Keystone Mobile Room Air Conditioner Installation & Operations Manual

Air Conditioner Safety

Important safety messages are provided to prevent harm or damage. Always read and obey all safety messages.

\u25B2 WARNING: Indicates the possibility of death or serious injury.

\u25B2 CAUTION: Indicates the possibility of injury or damage to properties.

General Warnings:

• This appliance is not intended for use by persons with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless supervised or instructed by a responsible person.
• This unit is designed for indoor use only.
• The air conditioner must be grounded. Improper grounding may result in electric shocks.
• Place the unit on a horizontal ground to prevent tilting and sliding.
• Use a grounded breaker, time-delay fuse, or circuit breaker with the rated capacity to avoid electric shocks.
• Do not install the air conditioner in a place with flammable gas or liquid.
• If the power supply cord is damaged, it must be replaced by the manufacturer, its service agent, or a similarly qualified person.
• The specification of the fuse is printed on the circuit board (115V / Hz).
• Do not touch the louvers.
• Do not attempt to repair the air conditioner yourself.
• In a lightning storm, cut off the primary power supply switch to prevent machine damage.
• Do not use liquid or corrosive detergent to clean the appliance. Do not splash water or other liquids onto it, as this may damage plastic components or cause electric shocks.
• Do not operate the unit in wet rooms like bathrooms or laundry rooms.
• Do not touch the unit with wet or damp hands or when barefoot.
• If the unit is not fitted with a supply cord and plug, an all-pole switch with a contact separation of at least 3.0 mm must be installed in the fixed wiring. Do not use an extension cord.
• Do not pull the unit by the cord.
• Do not remove any part of the unit unless instructed by an authorized technician.
• Do not move the unit until the power has been cut off.
• Do not operate the unit with a damaged plug or a loose socket.
• Reset your power supply cord by pressing the RESET button on the LCDI plug.

Electrical Safety:

• Plug into a properly installed and grounded 3-prong outlet.
• Do not use an extension cord.
• Do not use an adapter.
• Do not remove the ground prong.

Operational Precautions:

• Do not block the air inlet or air outlet, as this will weaken cooling capacity and may cause the system to stop operating.
• Close windows and doors to maintain cooling capacity.
• Clean the air filter regularly, as a dirty filter weakens cooling capacity.

Notice for R410A Models:

Refrigerant leakage contributes to climate change. This appliance contains a refrigerant fluid with a Global Warming Potential (GWP) of 2088. Never interfere with the refrigerant circuit or disassemble the product yourself; always ask a professional.

Disposal:

• When disposing of the unit, consult your local dealer or recycling center for environmentally responsible disposal methods.
• Recycle or dispose of packing material in an environmentally responsible manner.

Compressor Oil Information:

[Image: Symbol indicating not to dispose of the unit in household waste, showing a crossed-out trash can on wheels.]

Parts Description

The descriptions in this user manual may vary slightly from your purchased model.

Front View:

• Air outlet
• Ambient light (only for some models)
• Front panel
• Control panel
• Carrying Handle (both sides)
• Air outlet

Rear View:

• Carrying Handle (both sides)
• Upper air filter (Behind the grille)
• Upper air intake
• Drain outlet
• Air outlet
• Lower air filter (Behind the grille)
• Lower air intake
• Power plug socket
• Pump drain outlet
• Power cord buckle
• Bottom tray drain outlet

Note: The working temperature range of the air conditioner is 16-35°C (60-95°F) in cooling mode and 5-27°C (41-80°F) in heating mode.

Control Panel

There are four types of control panels (Fig A, Fig B, Fig C, and Fig D). The actual shape prevails.

