M1WD Mini Split System
Specifications
- Model: M1WD***S6-1P, M33D***S6-1P
- Indoor Unit Types: 1-Way Cassette, 4-Way Cassette
- Operating Temperature Range: Refer to operating manual
- Energy Star Qualified: Yes
- Refrigerant Safety Group: A2L
Product Usage Instructions
Safety Information
Before using the mini-split system, ensure you read and
understand all safety information provided in the user manual.
Installation
Proper installation is crucial for optimal performance. Always
follow the installation instructions provided in the manual. If in
doubt, contact a professional installer.
Cleaning and Maintenance
Regular cleaning and maintenance are essential for the efficient
operation of the mini-split system. Follow the guidelines in the
manual for cleaning the air filter, resetting filter-cleaning
reminders, and periodic maintenance tasks.
Troubleshooting
If you encounter any issues with the product’s operation, refer
to the troubleshooting section in the manual. Only attempt simple
fixes if you are confident in doing so; otherwise, contact a
service center.
Frequently Asked Questions (FAQ)
Q: What should I do if the mini-split system is not cooling or
heating properly?
A: Check the air filters for dirt or blockages, ensure all vents
are open and unobstructed, and verify that the settings are correct
on the remote control.
Q: How often should I clean the air filter?
A: It is recommended to clean the air filter every 2-4 weeks
depending on usage.
Q: Can I install the mini-split system myself?
A: Installation should be performed by a qualified professional
to ensure safety and optimal performance.
Mini-Split User manual
M1WD***S6-1P, M33D***S6-1P
· Thank you for purchasing this Lennox Product. · Before operating this unit, please read this manual carefully and retain it for future reference.
Contents
Safety Information
3
Safety Information
3
At a Glance
13
Indoor Unit Overview
13
Operation Features
15
Operating temperature and humidity
15
Cleaning and Maintenance
17
Cleaning and Maintaining
17
Cleaning the indoor unit exterior · Cleaning the outdoor unit heat exchanger
17
Cleaning the air filter
18
Resetting the filter-cleaning reminder
22
Periodic maintenance
24
Troubleshooting
25
2 English
Safety Information
Safety Information
California Proposition 65 Warning (US)
WARNING: Cancer and Reproductive Harm –
www.P65Warnings.ca.gov.
Before using your new mini-split, please read this manual thoroughly to ensure that you know how to operate the extensive features and functions of your new appliance safely and efficiently. Because the following operating instructions cover various models, the characteristics of your mini-split may differ slightly from those described in this manual. If you have any questions, call your nearest contact center or find help and information online at www.lennox.com for homeowners and www.lennoxpros.com for dealer/contractor.
ENERGY STAR qualified model only Proper sizing and installation of equipment is critical to achieve optimal performance. Split system mini-splits and heat pumps (excluding ductless systems) must be matched with appropriate coil components to meet ENERGY STAR criteria. Ask your contractor for details or visit www.energystar.gov.
WARNING
Hazards or unsafe practices that may result in severe personal injury or death.
CAUTION
Hazards or unsafe practices that may result in minor personal injury or property damage.
English 3
Safety Information
Safety Information
Follow directions. Do NOT attempt. Make sure the machine is grounded to prevent electric shock. Cut off the power supply. Do NOT disassemble.
Symbol
Meaning
Flammable gas
Refrigerant Safety Group
A2L
Flammable materials Refrigerant safety group Read operating manual
Refer to operating manual
Read service manual
4 English
Safety Information
FOR INSTALLATION
WARNING
Use the power line with the power specifications of the product or higher and use the power line for this appliance only. In addition, do not use an extension line. · Extending the power line may result in electric shock or fire. · Do not use an electric transformer. This may result in electric
shock or fire. · If the voltage/frequency/rated current condition is different, it
may a cause a fire. The installation of this appliance must be performed by a qualified technician or service company. · Failing to do so may result in electric shock, fire, explosion,
problems with the product, or injury. Install a switch and a circuit breaker dedicated to the mini-split. · Failing to do so may result in electric shock or fire. Fix the outdoor unit firmly so that the electric part of the outdoor unit is not exposed. · Failing to do so may result in electric shock or fire. Do not install this appliance near a heater, or flammable material. Do not install this appliance in a humid, oily or dusty location, in a location exposed to direct sunlight and water (rain drops). Do not install this appliance in a location where gas may leak. · This may result in electric shock or fire. Never install the outdoor unit in a location such as on a high external wall where it could fall. · If the outdoor unit falls, it may result in injury, death or property
damage.
