LENNOX Mini Split System

លក្ខណៈបច្ចេកទេស

• ម៉ាក៖ Lennox
• ប្រភេទឧបករណ៍៖ ប្រព័ន្ធបំបែកខ្នាតតូច
• ការធានារ៉ាប់រង៖ Varies based on model and installation date

ការណែនាំអំពីការប្រើប្រាស់ផលិតផល

Extended Limited Warranty Information:

Congratulations on your purchase of a Lennox mini-split system. Please ensure you register your equipment online at www.WarrantyYourWay.com to activate the Extended Limited Warranty. Failure to register may result in loss of coverage.

តម្រូវការសិទ្ធិទទួលបាន៖

1. The equipment must be a Lennox branded or Lennox Powered by \Samsung branded mini-split system with up to five indoor units.
2. The equipment must be installed in a Residential or Non-Residential Application.
3. The mini-split system must be installed per the manufacturer’s instructions by a licensed professional installer.
4. The system must be part of an AHRI-match and comply with regional standards.
5. This Extended Limited Warranty is granted to the original purchaser and is non-transferable.

Product Models and Warranty Coverage:

Refer to the user manual for specific model numbers and corresponding warranty coverage details, including parts and compressor warranties for both outdoor and indoor units.

សំណួរគេសួរញឹកញាប់

Q: Can the Extended Limited Warranty be transferred to a new owner?

A: No, the Extended Limited Warranty is granted to the original purchaser and is non-transferable.

Q: Is online registration required for all states/provinces?

A: Online registration is required for all states and provinces except California, Florida, Quebec, or where registration requirements are prohibited by law.

ទិន្នន័យខ្យល់

LENNOX EXTENDED ការធានាមានកំណត់
អនុវត្តនៅក្នុងសហរដ្ឋអាមេរិក និងកាណាដាតែប៉ុណ្ណោះ
(ONLINE REGISTRATION REQUIRED* at www.WarrantyYourWay.com, except in California, Florida, Quebec, or where registration requirements to effectuate warranties are prohibited by law.)

Congratulations on your purchase of a Lennox mini-split system. Please take a moment to read this document for important information about your Extended Limited Warranty and registering your equipment. By registering, you are reconfirming your agreement to the terms of the Basic Limited Warranty, as incorporated into this Extended Limited Warranty, including those pertaining to Dispute Resolution.
Lennox Industries Inc. (Lennox) provides certain components in its Lennox mini-split equipment with a basic five-year parts-only limited warranty (models listed on Lennox warranty certificate W900004-01). An extended parts-only limited warranty is available for certain components in the mini-split equipment, when consisting of a system. This Extended Limited Warranty is intended to supplement the basic five-year limited warranty with the following additional limited warranty coverage (based on model number):
Lennox Mini-Split1

ប្រភេទឧបករណ៍ លេខម៉ូដែល

ការធានាបន្ថែមមានកំណត់

Total Limited Warranty Coverage

អង្គភាពខាងក្រៅ អង្គភាពខាងក្នុង

3PB, 3PC, MLA, MLB, MPA, 7-year parts/5-year compressor MPB, MPC

3WMB, 3WMC, M22A, M33A, M33B, M33C, MCFA, MCFB, MFMA, MMA, MMDA, MMDB, MWMA, MWMB, MWMC

ផ្នែក 7 ឆ្នាំ។

12-year parts/12-year compressor 12-year parts

1Installation of the Lennox mini-split system must take place on or after March 1, 2017.
Lennox Powered by Samsung Mini-Splits

