Comfort-Aire Century MARS

Safety Instructions

It is very important to read the safety instructions before installing and using the appliance. Improper installation due to failure to follow instructions can cause serious damage or injury. The severity of potential damage and injury is categorized as a WARNING or a CAUTION.

Symbol Meanings

⚠️ WARNING: This symbol indicates the risk of bodily injury or loss of life.

❗ CAUTION: This symbol indicates the possibility of material damage or serious consequences.

Warnings Related to Product Use

• Turn off the air conditioner and disconnect the power before cleaning, installing, or repairing it. Failure to do so may result in electric shock.
• If an abnormal situation occurs (e.g., a burning smell), immediately turn off the appliance and disconnect it from the power supply. Contact your dealer for instructions to avoid any risk of electrocution, fire, or injury.
• Do not insert fingers, sticks, or other objects into the air inlet or outlet. This could cause injury as the fan may operate at high speed.
• Do not use flammable aerosols such as hairspray or paint near the unit. This could cause fire or combustion.
• Do not operate the air conditioner near or around combustible gases. Emitted gases can accumulate around the unit and cause an explosion.
• Do not use the air conditioner in a humid room such as a bathroom or laundry room. Excessive exposure to water can cause short circuits in the electrical components.
• Do not expose your body directly to cold air for prolonged periods.
• Do not let children play with the air conditioner. Children must be supervised at all times around the unit.
• If the air conditioner is used with burners or other heating devices, ensure the room is well-ventilated to prevent oxygen deficiency.
• In certain operating environments, such as kitchens, server rooms, etc., the use of specially designed air conditioning modules is strongly advised.

Electrical Warnings

• Use only the specified wire. If the wire is damaged, it must be replaced by the manufacturer, its service agent, or any other qualified person to avoid risk.
• The product must be properly grounded at the time of installation to prevent the risk of electric shock.
• For all electrical work, follow all local and national wiring standards and regulations, as well as the Installation Manual. Connect cables firmly and secure them to prevent external forces from damaging the terminals. Incorrect electrical connections can overheat, cause fire, and result in electric shock. All electrical connections must be made according to the electrical connection diagram located on the panels of the indoor and outdoor units.
• All wiring must be properly routed to ensure the control board cover can be closed correctly. If the control board cover is not closed properly, it may eventually corrode and cause overheating of the terminal connection points, fire, or electric shock.
• Disconnection must be integrated into the fixed wiring in accordance with wiring rules.
• Do not share the electrical outlet with other appliances. Improper power supply can cause fire or electric shock.
• If the connection power to the fixed wiring, a double-pole disconnection device with at least 3 mm spacing in all poles, and a leakage current that may exceed 10 mA, a residual current device (RCD) with a rated residual operating current not exceeding 30 mA, must be integrated into the fixed wiring, in accordance with wiring rules.

Warnings Related to Cleaning and Maintenance

• Turn off the appliance and disconnect the electrical power before cleaning. Failure to comply may result in electric shock.
• Do not clean the air conditioner with excessive amounts of water.
• Do not clean the air conditioner with combustible cleaning products. Combustible cleaning products can cause fire or deformation.

ATTENTION

• Turn off the air conditioner and disconnect the power if you do not intend to use it for a prolonged period.
• Turn off and disconnect the unit during thunderstorms.
• Ensure that water condensation can drain freely from the appliance.
• Do not handle the air conditioner with wet hands. This could cause electric shock.
• Do not use the appliance for any purpose other than that for which it was designed.
• Do not climb on or place objects on the outdoor unit.
• Do not operate the air conditioner for extended periods with doors or windows open, or if the humidity level is very high.

WARNING CONCERNING REFRIGERANT USE

• Do not use tools to accelerate the defrosting process or for cleaning, other than those recommended by the manufacturer.
• The appliance must be stored in a room without continuously open ignition sources (e.g., open flames, gas-burning appliances, or operating electric heaters).
• Do not pierce or burn the refrigerant.
• Be aware that refrigerants may not have an odor.

