SPLIT-TYPE ROOM AIR CONDITIONER

Owner’s Manual &

Installation Manual SENA/09HF/IQ
SENA/09HF/OQ
SENA/12HF/IQ
SENA/12HF/OQ
SENA/18HF/IQ
SENA/18HF/OQ
SENA/24HF/IQ
SENA/24HF/OQ

IMPORTANT NOTE:
Read this manual and SAFETY MANUAL(if any)
carefully before installing or operating your new
air conditioning unit. Make sure to save this
manual for future reference.
Please check the applicable models, technical
data, F-GAS(if any) and manufacturer information
from the “Owner's Manual - Product Fiche ”
in the packaging of the outdoor unit (European Union
products only) or in the packaging of the indoor unit
(model dependent)
 Table of Contents
Safety Precautions ...............................................................................04

Owner’s Manual
Unit Specifications and Features...........................................................07
1.Indoor unit display..........................................................................................................................07
2.Operating temperature...................................................................................................................08
3.Other features ...............................................................................................................................09
4.Setting angle of airflow..................................................................................................................10
5.Manual operation (without Remote)...............................................................................................10

Care and Maintenance......................................................................11

Troubleshooting.................................................................................13
 Installation Manual
Accessories...........................................................................................17
Installation Summary - Indoor Unit ..................................................18
Unit Parts..............................................................................................19
Indoor Unit Installation.......................................................................20
1.Select installation location...........................................................................................................20
2.Attach mounting plate to wall....................................................................................................20
3.Drill wall hole for connective piping...........................................................................................20
4.Prepare refrigerant piping................................................................................................................22
5.Connect drain hose.......................................................................................................................24
6.Connect signal and power cables................................................................................................25
7.Wrap piping and cables...................................................................................................................26
8.Mount indoor unit...........................
...................................................................................................27

Outdoor Unit Installation.........................................................................28

1.Select installation location...............................................................................................................28
2.Install drain joint.............................................................................................................................29
3.Anchor outdoor unit.......................................................................................................................29
4.Connect signal and power cables....................................................................................................30

Refrigerant Piping Connection.........................................................32

A.Note on Pipe Length.....................................................................................................................32
B.Connection Instructions –Refrigerant Piping..................................................................................32
1.Cut pipe..................................................................................................................................32
2.Remove burrs..........................................................................................................................33
3.Flare pipe ends........................................................................................................................33
4.Connect pipes.........................................................................................................................33

Air Evacuation...................................................................................35
1.Evacuation Instructions.................................................................................................................35
2.Refrigerant Release.......................................................................................................................35
3.Note on Adding Refrigerant..........................................................................................................36

Electrical and Gas Leak Checks........................................................37

Test Run.............................................................................................38
Packing and unpacking the unit .....................................................39
Precautions
Safety

Safety Precautions
Read Safety Precautions Before Operation and Installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classified as either a WARNING or CAUTION.

WARNING CAUTION
This symbol indicates the possibility This symbol indicates the possibility of
of personnel injury or loss of life. property damage or serious consequences.

WARNING
This appliance can be used by children aged from 8 years and above and persons with reduced
physical, sensory or mental capabilities or lack of experience and knowledge if they have been given
supervision or instruction concerning use of the appliance in a safe way and understand the hazards
involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be
made by children without supervision(European Union countries).
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 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.

WARNINGS FOR PRODUCT USE

• If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect
the power. Call your dealer for instructions to avoid electric shock, fire or injury.
• Do not insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since
the fan may be rotating at high speeds.
• Do not use flammable sprays such as hair spray, lacquer or paint near the unit. This may cause
fire or combustion.
• Do not operate the air conditioner in places near or around combustible gases. Emitted gas may
collect around the unit and cause explosion.
• Do not operate your air conditioner in a wet room such as a bathroom or laundry room. Too
much exposure to water can cause electrical components to short circuit.
• Do not expose your body directly to cool air for a prolonged period of time.
• Do not allow children to play with the air conditioner. Children must be supervised around the
unit at all times.
• If the air conditioner is used together with burners or other heating devices, thoroughly ventilate
the room to avoid oxygen deficiency.
• In certain functional environments, such as kitchens, server rooms, etc., the use of specially
designed air-conditioning units is highly recommended.

CLEANING AND MAINTENANCE WARNINGS

• Turn off the device and disconnect the power before cleaning. Failure to do so can cause
electrical shock.
• Do not clean the air conditioner with excessive amounts of water.
• Do not clean the air conditioner with combustible cleaning agents. Combustible cleaning agents
can cause fire or deformation.

 Page 4 
 Precautions
Safety
CAUTION
• Turn off the air conditioner and disconnect the power if you are not going to use it for a long time.
• Turn off and unplug the unit during storms.
• Make sure that water condensation can drain unhindered from the unit.
• Do not operate the air conditioner with wet hands. This may cause electric shock.
• Do not use device for any other purpose than its intended use.
• Do not climb onto or place objects on top of the outdoor unit.
• Do not allow the air conditioner to operate for long periods of time with doors or windows open,
or if the humidity is very high.

ELECTRICAL WARNINGS
• Only use the specified power cord. If the power cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
• Keep power plug clean. Remove any dust or grime that accumulates on or around the plug. Dirty
plugs can cause fire or electric shock.
• Do not pull power cord to unplug unit. Hold the plug firmly and pull it from the outlet. Pulling
directly on the cord can damage it, which can lead to fire or electric shock.
• Do not modify the length of the power supply cord or use an extension cord to power the unit.
• Do not share the electrical outlet with other appliances. Improper or insufficient power supply
can cause fire or electrical shock.
• The product must be properly grounded at the time of installation, or electrical shock may occur.
• For all electrical work, follow all local and national wiring standards, regulations, and the
Installation Manual. Connect cables tightly, and clamp them securely to prevent external forces
from damaging the terminal. Improper electrical connections can overheat and cause fire, and may
also cause shock. All electrical connections must be made according to the Electrical Connection
Diagram located on the panels of the indoor and outdoor units.
• All wiring must be properly 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 and cause the connection
points on the terminal to heat up, catch fire, or cause electrical shock.
• If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm
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
must be incorporated in the fixed wiring in accordance with the wiring rules.

TAKE NOTE OF FUSE SPECIFICATIONS

The air conditioner’s circuit board (PCB) is designed with a fuse to provide overcurrent protection.
The specifications of the fuse are printed on the circuit board ,such as :
T3.15AL/250VAC, T5AL/250VAC, T3.15A/250VAC, T5A/250VAC, T20A/250VAC, T30A/250VAC,etc.
NOTE: For the units using R32 or R290 refrigerant , only the blast-proof ceramic fuse can be used.

UV-C lamp(Applicable to the unit contains an UV-C lamp only)

This appliance contains a UV-C lamp. Read the maintenance instructions before opening the appliance.
1. Do not operate UV-C lamps outside of the appliance.
2. Appliances that are obviously damaged must not be operated.
3. Unintended use of the appliance or damage to the housing may result in the escape of dangerous UV-C
radiation. UV-C radiation may, even in small doses, cause harm to the eyes and skin.

 Page 5 
Precautions
Safety

4. Before opening doors and access panels bearing the ULTRAVIOLET RADIATION hazard symbol
for the conducting USER MAINTENANCE, it is recommended to disconnect the power.
5. The UV-C lamp can not be cleaned, repaired and replaced.
6. UV-C BARRIERS bearing the ULTRAVIOLET RADIATION hazard symbol should not be removed.
WARNING This appliance contains an UV emitter. Do not stare at the light source.

WARNINGS FOR PRODUCT INSTALLATION

1. Installation must be performed by an authorized dealer or specialist. Defective installation can

cause water leakage, electrical shock, or fire.
2. Installation must be performed according to the installation instructions. Improper installation
can cause water leakage, electrical shock, or fire.
(In North America,installation must be performed in accordance with the requirement of NEC
and CEC by authorized personnel only.)
3. Contact an authorized service technician for repair or maintenance of this unit. This appliance
shall be installed in accordance with national wiring regulations.
4. Only use the included accessories, parts, and specified parts for installation. Using non-standard
parts can cause water leakage, electrical shock, fire, and can cause the unit to fail.
5. Install the unit in a firm location that can support the unit’s weight. If the chosen location cannot
support the unit’s weight, or the installation is not done properly, the unit may drop and cause
serious injury and damage.
6. Install drainage piping according to the instructions in this manual. Improper drainage may
cause water damage to your home and property.
7. For units that have an auxiliary electric heater, do not install the unit within 1 meter (3 feet) of
any combustible materials.
8. Do not install the unit in a location that may be exposed to combustible gas leaks. If
combustible gas accumulates around the unit, it may cause fire.
9. Do not turn on the power until all work has been completed.
10.When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
11.How to install the appliance to its support, please read the information for details in "indoor unit
installation" and "outdoor unit installation" sections .

