ORDER NO. RAC0212002C1

E9

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.

CONTENTS

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.

—2—

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 1M

Ω

.

1.3 FEATURES

• DESIGNED FOR COOLING ONLY

• POWERFUL AND INCREDIBLE COOLING

• BUILT-IN ADJUSTABLE THERMOSTAT

• WASHABLE ONE-TOUCH FILTER

• COMPACT SIZE

1.4 SPECIFICATIONS

MODELS

ITEMS

POWER SUPPLY Ø, V, Hz

COOLING CAPACITY Btu/h.

POWER INPUT

RUNNING CURRENT

EER

OPERATING INDOOR

W

A

Btu/h.W

°F(°C)

CONDITION OUTDOOR °F(°C)

REFREIGERANT (R-22) CHARGE

EVAPORATOR

CONDENSER

FAN

FAN SPEED

FAN MOTOR

OPERATION CONTROL

ROOM TEMP. CONTROL

INDOOR

OUTDOOR

FAN/COOLING

AIR DIRECTION

CONTROL

CONSTRUCTION

VERTICAL

HORIZONTAL

PROTECTOR

COMPRESSOR

FAN MOTOR

POWER CORD

DRAIN SYSTEM

NET WEIGHT lbs(kg)

DIMENSION(W*H*D) inch(mm)

HQ-2243TH

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

26 * 16 27 /

32

146(66)

* 30 23 /

32

(660 * 428 * 770)

* DB:Dry Bulb

** WB:Wet Bulb

❈

The specifications will be changed without notice for further improvement.

—3—

1.5 CONTROL LOCATIONS

• 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 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.

• 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.

CAUTION

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.

—4—

• 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.

Part B

Part A

CLOSE VENT OPEN

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.

• VERTICAL AIR-DIRECTION CONTROL

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

• HORIZONTAL AIR-DIRECTION CONTROL

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

• 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.

Drain pipe

—5—

Drain cap

2. DISASSEMBLY INSTRUCTIONS

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

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.

Figure 1

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.)

Figure 2

—6—

Figure 3

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.

Figure 4

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 5

Figure 6

—7—

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.

—8—

Figure 7

Figure 8

Figure 9

Figure 10

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.

Figure 11

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.)

Figure 12

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.

—9—

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.

Figure 14

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.

Figure 15

—10—

2.4 REFRIGERATION CYCLE

CAUTION

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.

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)

Figure 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.

—11—

Figure 17

NOTES

— 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 Freon TM . 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.

CAUTION

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.

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 Lowside.

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.

—12—

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.

CONDENSER

(HIGH PRESSURE SIDE)

COMPOUND GAUGE

MANIFOLD

GAUGE

B

A

CAPILLARY TUBE

SEE INSETS

BELOW

EVAPORATOR

(LOW PRESSURE SIDE)

COMPRESSOR

B

A

EXTERNAL

VACUUM PUMP

Figure 18 - Pulling Vacuum

—13—

B

LOW

HI

A

CHARGING

CYLINDER

C

Figure 19 - Charging

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.

FOAM

COOLED

AIR

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

Stool

Interior wall

26" min.

(Without frame curtain)

1/4 Bubble

AWNING

FENCE

HEAT

RADIATION

About 1/2"

Over 20"

Offset

Less than 1

1

/

4

"

Sill

Exterior

Level

—14—

3.3 INSTALLATION KITS CONTENTS

Foam-PE

(Adhesive-Backed)

Foam strip

(Plain-Back)

Foam-PE

(Adhesive-Backed)

Left frame curtain

Drain pipe

Frame guide(2)

Window locking bracket

Sill bracket(2)

Right frame curtain

Support bracket(2)

Type A (14)

Type B (7) Type C (5) Type D (2)

Carriage Bolt (2) Lock Nut (4)

—15—

3.4 SUGGESTED TOOL REQUIREMENTS

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

3.4.1 PREPARATION OF CHASSIS

Shipping screws

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.

Figure 20

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.