Leak Detection System

The appliance is equipped with a leak detection system. The appliance must be powered on, except during maintenance. For units with a refrigerant sensor, when the sensor detects a refrigerant leak, the indoor unit will display an error code and emit an audible alarm. The outdoor unit's compressor will stop immediately, and the indoor fan will start operating. The lifespan of the refrigerant sensor is 15 years. The indoor unit displays the error code "FHCC" when the refrigerant sensor is not functioning correctly. The refrigerant sensor cannot be repaired and can only be replaced by the manufacturer. It must be replaced only with the sensor specified by the manufacturer (applicable to units with refrigerant sensors only).

Refrigerant Charge Quantity and Minimum Room Surface Area

The machine you purchased may be one of the types indicated in the table below. The indoor and outdoor units are designed to be used together. Please verify your purchased machine. The indoor unit must be installed at least 8.3 ft (2.3 m) from the floor. The room height cannot be less than 7.3 ft (2.2 m), and the minimum operating or storage room surface area must comply with the following table:

For units equipped with refrigerant sensors, the minimum indoor unit airflow is as follows when the unit detects a refrigerant leak:

Amin: Minimum required room surface area in ft²/m².

me: Actual refrigerant charge in the system in oz/kg.

MREL: Releaseable refrigerant charge in oz/kg (applicable to units with refrigerant sensors only).

hinst: Height of the appliance bottom from the room floor after installation.

WARNING: The minimum room surface area or conditioned room surface area is based on the releaseable charge and the total system refrigerant charge.

Installation

1. Installation (when refrigerant lines are permitted)

• Any person performing work on a refrigeration circuit or tasks within it must hold a valid certificate issued by an accredited assessment authority, attesting to their ability to safely handle refrigerants in accordance with an industry-recognized assessment specification.
• Maintenance and repairs requiring the assistance of other qualified persons must be carried out under the supervision of the person mastering the use of flammable refrigerants.
• Refrigerant line installation should be minimized.
• This piping must be protected against physical damage.
• Refrigerant lines must comply with national gas regulations.
• Mechanical connections must be accessible for maintenance.
• Ensure that foreign objects (oil, water, etc.) do not enter the piping. Furthermore, securely seal the opening by crimping, adhesive tape, etc., when storing the piping.
• The appliance must be stored in a well-ventilated area where the room surface area corresponds to the required area for the appliance's proper operation.
• Joints must be tested with detection equipment capable of detecting 5 g/year of refrigerant or better, with the equipment stopped and running, or under pressure for at least these stopped or operating conditions after installation. Detachable joints must NOT be used on the indoor unit (a brazed and welded joint may be used).
• In cases requiring mechanical ventilation, ventilation openings must be kept clear of any obstruction.

2. When a FLAMMABLE REFRIGERANT is used, installation space or ventilation requirements are determined according to:

• The mass charge (M) used in the appliance,
• The installation location,
• The type of ventilation for the location or appliance.
• Piping material, pipe routing, and installation must be protected against physical damage during service and comply with national and local codes and standards, such as RA 15, IAPMO Uniform Mechanical Code, ICC International Mechanical Code, or CSA B52. All field joints must be accessible for inspection before being covered or closed.
• Protective devices, piping, and fittings must be protected to the extent that:
• The possibility of mitigating adverse environmental effects, such as the risk of water retention and freezing in pipes or accumulation of dirt and debris;
• Refrigeration system piping must be designed and installed to minimize the probability of hydraulic shock that could damage the system;
• Steel pipes and components must be protected against corrosion by an anti-rust coating before any insulation is applied;
• Precautions must be taken to avoid excessive vibration or pulsation;
• The minimum room floor area must be stated as a table or a single figure without reference to a formula;
• After completing field piping for split systems, the installation piping must undergo a pressure test with an inert gas and then a vacuum test before refrigerant charging, in accordance with the following requirements:
• a. The minimum test pressure for the low side of the system must be the lower base pressure, and the minimum test pressure for the high side of the system must be the higher base pressure, unless the high side of the system cannot be isolated from the low side, in which case the entire system must be pressure tested up to the lower base pressure.
• b. The test pressure after removing the pressure source must be maintained for at least 1 hour without any drop in pressure indicated by the test gauge, with a gauge resolution not exceeding 5% of the test pressure.
• c. During the evacuation test, after reaching a specified vacuum level in the manual or less, the refrigeration system must be isolated from the vacuum pump, and the pressure must not exceed 1500 microns within 10 minutes. The vacuum pressure level must be specified in the manual and must be the locator of 500 microns or the required value to comply with national and local codes and standards, which may vary between residential, commercial, and industrial buildings.
• Refrigerant joints made during indoor installation must be subjected to a leak test according to the following requirements: The test method must have a sensitivity of 5 grams per year of refrigerant or better at a pressure of at least 0.25 times the maximum allowable pressure. No leaks must be detected.
• All maintenance must be performed only according to the manufacturer's recommendations.