Note about Fluorinated Gases

1. This air-conditioning unit contains fluorinated greenhouse gasses. For specific information on the
type of gas and the amount, please refer to the relevant label on the unit itself or the
“Owner's Manual - Product Fiche ” in the packaging of the outdoor unit. (European
Union products only).
2. Installation, service, maintenance and repair of this unit must be performed by a certified
technician.
3. Product uninstallation and recycling must be performed by a certified technician.
4. For equipment that contains fluorinated greenhouse gases in quantities of 5 tonnes of CO2
equivalent or more, but of less than 50 tonnes of CO2 equivalent, If the system has a leak-
detection system installed, it must be checked for leaks at least every 24 months.
5. When the unit is checked for leaks, proper record-keeping of all checks is strongly recommended.

 Page 6 
 Unit Specifications and Features
Indoor unit display

Specifications
and Features
Unit
Air Filter
(pull up)
Front Panel

Remote Control
Louver
Boost Humidity

ECO intelligent eye Remote Control

Holder (Some Units)
Display window

“ ”“ ”Displays temperature, operation feature and Error codes:

“ ” for 3 seconds when:

• TIMER ON is set (if the unit is OFF, “ ” remains on when TIMER ON is set )
• FRESH , UV-C lamp, SWING, TURBO , ECO, BREEZE AWAY,
ECO INTELLIGENT EYE or SILENCE feature is turned on
Display Code
“ ” for 3 seconds when: Meanings
• TIMER OFF is set
• FRESH , UV-C lamp, SWING, TURBO , ECO, BREEZE AWAY,
ECO INTELLIGENT EYE or SILENCE feature is turned off
“ ” when defrosting

“ ” when Active Clean feature is turned on

“ ” when 8°C(46°F) heating mode is turned on

“ ” when ECO feature is activated

“ ” when wireless control feature is activated

NOTE: Different models have different front panel and display window. Not all the indicators
describing below are available for the air conditioner you purchased. Please check the indoor display
window of the unit you purchased.
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor unit
may be slightly different. The actual shape shall prevail.
 Page 7 
 Operating temperature
When your air conditioner is used outside of the following temperature ranges, certain safety
protection features may activate and cause the unit to disable.
Specifications
and Features

Inverter Split Type

Unit

COOL mode HEAT mode DRY mode FOR OUTDOOR UNITS

WITH AUXILIARY
17°C - 32°C 0°C - 30°C 10°C - 32°C ELECTRIC HEATER
Room Temperature
(62°F - 90°F) (32°F - 86°F) (50°F - 90°F)
When outside
temperature is below 0°C
(32°F ), we strongly
Outdoor -30°C - 50°C -30°C - 30°C 0°C - 50°C recommend keeping the
Temperature (-22°F - 122°F) (-22°F - 86°F) (32°F - 122°F) unit plugged in at all
time to ensure smooth
ongoing performance.

NOTE: Room relative humidity less than 80%. If the air conditioner operates in excess of this
figure, the surface of the air conditioner may attract condensation. Please sets the vertical air
flow louver to its maximum angle (vertically to the floor), and set HIGH fan mode.

To further optimize the performance of your unit, do the following:

• Keep doors and windows closed.
• Limit energy usage by using TIMER ON and TIMER OFF functions.
• Do not block air inlets or outlets.
• Regularly inspect and clean air filters.

 Page 8 
 A guide on using the infrared remote is not • Refrigerant Leakage Detection
included in this literature package. Not all The indoor unit will automatically display “EL0C” when
the functions are available for the air it detects refrigerant leakage.
conditioner, please check the indoor display • ECO Intelligent eye
and remote control of the unit you purchased.

Specifications
and Features
The system is controlled intelligently under
Intelligent eye mode. It can detect the people’s

Unit
Other Features
activities in the room. In cooling mode, when you
• Auto-Restart are away for 30 minutes, the unit will automatically
If the unit loses power, it will automatically lower the frequency to save energy(for Inverter
restart with the prior settings once power has models only). And the unit will automatically start
been restored. and resume operation if sensing human activity
• Anti-mildew again.
When turning off the unit from COOL, AUTO
(COOL), or DRY modes, the air conditioner will • Sleep Operation
continue operate at very low power to dry up The SLEEP function is used to decrease energy
condensed water and prevent mildew growth. use while you sleep (and don’t
• Wireless Control need the same temperature settings to
Wireless control allows you to control your air stay comfortable). This function can only
conditioner using your mobile phone and a wireless be activated via remote control. And the Sleep
connection. function is not available in FAN or
For the USB device access, replacement, DRY mode.
maintenance operations must be carried out When in COOL mode, the unit will increase the
by professional staff. temperature by 1°C (2°F) after 1 hour, and will
• Louver Angle Memory
increase an additional 1°C (2°F) after another
When turning on your unit, the louver will hour.
automatically resume its former angle. When in HEAT mode, the unit will decrease the
temperature by 1°C (2°F) after 1 hour, and will
• Active Clean function
decrease an additional 1°C (2°F) after another
-- The Active Clean Technology washes away
hour.
dust, mold, and grease that may cause odors The sleep feature will stop after 8 hours and
when it adheres to the heat exchanger by the system will keep running with the final
automatically freezing and then rapidly thawing temperature reached.
the frost. A “pi-pi” sound will be heard. SLEEP Operation
The Active clean operation is used to produce
more condensed water to improve the cleaning Cool mode(+1 C/2 F) per hour
for the first two hours
effect, and the cold air will blow out. After Set
temperature 1hr 1hr
Keep
running
cleaning, the internal wind wheel then keeps Heat mode( -1 C/2 F) per hour
for the first two hours
operating with hot air to blow-dry the evaporator,
thus preventing the growth of mold and keeping
the inside clean.
-- When this function is turned on, the indoor
unit display window appears “CL ” , after 20 Saving energy during sleep

to 45 minutes, the unit will turn off automatically

and cancel Active Clean function. NOTE:
For multi-split air condtioners, the following
• Breeze Away functions are not available:
This feature avoids direct air flow blowing on Active clean function, Silence feature, Breeze
the body and make you feel indulging in silky away function, Refrigerant leakage detection
coolness. function and Eco feature.

 Page 9 
 • Setting Angle of Air Flow

Setting vertical angle of air flow

While the unit is on, use the SWING
Specifications
and Features

button on remote control to set the direction

Unit

(vertical angle) of airflow. Please refer to the

Remote Control Manual for details.
NOTE ON LOUVER ANGLES Ra
ng
e
When using COOL or DRY mode, do not set
NOTE: Do not move louver by hand. This will
louver at too vertical an angle for long periods
of time. This can cause water to condense on cause the louver to become out of sync. If this
the louver blade, which will drop on your floor occurs, turn off the unit and unplug it for a few
or furnishings. seconds, then restart the unit. This will reset the
When using COOL or HEAT mode, setting the louver.
Fig. A
louver at too vertical an angle can reduce the
performance of the unit due to restricted air flow.
NOTE: According to the relative standards CAUTION
requirement, please sets the vertical air flow Do not put your fingers in or near the blower
louver to its maximum angle under heating and suction side of the unit. The high-speed
capacity test. fan inside the unit may cause injury.

Setting horizontal angle of air flow

The horizontal angle of the airflow can be set by
remote control. please refer to the Remote Control
Manual.
AUTO COOL

Manual Operation(without remote)

Manual control
button
CAUTION Fig. B
The manual button is intended for testing purposes
and emergency operation only. Please do not use this
function unless the remote control is lost and it is
absolutely necessary. To restore regular operation,
use the remote control to activate the unit. Unit must
be turned off before manual operation.
To operate your unit manually:
1. Locate the MANUAL CONTROL button on
the right-hand side panel of the unit.
2. Press the MANUAL CONTROL button one
time to activate FORCED AUTO mode.
3. Press the MANUAL CONTROL button again
to activate FORCED COOLING mode.
4. Press the MANUAL CONTROL button a third
time to turn the unit off.

 Page 10 
 Care and Maintenance

Cleaning Your Indoor Unit 5. Rinse the filter with fresh water, then shake
off excess water.
BEFORE CLEANING OR 6. Dry it in a cool, dry place, and refrain from
MAINTENANCE exposing it to direct sunlight.
7. When dry, re-clip the air freshening filter to

Maintenance
Care and
ALWAYS TURN OFF YOUR AIR CONDITIONER the larger filter, then install it back on the
SYSTEM AND DISCONNECT ITS POWER indoor unit.
SUPPLY BEFORE CLEANING OR MAINTENANCE.

CAUTION
L

Only use a soft, dry cloth to wipe the unit clean. Hold both side of the top PUL

filter in the place marked

If the unit is especially dirty, you can use a cloth with “PULL”, pull it upwards
soaked in warm water to wipe it clean.
• Do not use chemicals or chemically treated
cloths to clean the unit
• Do not use benzene, paint thinner,
polishing powder or other solvents to clean
the unit. They can cause the plastic surface
to crack or deform.
• Do not use water hotter than 40°C (104°F)
to clean the front panel. This can cause the
panel to deform or become discolored.