English 5
Safety Information
Safety Information
This appliance must be properly grounded. Do not ground the appliance to a gas pipe, plastic water pipe, or telephone line. · Failure to do so may result in electric shock, fire, an explosion, or
other problems with the product.
CAUTION
Install your appliance on a level and hard floor that can support its weight. · Failing to do so may result in abnormal vibrations, noise, or
problems with the product. Install the drain hose properly so that the water is drained correctly. · Failing to do so may result in water overflowing and property
damage. Avoid adding drains to waste pipes as odors may arise in the future. When installing the outdoor unit, make sure to connect the drain hose so that draining is performed correctly. · The water generated during the heating operation in the outdoor unit may overflow and result in property damage. In winter, if a block of ice falls, it may result in injury, death or property damage. The product shall be stored in a room with no ignition sources (e.g. open flames, gas appliance, electric heater, etc.). · Note that the refrigerant has no odor.
FOR POWER SUPPLY
WARNING
When the circuit breaker is damaged, contact your nearest service center.
6 English
Safety Information
Do not pull or excessively bend the power line. Do not twist or tie the power line. Do not hook the power line over a metal object, place a heavy object on the power line, insert the power line between objects, or push the power line into the space behind the appliance. · This may result in electric shock or fire.
CAUTION
When not using the mini-split for a long time or during a thunder/ lightning storm, cut the power at the circuit breaker. · Failing to do so may result in electric shock or fire.
FOR USING
WARNING
If the appliance is flooded, please contact your nearest service center. · Failing to do so may result in electric shock or fire. If the appliance generates a strange noise, a burning smell or smoke, cut off the power supply immediately and contact the nearest service center. · Failing to do so may result in electric shock or fire. In case of a malfunction, immediately stop operation of the minisplit and disconnect the entire power system. Then consult the authorized service personnel. In the event of a gas leak (such as propane gas, LP gas, etc.), ventilate immediately without touching the power line. Do not touch the appliance or power line. · Do not use a ventilating fan. · A spark may result in an explosion or fire.
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Safety Information
Safety Information
To reinstall the mini-split, please contact your nearest service center. · Failing to do so may result in problems with the product, water
leakage, electric shock, or fire. · A delivery service for the product is not provided. If you reinstall
the product in another location, additional construction expenses and an installation fee will be charged. · Especially, when you wish to install the product in an unusual location such as in an industrial area or near the seaside where it is exposed to salt in the air, please contact your nearest service center. Do not touch the circuit breaker with wet hands. · This may result in electric shock. Do not turn the mini-split off with the circuit breaker while it is operating. · Turning the mini-split off and then on again with the circuit breaker may cause a spark and result in electric shock or fire. After unpacking the mini-split, keep all packaging materials well out of the reach of children, as packaging materials can be dangerous to children. · If a child places a bag over its head, it may result in suffocation. Do not touch the front panel with your hands or fingers during the heating operation. · This may result in electric shock or burns. Do not insert your fingers or foreign substances into the outlet when the mini-split is operating or the front panel is closing. · Take special care that children do not injure themselves by inserting their fingers into the product.
8 English
Safety Information
Do not insert your fingers or foreign substances into the air inlet/ outlet of the mini-split. · Take special care that children do not injure themselves by
inserting their fingers into the product. Do not strike or pull the mini-split with excessive force. · This may result in fire, injury, or problems with the product. Do not place an object near the outdoor unit that allows children to climb onto the machine. · This may result in children seriously injuring themselves. Do not use this mini-split for long periods in badly ventilated locations or near infirm people. · Since this may be dangerous due to a lack of oxygen, open a
window at least once an hour. Do not use means to accelerate the defrost operation or to clean, other than those recommended by Lennox. Do not pierce or burn. Be aware that refrigerants may not contain an odor. If any foreign substance such as water has entered the appliance, cut off the power supply and contact the nearest service center. · Failing to do so may result in electric shock or fire. Do not attempt to repair, disassemble, or modify the appliance yourself. · Do not use any fuse (such as copper, steel wire, etc.)other than
the standard fuse. · Failing to do so may result in electric shock, fire, problems with
the product, or injury.