Function Buttons:

1. On-Off Button (1 / 0 / ⏻): Press to turn the unit on or off.
2. Filter Reset Button (2 / ⏚ / Ⓚ): Illuminates when the unit has run for 250 hours, indicating the air filter needs cleaning. Press after cleaning to reset the indicator and running time. If not reset, it remains illuminated except when the unit is powered off.
3. Fan Speed Button (3 / ⊕ / Ⓐ): Cycles through fan speeds: Auto -> High -> Medium -> Low. The corresponding indicator light illuminates. Note: Auto fan speed is not available in fan mode.
4. Temperature Adjustment Buttons (4 / Ⓥ / Ⓛ or Ⓣ / Ⓚ): Press the '+' or '-' buttons to increase or decrease the set temperature by 1°C (1°F). The adjustable range is 16°C (60°F) to 32°C (90°F). Pressing both '+' and '-' buttons simultaneously for at least 3 seconds toggles the display between Celsius and Fahrenheit.
5. Mode Button (5 / Ⓞ / Ⓑ): Cycles through operating modes. For heat-pump type: Auto -> Cool -> Dry -> Fan -> Heat. For cool-only units: Auto -> Cool -> Dry -> Fan. The corresponding mode indicator light illuminates.
6. Sleep Button (6 / Ⓛ / Ⓐ): Press to enter sleep mode. The unit will exit sleep mode after 8 hours of continuous operation and restore the previous status. The SLEEP function is not available in Fan and Dry modes.
7. Timer Button (7 / Ⓞ / Ⓞ): Press to activate the timer function. Use the temperature adjustment buttons to select the desired time. The timer function initiates automatically after 5 seconds of inactivity. If no operation occurs within 5 seconds or the set time is 0, the timer is cancelled. Pressing the timer button again displays the remaining time or cancels the function. Use to set an off timer when the unit is on, or an on timer when the unit is off.
8. Swing Button (8 / Ⓞ): Press to activate or deactivate the swing function. The swing indicator light will illuminate when active.
9. Connect Button (9 / Ⓚ): (Fig D only) Likely for smart connectivity features.
10. Scheduler Button (11): (Fig D only) For scheduling operations.

TEMP. indicator:

• In cooling or heating mode, the display shows the setting temperature when the $\vee(-/\bigcirc)$ or $\Lambda(+/\bigcirc)$ button is pressed.
• In Auto, Cool, and Heat modes, the TEMP.indicator displays the setting temperature.
• In Dry and Fan modes, the TEMP.indicator displays the room temperature.

Operation

Before Starting the Unit:

• Observe all governing codes and ordinances.
• Check the installation location for necessary requirements.
• The location should provide:
• A grounded electrical outlet nearby (power cord length is 4.3' / 131 cm).
• Free air movement in the room.
• A sufficiently large opening for the air conditioner (installation parts are supplied for double-hung windows).
• At least 23.6" (60 cm) clearance from walls and furniture. Cabinet louvers must not be obstructed. Do not place the unit in front of drapes or curtains.

Operating Modes:

• Cooling Operation Mode: Press MODE until the 'cool' indicator lights up. Set desired temperature using '+' and '-' buttons. Select fan speed using the FAN button.
• Drying Operation Mode: Press MODE until the 'dry' indicator lights up. The fan runs at a fixed low speed. Close windows and doors for best dehumidifying effect. Temperature and fan speed cannot be adjusted.
• Fan Operation Mode: Press MODE until the 'fan' indicator lights up. Select fan speed using the FAN button. The setting temperature cannot be adjusted.
• Heating Operation Mode (Cooling only models have no heating function): Press MODE until the 'heat' indicator lights up. Set desired temperature using '+' and '-' buttons. Select fan speed using the FAN button.

Auto-Restart Function:

• If power is interrupted, the unit restarts in its last used mode/settings upon power restoration. The compressor restarts after 4 minutes.
• To set: Press the SLEEP button 10 times within 5 seconds (buzzer sounds 4 times).
• To cancel: Press the SLEEP button 10 times within 5 seconds (buzzer sounds 2 times).

Accessories

The following parts are included:

• Adapter A, Exhaust duct, Adapter B (flat mouth), Window Slider Kit
• Type A Screws (#)
• Type B Screws (#)
• Security Bracket (#)
• Type A foam seal (adhesive) (#)
• Type B foam seal (non-adhesive) (#)
• Adapter B (round mouth) (#), Wall exhaust Adapter (#)
• Drain hose
• Remote controller and Battery
• Expansion screw sleeve (#), Type C Screws (#)

Note: Optional parts are marked with (#); some models may not include them.

[Image: Various accessories including adapters, ducts, screws, brackets, seals, remote control, and batteries.]