Cleaning Your Air Filter

A clogged air filter can reduce the cooling efficiency
of your unit, can also make the air flow irregular
and too much noisy, so please clean the air filter
as often as necessary. Once the abnormal noise
of air flow is heard, please clean the air filter
immediately.
1. The air filter is on the top of the air conditioner.
2. Hold both side of the top filter in the place
marked with “PULL”, then pull it upwards.
3. If your filter has small air freshening filters, Remove air freshening filter from back of
unclip them from the larger filter. Clean these larger filter(some units), clean with a hand-
air freshening filters with a hand-held vacuum. held vacuum.

4. Clean the large air filter with warm, soapy

water. Be sure to use a mild detergent.

 Page 11 
 CAUTION Maintenance –
Long Periods of Non-Use
• Before changing the filter or cleaning,
turn off the unit and disconnect its power If you plan not to use your air conditioner for an
supply. extended period of time, do the following:
• When removing filter, do not touch metal
parts in the unit. The sharp metal edges can
cut you.
• Do not use water to clean the inside of the
indoor unit. This can destroy insulation and
cause electrical shock.
• Do not expose filter to direct sunlight when Turn on FAN function until
Maintenance
Care and

Clean all filters

drying. This can shrink the filter. unit dries out completely

Air Filter Reminders (Optional)

Air Filter Cleaning Reminder
After 240 hours of use, the display window on
the indoor unit will flash “CL.” This is a reminder
to clean your filter. After 15 seconds, the unit will Turn off the unit and Remove batteries
revert to its previous display. disconnect the power from remote control

To reset the reminder, press the LED button

on your remote control 4 times, or press the
Maintenance –
MANUAL CONTROL button 3 times. If you don’t Pre-Season Inspection
reset the reminder, the “CL” indicator will flash After long periods of non-use, or before periods
again when you restart the unit. of frequent use, do the following:
Air Filter Replacement Reminder
After 2,880 hours of use, the display window on
the indoor unit will flash “nF.” This is a reminder
to replace your filter. After 15 seconds, the unit
will revert to its previous display.
To reset the reminder, press the LED button
on your remote control 4 times, or press the Check for damaged wires Clean all filters

MANUAL CONTROL button 3 times. If you don’t

reset the reminder, the “nF” indicator will flash
again when you restart the unit.

CAUTION
• Any maintenance and cleaning of outdoor
Check for leaks Replace batteries
unit should be performed by an authorized
dealer or a licensed service provider.
• Any unit repairs should be performed
by an authorized dealer or a licensed
service provider.
Make sure nothing is blocking all air inlets and outlets

 Page 12 
 Troubleshooting

SAFETY PRECAUTIONS
If ANY of the following conditions occurs, turn off your unit immediately!
• The power cord is damaged or abnormally warm
• You smell a burning odor
• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED
SERVICE PROVIDER IMMEDIATELY!

Common Issues

Troubleshooting
The following problems are not a malfunction and in most situations will not require repairs.

Issue Possible Causes

Unit does not turn The Unit has a 3-minute protection feature that prevents the unit from
on when pressing overloading. The unit cannot be restarted within three minutes of being
ON/OFF button turned off.

The unit changes from The unit may change its setting to prevent frost from forming on the unit.
COOL/HEAT mode to Once the temperature increases, the unit will start operating in the
FAN mode previously selected mode again.

The set temperature has been reached, at which point the unit turns off the
compressor. The unit will continue operating when the temperature
fluctuates again.

The indoor unit In humid regions, a large temperature difference between the room’s air
emits white mist and the conditioned air can cause white mist.

Both the indoor and When the unit restarts in HEAT mode after defrosting, white mist may be
outdoor units emit emitted due to moisture generated from the defrosting process.
white mist

The indoor unit makes A rushing air sound may occur when the louver resets its position.
noises
A squeaking sound may occur after running the unit in HEAT mode due to
expansion and contraction of the unit’s plastic parts.

Both the indoor unit Low hissing sound during operation: This is normal and is caused by refrigerant
and outdoor unit make gas flowing through both indoor and outdoor units.
noises
Low hissing sound when the system starts, has just stopped running, or is
defrosting: This noise is normal and is caused by the refrigerant gas stopping or
changing direction.
Squeaking sound: Normal expansion and contraction of plastic and metal parts
caused by temperature changes during operation can cause squeaking noises.

 Page 13 
 Issue Possible Causes
The outdoor unit
The unit will make different sounds based on its current operating mode.
makes noises
Dust is emitted from The unit may accumulate dust during extended periods of non-use, which will be
either the indoor or emitted when the unit is turned on. This can be mitigated by covering the unit during
outdoor unit long periods of inactivity.
The unit may absorb odors from the environment (such as furniture, cooking,
The unit emits a cigarettes, etc.) which will be emitted during operations.
bad odor
The unit’s filters have become moldy and should be cleaned.
The fan of the outdoor
unit does not operate During operation, the fan speed is controlled to optimize product operation.

Operation is erratic, Interference from cell phone towers and remote boosters may cause the unit to
unpredictable, or malfunction.
unit is unresponsive In this case, try the following:
• Disconnect the power, then reconnect.
• Press ON/OFF button on remote control to restart operation.
Troubleshooting

NOTE: If problem persists, contact a local dealer or your nearest customer service center. Provide
them with a detailed description of the unit malfunction as well as your model number.

Troubleshooting
When troubles occur, please check the following points before contacting a repair company.

Problem Possible Causes Solution

Temperature setting may be higher
Lower the temperature setting
than ambient room temperature

The heat exchanger on the indoor Clean the affected heat exchanger
or outdoor unit is dirty

The air filter is dirty Remove the filter and clean it according to
instructions
Poor Cooling The air inlet or outlet of either Turn the unit off, remove the obstruction
Performance unit is blocked and turn it back on
Doors and windows are open Make sure that all doors and windows are
closed while operating the unit
Excessive heat is generated Close windows and curtains during periods
by sunlight of high heat or bright sunshine

Too many sources of heat in the

room (people, computers, Reduce amount of heat sources
electronics, etc.)
Low refrigerant due to leak Check for leaks, re-seal if necessary and
or long-term use top off refrigerant
SILENCE function is activated SILENCE function can lower product
(optional function) performance by reducing operating
frequency. Turn off SILENCE function.

 Page 14 
Problem Possible Causes Solution

Power failure Wait for the power to be restored

The power is turned off Turn on the power

The unit is not The fuse is burned out Replace the fuse
working
Remote control batteries are dead Replace batteries

The Unit’s 3-minute protection Wait three minutes after restarting

has been activated the unit

Timer is activated Turn timer off

There’s too much or too little Check for leaks and recharge the
The unit starts and refrigerant in the system system with refrigerant.
stops frequently
Incompressible gas or moisture Evacuate and recharge the system
has entered the system. with refrigerant
The compressor is broken Replace the compressor

Troubleshooting
The voltage is too high or Install a manostat to regulate the
too low voltage

The outdoor temperature is Use auxiliary heating device

extremely low
Poor heating
performance Cold air is entering through Make sure that all doors and
doors and windows windows are closed during use
Low refrigerant due to leak or Check for leaks, re-seal if necessary
long-term use and top off refrigerant

Indicator lamps The unit may stop operation or continue to run safely. If the indicator
continue flashing lamps continue to flash or error codes appear, wait for about 10
Error code appears and minutes. The problem may resolve itself.
begins with the letters If not, disconnect the power, then connect it again. Turn the unit on.
as the following in the If the problem persists, disconnect the power and contact your nearest
window display of customer service center.
indoor unit:
• E(x), P(x), F(x)
• EH(xx), EL(xx), EC(xx)
• PH(xx), PL(xx), PC(xx)

NOTE: If your problem persists after performing the checks and diagnostics above,
turn off your unit immediately and contact an authorized service center.

 Page 15 
 Error Codes
LED Display Cause

EH 00 Indoor unit EEPROM parameter error

EL 01 Indoor / outdoor units communication error

EH 03 Indoor fan speed has been out of control

EH 60 Indoor room temperature sensor T1 open circuit or short circuit

EH 61 Evaporator coil temperature sensor T2 open circuit or short circuit

EL 0C Refrigerant leakage detection

PC 08 Overload current protection

EC 53 Outdoor ambient temperature sensor T4 open circuit or short circuit

EC 52 Condenser coil temperature sensor T3 open circuit or short circuit

Troubleshooting

EC 54 Compressor discharge temperature sensor TP open circuit or short circuit

EC 51 Outdoor unit EEPROM parameter error

EC 07 Outdoor fan speed has been out of control

PC 00 IPM malfunction or IGBT over-strong current protection

PC 01 Over voltage or over low voltage protection

PC 02 High temperature protection of IPM module

PC 0L Outdoor ambient temperature too low.

