MR COOL DIY E StarTM Series Mini Split Heat Pump Owner’s Manual

: June 12, 2024
: Mr Cool

Table of Contents

DIY E StarTM Series Mini Split Heat Pump
Product Information
Installation & Owner’s Manual
Contents
Safety Precautions

DIY E StarTM Series Mini Split Heat Pump

Product Information

The product is a cooling system that provides comfort and
temperature control in indoor spaces. It consists of an indoor unit
and an outdoor unit. The system operates based on manual
instructions and has safety precautions to ensure proper usage.

Installation & Owner’s Manual

The manual provides detailed information on installation,
operation, care, and maintenance of the product. It also includes
safety precautions to prevent damage, injury, or property damage.
The manual is subject to change, and the latest version can be
found at www.mrcool.com/documentation.

Safety Precautions: Warnings and cautions regarding proper
usage.
Parts Overview: Diagrams and information about the different
parts of the product.
Operating Instructions: Information on operating temperature
and manual operation.
Care and Maintenance: Guidelines for maintaining and handling
the product.
Indoor Unit Installation: Step-by-step instructions for
installing the indoor unit.
Outdoor Unit Installation: Step-by-step instructions for
installing the outdoor unit.
Refrigerant Piping Connections: Information on connecting the
refrigerant pipes.
Electrical Connections: Instructions for electrical
connections.
Electrical and Gas Leak Checks: Guidelines for checking
electrical and gas leaks.
Test Run: Instructions for testing the system.
Troubleshooting: Troubleshooting tips for common issues.

Safety Precautions

The safety precautions section highlights important instructions
and actions to be followed to prevent damage, injury, or property
damage. Two symbols are used throughout the manual:

WARNING: Ignoring instructions may cause death or serious
injury.
CAUTION: Ignoring instructions may cause bodily injury, damage
to the unit, or other surrounding property.

It is emphasized that handling materials containing refrigerants
under pressure can be dangerous and should be done with
caution.

Product Usage Instructions

Read the entire manual carefully before installation and keep
it for future reference.
Ensure you have the latest version of the manual by visiting
www.mrcool.com/documentation.
Follow the safety precautions mentioned in the manual to
prevent any damage or injury.
Familiarize yourself with the parts overview section to
understand the different components of the product.
Refer to the operating instructions section for information on
operating temperature and manual operation.
Follow the step-by-step instructions in the indoor unit
installation section to install the indoor unit properly.
Install the outdoor unit using the instructions provided in the
outdoor unit installation section.
Connect the refrigerant pipes according to the guidelines
mentioned in the refrigerant piping connections section.
Follow the electrical connection instructions carefully to
ensure proper installation.
Perform electrical and gas leak checks as described in the
corresponding section.
Conduct a test run of the system following the instructions
provided in the test run section.
If any issues arise, refer to the troubleshooting section for
assistance.

Always prioritize safety and consult a professional if you are
unsure about any step or encounter difficulties during installation
or operation.

Please read this manual carefully before installation and keep it for future reference.
Installation & Owner’s Manual
DIY® E StarTM Series
Due to updates and constantly improving performance, the information and instructions within this manual are subject to change without notice. Please visit www.mrcool.com/documentation to ensure you have the latest version of this manual. Version Date: 02-14-22

Contents
! Safety Precautions
Warnings …………………………………………………………………………………………………………………. 3 Cautions ………………………………………………………………………………………………………………….. 4
1 Parts Overview
Parts Diagram …………………………………………………………………………………………………………. 5 Display Window ………………………………………………………………………………………………………. 6 Accessories ………………………………………………………………………………………………………………….. 7
2 Operating Instructions
Operating Temperature …………………………………………………………………………………………… 9 Manual Operation ……………………………………………………………………………………………………. 9
3 Care and Maintenance

DISCLAIMER: You are assuming the risk by handling materials containing refrigerants under pressure, that if not handled properly, can cause bodily injury. If you do not feel comfortable conducting this installation process,

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Contents
4 Indoor Unit Installation ………..15
1. Selecting an installation location ………15
4. Prepare refrigerant piping ………………..18 5. Mount indoor unit …………………………….18

5 Outdoor Unit Installation …… 19
1. Selecting an installation location ……19 2. Install drain joint ……………………………20
.21

Refrigerant Piping Connections………………….23
1. Prepare Exterior Wall Hole ……………………………………….. 23 2. Unwind Quick Connect® Line Set to necessary length 23 3. Connect Line Set to Indoor Unit ………………………………… 24 4. Connect Line Set to Outdoor Unit ……………………………. 26 5. Opening Refrigerant Valves of Outdoor Unit …………….. 28 6. Connect drain pipe …………………………………………………… 29 7. Wrap Piping Connections ………………………………………….. 30
7 Electrical Connections ……………………………….32
8 Electrical and Gas Leak Checks…………………..34
9 Test Run……………………………………………………..35
10 Troubleshooting…………………………………………37
Pat. https://mrcool.com/mrcool-patents/
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Safety Precautions

!

Read Before Using
Incorrect usage may cause serious damage or injury. The symbols below are used throughout this manual to indicate instructions that should be followed closely or actions that should be avoided to prevent death, injury, and/or property dam. age.

This symbol indicates ignoring instructions may cause death or serious injury
WARNING

CAUTION

This symbol indicates ignoring instructions may cause bodily injury, damage to the unit, or other surrounding property.

This symbol indicates that you should NEVER perform the indicated action.

WARNING
DISCLAIMER: You are assuming the risk by handling materials containing refrigerants under pressure, that if not handled properly can cause bodily injury. If you do not feel comfortable conducting this installation process,

DO NOT
When connecting the refrigerant piping, DO NOT allow any other substances or gases enter the unit. The presence of other gasses or substances will lower the unit’s capacity, and may cause abnormally high pressure in the operation cycle. This could cause an explosion and/or injury. DO NOT
unit at all times.

4. Install the unit in a firm, stable location that can support the weight of the unit. If the installation location cannot support the weight of the unit, it could fall and cause serious injury and/or damage.
5. Manual.

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Safety Precautions

8. All wiring must be properly arranged to ensure that the control board cover can close properly. If the control board cover is not closed properly, it can lead to corrosion, which can cause the connection points on the terminal to overheat, which car result in fire and/or electrical shock.
9. If connecting power to fixed wiring, the following must be incorporated within it, in accordance with the wiring rules; an all-pole disconnection device (which has at least 3 mm of clearances in all poles), and have a leakage current that may exceed 10mA, the residual current device (RCD) having a rated residual operating current not exceeding 30mA, and disconnection all must be present.
11. This appliance is not inteded for use by individuals (including children) with reduced physical, sensory, or mental
capabilities. It is also not intended for use by individuals with a lack of experience or 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 at all time to ensure that they do not play with the appliance.

combustible materials. . DO NOT

DO NOT

DO NOT operate your air conditioner in a room where it could be exposed to water, such as a bathroom or laundry room. Exposure to excessive amounts of water may cause electrical components to short circuit. DO NOT DO NOT

Note about Flourinated Gasses:
1 2.
the unit itself. 3. 4. 5.

