KEYSTONE KSTHW08A Room Air Conditioner User Manual

: June 4, 2024
: Keystone

Table of Contents

KEYSTONE KSTHW08A Room Air Conditioner
IMPORTANT SAFETY INSTRUCTIONS
INSTALLATION INSTRUCTIONS
NORMAL SOUNDS
AIR CONDITIONER FEATURES
AIR CONDITIONER FEATURES
CARE AND CLEANING
TROUBLESHOOTING TIPS
References
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KEYSTONE KSTHW08A Room Air Conditioner

KEYSTONE KSTHW08A Room Air Conditioner-PRO

IMPORTANT SAFETY INSTRUCTIONS

READ THIS MANUAL
Inside you will find many helpful hints on how to use and maintain your air conditioner properly. Just a little preventive care on your part can save you a great deal of time and money over the life of your air conditioner. You’ll find many answers to common problems in the chart of troubleshooting tips. If you review our chart of Troubleshooting Tips first, you may not need to call for service at all.

To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring of instructions may cause harm or damage. The seriousness is classified by the following indications.

WARNING| This symbol indicates the possibility of death or serious injury.
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CAUTION| This symbol indicates the possibility of injury or damage to property.
| Never do this.| | Always do this.

CAUTION

This appliance is not intended for use by persons (including children) with reduced physical ,sensory or mental capabilities or lack of experience and knowledge,unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
Children should be supervised to ensure that they do not play with the appliance.
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
The appliance shall be installed in accordance with national wiring regulations.
Do not operate your air conditioner in a wet room such as a bathroom or laundry room.
The appliance with electric heater shall have at least 1 meter space to the combustible materials.
Contact the authorised service technician for repair or maintenance of this unit.
Contact the authorised installer for installation of this unit.

NOTE:
The power supply cord with this air conditioner contains a current detection device designed to reduce the risk of fire. Please refer to the section Operation of Current Device for details.In the event that the power supply cord is damaged, it cannot be repaired-it must be replaced with a cord from the Product Manufacturer.

WARNING
Avoid fire hazard or electric shock. Do not use an extension cord or an adaptor plug. Do not remove any prong from the power cord.

Grounding type wall receptacle

Power supply cord with 3-prong grounding plug and current detection device

WARNING
For Your Safety
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WARNING
Prevent Accidents
To reduce the risk of fire, electrical shock, or injury to persons when using your air conditioner, follow basic precautions, including the following:

Be sure the electrical service is adequate for the model you have chosen. This information can be found on the serial plate, which is located on the side of the the cabinet and behind the grille.
If the air conditioner is to be installed in a window, you will probably want to clean both sides of the glass first. If the window is a triple-track type with a screen panel included, remove the screen completely before installation.
Be sure the air conditioner has been securely and correctly installed according to the installation instructions in this manual. Save this manual for possible future use in removing or installing this unit. When handling the air conditioner, be careful to avoid cuts from sharp metal fins on front and rear coils.

Do not, under any circumstances, cut, remove, or bypass the grounding prong. Power supply cord with 3-prong grounding plug and current detection device

WARNING
Electrical Information
The complete electical rating of your new room air conditioner is stated on the serial plate. Refer to the rating when checking the electrical requirements.
Be sure the air conditioner is properly grounded. To minimize shock and fire hazards, proper grounding is important. The power cord is equipped with a three-prong grounding plug for protection against shock hazards. Your air conditioner must be used in a properly grounded wall receptacle. If the wall receptacle you intend to use is not adequately grounded or protected by a time delay fuse or circuit breaker, have a qualified electrician install the proper receptacle. Ensure the receptacle is accessible after the unit installation. Do not run air conditioner without side protective cover in place.This could result in mechanical damage within the air conditioner. Do not use an extension cord or an adapter plug.

