Quasar HQ-2243TH Room Air Conditioner Owner’s Manual

: July 27, 2024
: QUASAR

Table of Contents

HQ-2243TH Room Air Conditioner
Product Specifications
Product Usage Instructions
1. Safety Precautions
2. Disassembly Instructions
3. Installation
4. Troubleshooting Guide
- Frequently Asked Questions (FAQ)
Q: Can I service the air conditioner myself?
Q: Is it normal for the air conditioner to make noise?

HQ-2243TH Room Air Conditioner

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Product Specifications

Model: QUASAR HQ-2243TH
Order No.: RAC0212002C1 E9
Factory-charged refrigerant

Product Usage Instructions

1. Safety Precautions

Before using or servicing the air conditioner, ensure to follow
these safety precautions:

Set the ROTARY SWITCH or POWER SWITCH to OFF and unplug the
power cord before servicing.
Replace parts damaged by short circuits and perform an
insulation resistance test after servicing to prevent shock
hazards.

2. Disassembly Instructions

The disassembly instructions guide you on how to access
different parts of the air conditioner for maintenance or
repairs:

Mechanical Parts:
- Front Grille
- Cabinet
- Control Box
Air Handling Parts:
- Cover (At the Top)
- Blower
- Fan
- Shroud
Electrical Parts:
- Motor
- Compressor
- Capacitor
- Power Cord
- Thermostat
- Rotary Switch
- Synchronous Motor
Refrigeration Cycle:
- Condenser
- Evaporator
- Capillary Tube

3. Installation

Follow these steps for proper installation of the air
conditioner:

Read the installation manual thoroughly.
Ensure the window requirements are met.
Check the contents of the installation kit.
Use suggested tools for installation.
Properly install the cabinet.

4. Troubleshooting Guide

If you encounter issues with the air conditioner, refer to the
troubleshooting guide for assistance:

Check outside dimensions and piping system.
Follow the troubleshooting steps provided.

Frequently Asked Questions (FAQ)

Q: Can I service the air conditioner myself?

A: While basic maintenance like cleaning filters can be done by
users, it is recommended to have a professional service technician
handle any internal repairs to avoid safety hazards and maintain
warranty validity.

Q: Is it normal for the air conditioner to make noise?

A: Some noise is normal during operation due to the compressor
and fan running. However, excessive or unusual noises may indicate
a problem that requires inspection by a technician.

“`

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QUASAR HQ-2243TH Owner’s Manual
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ORDER NO. RAC0212002C1 E9
Service Manual Room Air Conditioner HQ-2243TH
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.

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.

–2–

1.3 FEATURES
· DESIGNED FOR COOLING ONLY · POWERFUL AND INCREDIBLE COOLING · BUILT-IN ADJUSTABLE THERMOSTAT · WASHABLE ONE-TOUCH FILTER · COMPACT SIZE

1.4 SPECIFICATIONS

ITEMS

MODELS

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

INDOOR

FAN

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 DIMENSION(WHD)

lbs(kg) 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
146(66) 26 1627/32 3023/32 (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

Figure 3

–6–

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 FreonTM
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. 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

–8–

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.)

Figure 11 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.
Figure 13
–9–

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 FreonTM 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.

2.4.1 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)

Figure 16

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 17

–11–

NOTES
— Replacement of the refrigeration cycle.
1. When replacing the refrigeration cycle, be sure to discharge the refrigerant system using a FreonTM 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.

Connect the vacuum pump, as illustrated Fig. 18.
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.
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.
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.
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.

–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

A B
EXTERNAL VACUUM PUMP

LOW HI

B

A

CHARGING CYLINDER
C

Figure 18 – Pulling Vacuum –13–

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

30-60″

1/4 Bubble

Level

AWNING

FENCE

HEAT RADIATION

About 1/2″ Over 20″

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)

Offset Less than 1 1/4″ Sill
Exterior

–14–

3.3 INSTALLATION KITS CONTENTS
Foam-PE (Adhesive-Backed)

Foam strip (Plain-Back)

Foam-PE (Adhesive-Backed)

Left frame curtain

Frame guide(2) Window locking bracket Sill bracket(2)

Support bracket(2)

Drain pipe Right frame curtain

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.