ប្រភេទឧបករណ៍ លេខម៉ូដែល

ការធានាបន្ថែមមានកំណត់

Total Limited Warranty Coverage

អង្គភាពខាងក្រៅ អង្គភាពខាងក្នុង

MWLD, MWPD, MMLD, MMPD, 3WPD
MDDD, MMDD, M22D, M33D, MFMD, MMD, M1WD, MWMD, 3WMD, MWZD

7-year parts/5-year compressor 12-year parts/12-year compressor

ផ្នែក 7 ឆ្នាំ។

ផ្នែក 12 ឆ្នាំ។

ប្រភេទឧបករណ៍ លេខម៉ូដែល

អង្គភាពខាងក្រៅ អង្គភាពខាងក្នុង

MWHD2 MWHD2

ការធានាបន្ថែមមានកំណត់

Total Limited Warranty Coverage

5-year parts/3-year compressor 10-year parts/10-year compressor

ផ្នែក 5 ឆ្នាំ។

ផ្នែក 10 ឆ្នាំ។

2Installation of the MWHD mini-split system must take place on or after November 11, 2025, to qualify for 10-year extended limited warranty.
*IMPORTANT: This Extended Limited Warranty requires proper online registration at www.WarrantyYourWay.com or by contacting Lennox Customer Support at www.lennox.com/help/contact-us/warranty (click on “E-mail our Contact Center”) or at 1-800-9-LENNOX within sixty (60) days of installation (for existing homes) or closing date (for new construction), except for consumers in California, Florida, Quebec, or where registration requirements to effectuate warranties are prohibited by law. Proof of purchase or closing date may be required. For consumers in California, Florida, Quebec, and where registration requirements to effectuate warranties are prohibited by law: (1) the Owner will automatically receive both the Basic Limited Warranty and this Extended Limited Warranty regardless of product registration; and (2) the failure to register equipment shall not diminish the Owner’s warranty coverage
LENNOX IS NOT RESPONSIBLE FOR FAILURE TO TIMELY, PROPERLY, AND ACCURATELY REGISTER, WHETHER BY THE OWNER OR THEIR INSTALLING SERVICE PROVIDER ACTING AS THEIR AGENT. FAILURE TO TIMELY, PROPERLY, AND ACCURATELY REGISTER (EXCEPT IN CALIFORNIA, FLORIDA, QUEBEC, OR WHERE REGISTRATION REQUIREMENTS TO EFFECTUATE WARRANTIES ARE PROHIBITED BY LAW), MAY RESULT IN LOSS OF COVERAGE.

ការតភ្ជាប់ស្ថានីយ

តម្រូវការសិទ្ធិទទួលបានឧបករណ៍
ឧបករណ៍គ្របដណ្តប់ត្រូវតែបំពេញតាមតម្រូវការដូចខាងក្រោមៈ
1 – The equipment must be a Lennox branded or Lennox Powered by Samsung branded mini-split system consisting of an outdoor unit and up to five (5) indoor units (models listed in warranty certificate W900004-02)
2 – The equipment must be installed in a “Residential Application” or a “Non-Residential Application” to be eligible. 3 – The equipment must not be subject to any exclusion set forth in the Basic Limited Warranty.
4 – The mini-split system must be installed per the manufacturer’s instructions by a licensed professional installer, or equivalent.
5 – The mini-split system must be part of an AHRI-match.
6 – The mini-split system must comply with regional standards.
7 – This Extended Limited Warranty is being granted to the original purchaser, who must occupy the residence or own the commercial building at the time of the warranty claim. Except as otherwise set forth in this Extended Limited Warranty, or prohibited by law, this Extended Limited Warranty is being extended to the original Owner and is not transferable.
លក្ខខណ្ឌ និងលក្ខខណ្ឌ
Unless modified herein, all terms and conditions set forth in the Basic Limited Warranty apply. These include, but are not limited to, component availability, excluded components, repairs, care of equipment, coverage, exclusions, warranty procedures and dispute resolution. Accessories and Controls are Excluded. This Extended Limited Warranty does not cover labor. NOTE – Registering your product does not guarantee the Basic Limited Warranty or this Extended Limited Warranty or the application thereof. If the registered product does not meet all qualifying factors and/or requirements for basic or extended warranty, or falls within one of the warranty limitations, the warranty will not apply to the equipment and/or your product regardless of the fact that the product is registered. NOTE – Lennox reserves the right to cancel this Extended Limited Warranty program at any time, without notice. Warranties properly registered at the time of program cancellation will continue to be honored.
នីតិវិធីចុះឈ្មោះ
គ្រឿងបរិក្ខា Lennox របស់អ្នកអាចត្រូវបានចុះឈ្មោះក្នុងវិធីណាមួយខាងក្រោម៖
(1) complete the on-line product registration at www.WarrantyYourWay.com , (2) contact Lennox Customer Support at www.lennox.com/help/contact-us/warranty (click on “E-mail our Contact Center”), or (3) contact Lennox Customer Support at 1-800-9-LENNOX. The following information will be required to register:
· Owner name · Address where equipment is installed · Equipment serial and model number · Installation or closing date
Much of this information will be on the invoice provided by the installing contractor. The unit model number and serial number are also provided on the sticker found on the front of the literature bag assembly. Please contact the installing contractor for assistance gathering this information. Any other method of registration is not valid and will result in no coverage under this Extended Limited Warranty, except where registration is not required (e.g., California, Florida and Quebec).