Operation of Current Device
(Applicable to the unit adopts current detection device only )

The power supply cord contains a current device that senses damage to the power cord. To test your power supply cord do the following:

Plug in the Air Conditioner.
The power supply cord will have TWO buttons on the plug head. Press the TEST button, you will notice a click as the RESET button pops out.
Press the RESET button, again you will notice a click as the button engages.
The power supply cord is now supplying electricity to the unit. (On some products this it also indicated by a light on the plug head.)

NOTE:

Do not use this device to turn the unit on or off.
Always make sure the RESET button is pushed in for correct operation.
The power supply must be replaced if it fails reset when either the TEST button is pushed, or it cannot be reset. A new one can be obtained from the product manufacturer.
If power supply cord is damaged, it cannot be repaired. It MUST be replaced by one obtained from the product manufacturer.
NOTE: This air conditioner is designed to be operated under condition as follows:Cooling operation| Outdoor temp:| 64-109OF/18-43OC (64-125OF/18-52OC for special tropical models)
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Indoor temp:| 62-90OF/17-32OC
Heating operation| Outdoor temp:| 23-76OF/-5-24OC
Indoor temp:| 32-80OF/0-27OC

Note: Performance may be reduced outside of these operating temperatures

INSTALLATION INSTRUCTIONS

CAUTION
To avoid risk of personal injury, property damage, or product damage due to the weight of this device and sharp edges that may be exposed:

Air conditioners covered in this manual pose an excessive weight hazard. Two or more people are needed to move and install the unit.To prevent injury or strain, use proper lifting and carrying techniques when moving unit.
Carefully inspect location where air conditioner will be installed. Be sure it will support the weight of the unit over.
Handle air conditioner with care. Wear protective gloves whenever lifting or carrying the unit. AVOID the sharp metal fins of front and rear coils.
Make sure air conditioner does not fall during installation.

Tools and Parts:
Gather the required tools and parts before starting installation. Read and follow the instructions provided with any tools listed here.

TOOLS NEEDED

Flat-blade and Phillips screwdrivers| Tape measure
Level| Drill and 3/16 , 1/8 , 3/32 , or smaller drill bit

Through-the-wall Installation:
In addition to the tools listed above, the following tools are needed for through-the-wall installation.

TOOLS NEEDED

Saw| Caulk
1 (2.5 cm) or thicker lumber| #10 X 1 wood screws (7)

Parts Supplied
Check that all parts are included in parts package:

NOTE:

Installation parts are supplied for double-hung windows up to 36 (91.4 cm) wide. A special Wide Window Kit is available from your dealer or service center. See Accessories .
Do not use any screws other than those specified here.

Location Requirements:
IMPORTANT: Observe all governing codes and ordinances. Check the location where air conditioner will be installed.Proper installation is your responsibility. Make sure you have everything necessary for correct installation.

Grounded electrical outlet within 4 ft (122 cm) of where the power cord exits the air conditioner.
Free movement of air in room to be cooled.
A large enough opening for the air conditioner.
Adequate wall support for weight of air conditioner. Air conditioner weights between 70 and 85 Ibs (32 to 40 kgs).

NOTE:

Do not use an extension cord.
Cabinet louvers must not be obstructed. Air must be able to pass freely through the cabinet louvers. (FIG.1)

Window Installation
Window opening measurements (FIG.2) :

26-7/8 to 36 (68.3 cm to 91.4 cm) opening width.
16-1/2 (41.9 cm) minimum opening height.

Remove packaging material

Remove and dispose of / recycle packaging materials. Remove tape and glue residue from surfaces before installing the air conditioner. Rub a small amount of liquid dish soap over the adhesive with your fingers. Wipe with warm water and dry.
Do not use sharp instruments, rubbing alcohol, flammable fluids, or abrasive cleaners to remove tape or glue. These products can damage the surface of your air conditioner.
Handle the air conditioner gently.

Remove the air conditioner from the carton and place it on cardboard.
Remove 1 shipping screw from each side of the cabinet (FIG.3).
Remove front panel by removing 1 Phillips screw from each side of the front panel. Set screws a side and save (FIG.4).
Pull on the handles to slide the air conditioner out of the cabinet. Place the air conditioner on cardboard (FIG.5).