PC 04 Inverter compressor drive error

PC 30 Low pressure protection(Only for Multi-Zone Units)

PC 31 High pressure protection(Only for Multi-Zone Units)

Note:
For additional information on how to further diagnose the error codes on the unit, you can go to our website:
https://support.senville.com

 Page 16 
 Accessories
The air conditioning system comes with the following accessories. Use all of the installation parts
and accessories to install the air conditioner. Improper installation may result in water leakage,
electrical shock and fire, or cause the equipment to fail. The items are not included
with the air conditioner must be purchased separately.
Name of Accessories Qty (pc) Shape Name of Accessories Qty (pc) Shape

Manual 2-3 Remote controller 1

Boost Humidity

Drain joint 1 Battery (AAA) 2

Seal Remote controller

1 1
holder

Fixing screw for

Mounting plate 1
BUBBLE
LEVEL

remote controller
50 2
FROM EDGE TO HOLE CENTER:100mm
FROM EDGE TO HOLE CENTER:50mm

100 mm 50 50 100

2
100 4
4 inch 2 2 4
LIQUID GAS
mm inch
150 6
RECOMMAND

holder

Small Filter
1~2
(Need to be installed on
(depending
the back of main air filter

Accessories
on models)
by the authorized
technician while installing
the machine)

Connecting pipe assembly

Name Shape Quantity(PC)

Φ1/4" (6.35mm)
Liquid side Φ3/8" (9.52mm)
Copper line set 1
Φ3/8" (9.52mm)
The correct line set size for
Gas side Φ1/2" (12.7mm) your unit will be included
Φ5/8" (16 mm) with your purchase.
Signal cable
(not included with 50 ft 1
line set)

Drain tube 1

Sealing clay 1

PVC tape roll 2-4

2.5"/3.5" sleeve 1

Edge protector for

2.5"/3.5" sleeve 1

 Page 17
 Installation Summary - Indoor Unit

1 Distance from ceiling is determinded

by the installation method. 2 3
BUBBLE

12cm 12cm 50 2
LEVEL

(4.75in) (4.75in)

FROM EDGE TO HOLE CENTER:100mm

FROM EDGE TO HOLE CENTER:50mm
100 mm 50 50 100
100 4
4 inch 2 2 4
LIQUID GAS
mm inch
150 6
RECOMMAND

2.3m (90.55in)

Select Installation Location Determine Wall Hole Position Attach Mounting Plate

44 5 6

Drill Wall Hole

Connect Piping Connect Wiring
(not applicable for some
locations in North America )
Installation

7
Overview

Wrap Piping and Cable

Prepare Drain Hose (not applicable for some locations in North America )

9 STEP 8

Mount Indoor Unit

 Page 18
 Unit Parts
NOTE: The installation must be performed in accordance with the requirement of local and
national standards. The installation may be slightly different in different areas.

2
3
5
4
6
7

8 9

10
Boost Humidity

11

12

13

Unit Parts
Fig. 2.1

1 Wall Mounting Plate 5 Drainage Pipe 9 Remote controller Holder

2 Front Panel 6 Signal Cable 10 Electrical Panel
3 Louver 7 Refrigerant Piping 11 Power Cable to Disconnect switch
4 Air filter (pull it out) 8 Remote Controller (not included)
12 Disconnect switch (not included)
13 Power cable to outdoor unit (not
included)
NOTE ON ILLUSTRATIONS
Illustrations in this manual are for explanatory purposes. The actual shape of your indoor
unit may be slightly different. The actual shape shall prevail.

 Page 19
 Indoor Unit Installation
Installation Instructions – Indoor unit Refer to the following diagram to ensure
proper distance from walls and ceiling:
Distance from ceiling is determinded
PRIOR TO INSTALLATION by the installation method.
Before installing the indoor unit, refer to the
label on the product box to make sure that the 12cm (4.72in) 12cm (4.72in)
or more or more
model number of the indoor unit matches the
model number of the outdoor unit.
Step 1: Select installation location
Before installing the indoor unit, you must 2.3m (90.55in) or more

choose an appropriate location. The following NOTE:

are standards that will help you choose an If the back holder is not needed to prop
appropriate location for the unit. up the unit:
Proper installation locations meet the Finishing the pipe and cable connections
following standards: before mount the indoor unit on the wall.
 Good air circulation If the installation height is limited, 5cm from
 Convenient drainage the ceiling is allowable, but this can lower
 Noise from the unit will not disturb other product performance. To ensure enough
people space to install and remove the top air filter,
 Firm and solid—the location will not vibrate keep at least 10cm or more from the ceiling.
 Strong enough to support the weight of the The back holder is needed to prop up the
unit unit: If connecting pipe and cable with front
 A location at least one meter from all other panel open, the minimum distance from
electrical devices (e.g., TV, radio, computer) ceiling is 22cm or more, if connecting pipe
DO NOT install unit in the following and cable without front panel(remove it) , the
Indoor Unit
Installation

locations: minimum distance from ceiling is 11cm or

Near any source of heat, steam, or more.
combustible gas Step 2: Attach mounting plate to wall
Near flammable items such as curtains or The mounting plate is the device on which you
clothing will mount the indoor unit.
Near any obstacle that might block air Remove the screw that attaches the mounting
circulation plate to the back of the indoor unit.
Near the doorway
In a location subject to direct sunlight
Screw
NOTE ABOUT WALL HOLE:
If there is no fixed refrigerant piping:
Secure the mounting plate to the wall with
While choosing a location, be aware that you screws. Make sure that mounting plate is flat
should leave ample room for a wall hole (see
against the wall.
Drill wall hole for connective piping step)
for the signal cable and refrigerant piping NOTE FOR CONCRETE OR BRICK WALLS:
that connect the indoor and outdoor units. If the wall is made of brick, concrete, or similar
The default position for all piping is the right material, drill 5mm-diameter (0.2in-diameter)
side of the indoor unit (while facing the unit). holes in the wall and insert the sleeve anchors
However, the unit can accommodate piping to provided. Then secure the mounting plate to
both the left and right. the wall by tightening the screws directly into
the clip anchors.

 Page 20 
 Step 3: Drill wall hole for connective piping Unit: mm(inch)
1. Determine the location of the wall hole based
Horizontal direction ruler 50 2
on the position of the mounting plate. Refer
to Mounting Plate Dimensions. 100 mm 50 50 100
100 4

2. Using a 65mm (2.5in) or 90mm(3.54in) 4 inch 2

LIQUID GAS
2 4
Vertical
(depending on models )core drill, drill a
mm inch
150 6 direction ruler
RECOMMAND
hole in the wall. Make sure that the hole
is drilled at a slight downward angle, so
that the outdoor end of the hole is lower BUBBLE
LEVEL
than the indoor end by about 5mm to
7mm (0.2-0.275in). This will ensure proper CAUTION: The Bubble level on the mounting
water drainage. plate can’t be removed. If it is broken, make
Wall sure to clean up the leaking liquid.
Indoor Outdoor

Indoor unit outline

(0.2-0.275in)

425(16.7)

51(2.0)
5-7mm

295(11.6)
Fig.3.2 pipe hole
NOTE: When the gas side connective pipe is Φ65(2.5)
pipe hole
Φ65(2.5)
Φ 16mm(5/8in) or more, the wall hole should 50(1.9)
be 90mm(3.54in). 120(4.7)

40(1.6)
3. Place the protective wall cuff in the hole. 795(31)
This protects the edges of the hole and
will help seal it when you finish the SENA/09HF/IQ
installation process. SENA/12HF/IQ
Indoor unit outline

Indoor Unit
Installation
490(19.3)
CAUTION

40(1.5)
When drilling the wall hole, make sure

322(12.7)
BUBBLE
LEVEL
50 2

to avoid wires, plumbing, and other

FROM EDGE TO HOLE CENTER:50mm

FROM EDGE TO HOLE CENTER:95mm

100 mm 50 50 100

pipe hole 100 4

4 inch 2 2 4 pipe hole
LIQUID GAS
Φ65(2.5) Φ65(2.5)
sensitive components. mm inch
150 6
RECOMMAND
50(1.9) 95(3.7)

40(1.6)
MOUNTING PLATE DIMENSIONS
Different models have different mounting plates. 965(38)
For the convenience of installation, there are SENA/18HF/IQ
bubble level, carved dimensions on the
570.7(22.5)
mounting plate. Please install the plate and drill Indoor unit outline
wall hole according to the information of the
mounting plate. See the figures below.
60(2.4)

BUBBLE
370(14.6)

LEVEL
50 2

Correct orientation of Mounting Plate

FROM EDGE TO HOLE CENTER:70mm

100 mm 50 50 100
FROM EDGE TO HOLE CENTER:50mm

100 4
4 inch 2 2 4
LIQUID GAS
mm inch
150 6 70(2.8)
RECOMMAND
50(1.9)
50(1.9)

BUBBLE
LEVEL BUBBLE
50 50 2 LEVEL
2 BUBBLE
LEVEL
FROM EDGE TO
FROM EDGE TO HOLE CENTER:50mm

FROM EDGE TO HOLE CENTER:100mm

FROM EDGE TO HOLE CENTER:100mm

100 mm 50 50 100 50 2
4 100 100 4 100 mm 50
100 50
4 inch 2 2 4 100 mm 50 50 100
FROM EDGE TO HOLE CENTER:50mm

LIQUID GAS 4 4 inch

HOLE CENTER:100mm

2 2
HOLE CENTER:50mm

100 4 4 inch 2 mm inch LIQUID 2

mm inch GAS 150 4
150 6 LIQUID 6 GAS
RECOMMAND
RECOMMAND
mm inch
150 6
RECOMMAND
FROM EDGE TO

pipe hole pipe hole

Φ65(2.5) 1140(44.8) Φ65(2.5)