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Safety Precautions
Parts Overview

1

NOTE: The installation must be performed in accordance with the requirement of local and national standards. Both power cable and signal cable should be protected by the conduit.

Indoor Unit (Interior/Air Handler)

Electrical Access

Front Panel

Air inlet rear

Air Filter
Air inlet si e

Air outlet bottom

Wall Mounting Plate

Fresh Air Filter
Air inlet rear Electrical Access

Quick Connect® Line Set (refrigerant pipe)
Pat. https://mrcool.com/mrcool-patents/
Non-Adhesive U.V. Tape (wrap)

Air outlet
Outdoor Unit (Exterior/Condenser)
NOTE ON ILLUSTRATIONS Illustrations in this manual are for explanatory purposes. The actual shape of your unit may vary.

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Overview – Display

2

°
ECO

3 4
Fig. 1.2

Display (on front panel of indoor unit)
1. Digital Display:
Displays the Temperature Setting when the air conditioner is operational. Displays the Room Temperature when in FAN mode. Displays the self-diagnostic codes. Displays ” ON” for three seconds when the Timer is ON and/or Fresh, Swing, Turbo, or Silence feature is activated. Displays ” OF” for three seconds when the Timer is switched OFF . Displays ” OF” for three seconds when the Fresh, Swing, Turbo, or Silence feature is canceled. Displays ” dF” when Defrosting operation is active. Displays ” cF” when Anti-Cold Air feature is active in HEAT mode (when air temp is low). Displays ” SC” during Self Clean operation (if feature is available). Displays ” FP” when Freeze Protection is active, operating under 46.4 °F (8 °C) (if feature is available).
2. Units of Measurement:
Displays ” °C” for Celsius or, “°F ” for Fahrenheit. Default units are “°F” (Fahrenheit) and can be switched by simultaneously pressing and holding both the up and down buttons on the remote control.
According to the operation mode (heat/cool, etc.), the Units of Measurement will display in

· Under Cool or Dry mode, it always displays as cool colors (Blue). · Under Heat mode, it always displays as a warm color (Red).
3. Wireless Mode: Displays when the wireless control feature is activated. NOTE: A guide for using the infrared remote can be found in the “Remote Control User Manual” which is included in this literature package.
4. Energy Saving Mode: Displays when Energy Saving Feature is active. Not available on units not equipped with this feature.

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Accessories

The listing below shows the accessories and parts (these may vary depending on purchase & options). Use all of the installation parts and accessories to install the system. Improper installation may result in water leakage, electrical shock, fire, and/or equipment failure.
LOOKS LIKE…

Mounting plate

1

5

Mounting plate screw

5

Remote control

1

Fixing screw for remote ST2.9 x 10

2
Optional Parts 1

Dry battery AAA.LR03

2

1

Seal Drain joint Neoprene

1
1
1 (Only for use when elevated)
1 (Sealant for Wall Sleeve)

Note: Illustrations are for explanatory purposes only – The actual shape and size may vary.

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Accessories

Installation & Owner’s Manual
Remote Control Manual
MRCOOL® Mini-StatTM User Manual
MRCOOL® Mini-StatTM
Smart Controller Kit
Plastic Wall Sleeve
Sound Deadening Pads
Drain Pipe Cardboard Mounting Plate Template Quick Connect® Line Set* (refrigerant pipe)
Insulation Material

LOOKS LIKE…
Please read this manual carefully before installation and keep it for future reference.
Owner’s Manual
E-StarTM DIY Series
For more details visit www.MrCool.com Please read this manual carefully before installation and keep it for future reference.
Remote Control User Manual
For more details visit www.MrCool.com
MRCOOL Mini-Stat
User Manual

1
1
1 (in Mini StatTM Box)
1 (in Mini StatTM Box)
1 (w/ Manual in Controller Box)
1
2 1 16 ft (5 m) 1
1
2 (Apply to the quick connectors of the pipe)

Non-Adhesive U.V. Tape *Pat. https://mrcool.com/mrcool-patents/ mrcool.com

1 Page 8

Safety Precautions

Operating Instructions

2

Room Temperature
Outdoor Temperature
NOTE: 1.

Cooling Operation
62.6°F~89.6°F (17°C~32°C)
12K 5°F~109.4°F (-15°C~43°C)
18K-36K 5°F~122°F (-15°C~50°C)

Heating Operation Drying Operation

32°F~86°F (0°C~30°C)
12K -13°F~86°F (-25°C~30°C)
18K-36K -4°F~86°F (-20°C~30°C)

50°F~90°F (10°C~32°C)
32°F~122°F (0°C~50°C)

Manual Operation Units are equipped with a button to run emergency operation mode. This button is used for manual operation in case the remote control fails, or maintenance is necessary. This can be accessed by opening the front panel.
NOTE: The unit must be turned off before operating the manual control button. If the unit is operational, continue pressing the manual control button until the unit is off.

CAUTION
· This button is used for testing purposes only. Please do not use it unless necessary. ·To restore the remote control operation, use the remote control directly.

Manual Control Button (Forced cooling)
Fig 2.1

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Operating Instructions

· Adjustment of the vertical and horizontal louvers will change airflow direction of the indoor unit to prevent discomfort and/or uneven room temperatures.
·
·

Adjust Vertical Airflow (Up/Down) using Vertical Louver (Fig 2.2): This function is performed by using the remote control, while the unit is operating. The Vertical louver can move in small increments for each press, or continuously swing up and down automatically. Please refer to the “Remote Control User Manual” for further details.
Adjust Horizontal Airflow (Left/Right) using Horizontal Louver (Fig 2.3 & Fig 2.4) Move the deflector rod, located on the underside of the unit, by pushing the tab to manually adjust the airflow from side to side as desired.