NOTE:
Installation parts are supplied for double-hung windows up to 36 (91.4 cm) wide. A special Wide Window Kit is available from your dealer or service center. See Accessories . Do not use any screws other than those specified here.

NOTE:

Handle the air conditioner gently.
Be sure your air conditioner cabinet does not fall out of the opening during installation or removal.
The place where the power cord exits the air conditoner should be no more than 4 ft (122 cm) from a grounded 3 prong outlet.
Do not block the louvers on the front panel.
Do not block the louvers on the outside of air conditioner.
Do not lift, pull or remove any expanded polystyrene (foam) from inside of the air conditioner. It is not packing material

Attach Top Channel (FIG.6):

NOTE:

Attach the top channel and side curtains to the air conditioner cabinet before placing the cabinet in the window.

Locate provided bag of screws.
Place the top channel on top of the air conditioner cabinet, lining up the three holes in the top channel with the three holes on top of the air conditioner cabinet.
Using three pan-head Phillips thread cutting screws, attach the top channel to the air conditioner cabinet.

Attach Side Curtains

Locate provided bag of screws.
Insert the right-hand curtain connector tab into the curtain housing channels on the air conditioner (FIG.7A).
Insert the top and then the bottom of the right-hand curtain housing in the top and bottom curtain channels on theair conditioner (FIG.7B, FIG.7C).
Slide the curtain housing into the curtain guides as far as it could go.
Repeat the above steps for the left-hand curtain.

Attach foam adhesive seal
Attach foam adhesive seal along the bottom of the curtain bottom channel (FIG.8).

Install Cabinet into Window

Center empty cabinet in the window:
Check that lower rail of air conditioner cabinet is behind and against back side of the window sill. Maintain a firm hold on the air conditioner cabinet (FIG.9). Lower window sash to hold the cabinet in place.
Measure the distance between the right side of the cabinet and the inside of the window channel (FIG.10). Repeat for the left side. Adjust the cabinet until the distance on each side is the same.
Attach the cabinet to the window:
A: For wooden window:
Use a 3/ 16″drill bit to drill three starter holes 3/8″deep through the three holes in the cabinet and into the window sill ,and drill one starter hole 3/8”deep through the hole in the middle of top rail and into the window frame (FIG.11 ). Attach cabinet to window with three #10 x 1 /2”pan-head Phillips screws and one #10 X 3/4” or (1 /2 ”)round-head screw (FIG.11 ).
B: For Vinyl-Clad window:Use a 1 /8” drill bit to drill one hole through the hole in the middle of top rail and into the window frame.
Attach cabinet to window with one #10 x 3/4” or(1 /2 ” )round-head Phillips screw (FIG.11 ). Place two safety locks into the holes that located in the bottom of the cabinet and drive two locking screws through the safety locks into the cabinet as shown (FIG.12)
Check that air conditioner cabinet is tilted back about 11/;to1 1/;(tilted about 3°to 4° downward to the outside).
After proper installation, condensate should not drain from the overflow drain hole during normal use, correct the slope otherwise. (See FIG.13).

Attach Side Curtains to Window Frame

Extend the side curtains out against the window frame (FIG.11).
Drill holes and drive locking screws:
A: For wooden windows:
Use a 3/32 drill bit to drill 4 starter holes through the holes in the side curtains into the window. Drive four #10 X 3/4 or (1/2 )
Lockingscrews through the holes in the side curtains into the window sill and window frame(FIG.14A, FIG.14B).
B: For Vinyl-Clad windows:
Use a 1/8 drill bit to drill two holes through the holes in the side curtains into the window frame as shown (FIG.14A).
Drive two #10 X 3/4 or (1/2 )locking screws through the holes in the side curtains into the window sash (FIG.14A)
Trim the weather seal (6 X3/4 X1/12 ) with a proper length, peel off the protective backing and plug any gaps if needed as shown (FIG.14B).