© 2025 Lennox Industries Inc.

P.O. Box 799900, Dallas, TX 75379-9900 Form EW900011-01 11/11/2025 Supersedes EW900011-01 7/1/2024

បង្ហាញ

Not Used Set Point or Room Temperature
របៀបប្រតិបត្តិការ
Figure 10. Remote Display
• Remote controller On. Icon displays to indicate that
the remote controller is on.
• Transmitting display. Icon blinks once when a signal is sent from the wireless remote controller.
• Operation mode. These icons show the current mode of operation. Press the mode button to scroll through the operation modes:
Auto → Cool → Dry → Heat → Fan.
• Setpoint or Room Temperature. Displays the setpoint temperature during normal operation. Displays the room temperature when in Follow me mode. Adjust the setpoint with up & down arrow buttons. No display when unit is in Fan mode.
• Remote controller On. Icon displays to indicate that
the remote controller is on.
• Transmitting display. Icon blinks once when a signal is sent from the wireless remote controller.
• Operation mode. These icons show the current mode of operation. Press the mode button to scroll through the operation modes: Auto → Cool → Dry → Heat → Fan.
• Setpoint or Room Temperature. Displays the setpoint temperature during normal operation. While in follow me mode the wireless remote will display the room \temperature and the wall unit will display the target set point temperature to be reached. Adjust the setpoint\ with up and down arrow buttons. No display when unit is in Fan mode.
• Timer ON/OFF. These icons light up to indicate that the indoor unit has a timed auto-start or auto-stop set up. Battery charge status. Icon displays charge status of wireless remote controller batteries.
• Sleep mode. Icon displays to indicate that sleep mode
operation is on.
• Follow me. This icon displays when the air\ temperature sensor in the wireless remote controller is the sensor being used by the indoor unit. When this function is off, the indoor unit uses a built-in sensor.
• Fan speed. Displays the current fan speed.
ការណែនាំអំពីប្រតិបត្តិការ
ថ្ម
1. Remove battery cover from back of remote.
2. Insert batteries into battery compartment.
3. Replace cover on controller.
NOTE: ON/OFF Timer, setpoint, fan speed and all other functions will have to be reset whenever the batteries are completely discharged or are replaced.