SENA/24HF/IQ

 Page 21
 Step 4: Prepare refrigerant piping If refrigerant piping is already embedded in
The refrigerant piping is inside an insulating the wall, do the following:
sleeve attached to the back of the unit. You must Step 1:Hook the indoor unit on the mounting
prepare the piping before passing it through the plate:
hole in the wall. Refer to the Refrigerant Piping
1. Keep in mind that the hooks on the mounting plate
Connection section of this manual for detailed
are smaller than the holes on the back of the unit.
instructions on pipe flaring and flare torque
If you find that you don’t have ample room to connect
requirements, technique, etc.
embedded pipes to the indoor unit, the unit can be
NOTE ON PIPING ANGLE adjusted left or right by about 30-50mm (1.18-1.95in),
Refrigerant piping can exit the indoor unit from depending on the model.
four different angles:
• Left-hand side 30-50mm 30-50mm
• Left rear (1.18-1.95in) (1.18-1.95in)
• Right-hand side
• Right rear Move to left or right
Refer to figures below for details.
Step 2: Prepare refrigerant piping:
1. Open and fix the position of the panel,
then, unscrew the screws showed in the
picture below, then hold both sides of
the lower panel in the place marked
“PULL”, pull it upwards to release the
buckles, then take the lower panel down.
Indoor Unit
Installation

Unscrew the screws

NOTE ON PIPING CONNECTING
• In some locations of US, a conduit tube
must be used to connect the cable.
To ensure an enough space for the pipes
running and the machine is against the
wall after installation, It is recommended AUTO COOL

to attach the drain hose to the right-hand

side (when you’re facing the back of the unit).
• When choose Left-hand side or Right-hand
side piping, please make sure that the pipes
come out horizontally so as not to affect the
lower panel installtion.

CAUTION
Be extremely careful not to dent or
damage the piping while bending them
away from the unit. Any dents in the
piping will affect the unit’s performance.

 Page 22 
 2. Use the holder at the back of the unit to
prop up the unit, giving you enough room
to connect the refrigerant piping, signal cable,
and drain hose.
Knock-out Panel
(cut depending on the
actual size needed)

If need to cut the big size plastic

panel, cut as shown above.
Use the holder at the back
of the unit against on the
mounting plate to prop up 3. Use scissors to cut down the length of the
the unit insulating sleeve to reveal about 40mm (1.57in)
of the refrigerant piping. This serves two purposes:
• To facilitate the Refrigerant Piping
Step 3. Connect drain hose and refrigerant
Connection process.
piping (refer to Refrigerant Piping Connection • To facilitage Gas Leak Checks and enable
section of this manual for instructions). you to check for dents
Step 4. Keep pipe connection point exposed to 4. Use the holder at the back of the unit to
perform the leak test (refer to Electrical Checks prop up the unit, giving you enough room
and Leak Checks section of this manual). to connect the refrigerant piping, signal cable,
Step 5. After the leak test, wrap the connection and drain hose.
point with insulation tape. 5. Connect the indoor unit’s refrigerant piping

Indoor Unit
Installation
Step 6. Remove the bracket or wedge that is to the connective piping that will join the
propping with insulation tape. indoor and outdoor units. Refer to the
Refrigerant Piping Connection section
Step 7. Using even pressure, push down on the of this manual for detailed instructions.
bottom half of the unit. Keep pushing down 6. Based on the position of the wall hole
until the unit snaps onto the hooks along the relative to the mounting plate, determine the
bottom of the mounting plate. necessary angle of your piping.
7. Grip the refrigerant piping at the base of the bend.
If there is no refrigerant piping embedded in
the wall, do the following: 8. Slowly, with even pressure, bend the piping
towards the hole. Do not dent or damage the
1. Based on the position of the wall hole relative piping during the process.
to the mounting plate, choose the side from
which the piping will exit the unit.
2. If the wall hole is behind the unit, keep the
knock-out panel in place. If the wall hole is to
the side of the indoor unit, remove the plastic
knock-out panel from that side of the unit.
(See figure below). This will create a slot through
which your piping can exit the unit. Use
needle nose pliers if the plastic panel is too
difficult to remove by hand.

 Page 23 
 Step 5: Connect drain hose
By default, the drain hose is attached to the left- BEFORE PERFORMING ANY
hand side of unit (when you’re facing the back ELECTRICAL WORK, READ THESE
of the unit). However, it can also be attached to REGULATIONS
the right-hand side. To ensure proper drainage,
attach the drain hose on the same side that your 1. All wiring must comply with local and national
electrical codes, regulations and must be
refrigerant piping exits the unit. installed by a licensed electrician.
NOTE: In some locations of US, if the machine 2. All electrical connections must be made according
has installed the conduit panel, please choose to the Electrical Connection Diagram located on
right-hand side drainage. the panels of the indoor and outdoor units.
Wrap the connection point firmly with Teflon 3. If there is a serious safety issue with the power
tape to ensure a good seal and to prevent leaks. supply, stop work immediately. Explain your
reasoning to the client, and refuse to install the
Remove the air filter and pour a small amount unit until the safety issue is properly resolved.
of water into the drain pan to make sure that 4. Power voltage should be within 90-110% of
water flows from the unit smoothly. rated voltage. Insufficient power supply can
cause malfunction, electrical shock, or fire.
NOTE ON DRAIN HOSE PLACEMENT 5. If connecting power to fixed wiring, a surge
protector and main power switch should be
Make sure to arrange the drain hose installed.
according to the following figures. 6. If connecting power to fixed wiring, a switch
DO NOT kink the drain hose. or circuit breaker that disconnects all poles and
DO NOTcreate a water trap.
has a contact separation of at least 1/8in (3mm)
must be incorporated in the fixed wiring. The
DO NOT put the end of drain hose in qualified technician must use an approved
water or a container that will collect water. circuit breaker or switch.
7. Only connect the unit to an individual branch
circuit outlet. Do not connect another appliance
to that outlet.
Indoor Unit
Installation

8. Make sure to properly ground the air conditioner.

9. Every wire must be firmly connected. Loose
CORRECT NOT CORRECT wiring can cause the terminal to overheat,
Make sure there are no kinks
or dent in drain hose to ensure
Kinks in the drain hose
will create water traps.
resulting in product malfunction and possible fire.
proper drainage. 10. Do not let wires touch or rest against refrigerant
tubing, the compressor, or any moving parts
within the unit.
11. If the unit has an auxiliary electric heater, it must
be installed at least 1 meter (40in) away from
any combustible materials.
NOT CORRECT NOT CORRECT 12. To avoid getting an electric shock, never touch
Kinks in the drain hose
Do not place the end of the the electrical components soon after the power
drain hose in water or in
will create water traps.
containers that collect water. supply has been turned off. After turning off
This will prevent proper the power, always wait 10 minutes or more
drainage.
before you touch the electrical components.
PLUG THE UNUSED DRAIN HOLE
By default, the drain hole on WARNING
the left side, when facing the
unit, is already plugged. Make BEFORE PERFORMING ANY ELECTRICAL
sure to always keep the unused OR WIRING WORK, TURN OFF THE
drain hole plugged. MAIN POWER TO THE SYSTEM.

 Page 24 
 WARNING WARNING
BEFORE PERFORMING ANY ELECTRICAL ALL WIRING MUST BE PERFORMED
OR WIRING WORK, TURN OFF THE STRICTLY IN ACCORDANCE WITH
MAIN POWER TO THE SYSTEM. THE WIRING DIAGRAM LOCATED
Step 6: Connect signal cable ON THE NEXT PAGE.
The signal cable enables communication between
the indoor and outdoor units. You can use the 5. Feed the signal wire through this slot, from
cable provided with the unit as long as it the back of the unit to the front.
adheres with the local codes and regulations. 6. Facing the front of the unit, connect the wire
according to the indoor unit’s wiring diagram,
Cable Types connect the u-lug and firmly screw each wire
• Outdoor Power Cable: As per local to its corresponding terminal.
codes and regulations (not included)
• Signal Cable: SJOW

Minimum Cross-Sectional Area of

Power and Signal Cables
North America
First open the front panel, then remove
Appliance Amps (A) AWG the lower panel.

15 14
20 12
30 open the
10 Wire cover
40 8
55 6
Terminal
CHOOSE THE RIGHT CABLE SIZE block
The size of the power supply cable, signal Cable
clamp

Indoor Unit
Installation
cable, fuse, and switch needed is determined
by the maximum current of the unit. The Rat baffle(some units)
maximum current is indicated on the nameplate
located on the side panel of the unit. Refer to Knock-out
panel
this nameplate to choose the right cable, fuse,
or switch.
1. Open and fix the position of the panel,
then, unscrew the screw , then hold both NOTE: If the size of the cable is too big, remove
sides of the lower panel in the place the middle small plastic knock-out panel to create
marked “PULL”, pull it upwards to release a slot through which the cable can exit. If you want
the buckles, then take the lower panel to remove the chassis or drain hose, please remove
down(please refer to Page 22-23). the rat baffle first.
2. Open the wire box cover to connect the cable.
In North America
3. Unscrew the cable clamp below the terminal
block and place it to the side. First remove the knok-out panel to create a
4. Facing the back of the unit, remove the plastic slot through whick the conduit tube can
panel on the bottom left-hand side. install. Then make the cable through the
conduit tube and connect to the indoor unit.