Range
Horizontal Louver
Grill inside)
Fig. 2.3
Range

Vertical Louver Fig. 2.2
Horizontal Louver Fig. 2.4

CAUTION
DO NOT the blower and suction side. The high speed fan inside may cause injury.
DO NOT operate the unit for long periods of time in cooling or dehumidifying mode with the airflow direction set downward. This could cause condensation to form on the surface of the vertical louver and allow moisture to drop onto furnishings or the floor.
DO NOT move the vertical louver manually, as this cause it to become out of sync. If this occurs, follow these steps:
1. Turn off power to the unit 2. Remove wireless module from back of front
cover 3. Turn off power to the circuit at the breaker 4. Wait a few seconds and turn the power back on
at the breaker 5. Reinstall wireless module into front cover 6. Turn the power to the unit back on
NOTE: After a quick restart, the vertical louver may remain static for approximately 10 seconds.
NOTE: Open angle of the vertical louver should not be set too small, as it will restrict airflow and reduce COOLING and HEATING performance of the unit.

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SLEEP operation

Operating Instructions

Basic Operation Modes:

8 hours timer OFF

Auto Operation:

Set Temperature
hour hour SLEEP Operation While Cooling

SLEEP operation
Set Temperature

8 hours timer OFF

SLEEP Operation: hours before SLEEP DRYING Operation:
HEATING Operation:

LOW .

hour hour

SLEEP Operation While Heating

supplement heating with other appliances.

Optimal Operation

curtains while

heating also

·

helps keep the

heat in

·

Doors and windows should be kept closed

·
performance.
·
function.
·
the unit.
·

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Operating Instructions
Special Functions
Refrigerant Leakage Detection (optional):
Louver Angle Memory Function (optional):

Anti-Mildew Function (optional): When the unit is turned off, in COOL, DRY, or AUTO (cool) modes, it will continue to run for about 10 minutes with low fan airflow. This is to aid in drying any condensation that has formed inside the unit to prevent mildew growth. Do not restart the air conditioner until the unit is completely off. Optimal Operation:
Wireless Smart Control Function:

Clean Air Filter Reminder (optional):

LED button on

Replace Air Filter Reminder (optional):

LED button

Mute Function (optional):

Press the LED

LED

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Operating Instructions
Care and Maintenance

3

CAUTION
Power supply must be disconnected before attempting any kind of cleaning or service. Before performing maintenance, turn the power off to the unit and then disconnect the power to the circuit at the breaker. Failure to do this could cause electrical shock.
DO NOT use benzene, thinner, polishing powder, or similar solvents for cleaning. These may cause the plastic to crack and/or deform.
DO NOT clean the unit with excessive amounts of water.
DO NOT touch the metal parts of the unit when removing the filter. Injuries can occur when handling the sharp metal edges.
DO NOT use water to clean inside the air conditioner. Exposure to water can destroy the insulation, leading to possible electric shock.

DO NOT use a chemically treated cloth or duster to clean the unit. DO NOT touch air freshening (Plasma) filter for at least 10 minutes after turning off the unit.
DO NOT clean the unit with combustible cleaning agents. These could cause fire or deformation.
DO NOT wash air filter with water hotter than 104°F (40°C).
DO NOT expose the filter to direct sunlight, it may cause it to shrink. Allow it to dry in the shade.

1 2
Tab

Wipe the unit with a soft dry cloth. If the unit is very dirty, wipe it with a cloth soaked in warm water. DO NOT use bleach or abrasives.
NOTE: A clogged air filter can greatly reduce heating and cooling efficiency of this unit. It is recommended to clean the unit every 2 weeks.
1. Open the front by carefully lifting both ends at the same time. As you continue lifting, at a certain angle there will be an audible click and the lid will become self-supporting. Some models are equipped with suspension bars that are required to prop the lid open.
2. Use the filter tabs to lift filter slightly upward and then pull it towards you.

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Care and Maintenance

3

. 7.
lowering the bottom into place. 8.
Preparation for Extended non-Operation:

3. Turn off the unit. Then, turn off the power to the circuit at the breaker. The unit should be the only appliance on this circuit.
4. 5. The outdoor unit also requires periodic maintenance.
However, it is highly recommended you contact a qualified service professional to perform this. Please do not attempt to do this on your own.
Pre-Season Inspection:
1. 2. 3. 4. 5. Replace Batteries in Remote Control

4 Removal
5
6 Panel buckles

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Install
Page 14

Installation Summary – Indoor Unit
Indoor Unit Installation

4

Installation Instructions Indoor Unit
PRIOR TO INSTALLATION: Before installing the indoor unit, refer to the label on the product box to make sure that the model numbers of the indoor unit and the outdoor unit match. Step 1: Selecting an installation location
choose an appropriate location. The following
location for the unit. P following standards:
Good air circulation
Noise from the unit will not disturb other people
Strong enough to support the weight of the unit

DO NOT install unit in the following locations: Near any source of heat, steam, or combustible gas
or clothing
Near any obstacle that might block air circulation
Near a doorway or where outside air may blow directly on indoor unit
In a location subject to direct sunlight
NOTE ABOUT WALL HOLE:
If there is no fixed refrigerant piping: While choosing a location, be sure that you leave ample room for a wall hole (see the Drill Wall Hole for Connective Piping step on the following pages) for the signal cable and refrigerant piping, which connect the indoor and outdoor units. The default position for all piping is the right-hand side of the indoor unit (while facing the front of the unit). After the piping and signal wire are installed, use the provided neoprene (spray foam can be used instead, if you prefer) to pack the space left in hole, in order to seal it and make it airtight.

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Indoor Unit Installation

Refer to Fig. 4.2 below to ensure proper distance from walls, ceiling, and floor when mounting unit:
Minimum Ceiling Clearance
5.9 in (15 cm)

Fig. 4.1

Minimum Side Clearance
4.75 in (12 cm)
For Ceilings GREATER than 9 ft., recommended distance from floor
90.55 in (230 cm)
For Ceilings LESS than 9 ft., recommended distance from floor
78.55 in (200 cm)

Minimum Side Clearance
4.75 in (12 cm)
Fig. 4.2

2. Place the mounting plate against the wall in a location meets the guidelines in the Selecting an Installation Location step. Refer to the Mounting Plate Dimensions section for detailed information on mounting plate sizes.
NOTE A cardboard template of the mounting plate is included to be used as a more manageable way of determining where to mount the mounting plate and drill the wall hole. It can be placed against the wall in place of the actual mounting plate for the previous step (See Fig 4.1).
3. · the unit · plate
4. Secure the mounting plate to the wall with the
5. the wall.
NOTE FOR CONCRETE OR BRICK WALLS:
If the wall is made of brick, concrete, or a similar material, drill 0.2 in. diameter (5 mm diameter) holes in the wall and insert the sleeve anchors provided. Secure the mounting plate to the wall by tightening the screws directly into the anchors.