Installation

Drainage:

• Pump Drain Outlet: Remove the pump drain from the back, attach the drain hose, and place the other end in a drainage area. Ensure the hose is secure and free of kinks.
• Water Full Indicator (P1): If the bottom tray is full, the display shows "P1" and the WATER FULL indicator illuminates. Move the unit to a drain location, remove the bottom drain plug, and restart the machine until "P1" disappears. Reinstall the bottom drain plug before use.
• Continuous Drainage (Dehumidifying Mode): Remove the upper drain plug, attach the drain hose, and place the end in a drain. Cover the hole with the adapter cap when not in use.

[Image: Diagram showing correct and incorrect hose placement for pump drain.]

[Image: Diagram showing the bottom drain plug.]

Install the Exhaust Duct into the Wall:

1. Prepare a hole in the wall. Install the wall exhaust adapter using expansion screw sleeves and Type C screws.
2. Connect the exhaust duct to the wall exhaust adapter.
3. Carefully lower the window. Secure the vent panel with Type B screws.
4. Cut and insert Foam Seal B between the glass and window to prevent air and insect entry.
5. Install the security bracket using a Type B screw.

Note: The duct can be compressed to a minimum of 27 cm and extended to a maximum of 150 cm. Keep the duct length minimal for better efficiency. Avoid excessive stretching or bending of the duct.

[Image: Diagram illustrating wall installation with exhaust adapter and duct.]

[Image: Diagram showing correct and incorrect duct configurations.]

Install the Exhaust Duct into the Window:

1. Connect Adapter B (flat mouth) of the exhaust duct to the window.
2. Connect the exhaust duct to the Air outlet connector on the back of the unit using Adapter A.
3. Install the Window Slider Kit: Attach Foam Seal A to the window sash. Attach the Window Slider Kit to the window sash, adjusting its length (67.5 cm to 120 cm) by loosening and tightening Screw A.

[Image: Diagram showing window installation with exhaust duct and slider kit.]

[Image: Diagram showing foam seal placement on window sash.]

[Image: Diagram showing window slider kit installation and adjustment.]

Unit Placement:

• Install in a flat, open location with unobstructed air outlets.
• Maintain minimum clearance from walls (more than 50cm on sides, more than 60cm in front).
• Ensure the floor is level (maximum gradient of 10 degrees).
• The plug should be accessible after positioning.
• Do not use in confined spaces like laundry rooms.

[Image: Diagram showing recommended clearance around the unit.]

Duct Mount Instruction:

• The exhaust duct is required for cooling, heating, and drying modes; it is not needed for fan mode.
• The duct can be moderately compressed and tensed, but avoid arbitrary stretching and bending.
• The duct can be connected to windows or installed into walls using the provided accessories.
• Install Adapter A and Adapter B (flat or round mouth) into the exhaust duct as shown.

[Image: Diagrams showing how to attach adapters to the exhaust duct for window and wall installation.]

Maintenance

General Precautions:

• Shut down the unit and cut off power for at least 5 minutes before cleaning to avoid electric shock.
• Do not use gasoline, benzene, thinner, liquid insecticide, or other chemicals, as they can damage the unit or deform plastic parts.
• Never pour water directly onto the unit to clean it, as this can damage electrical components and insulation.

Cleaning the Unit:

Use a warm, damp towel to clean the exterior.

Cleaning the Air Filter:

1. Remove the air filter: Take out the upper and lower air filters. Refer to Fig. 1 or Fig. 2 for low air intake grille types. Remove any screws securing the grille if present.
2. Clean the air filter: Use a vacuum cleaner. For very dirty filters, wash them in warm water (below 40°C / 104°F) with mild detergent, then dry in a shaded area.
3. Reinstall the filter: Reverse the removal process. Replace the filter cover.

Note for long-term storage: If not using the unit for an extended period, pull out the rubber plug to drain any internal water.

[Image: Diagrams showing air filter removal.]

[Image: Diagrams showing filter cleaning methods: vacuuming and washing.]

[Image: Diagram showing how to drain the unit for storage.]

Troubleshooting

Try these solutions to avoid service calls.