Figure 20

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.

Figure 21

Top retainer bar

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.

FOAM-PE Figure 22
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.
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.

Cabinet Track hole Support Bracket
Carriage bolt and lock nut Figure 25
Top retainer bar Figure 26

Machine screw (Type D) and lock nut
Outer edge of window sill Screw(Type B) Sill bracket
Window stool Front angle

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.

Window sash Top retainer bar Foam-PE
Cabinet Frame curtain Foam-PE
Figure 27
Sash track

–17–

Figure 28

Front Angle Screw(Type B)

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)

Figure 29
Screw Figure 30
Figure 31

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 32 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
3023/32 (770)

26(660)

1627/32 (428)

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

COOLED AIR

COMPLETE LIQUID BOIL OFF POINT

SUCTION LIME COOL LOW PRESSURE VAPOR

ROOM AIR HEAT LOAD

CONDENSER COILS
VAPOR INLET HOT
DISCHARGED
AIR

LIQUID PRESSURE DROP

MOTOR

OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH

COMPRESSOR
OIL
(LIQUID REFRIGERANT) CAPILLARY TUBE
Figure 35 –19–

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.
Dirty indoor coil (Heat exchanger)
Malfunction of fan
Clogged of air filter
Obstruction at air outlet
Stop of auto air-swing
Correct above trouble
Check clogging in refrigeration circuit.
Repair clogging in refrigeration circuit.

Check of outdoor coil (heat exchanger) & the fan operation.
Check gas leakage.
Repair gas leak.
Replacement of unit if the unit is beyond repair.

Check heat load increase.
Unexpected residue
Overloaded Circuit
Check of inside gas pressure.
Adjusting of refrigerant charge

Malfunction of compressor

Satisfactory operation with temperature difference of inlet & outlet air ; 44.6~50°F
–20–

Replacement of compressor

Fails to Start

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.

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

Irregular motor resistance ( )
Irregular motor insulation ( )
Replacement of compressor (Motor damaged)

–21–

Regular but fails to start
Replacement of compressor (locking of rotor, metal)

COMPLAINT Fan motor will not run.
Fan motor runs intermittently Fan motor noise.

CAUSE 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

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.

–22–

COMPLAINT
Compressor will not run, but fan motor runs.

CAUSE Voltage
Wiring

Rotary Thermostat

Compressor cycles on overload.

Capacitor (Discharge capacitor before servicing.) Compressor
Overload
Voltage Overload
Fan motor Condenser air flow restriction

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

POWER INPUT

1

BK(BR)

WH(BL)

(Plain)

(Ribbed)

2 3

6
5
WIRING DIACRAM

4
SYNC. M. 7
WH WH
ROCKER SWITCH

NO.

DESCRIPTION

1

POWER CORD

2

ROTARY SWITCH

3

FAN MOTOR

4

CAPACITOR

5

THERMOSTAT

6

COMPRESSOR

7

SYNCHRONOUS MOTOR

Q’TY PER SET
1 1 1 1 1 1 1

–25–

6. EXPLODED VIEW
· MODEL: HQ-2243TH
B
8

Owner’s Manual
22 14
17 19
16

21 10

23

6
7 9

16

18

15

13 12

11

20

24
A
3 2

5

4

3

2

C
1

6

1

4

D3

1 5

2 8

2 4 6

5

4

3

9

5

7 1

–26–

7. REPLACEMENT PARTS LIST

· MODEL: HQ-2243TH

LOCATION NO.
A 1 2 3 4 5 B 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 C 1 2 3 4 5 6 7 8 9 D 1 2 3 4 5 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

REMARK R

CW4022-L005A

CW2520HFK2CA

R

CW4986-L004A

CW355030048C

CW304110010F

CW479010036A

CW307220009A