You must drill a hole in the wall for the refrigerant piping, drainage pipe, and signal cable to pass through in order to connect the indoor and outdoor units.
1. Determine the location of the wall hole based on the position of the mounting plate. Refer to the Mounting Plate Dimensions (See Fig 4.5) to assist you in determining the optimal position for the hole, based on the type of mounting plate provided with your unit.
2. Using a core drill, with a 3.54 in (90 mm) diameter, drill a hole in the wall at a slight downward angle, so that the indoor end of the hole is higher than the outdoor end of the hole, by approximately 0.2 in to 0.275 in (5 mm to 7 mm). This will ensure proper water drainage from the indoor unit (See Fig. 4.3).
3. Insert the protective wall sleeve through the hole of the inside wall, noting the amount it protrudes from the exterior wall. Then, trim the excess, with a utility knife or a saw, to make it flush with the exterior wall. This will protect the edges of the hole and help seal it when you finish the installation process (See Fig 4.4).
CAUTION
When drilling the wall hole, be sure to avoid wires, plumbing, nails, screws, and other sensitive components.

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Indoor Unit Installation

MOUNTING PLATE DIMENSIONS
In order to ensure that you have ample room to mount the indoor unit, the diagrams to the right
with the following dimensions: · Height & Width of mounting plate · Height & Width of indoor unit relative to plate · Recommended position of wall hole · Relative distances between screw/mounting
holes · Do not attempt a left rear wall hole.
Correct orientation of Mounting Plate

11.7 in (297 mm) 1.7 in (43 mm)

NOTE REGARDING WALL STUDS on studs.

marked “US” on the metal bracket.

7.55 in (192 mm)

16.8 in (426 mm) 9.15 in (232 mm)
5.05 in (128 mm)

1.7 in (43 mm)

Outline of indoor unit when mounted to plate

1.7 in (43 mm)

31.6 in (802 mm)
Series 12K Models

Right rear wall hole 3.5 in (90 mm) Diameter

8.6 in (219 mm)

21.77 in (553 mm) 11.8 in (300 mm) 5.9 in (151 mm)

2.1 in (53.5 mm)

0.6 in (15 mm)

13.2 in (335 mm) 1.7 in (43 mm) 0.6 in (15 mm)

NOTE: Use a level in order to ensure your mounting plate is mounted to the wall with the correct orientation shown above.

Correct Angle to Drill Wall Hole

Indoor

Wall Outdoor

0.2 – 0.3in (5 – 7 mm)
Drill used to create wall
hole
Fig. 4.3
Wall Hole Sleeve Installation

Outline of indoor unit when mounted to plate

1.8 in (47 mm)

42.5 in (1080 mm)
Series 18K & 24K Models

Right rear wall hole 3.5 in (90 mm) Diameter

Outline of indoor unit when mounted to plate

Series 36K Models
Fig. 4.5

Right rear wall hole 3.5 in (90 mm) Diameter

UNIT IS ADJUSTABLE

Keep in mind that the hooks on the mounting plate are smaller than the holes on the back of the unit. If you find that there is not enough room to connect embedded pipes to the indoor unit, it can be adjusted left or right by 1.25-1.95 in (30-50 mm), depending on the model.

(30-50 mm)

Fig. 4.4

Adjustment range of indoor unit to the left or right

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Indoor Unit Installation

Step 4: Prepare indoor unit refrigerant piping
The piping of the indoor unit is attached to the back of the unit towards the bottom. It will be covered with insulation, and there will also be a drain pipe with these. This piping will need to be bent and prepared before it can be fed through the wall hole.
NOTE: Refrigerant piping should exit the indoor unit from the right-hand side (Refer to Fig 4.6)
1. Based on the position of the wall hole, relative to
the mounting plate, determine the necessary angle the piping will need to be bent to pass through the wall hole when the unit is mounted to the bracket.
2. Grip the refrigerant piping at the base of the bend.
Then, slowly, and with even pressure, bend the piping away from the back of the unit roughly 90 degrees. The piping should be sticking straight out from behind the unit once completed (Refer to Fig 4.6).
CAUTION
Be extremely careful not to dent or damage the piping while bending it away from the unit, as this could negatively affect the performance.
Fig. 4.6
3. Now, you will need to lightly tape the refrigerant piping and drain pipe together in a bundle, using electrical tape, making sure that the drain pipe is at the bottom. DO NOT tape the ends of the piping (connectors). Refer to Fig 4.7 and the image below for the correct orientation of the piping when taping.

Step 5: Mount the Indoor Unit
In the following steps the indoor unit will now be mounted to the wall bracket and the piping and wires will be fed through the wall hole.
1. Double-check that the ends of the refrigerant
pipes are sealed (screw on caps are still in place) to prevent any dirt or foreign material from entering the pipes.
2. Feed the signal wire (should be protected by
conduit) through the wall hole.
3. Carefully lift the indoor air handler, and slowly
feed the taped bundle of refrigerant pipes and drain hose through the wall hole, as you position it to mount to the wall bracket.
NOTE: Positioning the air handler on to the wall bracket, while feeding the piping through the wall hole, might be difficult for a single person to manage. If so, it may be necessary to seek the assistance of another person for this step.
4. Slightly lean the top of the air handler toward
the wall and hook the top of the indoor unit on the upper hook of the wall mounting plate.
5. Check that the unit is hooked firmly on the
mounting plate by applying slight pressure to the left and right-hand sides of the unit. The unit should not jiggle or shift.
6. Using even pressure, push down on the
bottom half of the unit. Continue pushing down until the unit snaps onto the hooks along the bottom of the mounting plate.
7. Again, check that the unit is firmly mounted to
the wall bracket by applying slight pressure to the left and right-hand sides of the unit.

Refrigerant piping Tape

Drain hose

Fig. 4.7

DRAIN HOSE MUST BE ON BOTTOM The drain hose must be placed at the bottom of the bundle. If it is not, it could cause the drain pan to overflow, which could lead to fire or water damage.

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Page 18

Indoor Unit Installation
Outdoor Unit Installation

5

Minimum

in 79

front of in (200

cCthmlee)aurannitc: e

Minimum Clearance above unit: 24 in2(46i0nc(m60)cm)
above

Minimum Clearance between the back of the unit and wall:
Ground Installed: 12 in (30 cm)
Bracket Installed: 6 in (15 cm)

Minimum Clearance on the left side of unit: 12 in (30cm)
12in (30cm) on left
Fig. 5.1
Installation Instructions Outdoor Unit
Step 1: Selecting an installation location

2o4ntoMihnrniegi(n6htuih0tmncemiutr:m)ig2h4Ctliesniad(r6ea0noccfme )

choose an appropriate location. Use the following guidelines to help you select an appropriate location.