Figure 21

FOAM-PE

Figure 22

Top retainer bar

Top retainer bar

FOAM-PE

Screw

(Type A)

Figure 23

Frame guide

Screw(Type A)

—16—

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.

Sill

Bracket

Carriage

Bolt

(M-Screw)

Figure 24

Support

Bracket

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.

Cabinet

Track hole

Support

Bracket

Carriage bolt and lock nut

Figure 25

Machine screw (Type D) and lock nut

Outer edge of window sill

Screw(Type B)

Sill bracket

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.

Top retainer bar

Figure 26

Front angle

Window stool

Window sash

Top retainer bar

Foam-PE

Cabinet

Frame curtain

Foam-PE

Figure 27

Sash track

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.

—17—

Figure 28

Screw(Type B)

Front Angle

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.

Figure 29

Screw

Figure 30

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)

Figure 31

Figure 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.

Figure 33

—18—

Figure 34

Screw(Type C)

Power Cord

Screw (Type A)

Foam-Strip

Window locking bracket

4. TROUBLESHOOTING GUIDE

4.1 OUTSIDE DIMENSIONS

30

23

/

32

(770)

26(660)

4.2 PIPING SYSTEM

CONDENSER COIL

FAN

MOTOR

CAPILLARY TUBE

COMPRESSOR

BLOWER

EVAPORATOR COIL

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.

ROOM AIR CONDITIONER

CYCLE OF REFRIGERATION

EVAPORATOR COILS

COMPLETE LIQUID

BOIL OFF POINT

COOLED

AIR

ROOM AIR HEAT LOAD

SUCTION LIME

COOL LOW PRESSURE VAPOR

CONDENSER COILS

VAPOR INLET

HOT

DISCHARGED

AIR

LIQUID

PRESSURE

DROP

MOTOR

COMPRESSOR

OIL

(LIQUID REFRIGERANT)

CAPILLARY TUBE

Figure 35

—19—

OUTSIDE COOLING

AIR FOR REFRIGERANT

PASS THROUGH

LIQUID OUTLET

HIGH PRESSURE VAPOR

LIQUID PEFRIGERANT

LOW PRESSURE VAPOR

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 cold air circulation for smooth flow.

Check heat load increase.

Dirty indoor coil

(Heat exchanger)

Malfunction of fan

Clogged of air filter

Obstruction at air outlet

Stop of auto air-swing

Check of outdoor coil

(heat exchanger) & the fan operation.

Check gas leakage.

Repair gas leak.

Replacement of unit if the unit is beyond repair.

Unexpected residue

Overloaded Circuit

Check of inside gas pressure.

Adjusting of refrigerant charge

Malfunction of compressor

Correct above trouble

Replacement of compressor

Check clogging in refrigeration circuit.

Repair clogging in refrigeration circuit.

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

°

F

—20—

Check of power source.

Check of control switch setting.

Only compressor fails to start.

Drop of power voltage.

Defect of compressor capacitor.

Check capacitor.

Replacement.

Irregular motor resistance ( )

Irregular motor insulation ( )

Replacement of compressor

(Motor damaged)

Fails to Start

Improper thermostat setting

Loose terminal connection.

Improper wiring

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)

—21—

COMPLAINT

Fan motor will not run.

Fan motor runs intermittently

Fan motor noise.

No power

CAUSE

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

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 /

4 to 5 /

16 inch 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.

COMPLAINT

Compressor will not run, but fan motor runs.

Compressor cycles on overload.

Voltage

Wiring

Rotary

Thermostat

Voltage

Overload

Fan motor

Condenser air flow restriction

CAUSE

Capacitor (Discharge capacitor before servicing.)

Compressor

Overload

Condenser fins

(damaged)

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.

—23—

COMPLAINT

Compressor cycles on overload.

Insufficient cooling or heating

Excessive noise.

Auto air-swing fails.

CAUSE

Capacitor

Wiring

Refrigerating system

Air filter

Exhaust damper door

Unit undersized

Blower or fan

Copper tubing

Rotary switch.

Wiring

Synchronous motor.

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.