English 9
Safety Information
Safety Information
CAUTION
Do not place objects or devices under the indoor unit. · Water dripping from the indoor unit may result in fire or property
damage. Check that the installation frame of the outdoor unit is not broken at least once a year. · Failing to do so may result in injury, death or property damage. When the mini-split does not operate properly for cooling or heating, there is a possibility of refrigerant leakage. If any leakage, stop operation, ventilate the room, and consult your dealer to recharge the refrigerant. The refrigerant is not harmful. However, if it comes in contact with fire, it may generate harmful gases and there is a risk of fire. During the transportation of the indoor unit, the pipelines shall be covered with brackets for protection. Do not move the product by holding the refrigerant or drain pipe connections. · It may cause gas leakage. Do not install the product on a ship or a vehicle (such as a campervan). · Salt, vibration or other environmental factors may cause the
product to malfunction, electric shock or fire. Do not stand on top of the appliance or place objects (such as laundry, lighted candles, lighted cigarettes, dishes, chemicals, metal objects, etc.) on the appliance. · This may result in electric shock, fire, problems with the product,
or injury. Do not operate the appliance with wet hands. · This may result in electric shock.
10 English
Safety Information
Do not spray volatile material such as insecticide onto the surface of the appliance. · As well as being harmful to humans, it may also result in electric
shock, fire or problems with the product. Do not drink the water from the mini-split. · The water may be harmful to humans. Do not apply a strong impact to the remote controller and do not disassemble the remote controller. Do not touch the pipes connected to the product. · This may result in burns or injury. Do not cut or burn the refrigerant container or piping. Do not point the air direction to a fireplace or heater. Do not use this mini-split to preserve precision equipment, food, animals, plants or cosmetics, or for any other unusual purposes. · This may result in property damage. Avoid directly exposing humans, animals or plants to the air flow from the mini-split for long periods. · This may result in harm to humans, animals or plants. 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 the 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.
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Safety Information
Safety Information
FOR CLEANING
WARNING
Do not clean the appliance by spraying water directly onto it. Do not use benzene, thinner, alcohol or acetone to clean the appliance. · This may result in discoloration, deformation, damage, electric
shock or fire. Before cleaning or performing maintenance, cut off the power supply and wait until the fan stops. · Failing to do so may result in electric shock or fire.
CAUTION
Take care when cleaning the surface of the heat exchanger of the outdoor unit since it has sharp edges. · To avoid cutting your fingers, wear thick cotton gloves when
cleaning it. · This should be done by a qualified technician. Please contact
your installer or service center. Do not clean the inside of the mini-split by yourself. · For cleaning inside the appliance, contact your nearest service
center. · When cleaning the internal filter, refer to the descriptions in the
`Cleaning and Maintaining’ section. · Failure to do so may result in damage, electric shock or fire. · Make sure to prevent any injury from sharp edges of the surface
when handling the heat exchanger.