3. Worker Qualification

All maintenance, servicing, and repair operations must be performed by qualified personnel. Any procedure affecting safety means must only be performed by competent persons who have undergone training and acquired skills, which should be documented by a certificate. Training for these procedures is provided by national training organizations or accredited manufacturers to teach relevant national competency standards as may be established in legislation. All training must comply with the requirements of ANNEX HH of UL 60335-2-40, 4th edition. Examples of such procedures include:

• Interrupting the refrigeration circuit;
• Opening sealed components;
• Opening ventilated enclosures.

Maintenance Information

1. Checks Before Starting Work

Before starting repairs on systems containing flammable refrigerants, safety checks are necessary to ensure the risk of ignition is minimal. To perform repairs on the refrigeration system, the following precautions must be observed before working on the system.

2. Work Procedure

Work must be carried out according to a controlled procedure to minimize the risks of flammable gas or vapor presence during the work.

3. General Work Area

All maintenance personnel and any other person working in the local area must be informed of the nature of the work in progress. Confined space work must be avoided.

4. Refrigerant Presence Check

Checks must be carried out in the work area with an appropriate refrigerant detector, before and during the work, to ensure the technician is aware of potentially flammable atmospheres. It is necessary to ensure that the leak detection equipment used is suitable for use with flammable refrigerants, e.g., it does not produce sparks, is sufficiently sealed, and is intrinsically safe.

5. Fire Extinguisher Presence

If hot work operations are to be performed on refrigeration equipment or any associated component, an adequate fire extinguisher must be readily available. A dry powder or CO2 extinguisher must be available near the charging area.

6. Absence of Ignition Sources

No person performing work in relation to a REFRIGERATION SYSTEM shall expose piping to any source of ignition in such a way that it could cause a risk of fire or explosion. All potential ignition sources, including cigarette smoke, must be kept sufficiently distant from the installation, repair, removal, and disposal area of the equipment, stages during which flammable refrigerant may potentially escape and settle in the surrounding space. Before starting work, the area around the equipment must be monitored to ensure there are no risks of flammability or ignition. "No Smoking" signs must be displayed.

7. Ventilated Area

It is necessary to ensure that the area is open to the air or sufficiently ventilated before commencing work on the system or performing hot work operations. Continuous ventilation must be ensured throughout the duration of the work. Ventilation must safely disperse any escaping refrigerant and expel it outdoors into the atmosphere.

8. Refrigerant Material Checks

When electrical components are to be replaced, they must be adapted and compatible with the appropriate recommendations. The manufacturer's maintenance and service guidelines must be followed under all circumstances. If in doubt, contact the manufacturer's technical service for assistance. The following checks must be applied to installations using FLAMMABLE REFRIGERANTS:

• The refrigerant charge is consistent with the room surface area where the refrigerant-containing elements are installed.
• The machinery and ventilation outlets are functioning correctly and are not obstructed.
• If an indirect refrigeration circuit is used, the presence of refrigerant in the secondary circuit must be verified.
• Equipment markings must remain visible and legible; illegible marks and signs must be corrected.
• Refrigeration pipes or components must be installed in a position where they are unlikely to be exposed to any substance that could corrode refrigerant-containing components, unless the components are made of naturally corrosion-resistant materials or are properly protected against such corrosion.

9. Electrical Equipment Checks

Repair and maintenance of components must include initial safety verification and component inspection procedures. If a defect exists that could compromise safety, no electrical power must be connected to the circuit until the problem has been resolved satisfactorily. If the defect cannot be resolved immediately, but the ongoing operation must continue, an appropriate temporary solution must be implemented. Any such situation must be reported to the equipment owner so that all parties are aware.

Initial safety checks must be performed to ensure that:

• Capacitors are discharged (this action must be performed safely to avoid potential sparks);
• Components and electrical wires are not energized during system charging, recovery, or purging;
• Ground continuity is guaranteed.