—24—

5. SCHEMATIC DIAGRAM

5.1 CIRCUIT DIAGRAM

• MODEL : HQ-2243TH

2

6

5

WIRING DIACRAM

BK(BR)

(Plain)

POWER INPUT

WH(BL)

(Ribbed)

1

3

4

7

SYNC. M.

WH

WH

ROCKER SWITCH

NO.

4

5

6

1

2

3

7

DESCRIPTION Q'TY PER SET

POWER CORD

ROTARY SWITCH

FAN MOTOR

CAPACITOR 1

THERMOSTAT 1

COMPRESSOR 1

SYNCHRONOUS MOTOR

1

1

1

1

—25—

6. EXPLODED VIEW

• MODEL: HQ-2243TH,LWC081

B

8

Owner's Manual

22

17

14

19

16

21

10

23

7

9

6

24

A

2

3

18

13

12

15

16

11

20

5 4

3

2

1

C

2

6 1 4

D

3

2

4

5

1

6

8

5

4

3

5

—26—

9

7

1

7. REPLACEMENT PARTS LIST

• MODEL: HQ-2243TH

LOCATION

NO.

14

15

16

17

18

19

8

9

10

11

12

13

20

21

22

23

24

5

B

1

2

3

4

A

1

2

5

6

7

3

4

8

9

6

7

D

1

2

3

4

5

C

1

4

5

2

3

6

DESCRIPTION

FRONT GRILLE ASS'Y

GRILLE, FRONT

INLET, GRILLE

AIR FILTER ASS'Y

HORIZONTAL LOUVER

HORIZONTAL LOUVER

COMP&ACCESSORY ASS'Y

ANTI-VIBRATION BUSH

COMPRESSOR

GASKET

TERMINAL COVER

BASE PAN WELD ASS'Y

BARRIER, SINGLE

SCROLL

AIR GUIDE ASSEMBLY

CABINET ASS'Y

DAMPER ASS'Y

MOUNT, MOTOR

MOTOR ASSEMBLY, SINGLE

SHROUD

FAN, TURBO

FAN, AXIAL

CLAMP, SPRING

ORIFICE

BRACE

EVAPORATOR ASSEMBLY, FIRST

CONDENSER ASSEMBLY, FIRST

VERTICAL LOUVER

OPERATING INSTRUCTION

INSTALLATION KIT

UPPER GUIDE

CONTROL BOX ASSEMBLY

CONTROL BOX , SINGLE

CONTROL PANEL

KNOB ASS'Y

CAPACITOR

POWER CORD ASS'Y

THERMOSTAT

COVER

ROTARY, SWITCH

MOTOR ASSY, SYNC

PIPE

TUBE ASSEMBLY, SUCTION INDOOR

TUBE ASSEMBLY, DISCHARGE SINGLE

TUBE ASSEMBLY, EVAPORATOR

TUBE ASSEMBLY, EVAPORATOR

TUBE, CAPILLARY BEND

DRIER ASSEMBLY

—27—

R: RECOMMANDABLE PARTS.

PART NO.

CW353110189B

CW353010138A

CW353010139A

CW5231R6159F

CW4758R7264J

CW4758R7278J

CW4022-L005A

CW2520HFK2CA

CW4986-L004A

CW355030048C

CW304110010F

CW479010036A

CW307220009A

CW523920001V

CW3091R6056A

CW4900R7265A

CW4960R2895B

CW468120011L

CW4998R1602A

CW590120009A

CW5900R1330B

CW3H02932C

CW494820014A

CW4800R7271A

CW542120017N

CW540320032F

CW4758R6157A

CW382820046H

CW3127R3403U

CW2H00858D

CW499520088N

CW4994R1587A

CW372120058J

CW494130001M

CW6120R2194P

CW2H00677U

CW2H01109L

CW355130001A

CW2H00598E

CW2H01102A

CW521110094B

CW521130325D

CW521030144U

CW521030144V

CW521130296E

CW585130001K

REMARK

R

R

R

R

R

R

R

R

R

R

R

P/No.: 3828A20163N

September, 2003

Printed in Korea