ព្រមាន
Do not mix old and new batteries or batteries of different types. Do not leave the batteries in the remote controller if the controller will not be used for an extended amount of time. Dispose of used batteries following local and state waste management standards. Select Fahrenheit or Celsius Press and hold the Up and Down buttons at the same time for three seconds to toggle between Fahrenheit and Celsius.
NOTE: To Set the Operation Mode
Press the Mode button to scroll through the mode selections. • Auto – System operates in cooling or heating mode as determined by the setpoint and the room temperature.
• Cool – System operates in cooling mode.
• Dry – System removes humidity according to preset
conditions (fan speed and setpoint temperature, not a
humidistat sensor). Cannot adjust fan speed.
• Heat – System operates in heating mode.
• Fan – This is for Fan only, no heating or cooling.
To set (or change) the room temperature setting
(setpoint)
Press the up and down arrow buttons to adjust the setpoint.
របៀបស្វ័យប្រវត្តិ
1. Press the Power button, an LED light on the indoor unit
ការបង្ហាញ។
2. Press the Mode button until the display shows AUTO.
3. Adjust temperature setpoint using up and down arrow
buttons (range 62°F – 86°F).
NOTE: Fan speed is auto and is not adjustable.
Cool/Heat/Fan mode
1. Press the Mode button to select Cool, Heat, or Fan.
2. Adjust the temperature setpoint using up and down arrow
buttons (range 62°F – 86°F).
3. Press the Fan Speed button to select Auto, Low, Med,
or High fan speed.
NOTE: Temperature set point is not displayed in Fan
របៀប។
របៀបស្ងួត
1. Press the Power button. An LED light on the indoor unit
ការបង្ហាញ។
2. ចុចប៊ូតុង របៀប ដើម្បីជ្រើសរើស ស្ងួត។
3. Adjust the temperature set point using up and down
ប៊ូតុងព្រួញ។
NOTE: Fan speed is not adjustable in dry mode. Using dry mode will over shoot the set point by 6 – 8 degrees. There is no humidity sensor. Timer Operation Timer ON and Timer OFF are used to turn on and turn off the indoor unit at selected intervals.
Timer ON Operation
1. Press the Timer ON button. The Timer ON icon, the last
auto-on time, and “h” will display.
2. Press the Timer ON button again to set the amount of time before the indoor unit begins operation. Each press will increase the time in half hour increments until 10 hours, then the increment becomes 1 hour.
Timer OFF Operation
1. Press the Timer OFF button. The Timer OFF icon, the
last auto-off time, and “h” will display.
2. Press the Timer OFF button again to set the amount of
time before the indoor unit stops operation. Each press will increase the time in half hour increments until 10 hours, then the increment becomes 1 hour. Modify Timer ON/OFF settings
1. Press either the Timer ON button or the Timer OFF button
to modify that setting.
2. Use the up arrow and down arrow buttons to change the timed operation intervals.
3. Set the timer to 0.0 to turn off timed operation.
6. Connection to Centralized Controller
6.1. Set Indoor Unit Address for Centralized Control (Used with VRF Only) All indoor units connected to a centralized controller must have a unique address. Use the S1 dip switch and the S2 dial switch to set the address for each indoor unit. The table below shows how to set the unique addresses. All indoor units are factory set to “0”. To change the address to “1”, move the dial switch to the 1 position, do not adjust the dip switches. To change the address to “35”, move dip
switch 1 to the UP position and move the dial switch to the
Figure 11. Dip Switches
Indoor Unit Address is 0 Both dip switch handles are DOWN, dial points to 0.Indoor Unit Address is 32 Dip switch 1 is UP and dip switch 2 is DOWN, dial points to 0. Switch location and color varies for each indoor unit. Two examples are shown above. Figure 12. Dip Switch Settings 6.2. Indoor Unit Connection Points for Centralized Controller Mini-split indoor units can be connected to a centralized controller (e.g. Lennox VRF Manager – LVM or Trane Tracer) or a BACnet or LonWorks gateway using the XYE terminals on the indoor unit main board.
To CCM
Comm.Bus
XY (E)
Y / G
Figure 13. Indoor Unit Connection Points (Typical Wiring Diagram)