Complete Installation

Insert window sash seal behind the top of the lower window sash and against the glass of the upper window (FIG.15).
Place the window-lock bracket on top of lower window and against upper window sash on right side of the window (FIG.15).
Use a 3/32 drill bit to drill starter holes through the holes in the bracket into the window sash (FIG.15).
Attach the window lock-bracket to the window sash with two #10 X 3/4 or or (1/2 )round-head screws to secure window in place (FIG.15).
Insert air conditioner into cabinet (FIG.16).
Insert front tabs of front panel into top of cabinet and swing front into place.
Attach bottom front of panel with front panel screws (FIG.17).
Plug into a grounded 3 prong outlet.
Press RESET on the power supply cord.

Through-the-Wall Cabinet Installation

Option 1 wood, metal or plastic molding:
When using a wood, metal or plastic molding, the wood frame should line up with the inside wall as shown FIG.18 Option 2 Plastered wall with no molding:
If the plastered wall is to be flush with the cabinet and no molding is used, the wood frame must be set 1/2 (13mm) into the inside wall FIG.19.

Install Wood Frame

Construct the wood frame. See FIG.20 for dimensions.
Measure the outside width and height of frame to determine wall opening dimensions. The wall opening measurements should be :
● Width : 22-5/8 (57.5 cm) plus twice thickness of wood used to build frame.
● Height: 16 (40.6 cm) plus twice thickness of wood used to build frame.
● Depth : 2-1/2 (6.4 cm) minimum to 6-1/2 (16.5 cm) maximum.
Cut the opening through the wall. Remove and save insulation.
Apply the wood preservative to the outside exposed surface.
Insert the frame in the wall opening. Square and level frame.
Attach frame securely to the wall.

NOTE:

Do not overtighten screws or the cabinet will distort and provide a poor air seal between cabinet and air conditioner.

Complete Installation

Insert air conditioner into cabinet (FIG.24).
Insert front tabs of front panel into top of cabinet and swing front into place.
Attach bottom front of panel with front panel screws (FIG.25).
Plug into a grounded 3 prong outlet.
Press RESET on the power supply co

NOTE:

Handle the air conditioner gently .
For through-the-wall installations, if needed, install molding around the room side of cabinet.

NORMAL SOUNDS

NOTE:
All the illustrations in this manual are for explanation purpose only. Your air conditioner may be slightly different. The actual shape shall prevail.

AIR CONDITIONER FEATURES

ELECTRONIC CONTROL OPERATING INSTRUCTIONS
Before you begin, thoroughly familiarize yourself with the control panel as shown below and all its functions, then follow the symbol for the functions you desire. The unit can be controlled by the unit control alone or with the remote.

TO TURN UNIT ON OR OFF:
Press ON/OFF button to turn unit on or off.
NOTE:Th e unit wil l i niti a te a utomatically the Energy Saver function under Cool, Dry, Auto(only Auto-Cooling and Auto-Fan) modes.

TO CHANGE TEMPERATURE SETTING:
Press UP/DOWN button to change temperature setting.
NOTE: Press or hold either UP(▲) or DOWN (▼) button until the desired temperature is seen on the display.
This temperature will be automatically maintained anywhere between 62° F(17° C) and 86° F(30°C). If you want the display to read the actual room temperature, see To Operate on Fan Only section.

TO ADJUST FAN SPEEDS:
Press ****to select the Fan Speed in four steps-Auto, Low, Med or High. Each time the button is pressed, the fan speed mode is shifted.For some models, the fan speed can not be adjusted under HEAT mode. On Dry mode,the fan speed is controlled at Low automatically.

SLEEP FEATURE:
Press ****Sleep button to initiate the sleep mode. In this mode the selected temperature will increase (cooling) or decrease (heating) by 2OF/1(or 2)OC 30 minutes after the mode is selected.The temperature will then increase (cooling) or decrease (heating) by another 2OF/1(or 2)OC after an additional 30 minutes. This new temperature will be maintained for 6 hours before it returns to the originally selected temperature. This ends the Sleep mode and the unit will continue to operate as originally programmed. The Sleep mode program can be cancelled at any time during operation by pressing the Sleep button again.