10. Sealed electrical components must be replaced if damaged.

11. Intrinsically safe components must be replaced if damaged.

12. Wiring

Verify that the wiring will not be exposed to wear, corrosion, excessive pressure, vibration, sharp edges, or any other detrimental environmental element. The check must also take into account the effects of cable aging or continuous vibrations from sources such as compressors or fans.

13. Flammable Refrigerant Detection

Potential ignition sources must not be used in any way when searching for or detecting refrigerant leaks. A halide lamp (or any other detector using an open flame) must not be used.

The following detection methods are considered acceptable for refrigerant systems. Electronic leak detectors can be used to detect refrigerant leaks, but in the case of FLAMMABLE REFRIGERANTS, the sensitivity may not be sufficient or may require recalibration. (Detection equipment must be calibrated in a non-refrigerant zone.) Ensure the detector is not a potential ignition source and is suitable for use in the presence of refrigerant. Leak detection material must be set to a percentage of the refrigerant's LFL (Lower Flammable Limit) and the leak detection material must be set to a percentage of the refrigerant's LII (Lower Ignition Limit) and calibrated according to the refrigerant used, and the appropriate gas percentage (25% maximum) must be confirmed.

Leak detection fluids are also suitable for use in the presence of most refrigerants, but the use of chlorinated products should be avoided, as chlorine can cause a reaction upon contact with the refrigerant and corrode copper tubing.

NOTE: Examples of leak detection fluids include:

• Bubble method,
• Fluorescent method agents.

If a leak is suspected, all open flames must be removed/extinguished. If a braze-requiring refrigerant spill is identified, all refrigerant must be removed from the system or isolated (using shut-off valves) in a part of the system located away from the leak. Refer to the following instructions for refrigerant removal.

14. Removal and Evacuation

When repairs are performed, or other actions are initiated in the refrigeration circuit, conventional procedures must be followed. However, for flammable refrigerants, it is important to follow best practices as flammability is a consideration. The following procedure must be followed:

• Safely remove refrigerant in accordance with local and national regulations;
• Evacuate;
• Purge the circuit with an inert gas (optional for A2L);
• Evacuation (optional for A2L);
• Rinse or continuously purge with inert gas when a flame is used to open the circuit;

Refrigerant charge must be recovered into suitable recovery cylinders if evacuation is not permitted by local and national codes. For appliances containing flammable refrigerants, the system must be purged with oil-free nitrogen to make the appliance safe for flammable refrigerants. This process may need to be repeated several times. Compressed air or oxygen must not be used to purge refrigerant systems.

For appliances containing flammable refrigerants, refrigerant purging must be carried out by breaking the vacuum in the system with oil-free nitrogen and continuing to fill until service pressure is reached, then venting to the atmosphere and finally re-applying (optional for A2L). This process must be repeated until there is no more refrigerant in the system (optional for A2L). When the last oil-free nitrogen charge is used, the system must return to atmospheric pressure for work to proceed. The suction pump outlet must not be near any potential ignition source, and ventilation must be available.

15. Charging Procedures

In addition to conventional charging procedures, the following requirements must be met:

• Work must be undertaken with appropriate tools only (if uncertain, consult the manufacturer of the tools to be used with flammable refrigerants).
• Ensure that different refrigerants are not contaminated when using charging equipment. Pipes or lines should be as short as possible to minimize the volume of refrigerant they contain.
• Cylinders must be kept upright.
• Ensure the refrigeration system is grounded before charging the system with refrigerants.
• Label the system when charging is complete (if not already done).
• Exercise extreme caution not to overfill the refrigeration system.
• System pressure must be tested with oil-free nitrogen before recharging. (OFN). System tightness must be tested at the end of charging, but before commissioning. A tightness test must be performed before leaving the premises.

16. Decommissioning

Before performing this procedure, it is essential that the technician is fully familiar with the equipment and all its specifics. The recommended best practice is to recover all refrigerants safely. Before starting the operation, an oil and refrigerant sample should be taken in case analysis is required before reuse of recovered refrigerant. It is important that electrical power is available before starting the operation.