Figure 14. Typical Indoor Unit Connection Points
6.3. Dry Mode Operation – Indoor Units
6.3.1. នីតិវិធី
1. ចុចប៊ូតុង MODE ដើម្បីជ្រើសរើសរបៀបស្ងួត។
2. Press the UP/ DOWN button to select the desired temperature. The temperature setting range is from 62°F to 86°F in one degree increments.
NOTE: The blower is preset at a low speed and cannot be changed therefore it will get cold and most likely will over shoot the temperature setting by 6-10 degrees depending on the room size or other various factors. Also the Follow Me mode does 13 not operate in this mode. The Follow Me mode is only available when a return air sensor is utilized. Typically in most cases the Follow Me mode will not be sufficient to remove excessive humidity.
NOTE: In addition, the outdoor units do not have a humidistat installed therefore they are unable to determine humidity levels. This product is not recommend as a main source for dehumidification. Note, this well over shoot the temperature by 6-8 degrees below what was set for dry mode. NOTE: Using this mode will over shoot the temp by 6-8\ degrees below what was set for dry mode. 6.3.2. Dry Mode Operation Sequence When in dry mode operation the unit is actually in cooling mode with a low speed blower operation. The compressor will stop when the room temperature is two degrees Celsius lower than the temperature setting. However there is a temperature compensation for cooling mode that is two degrees Celsius. So the unit will stop when the temperature is four degrees Celsius lower than the room temperature settings.
NOTE: Four degrees Celsius is equivalent to 8°F
ភាពខុសគ្នា។
6.4. Test Run – Indoor Units
អនុវត្តការធ្វើតេស្តបន្ទាប់ពីអ្នកបានបញ្ចប់ជំហានដូចខាងក្រោមៈ
• Electrical Safety Checks – Confirm that the unit’s electrical system is safe and operating properly
• Gas Leak Checks – Check all flare nut connections and
confirm that the system is not leaking
• Confirm that gas and liquid (high and low pressure) valves are fully open.
6.4.1. សាកល្បងការណែនាំអំពីការរត់
អ្នកគួរតែអនុវត្ត Test Run យ៉ាងហោចណាស់ 30 នាទី។
1. ភ្ជាប់ថាមពលទៅអង្គភាព។
2. Press the ON/OFF button on the remote controller to turn
វានៅលើ។
3. Press the mode button to scroll through the functions,
one at a time:
4. Let each function run for five minutes, and perform the
ការត្រួតពិនិត្យខាងក្រោម៖
6.4.2. Before Test Run
តារាងទី 3. សាកល្បងដំណើរការបញ្ជីត្រួតពិនិត្យ
Checks Pass Fail No electrical leakage Unit is properly grounded All electrical terminals properly covered Indoor and outdoor units are solidly installed All pipe connection points do not leak Water drains properly from drain hose \All piping is properly insulated \Unit performs COOL function properly Indoor unit louvers rotate properly Indoor unit responds to remote controller
6.5. Double-Check Pipe Connections
ក្នុងអំឡុងពេលប្រតិបត្តិការសម្ពាធនៃសៀគ្វីទូរទឹកកកនឹងកើនឡើង។ នេះអាចបង្ហាញពីការលេចធ្លាយដែលមិនមានវត្តមានក្នុងអំឡុងពេលត្រួតពិនិត្យការលេចធ្លាយដំបូងរបស់អ្នក។ ឆ្លៀតពេលកំឡុងពេលធ្វើតេស្តសាកល្បង ដើម្បីពិនិត្យពីរដងថាចំណុចតភ្ជាប់បំពង់ទូរទឹកកកទាំងអស់មិនមានលេចធ្លាយទេ។
• Using remote control, return unit to the normal operating temperature.
• Using insulation tape, wrap the indoor refrigerant pipe connections that you left uncovered during the indoor
unit installation process.
6.6. Ambient Temperature is Below 63°F
(17°C)
You can’t use the remote controller to turn on the COOL
function when the ambient temperature is below 17°C. In
this instance, you can use the MANUAL CONTROL button
to test the COOL function.
• Lift the front panel of the indoor unit, and raise it until it
ចុចនៅនឹងកន្លែង។
• The MANUAL CONTROL button is located on the righthand side of the unit. Press it one time to select the COOL function. First push is FC force cooling, which will display on the wall unit as FC which is used for high
speed charging 30 minute time.
• Perform Test Run as normal.
• Push the button one time is for FC force cooling, which will displayed on wall unit as FC. This is used for high speed charging 30 minute time.
• Push the button two times for cooling set 75ºF and unit is in auto mode. Temperature is set at 75°F with no changing of set temperature..
14
ការគ្រប់គ្រងដោយដៃ
ប៊ូតុង
Figure 15. Manual Button Location
15