 Page 25 
 Step 7: Wrappping and cables
Before passing the piping, drain hose, and the
signal cable through the wall hole, you must
bundle them together to save space, protect
them, and insulate them(This may not applicable
for some locations in US).
1. Bundle the drain hose, refrigerant pipes, and
signal cable as shown below:

Indoor Unit
CAUTION
DO NOT MIX UP LIVE AND NULL WIRES Space behind unit
This is dangerous, and can cause the air Refrigerant piping
conditioning unit to malfunction. Insulation tape
7. After checking to make sure every connection Signal wire Drain hose
is secure, use the cable clamp to fasten the
signal cable to the unit. Screw the cable clamp
DRAIN HOSE MUST BE ON BOTTOM
down tightly.
8. Replace the wire cover on the front of the Make sure that the drain hose is at the bottom
unit, and the plastic panel on the back. of the bundle. Putting the drain hose at the
top of the bundle can cause the drain pan
to overflow, which can lead to fire or water
NOTE ABOUT WIRING damage.
THE WIRING CONNECTION PROCESS MAY
DIFFER SLIGHTLY BETWEEN UNITS AND
REGIONS.
Indoor Unit
Installation

Indoor unit Outdoor unit

Red Red
1 1
Black Black
2 2
White White
3 3
Black L1
L1
Green Red
L2 L2

Green
Interconnecting GND

Cable Green
Main Power
Cable

 Page 26 
 DO NOT INTERTWINE SIGNAL CABLE WITH
OTHER WIRES
While bundling these items together, do not
intertwine or cross the signal cable with any
other wiring.
2. Using adhesive vinyl tape, attach the drain
hose to the underside of the refrigerant pipes.
3. Using insulation tape, wrap the signal wire,
refrigerant pipes, and drain hose tightly
together. Double-check that all items are
bundled.
DO NOT WRAP ENDS OF PIPING
When wrapping the bundle, keep the ends
of the piping unwrapped. You need to access
them to test for leaks at the end of the
installation process (refer to Electrical Checks
and Leak Checks section of this manual)

Step 8: Mount indoor unit

If you installed new connective piping
to the outdoor unit, do the following:
1. If you have already passed the refrigerant
piping through the hole in the wall, proceed
to Step 4.
2. Otherwise, double-check that the ends of the
refrigerant pipes are sealed to prevent dirt or
foreign materials from entering the pipes.
3. Slowly pass the wrapped bundle of refrigerant
pipes, drain hose, and signal wire through the

Indoor Unit
Installation
hole in the wall.
4. Hook the top of the indoor unit on the upper
hook of the mounting plate.
5. Check that unit is hooked firmly on mounting
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. Keep 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
by applying slight pressure to the left and the
right-hand sides of the unit.

 Page 27 
 Outdoor Unit Installation
Install the unit by following local codes and
regulations , there may be differ slightly DO NOT install unit in the following locations:
between different regions. Near an obstacle that will block air inlets
60cm (24in) above and outlets
Near a public street, crowded areas, or
where noise from the unit will disturb others
in) ll Near animals or plants that will be harmed
(12 wa
c m ck
30 ba
m
by hot air discharge
fro Near any source of combustible gas
30cm

Installation
(12
on le in)
In a location that is exposed to large
ft
amounts of dust
In a location exposed to a excessive amounts
60cm
(2
of salty air
on r 4in)
ight
in)
SPECIAL CONSIDERATIONS FOR EXTREME
(79 t WEATHER
m
0c ron
20 in f
If the unit is exposed to heavy wind:
Install unit so that air outlet fan is at a 90°
Installation Instructions – Outdoor unit angle to the direction of the wind. If needed,
build a barrier in front of the unit to protect it
Step 1: Select installation location from extremely heavy winds.
See Figures below.
Before installing the outdoor unit, you must
choose an appropriate location. The following are Strong wind

standards that will help you choose an appropriate

Wind Baffle
location for the unit. Strong
wind
Proper installation locations meet the
following standards:
 Meets all spatial requirements shown in Strong wind
Installation Space Requirements above.
 Good air circulation and ventilation If the unit is frequently exposed to heavy
 Firm and solid—the location can support the rain or snow:
unit and will not vibrate Build a shelter above the unit to protect
it from the rain or snow. Be careful not to
 Noise from the unit will not disturb others obstruct air flow around the unit.
 Protected from prolonged periods of direct If the unit is frequently exposed to salty air
sunlight or rain (seaside):
 Where snowfall is anticipated, raise the Use outdoor unit that is specially designed to
unit above the base pad to prevent ice resist corrosion.
buildup and coil damage. Mount the unit
Outdoor Unit
Installation

high enough to be above the average

accumulated area snowfall. The minimum
height must be 18 inches

 Page 28 
 Step 2: Install drain joint(Heat pump unit only)
IN COLD CLIMATES
Before bolting the outdoor unit in place, you must
install the drain joint at the bottom of the unit. In cold climates, make sure that the drain hose
Note that there are two different types of drain is as vertical as possible to ensure swift water
joints depending on the type of outdoor unit. drainage. If water drains too slowly, it can
If the drain joint comes with a rubber seal freeze in the hose and flood the unit.
(see Fig. A ), do the following:
1. Fit the rubber seal on the end of the drain joint
Step 3: Anchor outdoor unit
that will connect to the outdoor unit. The outdoor unit can be anchored to the
2. Insert the drain joint into the hole in the base ground or to a wall-mounted bracket with
pan of the unit. bolt(M10). Prepare the installation base of the
3. Rotate the drain joint 90° until it clicks in place unit according to the dimensions below.
facing the front of the unit.
4. Connect a drain hose extension (not included)
UNIT MOUNTING DIMENSIONS
to the drain joint to redirect water from the
unit during heating mode. The following is a list of different outdoor
If the drain joint doesn’t come with a rubber unit sizes and the distance between their
seal (see Fig. B ), do the following: mounting feet. Prepare the installation base
1. Insert the drain joint into the hole in the base of the unit according to the dimensions
pan of the unit. The drain joint will click in below.
place.
2. Connect a drain hose extension (not included)
to the drain joint to redirect water from the A
unit during heating mode. Air inlet

Air inlet

B
D

Air outlet

Base pan hole of

outdoor unit
Seal
Seal
H

Drain joint

(A) (B) W

Model Outdoor Unit Dimensions (inch) Mounting Dimensions

number WxHxD Distance A (inch) Distance B (inch)
SENA/09HF/OQ 31.7”x 21.8”x 12.9” (805x554x330mm) 20.1” (511mm) 12.5” (317mm)
Outdoor Unit
Installation

SENA/12HF/OQ 31.7”x 21.8”x 12.9” (805x554x330mm) 20.1” (511mm) 12.5” (317mm)

SENA/18HF/OQ 35.0”x 26.5”x 13.5” (890x673x342mm) 26.1” (663mm) 13.9” (354mm)

SENA/24HF/OQ 37.2”x 31.9”x 16.1” (946x810x410mm) 26.5” (673mm) 15.9” (403mm)

 Page 29 
 If you will install the unit on the ground or WARNING
on a concrete mounting platform, do the
following: BEFORE PERFORMING ANY ELECTRICAL
1. Mark the positions for four expansion bolts OR WIRING WORK, TURN OFF THE MAIN
based on dimensions chart. POWER TO THE SYSTEM.
2. Pre-drill holes for expansion bolts.
3. Place a nut on the end of each expansion bolt. 1. Prepare the cable for connection:
4. Hammer expansion bolts into the pre-drilled
holes.
5. Remove the nuts from expansion bolts, and Appliance Amps (A) AWG
place outdoor unit on bolts.
15 14
6. Put washer on each expansion bolt, then
20 12
replace the nuts.
7. Using a wrench, tighten each nut until snug. 30 10
40 8
WARNING 55 6

WHEN DRILLING INTO CONCRETE, EYE CHOOSE THE RIGHT CABLE SIZE
PROTECTION IS RECOMMENDED AT ALL The size of the power supply cable, signal cable,
TIMES. fuse, and switch needed is determined by the
maximum current of the unit. The maximum
If you will install the unit on a wall-mounted
bracket , do the following: current is indicated on the nameplate located on
the side panel of the unit. Refer to this nameplate
to choose the right cable, fuse, or switch.
CAUTION
Make sure that the wall is made of solid brick, a. Using wire strippers, strip the rubber
concrete, or of similarly strong material. The jacket from both ends of cable to reveal
wall must be able to support at least four about 40mm (1.57in) of the wires inside.
times the weight of the unit. b. Strip the insulation from the ends of the
1.Mark the position of bracket holes based on wires.
dimensions chart. c. Using a wire crimper, crimp u-lugs on the
2. Pre-drill the holes for the expansion bolts. ends of the wires.
3. Place a washer and nut on the end of each
expansion bolt. PAY ATTENTION TO LIVE WIRE
4. Thread expansion bolts through holes in While crimping wires, make sure you clearly
mounting brackets, put mounting brackets distinguish the Live (“L”) Wire from other wires.
in position, and hammer expansion bolts into
the wall.
5. Check that the mounting brackets are level. WARNING
6. Carefully lift unit and place its mounting feet
on brackets. ALL WIRING WORK MUST BE PERFORMED
7. Bolt the unit firmly to the brackets. STRICTLY IN ACCORDANCE WITH THE
8. If allowed, install the unit with rubber WIRING DIAGRAM LOCATED INSIDE OF
gaskets to reduce vibrations and noise. WIRE COVER OF THE OUTDOOR UNIT .
Outdoor Unit
Installation

Step 4: Connect signal and power cables

The outside unit’s terminal block is protected by
an electrical wiring cover on the side of the unit.
A comprehensive wiring diagram is printed on
the inside of the wiring cover.