P following guidelines:
Meets all spatial requirements shown in )

DO NOT install unit in the following locations:
Near an obstacle that will block air inlets and outlets Near a public street, crowded areas, or where noise from the unit will disturb others

Good air circulation and ventilation

Near animals or plants that will be harmed by hot air discharge

the unit and will not cause vibration
Noise from the unit will not disturb others Protected from prolonged periods of exposure to direct sunlight or rain

Near any source of combustible gas In a location that is exposed to large amounts of dust In a location exposed to a excessive amounts of salty air In a location that exposes the unit to large amounts of forced water

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Outdoor Unit Installation

SPECIAL CONSIDERATIONS FOR EXTREME WEATHER
angle to the direction of the wind. If needed, build a barrier in front of the unit to protect it from extremely heavy winds. Ensure the wind barrier does not block
Fig. 5.2 and Fig. 5.3 below.
Strong wind

Strong wind

Fig. 5.2 W

If the drain joint comes with a rubber seal Fig. 1. 2.
the unit. 3.
facing the front of the unit. 4.
If the drain joint does not come with a rubber seal 1. 2.

Fig. 5.3

Strong wind

requently exposed to
Build a shelter above the unit to protect it from the rain or snow. Be careful not to

Base pan hole of outdoor unit Seal
Seal

Drain joint (only use if elevated)

(A)

(B)

Fig. 5.4

Step 2: Install drain joint bottom of the unit. NOTE: there are two

DRAINAGE IN COLD CLIMATES
In cold climates, make sure that the drain hose is as vertical as possible to ensure swift water drainage. If water drains too slowly, it

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TOP VIEW

Outdoor Unit Installation

A
Air Inlet

FRONT VIEW

Air Inlet

H

D

B

Air Outlet

W

Fig. 5.5
UNIT MOUNTING DIMENSIONS

Outdoor Unit Dimensions:
Inches (Millimeters)
Width (W) x Height (H) x Depth (D)

31.50 in x 21.81 in x 13.11 in (800 mm x 554 mm x 333 mm)

33.27 in x 27.64 in x 14.29 in (845 mm x 702 mm x 363 mm)

DIY-24-HP-C-230B

37.24 in (946 mm

x x

31.89 in 810 mm

x x

16.14 in 410 mm)

37.24 in x 31.89 in x 16.14 in DIY-36-HP-C-230B (946 mm x 810 mm x 410 mm)

sizes and the distance between their mounting feet. Prepare the installation base of the unit according to the dimensions in the table below, using the
illustrations of the unit above (Fig 5.5) as a
reference/guide to correspond with the table.

Mounting Dimensions:

Inches (Millimeters)

Width (A)

Depth (B)

20.24 in (514 mm)

13.39 in (340 mm)

21.26 in (540 mm)

13.80 in (350 mm)

26.5 in (673 mm)

15.87 in (403 mm)

26.5 in (673 mm)

15.87 in (403 mm)

If you are installing the outdoor unit on the ground, or a concrete mounting platform, use the following steps: 1.
chart and illustrations above. 2.
3.
4.
5. holes.

7. Put a washer on each of the expansion bolts, then reinstall the the nuts.
8.
WHEN DRILLING INTO CONCRETE, EYE PROTECTION IS RECOMMENDED AT ALL TIMES.

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Outdoor Unit Installation
If you are installing the unit on a wall-mounted bracket, follow these steps:
Before installing a wall-mounted unit, make sure that the wall is made of solid brick, concrete, or a similarly strong material. The wall must be able to support at least 4 times the weight of the unit. 1.
2. 3. 4.
5.

the

ATION OF WALLMOUNTED UNIT
If allowed, you can install the wall-mounted unit with rubber gaskets to reduce vibration and noise.

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Page 22

Refrigerant Piping Connection

Step 1: Prepare exterior wall hole
Before the refrigerant piping can be installed and connected to the indoor and outdoor units, some additional steps are required to prepare the exterior.
1. Install finishing ring/cap to exterior portion of the wall hole.

Step 2: Unwind Quick Connect® Line Set to necessary length
1. Use your hands to slowly unwind the copper piping of one end of the Quick Connect® Line Set. The end you unwind will connect to the indoor unit piping. Only unwind as much as necessary for your application, and allow any excess to remain coiled (Refer to Fig. 6.1).

2. Place your hand on the underside of the piping coming through the exterior wall hole (from indoor unit), close to the wall. With your other hand, using even pressure, carefully bend the piping downward toward the wall, being mindful not to damage or dent the piping in the process.
CAUTION
Be extremely careful not to dent or damage the piping while bending it down the exterior wall, as this could negatively affect the performance. 3. Pack the wall hole with the supplied Neoprene
(or Spray Foam can be used) to seal the hole, filling any space that was not taken up by the refrigerant piping and lines.

MINIMUM BEND RADIUS
When bending connective refrigerant piping, it needs to have a minimum bend radius of 4 inches (Refer to Fig 6.1).
CAUTION
If the pipe is repeatedly bent or extended, it will become hard and difficult to manipulate. Avoid bending or extending the pipe more than 3 times, or excessively, as it could break.

Carefully unroll to indoor handler connection

Radius

Keep excess coiled
Connect directly to exterior condensor

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Refrigerant Piping Connection

Step 3: Connect Line Set to Indoor Unit

Refrigerant Pipe Connectors (both ends):

3.1 Tools needed

NOTE: Depending on the capacity rating of your unit,

(12K, 18K, 24K, 36K) the wrench sizes needed will vary, refer

to the table below (the unit uses metric sizes, the standard

sizes listed are approximations). Based on the availability of

wrenches in some of the sizes needed, the recommended

method is to use crescent (adjustable-type) wrenches that

can be adjusted to fit the size each step requires.