• a. Familiarize yourself with the equipment and its operation.
• b. Electrically isolate the system.
• c. Before starting the procedure, ensure that:
• Mechanical handling equipment is available, if necessary, to handle refrigerant cylinders;
• All personal protective equipment is available and used correctly;
• The recovery process is supervised at all times by a competent person;
• Recovery equipment and cylinders comply with applicable standards.
• d. Evacuate the refrigeration system, if possible.
• e. If using a vacuum pump is impossible, perform manipulations to remove refrigerant from different parts of the system.
• f. Ensure the cylinder is placed on the steps before starting recovery.
• g. Start the recovery machine and proceed according to instructions.
• h. Do not overfill cylinders (not more than 80% of liquid charge volume).
• i. Do not exceed the cylinder's maximum service pressure, even temporarily.
• j. When cylinders have been correctly filled and the process is complete, ensure cylinders and equipment are promptly removed from the site and all isolation valves on the equipment are closed.
• k. Recovered refrigerant must not be charged into another refrigeration system before being cleaned and checked.

17. Labeling

The equipment must be labeled to indicate that it has been decommissioned and emptied of its refrigerant. The label must be dated and signed. For appliances containing FLAMMABLE REFRIGERANTS, ensure there are labels on the equipment indicating that the equipment contains FLAMMABLE REFRIGERANT.

18. Recovery

The recommended practice when performing refrigerant recovery, whether for maintenance or decommissioning, is to remove all refrigerants safely. When transferring refrigerant into cylinders, ensure only suitable refrigerant recovery cylinders are used. Ensure an adequate number of cylinders are available to contain the entire system charge. All bottles to be used are designated for refrigerant recovery and labeled for that refrigerant (e.g., cylinders specific for refrigerant recovery). Cylinders must be equipped with a pressure relief valve and shut-off valves in good working order. Empty recovery cylinders are evacuated and, if possible, cooled before starting the recovery process.

Recovery equipment must be in good condition and accompanied by an operating manual that is readily available and suitable for the recovery of flammable refrigerants. If in doubt, the manufacturer must be consulted. Additionally, a set of calibrated scales must be available and in good working order. Hoses must be equipped with leak-proof disconnect fittings.

Recovered refrigerant must be handled in accordance with local legislation in the appropriate recovery bottle, and the appropriate waste transfer note must be arranged. Do not mix refrigerants in recovery equipment, especially in cylinders.

If compressors or oil compressors are to be removed, ensure they have been drained to a sufficient level to guarantee that the oil no longer contains flammable refrigerant. The compressor body must not be heated by an open flame or other ignition sources to accelerate this process. When oil is drained from a system, the operation must be performed safely.

19. Transport, Marking, and Storage of Units

1. Transport of Equipment Containing Flammable Refrigerants

Compliance with transport regulations.

2. Marking of Material with Signs Conforming to Local Regulations.

3. Disposal of Material Using Flammable Refrigerants

In accordance with national regulations.

4. Storage of Material/Appliances

Material storage must be in accordance with the manufacturer's instructions.

5. Storage of Packaged Material (Not Sold)

Protective packaging for storage must be designed so that any mechanical damage to the material inside the packaging does not cause a leak in the refrigerant charge. The maximum number of appliances allowed to be stored together will be determined by local regulations.

Signification of Symbols Displayed on Indoor and Outdoor Units

• ⚠️ WARNING (A2L): This symbol indicates that this appliance uses a flammable refrigerant. If the refrigerant leaks and is exposed to an external ignition source, there is a risk of fire.
• ❗ CAUTION: This symbol indicates that it is recommended to read the user manual carefully.
• ❗ CAUTION: This symbol indicates that this appliance must be entrusted to maintenance personnel, in accordance with the installation manual.
• ❗ CAUTION (i): This symbol indicates that information such as the installation manual and the user manual is available.

Operating Instructions

REMARK:

• Different models have different front panels and display screens. Not all indicators described above are available for the air conditioner you purchased. Consult the display screen of the purchased unit.
• The illustrations in this manual are for explanation purposes only. The actual shape of your indoor unit may vary slightly. The actual shape of the appliance prevails.
• This display panel on the indoor unit can be used to operate the unit in case the remote control has been lost or is out of batteries.

Indoor Unit Display

Display Panel:

• Louvers (Ailette)
• Air Inlet (Entrée d'air)
• Angle Air Outlet (Sortie d'air d'angle)

DEL Display:

• Alarm Indicator (Indicateur d'alarme): Indicates alarm status.
• Timer Indicator (Minuterie Indicateur)
• Operation Indicator (Indicateur de fonctionnement)
• PRE-DEF Indicator (préchauffage/dégivrage): Indicates preheating/defrosting status.
• Wireless Control Functionality: When wireless control is active.