12 English
Indoor Unit Overview
The indoor unit and its display may look slightly different from the illustration shown below, depending on the model and the panel type. 1-Way Cassette
01
03
02
04
05
01 Display
02 Remote control sensor 03 Airflow blade 04 1-Way Cassette Panel
(You can use the WindFree Cooling function when the Cool, Dry, or Fan mode is running.) (Refer to the remote control manual for product operation) 05 Air intake
Indication
Function
Operation indicator · Heating and cooling
model: Operation(Blue) / Defrost(Yellow) · Cooling only model: Operation indicator
Timer indicator
Fan indicator
Filter cleaning indicator
At a Glance
English 13
Indoor Unit Overview
4-Way Cassette
At a Glance
02
03 04
01
01 Display
02 Air flow blade/Air outlet (inside) / 4-Way Cassette Panel (You can use the WindFree Cooling function when the Cool, Dry, or Fan mode is running.) (Refer to the remote control manual for product operation)
03 Air intake 04 Air filter (under the grille)
Indication
Function
On/Off operation indicator
Removing frost indicator
Timer indicator Filter cleaning indicator Remote control sensor
14 English
Operation Features
Operating temperature and humidity
Indoor unit / Outdoor unit: M**D0**S6-1P / MMLD***S6S-1P
MODEL
MODE
Cool M1WD009S6-1P
Heat M1WD012S6-1P
Dry
Cool M1WD018S6-1P
Heat M33D0**S6-1P
Dry
OPERATIONAL TEMPERATURE
INDOOR
OUTDOOR
64 to 90 (18 to 32)
0 to 122 (-18 to 50)
86 or less (30 or less)
-13 to 75 (-25 to 24)
64 to 90 (18 to 32)
0 to 122 (-18 to 50)
64 to 90 (18 to 32)
-4 to 122 (-20 to 50)
86 or less (30 or less)
-13 to 75 (-25 to 24)
64 to 90 (18 to 32)
-4 to 122 (-20 to 50)
Indoor unit / Outdoor unit: M33D0**S6-1P / MMPD0**S6S-1P
MODE Cool Heat Dry
OPERATIONAL TEMPERATURE
INDOOR
OUTDOOR
64 to 90 (18 to 32)
0 to 122 (-18 to 50)
86 or less (30 or less)
-4 to 75 (-20 to 24)
64 to 90 (18 to 32)
0 to 122 (-18 to 50)
INDOOR HUMIDITY 80% or less 80% or less 80% or less 80% or less
INDOOR HUMIDITY 80% or less 80% or less
At a Glance
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Operation Features
Indoor unit / Outdoor unit : M**D0**S6-1P / MM*D0**S6M-1P
MODE Cool Heat Dry
OPERATIONAL TEMPERATURE
INDOOR
OUTDOOR
64 to 90 (18 to 32)
86 or less (30 or less)
Depending on the outdoor unit specifications
64 to 90 (18 to 32)
INDOOR HUMIDITY 80% or less 80% or less
CAUTION
· If you use the mini-split at a relative humidity above 80%, it may cause a formation of condensation and a leakage of water on the floor.
· The rated heating capacity is based on an outdoor temperature of 47°F (8°C). If the outdoor temperature goes down below 32 (0), heating efficiencies may decrease depending on the temperature conditions.
· If the indoor unit is out of the operating temperature and humidity range, the safety device may operate and the mini-split may stop.
· If the indoor unit is installed in an IT room (for example, a computer room), a separate backup system must be installed, and the reliability of our product cannot be guaranteed at temperatures outside the operating temperature range.
At a Glance
16 English
Cleaning and Maintaining
Before cleaning the indoor unit, be sure to turn off the auxiliary power switch.
Cleaning the indoor unit exterior
1-Way Cassette 4-Way Cassette
Wipe the surface of the unit with a slightly wet or dry cloth when needed. Wipe off dirt of oddshaped areas by using a soft brush.
CAUTION
· Do not use alkaline detergent, sulphuric acid, hydrochloric acid, or organic solvents (such as thinner, kerosene, and acetone) to clean the surfaces.
· Do not attach any stickers on the surfaces because this may cause damage.
· When you clean the heat exchanger on the indoor unit, you need to disassemble the indoor unit. Therefore, you must contact the local service center for help.
Cleaning and Maintenance
Cleaning the outdoor unit heat exchanger
Spray water to clean the dust.
CAUTION
· The heat exchanger of the outdoor unit has sharp edges. Take care when cleaning its surface.
NOTE · If it is difficult to clean the heat exchanger
of the outdoor unit, contact the local service center.
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Cleaning and Maintaining
Cleaning the air filter
CAUTION
· Before cleaning the indoor unit, be sure to turn off the auxiliary power switch. · Be sure to hold the grille with a hand to prevent dropping from the opening of the front grille.
1-Way Cassette 1 Detaching the air filter
Press the Push signs on the front panel, then open the grille.
PUSH
Press the Push signs () on the air filter.
Grab the handle of the air filter and pull it out from the indoor unit with your hand.
Pull the air filter out of the indoor unit.
Cleaning and Maintenance
18 English
2 Cleaning the air filter 3 Reassembling the air filter
Clean the air filter with a vacuum cleaner or soft brush. If dust is too heavy, then rinse it with running water and dry it in a ventilated area.