CHECK FILTER FEATURE:
Press ****Check filter button to initiate theis feature. This feature is a reminder to clean the Air Filter for more efficient operation. The LED(light) will illuminate after 250 hours of operation. To reset after cleaning the filter, press the Check Filter button and the light will go off.

ENERGY SAVER FEATURE:
Press ****Energy saver button to initiate this function. This function is available on COOL, DRY, AUTO (only AUTO-COOLING and AUTO-FAN) modes.The fan will continue to run for 3 minutes after the compressor shuts off.The fan then cycles on for 2 minutes at 10 minute intervals until the room temperature is above the set temperature, at which time the compressor turns back on and Cooling Starts.

FOLLOW ME FEATURE:(on some models)

This feature can be activated from the remote control ONLY. The remote control serves as a remote thermostat allowing for the precise temperature control at its location.
To activate the Follow Me feature, point the remote control towards the unit and press the Follow Me button. The remote display is actual temperature at its location. The remote control will send this signal to the air conditioner every 3 minutes interval until press the Follow Me button again.If the unit does not receive the Follow Me signal during any 7 minutes interval, the unit will beep to indicate the Follow Me mode has ended.

TO SELECT THE OPERATING MODE:
To choose operating mode, press ****Mode button.Each time you press the button, a mode is selected in a sequence that goes from Auto, Cool, Dry ,heat(cooling only models without)and Fan. The indicator light beside will be illuminated and remained on once the mode is selected.
The unit will initiate automatically the Energy Saver function under Cool, Dry, Auto(only Auto-Cooling and Auto-Fan) modes.

To operate on Auto feature:

When you set the air conditioner in AUTO mode, it will automatically select cooling, heating(cooling only models without), or fan only operation depending on what temperature you have selected and the room temperature.
The air conditioner will control room temperature automatically round the temperature point set by you.
In this mode, the fan speed cannot be adjusted, it starts automatically at a speed according to the room temperature.

To operate on Fan Only:

Use this function only when cooling is not desired,such as for room air circulation or to exhaust stale air(on some models). (Remember to open the vent during this function, but keep it closed during cooling for maximum cooling efficiency.) You can choose any fan speed you prefer.
During this function, the display will show the actual room temperature, not the set temperature as in the cooling mode. In Fan only mode ,the temperature is not adjusted.

To operate on Dry mode:

In this mode, the air conditioner will generally operate in the form of a dehumidifier. Since the conditioned space is a closed or sealed area, some degree of cooling will continue.

TIMER: AUTO START/STOP FEATURE:

When the unit is on or off, first press Timer button, the TIMER ON indicator light illuminates. It indicates the Auto Start program is initiated.
When the time of TIMER ON is displayed ,press the Timer button again, the TIMER OFF indicator light illuminates. It indicates the Auto Stop program is initiated.
Press or hold the UP or DOWN button to change the Auto time by 0.5 hour increments, up to 10 hours,then at 1 hour increments up to 24 hours.
The control will count down the time remaining until start. The selected time will register in 5 seconds, and the system will automatically revert back to display the previous temperature setting or room temperature when the unit is on.(when the unit is off,there is no display.)
Turning the unit ON or OFF at any time or adjusting the timer setting to 0.0 will cancel the Auto Start/Stop timed program.

AIR CONDITIONER FEATURES

DISPLAYS

DISPLAYS:
Shows the set temperature in ” OC” or ” OF” and the Auto-timer settings.While on Fan only mode,it shows the room temperature.