. Opened-ended wrench sizes needed

(1x of each of these)

} 12K & 18K

24K & 36K

3/4″ / 19 mm 3/4″ / 19 mm

7/8″ / 22 mm 15/16″ / 24 mm

15/16″ / 24 mm 1″ / 26 mm

Or 2x Crescent (adjustable-type)
Wrenches

1″ / 26 mm 1-1/8″ / 29 mm

1-1/4″ / 31 mm
. 1x HVAC Torque Wrench (if available) . 1x Allen key, 5 mm . 1x Phillips-head screwdriver . 1x leak-detection spray or a soapy water solution
(liquid detergent/mix, applied by brush or spray bottle)

3.2 IMPORTANT INFORMATION
PLEASE READ FULLY BEFORE PROCEEDING TO NEXT STEP

DO NOT

Pat. https://mrcool.com/mrcool-patents/
about connecting the refrigerant line connectors
IMPORTANT:
The line sets are designed to only be installed once. The seal within the line set cannot be guaranteed if they are installed more than once. This will void the warranty. They also contain a compression fitting to seal and do not require a thread sealent (teflon tape, etc.). Using a sealent may actually cause the connection to leak over time.
3.3 Connecting the Quick Connect® Line Set to the piping from indoor unit 1. Do not remove the plastic seals of the piping coming
from the indoor unit, or the appropriate line set connector, until immediately before you connect them. The plastic seals on each of the connectors should be color-coded to match the seals of the corresponding pipes they are to be connected to. 2. Align the refrigerant pipes correctly, making sure the dimensions of the connecting refrigerant pipe match. Unscrew the seals and place the screw connector of the line set pipe just onto the threads of the piping from the indoor unit, and tighten the first few threads by hand.

Always wear work gloves and goggles and use caution when handling refrigerant. Please make sure that refrigerant is never allowed to enter the environment. Improper handling of refrigerant may be harmful to your health. DO NOT

· The screw connections may only be tightened using the appropriate open-ended or crescent (adjustable-type) wrench.

IMPORTANT:
Before you continue, it is essential that you read the following instructions fully and carefully.

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Page 24

Refrigerant Piping Connection

TORQUE REQUIREMENTS
1. 2.

NOTE: Torque ratings in the table below are to be used if you have access to an HVAC torque wrench. These are available for purchase from online retailers. However, it is possible to complete installation of refrigerant line sets with conventional open-ended/crescent wrenches. It is imperative, however, that you not overtighten the connector, and that once the lines have been fully connected, you follow the steps to check for leaks. If you do not feel comfortable attempting this, please contact a qualified HVAC technician.

3. Using the image below as a guide, and the steps outlined in this paragraph, you will now tighten the nuts of the screw connectors of the Quick Connect® Line Set to the indoor unit. Using two appropriate sized open-ended wrenches (depending on the dimensions of the connector) or adjustable crescent wrenches, place one of the wrenches on the nut marked “1”, and the other wrench on the nut marked “2,” as shown in the image below. Now, turn the wrench marked “2” in the direction of the rotational arrows, as shown, while holding the other wrench in place. Continue to tighten the connector until snug. NOTE: work quickly and make sure the screw connectors do not become crooked as you tighten them. If an HVAC torque wrench is available: Once the connector is snug, using the torque wrench, tighten the connector to the specified torque rating, listed in the table above (based on the pipe size).
If an HVAC torque wrench is NOT available: Using the two wrenches you used to tighten the connector, once the connector is snug, turn the wrench slightly beyond that point to torque the connector, but do not overtighten it. 4. Repeat the same process for the second line.

Stamp

Outer Pipe Diameter inch (millimeter)
in
in
in
in

Maximum lb·ft (N·m)
N·m N·m
N·m N·m

1 2

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CAUTION

Refrigerant Piping Connection

Step 4: Connect Line Set to the Outdoor Unit

1. shown in the illustration.
2. Do not remove the plastic seals from the outdoor unit piping connectors and corresponding refrigerant pipes (line set to be attached) until immediately before you connect them.

IMPORTANT: Before you continue, it is essential that you read the following instructions carefully. 4. Using the first image below as a guide, starting with
the bottom screw connector, you will now tighten the line set to the outdoor unit. Using two appropriate sized open-ended wrenches (depending on the dimensions of the connector), or adjustable crescent wrenches, place one of the wrenches on the nut marked “1”, and the other wrench on the nut marked “2,” Now, turn the wrench on nut “2” in the direction of the rotational arrow, while holding the other wrench in place, as seen in the first image below. Continue to tighten the connector until snug. NOTE: work quickly and make sure the screw connectors do not become crooked as you tighten them.
If an HVAC torque wrench is available: Once the connector is snug, using the torque wrench, tighten the connector to the specified torque rating, listed in the table on the next page (based on the pipe size).
If an HVAC torque wrench is NOT available: Using the two wrenches you used to tighten the connector, once the connector is snug, then turn the wrench slightly beyond that point to torque the connector, but do not overtighten it. 5. Repeat the same process for the top screw connector, using the second image below as a guide.

2 1

1

2

NOTE:
to connect the line set. 3. Align the refrigerant pipes so they line up with the corresponding valves and have enough slack. NOTE: The refrigerant pipes must be connected to the valves with as little stress as possible. Unscrew the plastic seals and place the screw connector of the refrigerant line just onto the threads of the outdoor unit, tightening the first few threads by hand.

IMPORTANT
The coupling of the outdoor unit uses tapping rings, if you disconnect and reconnect the refrigerant pipes, it could cause it to leak. This will also void the warranty.
NOTE: Keep excess refrigerant hose coiled. Wrap with protective tape and store behind the condenser in a horizontal position (flat with the ground).

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Page 26

Refrigerant Piping Connection

TORQUE REQUIREMENTS
Excessive force can break the nut or damage the refrigerant piping. You must not exceed torque requirements shown in the table below. 2.
3. versus a HVAC torque wrench) and that a socket style wrench cannot be used here.
NOTE: Torque ratings in the table below are to be used if you have access to an HVAC torque wrench. These are available for purchase from online retailers. However, it is possible to complete installation of refrigerant line sets with conventional open-ended/crescent wrenches. It is imperative, however, that you not overtighten the connector, and that once the lines have been fully connected, and the valves have been opened, you follow the steps to check the pipe connections for leaks (Refer to the Electrical & Gas Leak Checks section of this manual for more information) . If you do not feel comfortable attempting this, please contact a qualified HVAC technician.

Stamp

Outer Diameter of Pipe
inch (millimeter) in
in
in
in

lb·ft (N·m) N·m N·m N·m N·m

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Refrigerant Piping Connection

Step 5: Opening the refrigerant valves of the outdoor unit

1. Using the images below as a guide, remove the cover on the top valve, using a 19 mm open-ended wrench or a crescent (adjustable-type) wrench. Then, insert a 5 mm Allen key and open the valve by turning it counter-clockwise as far as it will go. DO NOT force it. The valve is now open. Screw the cover back onto the top valve and tighten it well to ensure that it is properly sealed.

2. Using the images below as a guide, repeat the same process for the bottom valve. Remove the cover on the bottom valve, using a 19 mm open-ended wrench or a crescent (adjustable-type) wrench. Then, insert a 5 mm Allen key and open the valve by turning it counter-clockwise as far as it will go. DO NOT force it. Screw the cover back onto the bottom valve and tighten it well to ensure that it is properly sealed.