CAUTION
· Do not scrub the air filter with a brush or other cleaning utensil. This may damage the filter.
NOTE · If the air filter dries in a humid area, it may
produce offensive odors. Clean it again and dry it in a well-ventilated area. · The cleaning period may differ depending on the usage and environmental conditions, so clean the air filter every week if the mini-split is in a dusty area. · You can request a filter cleaning service. Note that it is a charged service.
To assemble the air filter, proceed in reverse order of detaching.
CAUTION
· If the indoor unit is used without the air filter, it may be damaged due to dust.
Cleaning and Maintenance
English 19
Cleaning and Maintaining
4-Way Cassette 1 Detaching the air filter
Push down the hooks at each side of the front grille to open the grille.
Pull out the air filter from the indoor unit.
Cleaning and Maintenance
2 Cleaning the air filter 20 English
Clean the air filter with a vacuum cleaner or soft brush. If dust is too heavy, then rinse it with running water and dry it in a ventilated area.
CAUTION
· Do not scrub the air filter with a brush or other cleaning utensil. This may damage the filter.
NOTE
· If the air filter dries in a humid area, it may produce offensive odors. Clean it again and dry it in a well-ventilated area.
· The cleaning period may differ depending on the usage and environmental conditions, so clean the air filter every week if the indoor unit is in the dusty area.
· You can request a filter cleaning service. Note that it is a charged service.
3 Reassembling the air filter
CAUTION
· If the indoor unit is used without an air filter, the indoor unit may be damaged due to dust.
Cleaning and Maintenance
English 21
Cleaning and Maintaining
Resetting the filter-cleaning reminder
Programmable Wired Controller
Option
Filter Reset
After cleaning and reassembling the air filter, be sure to reset the filter-cleaning reminder as follows : · Indoor unit with the wired remote control:
a. Press the button to display the Option menu.
b. Press the button to select Filter Reset and press the button.
c. Press the button to select Indoor and press the button to display Filter using time.
d. Press the button to reset the air filter.
Filter Reset
Indoor
0000hr Left
Cleaning and Maintenance
Indoor
Filter using
Used time
time
Left time
0000hr
0000 hr
Press the OK button to reset filter.
22 English
Wireless Remote Control
· Indoor unit with the wireless remote control:
In operation
Select Settings.
Select Filter reset.
CAUTION
· The filter reset indicator blinks when the air filter should be cleaned.
· Although the filter cleaning indicator ( ) does not light, be sure to set the “Filter Reset” after cleaning the air filter.
· If the angle of the airflow blade is changed by opening the front grille for installation or maintenance of the indoor unit, be sure to turn off and then on the auxiliary switch before operating the indoor unit again. If not, the angle of the air flow blade may change and the blades may not be closed after turning off the indoor unit.
Cleaning and Maintenance
English 23
Cleaning and Maintaining
Periodic maintenance
Unit Indoor unit
Outdoor unit
Maintenance item
Interval
Requires qualified technicians
Clean the air filter.
At least once a month
Clean the condensate drain pan.
Once a year
Required
Clean the heat exchanger.
Once a year
Required
Clean the condensate drainpipe.
Once every 4 months Required
Replace R-32 detecting sensor Every 10 years
(M1WD009S6-1P, M1WD012S6-1P only)
Required
Clean the heat exchanger on the outside of the unit.
Once every 4 months
Required
Clean the heat exchanger on the inside of the unit.
Once a year
Required
Clean the electric components with jets of air.
Once a year
Required
Verify that all the electric components are firmly tightened.
Once a year
Required
Clean the fan.
Once a year
Required
Verify that the fan assemblies are firmly tightened.
Once a year
Required
Clean the condensate drain pan.
Once a year
Required
NOTE
· The checks and maintenance operations described above are essential to guarantee the efficiency of the mini-split. The frequency of these operations may vary depending on the characteristics of the area, the amount of dust, etc.
1 The above mentioned operations should be performed more frequently if the area of installation is very dusty.
2 These operations must always be performed by qualified personnel. For more detailed information, refer to the Installation Manual.
