR 1
4 CAPACITOR 1
5 THERMOSTAT 1
6 COMPRESSOR 1
7 SYNCHRONOUS MOTOR 1

Q'TY PER SET

DESCRIPTION

—26—

6. EXPLODED VIEW

• MODEL: HQ-2243TH,LWC081

11

4

4

5

3

2

6

1

13

5

9

6

14

17

19

23

24

1

6 1 4

7

8

2

1

9

3

4

3

2

5

3

2

5

18

12

15

16

20

7

10

16

8

22

O

wner's M

anual

A

C

B

D

21

—27—

7. REPLACEMENT PARTS LIST

• MODEL: HQ-2243TH

PART NO.

DESCRIPTION

REMARK

A FRONT GRILLE ASS'Y CW353110189B R

1 GRILLE, FRONT CW353010138A
2 INLET, GRILLE CW353010139A
3 AIR FILTER ASS'Y CW5231R6159F
4 HORIZONTAL LOUVER CW4758R7264J
5 HORIZONTAL LOUVER CW4758R7278J

B COMP&ACCESSORY ASS'Y

1 ANTI-VIBRATION BUSH CW4022-L005A
2 COMPRESSOR CW2520HFK2CA R
3 GASKET CW4986-L004A
4 TERMINAL COVER CW355030048C
5 BASE PAN WELD ASS'Y CW304110010F
6 BARRIER, SINGLE CW479010036A
7 SCROLL CW307220009A
8 AIR GUIDE ASSEMBLY CW523920001V

9 CABINET ASS'Y CW3091R6056A
10 DAMPER ASS'Y CW4900R7265A
11 MOUNT, MOTOR CW4960R2895B
12 MOTOR ASSEMBLY, SINGLE CW468120011L R
13 SHROUD CW4998R1602A
14 FAN, TURBO CW590120009A R
15 FAN, AXIAL CW5900R1330B R
16 CLAMP, SPRING CW3H02932C
17 ORIFICE CW494820014A
18 BRACE CW4800R7271A
19 EVAPORATOR ASSEMBLY, FIRST CW542120017N
20 CONDENSER ASSEMBLY, FIRST CW540320032F
21 VERTICAL LOUVER CW4758R6157A
22 OPERATING INSTRUCTION CW382820046H
23 INSTALLATION KIT CW3127R3403U R
24 UPPER GUIDE CW2H00858D

C CONTROL BOX ASSEMBLY CW499520088N

1 CONTROL BOX , SINGLE CW4994R1587A

2 CONTROL PANEL CW372120058J

3 KNOB ASS'Y CW494130001M

4 CAPACITOR CW6120R2194P R

5 POWER CORD ASS'Y CW2H00677U R

6 THERMOSTAT CW2H01109L R

7 COVER CW355130001A

8 ROTARY, SWITCH CW2H00598E R

9 MOTOR ASSY, SYNC CW2H01102A R

D PIPE

1 TUBE ASSEMBLY, SUCTION INDOOR CW521110094B

2 TUBE ASSEMBLY, DISCHARGE SINGLE CW521130325D

3 TUBE ASSEMBLY, EVAPORATOR CW521030144U

4 TUBE ASSEMBLY, EVAPORATOR CW521030144V

5 TUBE, CAPILLARY BEND CW521130296E

6 DRIER ASSEMBLY CW585130001K

LOCATION

NO.

R: RECOMMANDABLE PARTS.

September, 2003

P/No.: 3828A20163N Printed in Korea