• FORCED COOL Mode: In FORCED COOL mode, the operation indicator flashes. The system will then switch to AUTO after cooling with a high fan speed for 30 minutes. The remote control will be deactivated during this operation.

• OFF Mode: When the display panel is off, the appliance is turned off, and the remote control is reactivated.

Other Functions

REMARK: Each time the air conditioner is turned on, a humming sound will be heard to indicate the product has been powered on normally. If there is no sound, the unit may be abnormal. Please power on again or check the circuit. Actual functions depend on the product purchased; please check the indoor display and your CA remote control. Refer to the <Remote Control Manual> for more features.

• Default Settings

When the air conditioner restarts after a power failure, it will default to factory settings (AUTO Mode, VENT AUTO, 24 °C (76 °F)). This may cause inconsistencies on the remote control and the unit panel. Use your remote control to update the status.

• Automatic Restart

In case of a power failure, the system will shut down immediately. When power is restored, the operation indicator on the indoor unit will flash. To restart the appliance, press the ON/OFF button on the wired remote control. If the system has an automatic restart function, the appliance will restart using the same settings.

• Three-Minute Protection Function

A protection function prevents the air conditioner from being activated for approximately 3 minutes when it restarts immediately after operation.

• Louver Angle Memory Function

For units with a louver angle memory function. When the appliance restarts after a power failure, the horizontal louver angle automatically returns to the previous position. The horizontal louver angle should not be too small, as condensation may form and drip into the unit. To reset the louver, press the manual button, which will reset the horizontal louver setting.

Heat Exchanger Dust Removal Function

This feature helps keep the outdoor coil cleaner and can extend the time between regular maintenance intervals depending on local conditions. When the unit is powered off, a 10-second delay occurs, then the outdoor fan runs in reverse for 70 seconds to blow off accumulated dust and debris.

• Sleep Function (Veille)

The Sleep function is used to reduce energy consumption during sleep (and does not require temperature settings to remain comfortable). This function can only be activated via the remote control. The Sleep (Night) function is not available in FAN or DRY modes. Press the SLEEP (Night) button when you go to bed. In COOL mode, the unit automatically increases the temperature by 1°C (2°F) after 1 hour, and by another 1°C (2°F) after another hour. In HEAT mode, the unit decreases the temperature by 1°C (2°F) after 1 hour, and by another 1°C (2°F) after another hour. The Sleep (Night) function will stop after 8 hours, and the system will continue to operate according to the last settings.

Diagram: Sleep Function (Nuit) showing temperature adjustments over time for COOL and HEAT modes.

Refrigerant Leak Detection

• The indoor unit automatically displays the following error codes when the system detects a refrigerant malfunction:
• EL0C (System lacks refrigerant),
• EH CI (Refrigerant sensor detects a leak),
• EHC2 (Refrigerant sensor status is out of range and a leak is detected),
• EHC3 (Receptor sensor status is out of range), or
• ECCI (Another indoor unit refrigerant sensor detects a leak (multizone)).
• When the error "EH CI" or "EHC2" occurs, a continuous beep will sound for 5 to 6 minutes before stopping. You can also press any button on the remote control to stop the buzzer.

Note: Error codes "EH CI", "EHC2", "EHC3", and "ECCI" are only applicable to units with a refrigerant sensor.

Maintenance and Care

ATTENTION: The cooling efficiency of your unit and your health would be compromised for the concealed air conditioner; ensure the filter is cleaned every two weeks.

• Always turn OFF the air conditioning system and disconnect the power before cleaning or maintenance.
• Use only a soft, dry cloth to clean the appliance. You may use a cloth dampened with warm water to clean it if the appliance is particularly dirty.
• Do not use chemical products or cloths treated with chemical products to clean the unit.
• Do not use benzene, paint thinner, shoe polish, or other solvents to clean the unit. They may crack or deform the plastic surface.
• Do not use water above 40 °C (104 °F) to clean the front panel. This may cause deformation or discoloration of the panel.

Cleaning Your Indoor Unit (Air Filter)

⚠️ WARNING: Removing and cleaning the filter can be dangerous. Removal and maintenance must be performed by an authorized technician.