3 In some cases, if the period of use of the R-32 detecting sensor exceeds 5 years, “E695” is displayed on the wired remote control. The product does not work. Six months before the expiration of the period of use date, “E699” is displayed on the wired remote control, and the product works normally. If the period of use date exceeds 10 years, the wired remote control displays “E700”, and the product does not work. It must be replaced through Lennox before the expiration of the period of use date.
24 English
Cleaning and Maintenance
Troubleshooting
Refer to the following chart if the mini-split operates abnormally. This may save time and unnecessary expense.
Problem
The product does not work. Error E696
Solution
· This is intended to determine whether there is a leak or not, as R-32 refrigerant is sensed.
· The indoor unit determines again whether or not there is a refrigerant leak while operating for 2 minutes using Fan mode (specifically High speed). If there is no refrigerant leak, the indoor unit stops operating, the error is cleared and the product can operate normally.
· The R-32 sensor, embedded in the indoor unit, reacts not only to R-32 refrigerant but also to high-concentration chemicals (e.g. organic solvents, hair spray and paint). Do not use any high-concentration chemicals in the vicinity of the indoor unit, as these may cause false operation of the sensor.
The product does not work. Error E697
· This error occurs when indoor unit detect R-32 refrigerant leaks. · Ventilate the room for which the alarm was activated. · Contact the Samsung Electronics service center for assistance.
The product does not work.
Error E116, E695, E698, E699, E700
· This error occurs when the R-32 refrigerant sensor has a malfunction or the sensor’s life has expired.
· Display “E116” or “E698” when a sensor failure occurs.
· The R-32 sensor’s lifespan is 10 years. If the refrigerant leak sensor’s lifespan cannot be predicted, “E695” is displayed, and the product does not work. The wired remote control displays ‘E699’ 6 months before the sensor’s lifespan expires. After the sensor’s lifespan expires, the wired remote control displays ‘E700’, and the product does not work.
· Contact the Samsung Electronics service center for assistance.
The product does not work. Error E797
· This error occurs when another indoor unit that shares the outdoor unit detects the R-32 refrigerant.
· Ventilate the of Room for which the alarm was acticated. · Contact the Samsung Electronics service center for assistance.
The mini-split does not
· Because of the protective mechanism, the appliance does not start
operate immediately after it operating immediately to keep the unit from overloading. The mini-split
has been restarted.
will start in 3 minutes.
Cleaning and Maintenance
English 25
Cleaning and Maintaining
Problem
The mini-split does not operate at all.
Solution
· Check whether the power is turned on, and then operate the mini-split again.
· Check whether the auxiliary power switch (MCCB, ELB) is turned on. · If the auxiliary power switch (MCCB, ELB) is turned off, the mini-split does
not work although you press the (Power) button. · When you clean the mini-split or do not use it for an extended time, turn
off the auxiliary power switch (MCCB, ELB). · After the mini-split is not used for an extended period, be sure to turn on
the auxiliary power switch (MCCB, ELB) 6 hours before starting operation.
NOTE
· The auxiliary power switch (MCCB, ELB) is sold separately. · Make sure that auxiliary power switch (MCCB, ELB) is installed in the
distribution box inside the building. · If the mini-split is turned off by the Timed off function, turn on the mini-
split again by pressing the (Power) button.
The temperature does not change.
· Check whether the Fan mode is running. In the Fan mode, the mini-split controls the set temperature automatically, and you cannot change the set temperature.
· Check whether the outdoor unit is designed for cooling only. In this case,
Warm air does not come out warm air does not come out although you select the Heat mode.
of the mini-split.
· Check whether the remote control is designed only for cooling only. Use a
remote control that supports both cooling and heating.
The fan speed does not change.
· Check whether the Dry mode is running. In these modes, the mini-split controls the fan speed automatically, and you cannot change the fan speed.
· Ensure the remote control is charged.
The wireless remote control · Make sure that nothing is blocking the remote control sensor.
does not operate.
· Check whether any strong lighting sources are near the mini-split.
Strong light which comes from fluorescent bulbs or neon signs may
interfere with the remote control.
The wired remote control does not operate.
The mini-split is not turned on or off immediately with the wired remote control.