Single Zone Outdoor Units

NOTE: Outdoor units can only be installed in an unenclosed outdoor environment. 7.1. Model Number Identification M H A 009 S 4 S – 1 P Series Type CLEARANCE NOTES FOR MULTIPLE UNITS: If the height of the wall (C) is less than or equal to the height of the smallest unit (A), the distance from the unit to the wall (B) must be a minimum of 10 inches\ (254 mm). If 1/2 the height of the unit (A) is less than the height of the wall (C), the distance from the unit to the wall (B) must be a minimum of 12 inches (305 mm).
If the height of the wall (C) is greater than the height of the unit (A), the distance from the unit to the wall (B) must be a minimum of 20 inches (508 mm).
NOTE: It is recommended that the single clearance be followed in a multi-unit applications. If not then these are the maximum and minimum clearances
you are allowed.
Figure 19. Multiple Outdoor Unit Clearances – Inches (mm)
Outside Unit BELOW Indoor Unit Outside Unit ABOVE Indoor Unit
Do not allow for excess length of line sets to be left rolled up as part of the
required distance, or in general. This will also cause additional performance issues.
សំខាន់
26
Table 4. Line Set Guide
Each system size has a line set length and vertical elevation parameters. System Size (KBtu) \Line Set Diameters (in.) Maximum Elevation Outdoor Unit BELOW Indoor Unit – Feet \(Meter) Maximum Elevation
អង្គភាពក្រៅ
ABOVE Indoor
Unit – Feet (Meter) Maximum Line Set Length – Feet (Meters) Additional Refrigerant for greater \than 25 Foot Line Set Lenght Liquid Gas 009 1/4 3/8 33 (10) 33 (10) 82 (25) For the additional charging, we recommend 0.161 oz. for 1/4” liquid line and 0.322 oz. for 3/8” liquid line
ក្នុងមួយជើង។

Gas Leak Check with Soap Water: Apply soap water or a liquid neutral detergent on the connections with a soft brush to check for leakage in the pipe connecting points. If bubbles emerge, the pipes are leaking. 12.2. Air and Moisture Air and moisture in the refrigerant system cause the following problems: • Increases in system pressure • Increases in operating current
• Decreases in cooling and heating efficiency
• Blocks in capillary tubing caused by moisture in the refrigerant circuit freezing • Corrosion of parts in the refrigerant system caused by water The indoor units and the pipes between indoor and outdoor units must be tested for leakages and evacuated to remove gas and moisture from the system. 12.3. Air Purging using a Vacuum Pump • Completely tighten the flare nuts on the indoor and outdoor units. Confirm that both the two-way and threeway valves are set to the closed position.
• Connect the charge hose with the push pin of the Handle Lo to the three-way valve gas service port. • Connect the charge hose of the Handle Hi to the vacuum pump.
• Fully open the Handle Lo of the manifold valve. • Turn on the vacuum pump to begin evacuation.
• Conduct a 30-minute evacuation. Check whether the compound meter indicates – 0.1Mpa(14.5Psi). If the meter does not indicate -0.1Mpa (14.5Psi) after 30 minutes has elapsed, continue evacuation for 20 more minutes. If the pressure does not reach – 0.1Mpa (14.5Psi) after 50 minutes has elapsed, check if there are any leaks. • Fully close the Handle Lo valve of the manifold valve and turn off the vacuum pump. After five minutes, confirm that the gauge needle is not moving. • Turn the flare nut on the three-way valve 45° counterclockwise for 6-7 seconds. Once gas begins to come out, tighten the flare nut. Make sure the pressure display on the pressure indicator is higher than atmospheric pressure. Then remove the charge hose from the three-way valve. • Fully open the two-way and three-way valves and securely tighten the cap on the three-way valve. 12.4. Adding Refrigerant if Pipe Length Exceeds Charge Less Pipe Length Connect the charge hose to the charging cylinder and open the two-way and three-way valves. With the charge hose you disconnected from the vacuum pump, connect it to the valve at the bottom of the cylinder. If the refrigerant is R-410A, place the cylinder bottom-up to ensure liquid charging is possible. • Purge the air from the charge hose. • Open the valve at the bottom of the cylinder and press the check valve on the charge set (be careful of the liquid refrigerant).}
• Place the charging cylinder onto the electronic scale and record the weight. • Turn on the air conditioner in cooling mode. • Open the valves (Low side) on the charge set. Charge the system with liquid refrigerant.