Step 1: Remove the air filter.

• Open the cover and unscrew the screw.
• Press the button on both sides to remove the air inlet frame.

Diagram: Shows opening the cover, unscrewing, and pressing buttons to remove the air inlet frame.

Separate the frame from the filter assembly.

Remove the clean air filter. (Optional) Please note that the clean air filter cannot be washed with water. It is recommended to replace it regularly.

Step 2: Clean the air filter.

Clean the air filter by vacuuming the surface or washing it with lukewarm water and mild detergent.

Diagram: Shows cleaning the filter with a vacuum or washing it. If using water, the inlet side should face downwards away from the water stream. If using a vacuum, the inlet side should face the vacuum.

Step 3: Rinse and dry the filter.

Rinse the filter with clean water and let it air dry. DO NOT let the filter dry in direct sunlight.

Reinstall the filter.

❗ CAUTION

• Before changing the filter or cleaning the appliance, disconnect and turn off the power.
• When removing the filter, do not touch the metal parts of the unit.
• Sharp metal edges can cut you.
• Do not use water to clean the interior of the indoor element. This can destroy the insulation and cause electric shock.
• Do not expose the filter to direct sunlight during drying. This can cause the filter to shrink.
• All maintenance and cleaning of the outdoor unit must be performed by an authorized dealer or approved service provider.
• Any unit repair must be performed by an authorized dealer or approved service provider.

Air Conditioning Maintenance

Maintenance - Long Periods of Non-Use

If you plan not to use your air conditioner for an extended period, follow these steps:

• Clean all filters.
• Activate the FAN (Ventilation) function until the unit is completely dry.
• Turn off the appliance and disconnect the power.
• Remove the batteries from the remote control.
• Ensure nothing is blocking all air inlets and outlets.

Maintenance - Pre-Season Check

After long periods of non-use, or before periods of frequent use, follow these recommendations:

• Check if wires are damaged.
• Clean all filters.
• Verify for leaks.
• Ensure nothing is blocking all air inlets and outlets.

Troubleshooting

❗ CAUTION: If any of the following conditions occur, turn off your appliance immediately!

• The power cable is damaged or abnormally hot.
• You smell a burning odor.
• The appliance emits loud or abnormal sounds.
• A power fuse blows or the circuit breaker trips frequently.
• Water or other objects fall into or come out of the unit.

DO NOT TRY TO REPAIR THEM YOURSELF! CONTACT AN AUTHORIZED SERVICE PROVIDER IMMEDIATELY.

Common Problems

The following problems are not malfunctions and, in most cases, do not require any repair.

Poor Cooling Performance

Unit Does Not Function

Indicator Lights Continuously Blinking

The appliance may stop functioning or continue to operate safely. If the indicator lights continue to blink or error codes appear, wait approximately 10 minutes. The problem may resolve itself.

If not, turn off the power, then reconnect the power cord. Turn on the unit.

If the problem persists, turn off the power and contact the nearest customer service center.

REMARK: If your problem persists after performing the checks and diagnostics explained above, immediately turn off your appliance and contact an authorized after-sales service.

Design and specifications are subject to change without notice for product improvement. Consult the sales agency or manufacturer for details. All manual updates will be downloaded from the service website. Please check the latest version.

Limited Express Warranty

Congratulations on your purchase of your new HVAC equipment. It has been designed for a long service life and reliable operation, and is backed by one of the industry's strongest warranties. Your appliance is automatically eligible for the warranty coverage indicated below, provided you retain your proof of purchase (receipt) for the equipment and meet the warranty conditions.

TEN (10) YEAR LIMITED EXPRESS WARRANTY

MARS warrants that all parts, including the compressor of the VHP-SA series ductless mini-split, shall be free from defects in workmanship and materials for normal use and service for ten (10) years from the original customer's purchase date for the original installation. This limited express warranty applies only when the ductless mini-split is installed as a complete matched system: outdoor unit and indoor unit, and only when the system is installed according to MARS installation instructions and in compliance with all local, state, and national codes for normal use.

EXCEPTIONS

The limited express warranty does not cover routine maintenance. MARS recommends performing an inspection/maintenance at least once per season, and proof of maintenance must be kept. Furthermore, labor costs, transportation costs for replacement parts, refrigerant or filter replacement, any other service or repair are not covered by this limited warranty. It also does not cover any part or component of the system that is not supplied by MARS, regardless of the cause of failure of that portion or component.