 Page 30 
2. Unscrew the electrical wiring cover and remove it. In North America
3. Unscrew the cable clamp below the terminal
block and place it to the side. 1. Remove the wire cover from the unit by
4. Connect the wire according to the wiring loosening the 3 screws.
diagram, and firmly screw the u-lug of each 2. Dismount caps on the conduit panel.
wire to its corresponding terminal. 3. Temperarily mount the conduit tubes(not
5. After checking to make sure every connection is included) on the conduit panel.
secure, loop the wires around to prevent rain 4. Properly connect both the power supply and
water from flowing into the terminal.
6. Using the cable clamp, fasten the cable to the low voltage lines to the corresponding
unit. Screw the cable clamp down tightly. terminals on the terminal block.
7. Insulate unused wires with PVC electrical tape. 5. Ground the unit in accordance with local codes.
Arrange them so that they do not touch any 6. Be sure to size each wire allowing several inches
electrical or metal parts. longer than the required length for wiring.
8. Replace the wire cover on the side of the unit, 7. Use lock nuts to secure the conduit tubes.
and screw it in place.
Cover

NOTE: If the cable clamp looks like the following,

please select the appropriate through-hole according to
Screw
the diameter of the wire.

Buckle
Terminal block
Ove
r 1.5
7in.
(40m
m) Connecting cable
Three size hole: Small, Large, Medium
G

Power supply cord

Conduit panel

Wire Cover

When the calbe is not fasten enough, use the Please select the appropriate through-hole according
buckle to prop it up , so it can be clamped tightly. to the diameter of the wire.

Model Minimum Circuit Max Overcurrent Main Power W

number Voltage Amps (MCA) Protection (MOP) Size (AWG)*

SENA/09HF/OQ 208/230V - 1ph 60Hz 9 20 12

SENA/12HF/OQ 208/230V - 1ph 60Hz 9 20 12

SENA/18HF/OQ 208/230V - 1ph 60Hz 18 20 12

SENA/24HF/OQ 208/230V - 1ph 60Hz 20 30 10

Outdoor Unit
Installation

*Main power cable from electrical panel to outdoor unit

Notes:
1. Main power is supplied to outdoor unit only
2. System must be installed on a dedicated circuit
3. Follow all local building codes and NEC regulations
4. Use the above table to size your circuit breaker

 Page 31 
 Refrigerant Piping Connection
When connecting refrigerant piping, do not let substances or gases other than the specified
refrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity,
and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and
injury.
Note on Pipe Length
The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal
efficiency is tested on units with a pipe length of 16.5' (5 meters). A minimum pipe run of 10' (3 meters)
is required to minimize vibration & excessive noise. Refer to the table below for specifications on the
maximum length and drop height of piping.
Maximum Length and Drop Height of Refrigerant Piping per Unit Model

Capacity (BTU/h) Max. Length (ft) Max. Drop Height (ft)

9,000 82 (25m) 33 (10m)

12,000 82 (25m) 33 (10m)

18,000 98 (30m) 66 (20m)

24,000 164 (50m) 82 (25m)

36,000 164 (50m) 82 (25m)

Connection Instructions – Refrigerant Piping

Step 1: Cut pipes

When preparing refrigerant pipes, take extra 90°
Oblique Rough Warped
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
DO NOT DEFORM PIPE
2. Using a pipe cutter, cut the pipe a little longer WHILE CUTTING
than the measured distance.
3. Make sure that the pipe is cut at a perfect 90° Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
Connection
Refrigerant piping

angle.
drastically reduce the heating efficiency
of the unit.

 Page 32 
Step 2: Remove burrs PIPING EXTENSION BEYOND FLARE FORM
Burrs can affect the air-tight seal of refrigerant
piping connection. They must be completely Outer Diameter A (inch)
removed. of Pipe (inch) Min. Max.
1. Hold the pipe at a downward angle to prevent Ø 1/4" (Ø 6.35mm) 0.0275”(0.7mm) 0.05” (1.3mm)
burrs from falling into the pipe. Ø 3/8" (Ø 9.52mm) 0.04” (1.0mm) 0.063”(1.6mm)
2. Using a reamer or deburring tool, remove all Ø 1/2" ( Ø 12.7mm) 0.04” (1.0mm) 0.07” (1.8 mm)
burrs from the cut section of the pipe.
Ø 5/8" ( Ø 16mm) 0.078” (2.0 mm) 0.086”(2.2mm)
Pipe
Reamer
Flare form
A
Point down

Pipe
Step 3: Flare pipe ends 6. Place flaring tool onto the form.
Proper flaring is essential to achieve an airtight 7. Turn the handle of the flaring tool clockwise
seal. until the pipe is fully flared.
1. After removing burrs from cut pipe, seal 8. Remove the flaring tool and flare form, then
the ends with PVC tape to prevent foreign inspect the end of the pipe for cracks and
materials from entering the pipe. even flaring.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe. Make Step 4: Connect pipes
sure they are facing in the right direction, When connecting refrigerant pipes, be careful
because you can’t put them on or change not to use excessive torque or to deform the
their direction after flaring. piping in any way. You should first connect the
Flare nut
low-pressure pipe, then the high-pressure pipe.
MINIMUM BEND RADIUS

Copper pipe
When bending connective refrigerant piping,
the minimum bending radius is 10cm.

4. Remove PVC tape from ends of pipe when

ready to perform flaring work.
Radius ≥ 4" (10cm)
5. Clamp flare form on the end of the pipe.
The end of the pipe must extend beyond the
edge of the flare form in accordance with the
dimensions shown in the table below.

Instructions for Connecting Piping to

Indoor Unit
1. Align the center of the two pipes that you will
connect.
Connection
Refrigerant piping

Indoor unit tubing Flare nut Pipe

 Page 33 
 2. Tighten the flare nut as tightly as possible by
hand.
3. Using a spanner, grip the nut on the unit
tubing.
4. While firmly gripping the nut on the unit
tubing, use a torque wrench to tighten the
flare nut according to the torque values in the
Torque Requirements table below. Loosen
the flaring nut slightly, then tighten again.

TORQUE REQUIREMENTS

Outer Diameter of Pipe (inch) Tightening Torque (lb•ft) Add. Tightening Torque (lb•ft)

Ø 1/4" (Ø 6.35mm) 13 (18N•m) 15 (20N•m)

Ø 3/8" (Ø 9.52mm) 24 (32N•m) 29 (39N•m)

Ø 1/2" (Ø 12.7mm) 36 (49N•m) 43 59N•m)

Ø 5/8" (Ø 16mm) 42 (57N•m) 52 (71N•m)

DO NOT USE EXCESSIVE TORQUE

Excessive force can break the nut or damage the refrigerant piping. You must not exceed
torque requirements shown in the table above.

Instructions for Connecting Piping to Outdoor Unit

1. Unscrew the cover from the packed valve on 6. Loosen the flaring nut slightly, then tighten
the side of the outdoor unit. again.
2. Remove protective caps from ends of valves. 7. Repeat Steps 3 to 6 for the remaining pipe.
3. Align flared pipe end with each valve, and
tighten the flare nut as tightly as possible by USE SPANNER TO GRIP MAIN
hand. BODY OF VALVE
4. Using a spanner, grip the body of the valve. Torque from tightening the flare nut can snap
Do not grip the nut that seals the service off other parts of valve.
valve.

Valve cover
Connection
Refrigerant piping

5. While firmly gripping the body of the valve,

use a torque wrench to tighten the flare nut
according to the correct torque values.