CAUTION
If the valves are not fully opened, it could cause the system to malfunction and suffer damage.
3. After completing steps 1 and 2, you will now need to check all of the piping connections (at indoor unit and outdoor unit) for leaks. You can do this by using leak detection spray, or applying a soapy water solution (liquid detergent/water mixture) to the connection via a spray bottle or brush. If any bubbles begin to form, that indicates there is a leak, and the connection needs to be retightened. Tighten the connection and recheck it for leaks. Refer to Electrical and Gas Leaks Checks section of this manual for more information.
IMPORTANT: You will be asked to check for leaks at the piping connections multiple times throughout the following steps of the installation, because the pressures within the lines will change once the unit is turned on and this could reveal leaks not present during the initial check. These are imperative to make sure your connections are not allowing refrigerant to escape the system. When checking for leaks, if any bubbles form, it indicates the system has a leak and the screw connector needs to be retightened. For more information about checking for leaks, please refer to the Electrical and Gas Leak Checks section of the manual.

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Page 28

Refrigerant Piping Connection

Step 6: Connect Drain Pipe
In this step you will connect the drain hose extension to the drain hose exiting from the indoor unit piping
1. Securely connect the drain hose extension to the drain piping from the indoor unit.

Make sure there are NO kinks or dents in the hose to ensure proper drainage.

Fig. 6.2a

2. Using example Fig. 6.2a as a guide, make sure your drain pipe is run in a similar manner. The other examples in Fig 6.2 represent things you should avoid when installing your drain pipe.
3. Remove the air filter from the indoor unit and pour a small amount of water into the drain pan to ensure that the water exits the bottom of the unit and flows through the drain and drain pipe smoothly.
NOTE ON DRAIN HOSE PLACEMENT

NOT CORRECT KINKS in the drain hose will create water traps.
Fig. 6.2b
NOT CORRECT DENTS in the drain hose will create water traps.

Make sure to arrange the drain hose correctly according to Fig. 6.2a.
DO NOT kink the drain hose.
DO NOT create a water trap.
DO NOT put the end of drain hose in water or a container that will collect water.
ENSURE UNUSED DRAIN HOLE IS PLUGGED To prevent unwanted leaks, be sure that the factory installed hollow center rubber plug is installed in the unused drain hole.

Fig. 6.2c
NOT CORRECT DO NOT place the end
of the drain hose in water or in containers
that collect water. This will prevent proper drainage.

Fig. 6.2d

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Refrigerant Piping Connection
Step 7: Wrap piping connections In this step you will insulate the exposed line connections coming from the indoor air handler with the supplied sound deadening pads and insulation. Then wrap the line set from the outdoor unit to the wall hole with the supplied Non-Adhesive U.V. Tape.
IMPORTANT Do not complete these steps until all of the refrigerant piping connections have been checked for leaks.
1. Wrap the connectors at the indoor air handler tightly with the supplied sound deadening pads.

Wrapping the piping upward will prevent rain/moisture from seeping into the overlaps of the tape

2. Now, place the supplied insulation material over the connectors and exposed refrigrant piping
3. Now, starting at the outdoor condenser and working your way up to the wall hole, you will wrap the exposed line set, cables, and drain hose together tightly using the supplied Non-adhesive U.V. tape. The drain pipe will need to be at the bottom of the bundle (Refer to Fig. 6.3 and the image below). DO NOT wrap the end of the drain hose

Refrigerant piping

Drain hose

Non-Adhesive U.V. Tape

Fig. 6.3

If you would like the exterior piping on the side of your home to have a sleeker, more attractive look and add some extra protection in the process, you can purchase a MRCOOL LineGuard® Line Set Cover. This will encase your refrigerant piping and lines, protecting them from harsh weather conditions and sun exposure, which will extend the life of your system. These covers are available in various sizes to fit your particular application.

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Page 30

Refrigerant Piping Connection

Quick Connect® connections
Signal Cable
wrap the Quick Connect® connections with the black sound deadening pads.

wrap piping upward to the exterior wall hole
Drainage Pipe Refrigerant Piping
Quick Connect® Line Set (refrigerant pipe)
Pat. https://mrcool.com/mrcool-patents/
wrap from bottom to top to ensure tape overlap, as it will shed water
coil then wrap bundled excess
Fig. 6.3

Outdoor Unit (Exterior / Condenser)
BEFORE PERFORMING ELECTRICAL WORK, READ THESE REGULATIONS
1. All wiring must comply with local and national electrical codes. 2. All electrical connections must be made according to the Electrical Connection Diagram located on
the panels of both the indoor and outdoor units. 3. If there is a serious safety issue with the power supply, stop work immediately. Explain your
to the client, and refuse to install the unit until the safety issue is properly resolved. 4.
5. 6.
7. Do not connect another appliance to the same circuit as the unit. 8. Make sure to properly ground the unit. 9.
10. Do not allow wires to touch or rest against the refrigerant tubing, compressor, or any other moving part within the unit.
11. combustible materials.

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Electrical Connections
Connect signal and power cables A comprehensive wiring diagram is printed on the inside of the wiring cover.

7

E

G

L

KN

general conventions.

below.

WIRE CONNECTING DIAGRAM (12K Unit Only)

OUTDOO UNIT TE MIN L
123 LN
Y/G

Fig. 7.1

OUTDOO UNIT TE MIN L
1 2 3 L1L2
Y/G

RED WHITE BLACK RED WHITE BLACK

1 23 LN
TO INDOO UNIT 115 POWER SUPPLY

1 2 3 L1 L2
TO INDOO UNIT 208/ 230 POWER SUPPLY

WIRES AND TERMINALS ARE NUMBERED TO CORRESPOND WITH ONE ANOTHER AS SHOWN BELOW.

WIRES
This is dangerous and can cause the air conditioning unit to malfunction. Make sure you clearly distinguish the Live (“L”) Wires from the other wires.
All wiring must be performed in accordance with the wiring diagrams
the images shown here.

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Page 32

Electrical Connections

1. SELECT THE CORRECT CABLE
· See table below for gauge requirements

Minimum Wire Gauge for Power Cables

Appliance
ModelSeries Amps (A)

AWG

MOP MCA Min. Pref.

20 15

14

12

20 15

14

12

24K

25 18

14

12

36K

30 25

12

10

ALL WIRING MUST BE INSTALLED STRICTLY IN ACCORDANCE WITH THE WIRING DIAGRAM LOCATED AS SHOWN IN FIG 7.2.
2. 3.
4.