CONDITIONS OF WARRANTY APPLICATION

• The appliance must be used according to the operating instructions provided by MARS. The appliance must not have been subjected to an accident, alteration, incorrect repair, neglect, or misuse, or an act of God (such as flooding).
• Installation must have been performed by a trained, licensed, or qualified HVAC dealer/contractor.
• Appliance performance must not have been compromised by any unauthorized product from MARS, or by any modification or adaptation of components.
• Serial numbers or the nameplate must not have been damaged or removed.
• Damage must not be the result of improper wiring or voltage conditions, or use under conditions of voltage sag or power outage.
• Airflow around any part of the appliance must not have been restricted. The unit must remain in its original installation.
• The appliance must not have been purchased over the Internet.

WARRANTY PERIOD AND REGISTRATION

The warranty begins on the date of purchase by the original consumer. The customer must keep a sales contract with a receipt as proof of the warranty period. Without this proof, the express warranty begins on the date of factory shipment.

REMEDIES PROVIDED BY THE LIMITED EXPRESS WARRANTY

The sole remedy available under the limited warranty is the replacement of the defective part. If replacement parts are required during the term of this warranty, MARS replacement parts must be used; no warranty on the replacement part(s) will extend the original applicable warranty of the unit. Ready for use, the owner is responsible for unit maintenance. Labor required for diagnosis and replacement of the defective part is not covered by this limited express warranty. If, for any reason, the replacement part or product is no longer available during the warranty period, MARS shall have the right to provide credit for the current suggested retail price of the part or product in lieu of providing repair or replacement.

LIMITATION OF LIABILITY

1. No other express or implied warranty applies. MARS does not warrant merchantability. We do not warrant that the appliance is suitable for any use or can be used in buildings or rooms of any size or condition, except as specifically stated in this document. No other warranty, express or implied, whose scope exceeds the conditions presented in this document, applies.
2. All implied warranties by law are limited to the seven-year parts warranty period. Your exclusive remedy is limited to the replacement of defective parts. We shall not be liable under any circumstances for consequential or incidental damages caused by a defect in this appliance.
3. This warranty gives you specific legal rights. You may also have other rights that vary from state to state. Some states do not allow limitations on the duration of an implied warranty or do not allow the exclusion or limitation of indirect or consequential damages, so the above limitations or exclusions may not apply to you.
4. No warranty is provided for units sold outside the continental United States and Canada. Your distributor or final seller may provide a warranty for units sold outside these areas.
5. MARS shall not be liable for damages if our warranty resolution performance is delayed by events beyond our control, including accidents, alterations, abuse, war, government restrictions, strikes, fire, flood, or other acts of God.

HOW TO OBTAIN WARRANTY SERVICE OR PARTS

If you have a warranty claim, promptly notify your installer. If the installer does not wish to address your claim, send a letter to MARS, 1900 Wellworth Ave., Jackson MI 49203. Attach an inspection report from your installer or service technician. Indicate the model number, serial number, and date of purchase.

Owner's responsibilities are outlined in the instruction manual. Read it carefully.

Please visit www.marsdelivers.com to register your new product.

RECORD THIS INFORMATION AS PROOF OF YOUR PURCHASE

Outdoor Unit: Model No. _______________ Serial No. _______________

Indoor Unit 1: Model No. _______________ Serial No. _______________

Indoor Unit 2: Model No. _______________ Serial No. _______________

Indoor Unit 3: Model No. _______________ Serial No. _______________

Indoor Unit 4: Model No. _______________ Serial No. _______________

Indoor Unit 5: Model No. _______________ Serial No. _______________

Date of Purchase: __________________________________________________________________________

VHP-SA_WARRANTY_3/2025

Due to continuous product improvements, technical specifications and dimensions are subject to change and correction without prior notice or obligation. Determination of the application and suitability for use of any product rests with the installer. Furthermore, the installer is responsible for verifying product dimensional data before commencing any installation preparation. Incentive and rebate programs have specific performance and product certification requirements. All products comply with regulations in effect at the date of manufacture; however, certifications are not necessarily granted for the life of a product. Therefore, it is the applicant's responsibility to determine if a specific model is eligible for these rebate and incentive programs.

1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com

9/2025