 Page 34 
 Air Evacuation
Preparations and Precautions Note that the service port has a
Schrader valve similar to a tire valve that
Air and foreign matter in the refrigerant circuit will open and close when attaching and
can cause abnormal rises in pressure, which removing the hose.
can damage the air conditioner, reduce its
efficiency, and cause injury. Use a vacuum pump 2. Connect the yellow charge hose from t
and manifold gauge to evacuate the refrigerant manifold gauge to the vacuum pump.
circuit, removing any non-condensable gas and 3. Close the right (red) manifold high
moisture from the system. pressure valve.
Evacuation should be performed upon initial 4. Open the left (blue) manifold low pressure
installation and when unit is relocated. valve. The left gauge should read zero
BEFORE PERFORMING EVACUATION
pressure.
 Check to make sure that both high- 5. Switch on the vacuum pump and run it for
pressure and low-pressure pipes between at least 15 minutes until the left gauge
the indoor and outdoor units are move slightly counter-clockwise to show a
connected properly in accordance with the negative pressure of about -30 inHg.
Refrigerant Piping Connection section of 6. Evacuation is now complete. Close the
this manual. left (blue) manifold low pressure valve and
 Check to make sure all wiring is connected switch off the vacuum pump.
properly. 7. Wait at least 30 minutes and then check
the left (blue) manifold gauge to verify
Evacuation Instructions that ther has been no change in system
pressure. If there is a change in pressure,
Before using the manifold gauge and vacuum refer to the Gas Leak Check section for
pump, read their operation manuals to familiarize how to check for leaks.
yourself with how to use them properly.
Refrigerant Release Instructions
Outdoor
Smaller Unit
High 1. The unit comes pre-charged with
Pressure
Manifold Gauge refrigerant. After checking that there has
Valve
been no change in the system pressure,
Larger Low
Pressure
Manifold 200
250
300
400

Manifold unscrew the cap on the outdoor unit's high

500
300

Low High
150

200

pressure valve (the smaller upper valve).

500
350
100

100

Valve
600

Pressure Pressure
50

0
0 -3
0

Valve Valve
Service Middle
Left
Port Manifold Manifold
Gauge Port Flare nut
Gauge Port
1/4” to 5/16”
Adaptor for
R134A Blue Charge Hose
Coolant
Yellow
Charge Hose
Vacuum Pump Cap
Fig. 6.1 Air Evacuation

1. Connect the blue charge hose of the Valve body Valve stem
Air Evacuation

manifold gauge to the service port on the

outdoor unit’s low pressure valve. Fig. 6.2

 Page 35 
 1. Inset a hex wrench into the valve and turn it
about a 1/4 turn to release some refrigerant OPEN VALVE STEMS GENTLY
into the system. Once the needle moves, close When opening valve stems, turn the hexagonal
the valve. The system is now partially wrench until it hits against the stopper. Do not
pressurized. try to force the valve to open further.
2. Wait for a few minutes to make sure that
there is no change in pressure. The system is
ready to be fully pressurized.
3. Unscrew the blue charge hose from the
service port quickly to minimize the release of
refrigerant throught the Schrader valve.
4. Remove the cap friom the low pressure valve
(the larger lower valve). Using the hex wrench,
open both valves until theu hit thier stops. The
system is now pressurized.
5. Screw back all three caps on all valves and
ports and tughten them by hand.

Note on Adding Refrigerant (R410a)

Depending on the length of the installed piping, you may need to add additional refrigerant to
your system. The unit comes pre-charged for 25' (7.5m) of piping with R410a type refrigerant.
The additional refrigerant to be charged can be calculated using the following formula:
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Connective Air Purging
Additional Refrigerant
Pipe Length (ft) Method
< 25' Vacuum Pump None
Liquid Side: Ø 1/4" (ø 6.35mm) Liquid Side: Ø 3/8" (ø 9.52mm)
> 25' Vacuum Pump (Pipe length – 25') x 0.16oz/ft (Pipe length – 25') x 0.32oz/ft
(Pipe length – 7.5m) x 15g/m (Pipe length – 7.5m) x 30g/m

CAUTION
DO NOT mix refrigerant types.
Air Evacuation

 Page 36 
 Electrical and Gas Leak Checks
Before Test Run WARNING – RISK OF
ELECTRIC SHOCK
Only perform test run after you have completed
ALL WIRING MUST COMPLY WITH LOCAL
the following steps:
AND NATIONAL ELECTRICAL CODES,
• Electrical Safety Checks – Confirm that AND MUST BE INSTALLED BY A LICENSED
the unit’s electrical system is safe and
ELECTRICIAN.
operating properly
• Gas Leak Checks – Check all flare nut Gas Leak Checks
connections and confirm that the system is
not leaking There are two different methods to check for gas
leaks.
• Confirm that gas and liquid (high and low
pressure) valves are fully open Soap and Water Method
Using a soft brush, apply soapy water or liquid
Electrical Safety Checks detergent to all pipe connection points on the
indoor unit and outdoor unit. The presence of
After installation, confirm that all electrical wiring bubbles indicates a leak.
is installed in accordance with local and national
Leak Detector Method
regulations, and according to the Installation
Manual. If using leak detector, refer to the device’s
operation manual for proper usage instructions.
BEFORE TEST RUN
AFTER PERFORMING GAS LEAK CHECKS
Check Grounding Work
After confirming that the all pipe connection
Measure grounding resistance by visual detection points DO NOT leak, replace the valve cover on
and with grounding resistance tester. Grounding the outside unit.
resistance must be less than 0.1Ω.
Note: This may not be required for some Check-point of indoor unit
locations in North America.
Check-point of outdoor unit
DURING TEST RUN D
Check for Electrical Leakage B C
During the Test Run, use an electroprobe and
multimeter to perform a comprehensive electrical A
leakage test.
If electrical leakage is detected, turn off the unit
immediately and call a licensed electrician to find A: Low pressure stop valve
and resolve the cause of the leakage. B: High pressure stop valve
C& D: Indoor unit flare nuts
Note: This may not be required for some
locations in North America.
Gas Leak Checks
Electrical and

 Page 37 
 Test Run

Test Run Instructions DOUBLE-CHECK PIPE CONNECTIONS

During operation, the pressure of the
You should perform the Test Run for at least 30 refrigerant circuit will increase. This may
minutes. reveal leaks that were not present during your
1. Connect power to the unit. initial leak check. Take time during the Test
2. Press the ON/OFF button on the remote Run to double-check that all refrigerant pipe
controller to turn it on. connection points do not have leaks. Refer to
3. Press the MODE button to scroll through the Gas Leak Check section for instructions.
following functions, one at a time: 5. After the Test Run is successfully completed,
• COOL – Select lowest possible temperature and you confirm that all checks points in List
of Checks to Perform have PASSED, do the
• HEAT – Select highest possible temperature
following:
4. Let each function run for 5 minutes, and
a. Using remote control, return unit to
perform the following checks: normal operating temperature.
List of Checks to Perform PASS/FAIL b. Using insulation tape, wrap the indoor
refrigerant pipe connections that you
No electrical leakage left uncovered during the indoor unit
installation process.
Unit is properly grounded
IF AMBIENT TEMPERATURE IS BELOW 17°C
All electrical terminals (62°F)
properly covered
You can’t use the remote controller to turn
on the COOL function when the ambient
Indoor and outdoor units
temperature is below 16°C. In this instance,
are solidly installed
you can use the MANUAL CONTROL button
to test the COOL function.
All pipe connection Outdoor Indoor
points do not leak (2): (2): 1. The MANUAL CONTROL button is located
on the right-hand side panel of the unit.
Water drains properly 2. Press the button 2 times to select the
from drain hose COOL function.
All piping is properly 3. Perform Test Run as normal.
insulated

Unit performs COOL

function properly
AUTO COOL

Unit performs HEAT

function properly

Indoor unit louvers Manual control

rotate properly button

Indoor unit responds to

remote controller
Test Run

 Page 38 
 Packing and unpacking the unit
Instructions for packing and unpacking the unit:

Unpacking:
Indoor unit:
1.Cut the sealing tape on the carton with a knife, one cut on the left, one cut in the middle and one
cut on the right.
2.Use the vice to take out the sealing nails on the top of the carton.
3.Open the carton.
4.Take out the middle support plate if it is included.
5.Take out the accessory package, and take out the connecting wire if it is included.
6.Lift the machine out of the carton and lay it flat.
7.Remove the left and right package foam or the upper and lower packaging foam, untie the
packaging bag.

Outdoor Unit
1.Cut the packing belt.
2.Take the unit out of the carton.
3.Remove the foam from the unit.
4.Remove the packaging bag from the unit.

Packing:
Indoor unit:
1.Put the indoor unit into the packing bag.
2.Attach the left and right package foam or the upper and lower packaging foam to the unit.
3.Put the unit into the carton, then put accessory package in.
4.Close the carton and seal it with the tape.
5.Using the packing belt if necessary.

Outdoor unit:
1.Put the outdoor unit into the packing bag.
2.Put the bottom foam into the box.
3.Put the unit into the carton, then put the upper packaging foam on the unit.
4.Close the carton and seal it with the tape.
5.Using the packing belt if necessary.

NOTE: Please keep all packaging items if you may need in the future.
unpacking the
Packing and
unit

 Page 39 
The design and specifications are subject to change without prior notice for
product improvement. Consult with the sales agency or manufacturer for details.
Any updates to the manual will be uploaded to the service website:
https://support.senville.com, please check for the latest version.

CS014UI-EP(B)
16122000009397
20210719