• When the electronic scale displays the proper weight (refer to the table), disconnect the charge hose from the three-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose.
• Mount the valve stem caps and the service port Use a torque wrench to tighten the service port cap to a torque of 18N.m (13.27 ft·lbs). • Be sure to check for gas leaks. 12.5. Add Refrigerant after Long-Term System Operation
• Connect the charge hose to the three-way service port and open the two-way and three-way valve. • Connect the charge hose to the valve at the bottom of the cylinder. If the refrigerant is R-410A, place the cylinder bottom-up to ensure liquid charge. • Purge the air from the charge hose.
• Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant).
• Place the charging cylinder onto the electronic scale and record the weight.
• Turn on the air conditioner in cooling mode. • Open the valves (Low side)on the charge set and charge the system with liquid refrigerant.
• When the electronic scale displays the proper weight (refer to the gauge and the pressure of the low side), disconnect the charge hose from the three-way valve’s service port immediately and turn off the air conditioner before disconnecting the hose.
• Mount the valve stem caps and the service port. Use torque wrench to tighten the service port cap to a torque of 18N.m(13.27 ft·lbs). 31 • Be sure to check for gas leaks. 12.6. Servicing Indoor Unit Refrigeration Circuit 12.6.1. Collecting Refrigerant into Outdoor Unit
• Confirm that both the two-way and three-way valves are set to the opened position • Remove the valve stem caps and confirm that the valve stems are in the opened position.
• Be sure to use a hexagonal wrench to operate the valve stems. • Connect the charge hose with the push pin of handle lo to the three-way valves gas service port.
• Air purging of the charge hose – Open the handle Lo valve of the manifold valve slightly to purge air from the charge hose for five seconds and then close it quickly.
• Set the two-way valve to the close position. • Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0.1MPa (14 psi). • Set the three-way valve to the closed position immediately
• Do this quickly so that the gauge ends up indicating 0.3 to 0.5Mpa (43 – 72 psi). • Disconnect the charge set, and tighten the two-way and three-way valve’s stem nuts.
• Use a torque wrench to tighten the three-way valves service port cap to a torque of 18N.m. • Be sure to check for gas leakage. 12.6.2. Air Purging with Vacuum Pump • Completely tighten the flare nuts of the indoor and outdoor units, confirm that both the two-way and threeway valves are set to the closed position. • Connect the charge hose with the push pin of handle lo to the three-way valves gas service port.
• Connect the charge hose of handle hi connection to the vacuum pump. • Fully open the handle Lo of the manifold valve. • Operate the vacuum pump to evacuate.
• Make evacuation for 30 minutes and check whether the compound meter indicates – 0.1Mpa (500 microns). If the meter does not indicate – 0.1Mpa (500 microbars) after pumping 30 minutes, it should be pumped 20 minutes more. If the pressure can’t achieve -0.1Mpa (500 microbars) after pumping 50 minutes, please check if there are some leakage points.
• Fully close the handle Lo valve of the manifold valve and stop the operation of the vacuum pump. Confirm that the gauge needle does not move (approximately five minutes after turning off the vacuum pump).
• Turn the flare nut of the three-way valves about 45° counterclockwise for six or seven seconds after the gas coming out, then tighten the flare nut again. Make sure the pressure display in the pressure indicator is a little higher than the atmosphere pressure. Then remove the charge hose from the three-way valve. • Fully open the two-way valve and three-way valve and securely tighten the cap of the three-way 12.7. Evacuation after Servicing the Outdoor Unit Refrigeration Circuit 12.7.1. Evacuation of the Complete Refrigeration Circuit, Indoor and Outdoor Unit • Confirm that both the two-way and three-way valves are set to the opened position.