Cover

Outdoor Unit Wiring Diagram is located on
wire cover on

Fig. 7.2
NOTE ABOUT FUSE SPECIFICATIONS
designed with a fuse to provide overcurrent printed on the circuit board. EXAMPLE EXAMPLE Outdoor unit:

or metal parts.
screw it in place.

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Refrigerant Piping Connection

88

Manual. BEFORE TEST RUN

WARNING RISK OF ELECTRIC SHOCK
ALL WIRING MUST BE INSTALLED BY A LICENSED ELECTRICIAN AND COMPLY WITH LOCAL, STATE, AND NATIONAL ELECTRICAL CODES.

NOTE: DURING TEST RUN
IF ELECTRICAL LEAKAGE IS DETECTED NOTE:

There are two different methods to check for gaseous leaks.
Soap and Water Method Using a soft brush or spray bottle, apply a soapy water solution to all of the pipe connection points of the indoor and outdoor units, watching to see if any bubbles form. The presence of bubbles indicates there is a leak.
Leak Detector Method If using a leak detector, refer to the device’s operation/instruction manual for proper usage instructions.
AFTER PERFORMING GAS LEAK CHECKS
points DO NOT leak, replace the valve cover on the outside unit and wrap and insulate the piping connections of the indoor unit.

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Page 34

Test Run

Refrigerant Piping Connection

9

Before Test Run

Only perform test run after you have completed the following steps:

·

the electrical system is safe and operating

properly

·

not leaking
· pressure) valves are fully open

Test Run Instructions

You should perform the 30 minutes.

for at least

2. Press the

button on the remote

controller to turn it on.

3. Press the

button to scroll through the

· · 4.

Select lowest possible temperature Select highest possible temperature

No electrical leakage Unit is properly grounded

PASS/FAIL

properly covered

Indoor and outdoor units are solidly installed

Wall Penetration Sleeve is packed airtight

do not leak

Outdoor (2): Indoor (2):

Water drains properly from drain hose

insulated

function properly

function properly
Indoor unit louvers rotate properly
Indoor unit responds to remote control

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Test Run
DOUBLE-CHECK PIPE CONNECTIONS
During operation, the pressure of the refrigerant circuit/piping will increase. This may reveal leaks that were not present during your initial leak check. Take time during the Test
section for instructions.
5.

a. operating temperature.
b.
IF AMBIENT TEMPERATURE IS BELOW
If the ambient temperature is below 63°F (17°C), the remote controller cannot be used to turn on the COOL function. In this instance, you will need to use the MANUAL CONTROL BUTTON to test the COOL function. Follow the steps below to access this function:
1. Lift the front panel of the indoor unit, and continue to raise it until it clicks into place and becomes self-supporting.
2. The MANUAL CONTROL BUTTON is located on the right-hand side of the unit (Refer to Fig 9.1). Press it 2 times to select the COOL function.
3. Perform Test Run as normal.

Manual Control Button
Fig. 9.1
THANK YOU
Thank you for purchasing a MRCOOL ductless mini-split heating and air conditioning product.
MRCOOL is a young, family-owned company, so we are truly thankful you trusted us with your business. Should you ever need technical support, or just have questions about your MRCOOL product, or any of the other products we offer, please do not hesitate to call us at (270)-366-0457.
Also, if you can spare a few minutes today, and leave a review of your new MRCOOL® product on the partner site where you purchased it, it would really mean a lot to us. We are always looking for ways to improve, and real reviews, from actual customers like yourself, are vital and invaluable to our growing company.
Thank you for being a valued customer!

mrcool.com

Page 36

10

The following events may occur during normal operation, and may not indicate a malfunction.

Symptom

Cause

Operation is delayed after restart

The protection circuit will prevent the compressor from operating for roughly 3 minutes, after a sudden ON-OFF operation of the power supply, in order to prevent a blowout of the fuse.

Fan

appens in heating mode :

–prevents cold air blowing onto occupants when heating operation starts

–perform automatic defrosting operation

–perform low temperature heating operation

Heating operation stops suddenly and

T mode, the indoor unit temporarily stops for a maximum of 10 minutes to perform the automatic defrosting operation.

Mist coming out of

In

mode, a mist generated by condensation formed with sudden

cooling process may be emitted.

Mist may generate due to moisture from defrosting process when the air

Low volume sounds air conditioner
Dust from
Emits a peculiar odor

issing sound — during operation or immediately after stopping the air
Squeaking sound — normal expansion and contraction of plastic and metal parts caused by temperature change during the operation.
shing air — when louver resets its position.
used for a long time. smells generated from interior textile, furniture, or cigarette smoke
absorbed into the air conditioner may be emitted. If not the case, contact a local dealer or your installation contractor.

C anges to fan only

ure reaches the temperature setting of the remote control. If not the case, contact a local dealer or your installation contractor.

Operation is erratic, unpredictable or unresponsive

Interference from cell phone towers and remote boosters may cause the unit to malfunction.
Turn power off at the unit and at the circuit breaker, wait 10 seconds and turn power back on
Press the ON/O

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Symptom

Diagnostic
— Is there a power failure?

Unit will not operate

— Is the timer operating? batteries used in the remote controller exhausted? batteries used in the remote controller installed properly?

Poor cooling or

temperature and mode settings correct? windows or doors left opened?
— Is direct or strong sunlight shining into the room in cooling operation? re other heat generating devices (such as a computers operating),
or too many people in the room in cooling operation?

Indicator lamps
Errorcode appears
P1,P2,P3….. or F1, F2,F3…..

become lower.
— The unit may stop operation or continue to run in a safety condition (depending on the model). The fault may be recovered automatically by waiting for about 10 minutes. If this does not resolve the fault, disconnect the power and then reconnect it. If the problem still exists after the power has been restored, disconnect the power and contact the nearest customer service center.
NOTE: The wire colors of this series/model may differ from that of previous models, other series, and general wiring conventions. All wiring must be performed in accordance with the wiring diagrams, shown in Section 7 (Refer to Fig. 7.1), and associated images. Wires and terminals are numbered to match accordingly.

WARNING
· Signal/power cable is damaged or abnormally warm · Burning odor · Loud or abnormal sounds · A power fuse or circuit breaker trips frequently · Water or other objects fall into or out of the unit

DO NOT ATTEMPT TO CORRECT THESE ITEMS YOURSELF!
PROFESSIONAL IMMEDIATELY

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Page 38

Indoor Unit Error Display Olight

Xoff

flash

Operation LED Timer LED Display

LED STATUS

1 time 2 times 3 times 4 times 5 times
6 times 7 times 2 times
3 times
4 times
5 times 6 times 1 time 2 times 3 times 5 times

X

E0 Indoor unit EEPROM parameter error

X