· Check whether the indicator is displayed at the bottom right of the remote control display. In this case, turn off both the mini-split and the auxiliary power switch, and then contact a service center.
· Check whether the wired remote control is set for group control. In this case, the mini-split connected to the wired remote control are turned on or off sequentially. This operation takes up to 32 seconds.
Cleaning and Maintenance
26 English
Problem The Timed on/off function does not operate. The indoor unit display blinks continuously. I want to get cooler air.
The air is not cool or warm enough.
The air is not cool or warm enough.
Solution
· Check whether you pressed the
(SET) button on the remote
control after setting the on/off time. Set the on/off time.
· Turn on the mini-split again by pressing the (Power) button. · Turn off and then turn on the auxiliary power switch, and then turn on
mini-split. · If the indoor unit display is still blinking, contact a service center.
· Operate the mini-split with an electric fan to save energy and enhance the cooling efficiency.
· In the Cool mode, cool air does not come out if the set temperature is higher than the current temperature. Remote control: Press the Temperature button repeatedly until the set temperature [minimum: 64°F (18°C)] is set to lower than the current temperature.
· In the Heat mode, warm air does not come out if the set temperature is lower than the current temperature. Remote control: Press the Temperature button repeatedly until the set temperature [maximum: 86°F (30°C)] is set to higher than the current temperature.
· Both cooling and heating do not operate in the Fan mode. Select the Cool, Heat, Auto, or Dry mode.
· Check whether the air filter is blocked with dirt. A dusty filter may decrease the cooling and heating efficiencies. Clean the air filter frequently.
· If a cover is on the outdoor unit or any obstacle is present near the outdoor unit, remove them.
· Install the outdoor unit in a well-ventilated place. Avoiding places exposed to direct sunlight or close to a heating appliance.
· Place a sunscreen over the outdoor unit to protect it from direct sunlight. · If the indoor unit is installed in a place exposed to direct sunlight, pull the
curtains on the windows.
· Close the windows and doors to maximize the cooling and heating efficiencies.
· If the Cool mode is stopped and then started immediately, cool air comes out after about 3 minutes to protect the compressor of the outdoor unit.
· When the Heat mode is started, warm air does not come out immediately to prevent cool air from coming out at the beginning.
· If the refrigerant pipe is too long, the cooling and heating efficiencies may be decreased. Avoid exceeding the maximum pipe length.
Cleaning and Maintenance
English 27
Cleaning and Maintaining
Problem
Solution
The mini-split makes strange noises.
· In certain conditions [especially, when the outdoor temperature is lower than 68°F (20°C)], a hissing, rumbling, or splashing sound may be heard while the refrigerant is circulating through the mini-split. This is a normal operation.
· When you press the (Power) button on the remote control, noise may be heard from the drain pump inside the mini-split. This noise is a normal sound.
· If the mini-split is running in a smoky area or if there is a smell entering
from outside, ventilate the room properly.
· If both indoor temperature and indoor humidity are high, operate the
Unpleasant odors permeate
mini-split in the Clean or Fan mode for 1 to 2 hours.
the room.
· If the mini-split has not been operated for an extended period of time,
clean the indoor unit and then operate the mini-split in the Fan mode for
3 to 4 hours to dry the inside of the indoor unit for removal of unpleasant odors.
· If the air filter blocked with dirt, clean the air filter.
Steam is produced on the indoor unit.
· In winter, if the indoor humidity is high, steam may be produced around the air outlet while the defrost function is running. This is a normal operation.
The outdoor unit fan continues to operate when the mini-split is turned off.
· When the mini-split is turned off, the outdoor unit fan may continue to operate to reduce noise of the refrigerant gas. This is a normal operation.
Water drops from the piping connections of the outdoor unit.
·
Condensation may develop due to the difference in temperature. This is a normal condition.
Steam is produced on the outdoor unit.
· In winter, when the mini-split runs in the Heat mode, the frost on the heat exchanger melts and steam may be produced. This is a normal operation, neither product malfunction nor a fire.
Cleaning and Maintenance
28 English
Memo
English 29
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Documents / Resources
 | LENNOX M1WD Mini Split System [pdf] User Manual M1WD S6-1P, M33D S6-1P, M1WD Mini Split System, M1WD, Mini Split System, Split System |