• Connect the vacuum pump to three-way valve’s service port. • Evacuation for approximately one hour. Confirm that the compound meter indicates – 0.1Mpa (500 Microns / 29.9 in. hg). • Close the valve (Low side) on the charge set, turn off the vacuum pump, and confirm that the gauge needle does not move (approximately 5 minutes after turning off the vacuum pump).
• Disconnect the charge hose from the vacuum pump. 12.7.2. Refrigerant Charging • Connect the charge hose to the charging cylinder, open the two-way valve and the three-way valve.
• Connect the charge hose which you disconnected from the vacuum pump to the valve at the bottom of the cylinder. If the refrigerant is R-410A, make the cylinder bottom up to ensure liquid charge.
• Purge the air from the charge hose • Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air (be careful of the liquid refrigerant).
• Put the charging cylinder onto the electronic scale and record the weight. • Open the valves (Low side) on the charge set and charge the system with liquid refrigerant. If the system cannot be charge with the specified amount of refrigerant, or can be charged with a little at a time (approximately 150g each time) , operating the air conditioner in the cooling cycle; however, one time is not sufficient, wait approximately 1 minute and then repeat the procedure. • When the electronic scale displays the proper weight, disconnect the charge hose from the 3- way valve’s service port immediately • If the system has been charged with liquid refrigerant 32 while operating the air conditioner, turn off the air conditioner before disconnecting the hose.
• Mounted the valve stem caps and the service port. Use torque wrench to tighten the service port cap to a torque of 18N·m (13.27 ft·lbs).
• Always leak check after servicing the refrigerant system. There are one low-pressure centralized valve and one highpressure centralized valve, it will be more time saving when vacuum and recycle refrigerant. But refer to the previous instruction when vacuum and recycle refrigerant. 13. Electronic Function 13.1. Abbreviation
• T1: Indoor ambient temperature • T2: Middle indoor heat exchanger coil temperature • T3: Outdoor heat exchanger pipe temperature
• T4: Outdoor ambient temperature • T5: Compressor discharge temperature 13.2. Electric Control Working Environment. • Input voltagអ៊ី: 230V ។
• Input power frequency: 60Hz. • Indoor fan standard working amp.: <1A • Outdoor fan standard working amp.: <1.5A.
• Four-way valve standard amp.: <1A 14. Adding Refrigerant – Single-Zone Systems The outdoor unit is factory-charged with refrigerant. Calculate the additional refrigerant required according to the diameter and the length of the liquid pipe between the outdoor unit and indoor unit connections. Be sure to add the proper amount of additional refrigerant. Failure to do so may result in reduced performance. See “Table 4. Line Set Guide” on page 26 for how much refrigerant needs to be added based on pipe length. NOTE: Interconnecting pipe work between outdoor and indoor units must be 10 ft. or longer. NOTE: Do not remove refrigerant for line lengths less than 25 ft. R-410A is a blended refrigerant. If you must remove charge, it is necessary to remove the entire charge and weigh in the new charge. 15. Single-Zone Outdoor Unit LED Locations Single-zone outdoor units display flash codes on the main board. The main board is accessed through the top of the unit. Indoor units will display more detailed error codes. These outdoor units do not have a SW1 spot check push button switch. Diagnostic is performed through a series of blue, red and green LEDs. NOTE: The control on all single-zone outdoor units is mounted with all LEDs down and cannot be seen unless the control is removed. Figure 24. Typical Location of Outdoor Unit LEDs 33 16. Specifications and Operations Table 7. Electronic Functions Abbreviations CN8 Indoor ambient temperature CN9 Coil temperature of indoor heat exchanger T3 Pipe temperature of outdoor heat exchanger T4 Outdoor ambient temperature T5 Compressor discharge temperature Table 8. Electronic Control Working Environment Input voltage: 230V Input power frequency: 60Hz Indoor fan normal working amp. is less than 1A Outdoor fan normal working amp is less than 1.5A Four-way valve normal working amp is less than 1A Table 9. Main Protection Three minutes delay at restart for compressor One minute delay for the first time start-up and three minutes delay for others Temperature protection of compressor discharge When the compressor discharge is getting higher, the running frequency will be limited as below rules: If 215.6°F (102°C) < T5 < 244.4°F (115°C), decrease the frequency to the lower level every two minutes until to F1. If T5 < 244.4°F (115°C) for ten seconds, the compressor will stop and restart till T5 < 194°F (90°C) Table 10. Indoor/Outdoor Units Communication Protection If the indoor units cannot receive the feedback signal from the outdoor units for two minutes, the unit will stop and display failure. High Condenser Col Temp Protection When T3>149°F (65°C) for three seconds, the compressor will stop while the indoor fan and outdoor fan will continue. When T3<125.6°F (52°C), the protection will release and the compressor will restart after three minutes. Running Rules If the compressor frequency keeps lower than RET_OIL_FREQ1_ADD for RET_OIL_TIME1_ADD,the AC will rise the frequency to RET_OIL_FREQ2_ADD for RET_OIL_TIME2_

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