Error codes:
AS-Room temperature sensor error-Unplug the unit and plug it back in.If error repeats, call for service.
NOTE: In Fan only mode,it will display”LO” or “HI”. -Evaporator temperature sensor error-Unplug the unit and plug it back in.If error repeats, call for service.
NOTE: “●”is displayed as shown in the left picture.
HS -Electric heating sensor error-Unplug the unit and plug it back in.If error repeats, call for service.

NOTE:
If the unit breaks off unexpectedly due to the power cut, it will restart with the previous function setting automatically when the power resumes.

Air Directional Louvers

The 4-way air directional louvers allow you to direct the air flow Up or Down(on some models) and Left or Right throughout the room as needed.
To adjust the air directional louvers side-to -side, use the center handles as you move it side-to-side.

ADDITIONAL THINGS YOU SHOULD KNOW

Now that you have mastered the operating procedure, here are more features in your control that you should become familiar with.

The Cool circuit has an automatic 3 minute time delayed start if the unit is turned off and on quickly.
This prevents overheating of the compressor and possible circuit breaker tripping.The fan will continue to run during this time.
The control is capable of displaying temperature in degrees Fahrenheit or degrees Celsius. To convert from one to the other, press and hold the Left and Right Temp/Timer buttons at the same time, for 3 seconds.

CARE AND CLEANING

Cabinet Cleaning

Be sure to unplug the air conditioner to prevent shock or fire hazard. The cabinet and front may be dusted with an oil-free cloth or washed with a cloth dampened in a solution of warmwater and mild liquid dishwashing detergent. Rinse thoroughly and wipe dry.
Never use harsh cleaners, wax or polish on the cabinet front.
Be sure to wring excess water from the cloth before wiping around the controls. Excess water in or around the controls may cause damage to the air conditioner.
Plug in air conditioner.

Winter Storage
If you plan to store the air conditioner during the winter, remove it carefully from the window according to the installation instructions. Cover it with plastic or return it to the original carton.

TROUBLESHOOTING TIPS

Before calling for service, review this list. It may save your time and expense. This list includes common occurrences that are not the result of defective workman-ship or materials in this appliance.

Problem| | Solution
Air conditioner does not start| Wall plug disconnected. Push plug firmly into wall outlet.
House fuse blown or circuit breaker tripped. Replace fuse with time delay type or reset circuit breaker.
Plug Current Device Tripped. Press the RESET button.
Power is OFF. Turn power ON.
**Air from unit does not feel cold enough| Room temperature below 62 OF(17 OC ). Cooling may not occur until room temperature rises above 62 OF(17 OC).
Temperature sensing behind air filter element touching cold coil. Keep it from the cold coil.
Set to a Lower temperature.
Compressor stopped when changing modes. Wait for 3 minutes after set to the COOL mode.
Air conditioner cooling, but room is too warm- ice forming on cooling coil behind decorative front.| Outdoor temperature below 64 OF(18 OC). To defrost the coil, set FAN ONLY mode.
Air filter may be dirty. Clean filter. Refer to Care and Cleaning section. To defrost, set to FAN ONLY mode.
Thermostat set too cold for night-time cooling. To defrost the coil, set to FAN ONLY mode. Then, set temperature to a Higher setting.
Air conditioner cooling, but room is too warm- NO ice forming on cooling coil behind decorative front.| Dirty air filter- air restricted. Clean air filter. Refer to Care and Cleaning section.
Temperature is set too High, set temperature to a Lower setting.
Air directional louvers positioned improperly. Position louvers for better air distribution.
Front of units is blocked by drapes, blinds, furniture, etc. – restricts air distribution. Clear blockage in front of unit.
Doors, windows, registers, etc. Open- cold air escapes. Close doors, windows, registers.
Unit recently turned on in hot room. Allow additional time to remove Stored heat from walls, ceiling, floor and furniture.
Air conditioner turns on and off rapidly| Dirty air filter- air restricted. Clean air filter.
Outside temperature extremely hot. Set FAN speed to a Higher setting to bring air past cooling coils more frequently.
Noise when unit is cooling**| Air movement sound. This is normal . If too loud, set to a slower FAN setting.