Lennox VEHW007N432T Installation instructions

VEHW007N432P
VEHW009N432P
VEHW012N432P
VEHW015N432P
VEHW017N432P
VEHW019N432P
VEHW021N432P
VEHW024N432P
VEHW007N432T
VEHW009N432T
VEHW012N432T
VEHW015N432T
VEHW017N432T
VEHW019N432T
VEHW021N432T
VEHW024N432T
Thank you for selecting
INSTALLATION/OPERATION
INSTRUCTIONS
VEHigh Wall Type
VRF SYSTEMS
INDOOR UNITS
©2016 Lennox Industries Inc.
Dallas, Texas, USA
And valid combinations
(see instructions inside)
HW Hi-Wall
UM Universal Mount
CC Compact Cassette
4C 4-Way Cassette
1C 1-Way Cassette
2C 2-Way Cassette
HD High Static Fan Coil
SD Slim Fan Coil
LD Low Static Fan Coil
GD Large Fan Coil HS
AH Air Handler
OA Outside Air
Evaporator Types
Thank you for selecting LENNOX air conditioners.Please read this manual
carefully before operation and keep it for further reference.
K 230/60/3 and 220/50/3
N 380V/50-60Hz/3Ph
G 460V/60Hz/3Ph
Y 230V/60Hz/3Ph
T 220V/50Hz/1Ph
P 230V/60Hz/1Ph
U 220V/50-60Hz/1Ph
Voltage Rating
V E HW 007 N 4 32 PAvailable digit for future ref.
VE
HW
007
N
4
32
P
Evaporator Type: HW, UM, CC, 4C, 1C, 2C, HD, SD, LD, GD, AH, OA
Cooling Capacity MBtu/h
Certification Status: N: Non-certified; C: AHRI/ETL;
Refrigerant: 4: R410a
Voltage Rating: K, N, G, Y, T, P, U
Lennox Global VRF Unit
Internal Use

Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
(1) Execution standard of VRF: ISO 15042-2011.
(2) For the safe operation of this unit, please read and follow the instructions carefully.
(3) During operation, total capacity of indoor units should not exceed the total capacity of
outdoor units. Otherwise, indoor units will not provide enough cooling or heating.
(4) Direct operators or maintainers should well keep this manual.
(5) If this unit fails to operate normally, please contact our service center as soon as possible
and provide the following information:

Content on the nameplate (model number, cooling capacity, production code, ex-factory
date).
Malfunction details (before and after the malfunction occurs).
(6) Each unit has been strictly tested and proved to be qualified before ex-factory. In order to
prevent units from being damaged or operating normally because of improper
disassembly, please do not disassemble the unit by yourself. If you need to disassemble
and check units, please contact our service center. We will send specialists to guide the
disassembly.
(7) All graphics in this manual are only for your reference. For sales or production reasons,
these graphics are subject to change by manufacturer without prior notice.
(8) 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.If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.
(9) Under the standby status, the unit will consume a little power for ensuring reliability of
complete unit, maintaining normal communication and preheating refrigerant. When the
unit won’t be used for a long time, cut off the power of the complete unit. However,
please preheat it when operating the unit next time.
User Notice
Correct Disposal of this product
This marking indicates that this product should not be disposed with other
household wastes throughout the EU. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, recycle it
responsibly to promote the sustainable reuse of material resources. To return
your used device, please use the return and collection systems or contact the
retailer where the product was purchased. They can take this product for
environmental safe recycling.
R410A(R32/125:50/50):2087.5

Contents
1 Safety Precautions........................................................................................................................ 1
2 Product Introduction .................................................................................................................... 3
2.1 Outline of the Unit and Main Parts..............................................................................3
2.2 Rated Operating Condition.........................................................................................3
3 Installation Instruction .............................................................................................................. 3
3.1 Schematic diagram of installation spaces...................................................................4
3.2 Requirements for Communication Line......................................................................4
3.3 Wiring Requirements..................................................................................................5
4 Installation Instructions................................................................................................................ 7
4.1 Installation of Indoor Unit............................................................................................7
4.2 The installation of the rear panel ................................................................................8
4.3 Debugging..................................................................................................................8
4.5 Installation of the drainage pipe..................................................................................9
4.6 Installation the connection pipes ................................................................................9
5 Wiring Work ................................................................................................................................. 9
5.1 Connect Cables and Terminals of Wiring Board.......................................................10
5.2 Power Cord Connection...........................................................................................10
5.3 Connection of Communication Line of IDU and ODU...............................................11
5.4 Connection of Communication Line of Wired Controller...........................................11
5.5 Illuminate for Connection of Wired Controller and Indoor Units Network...............12
5.6 Installation of the indoor unit.....................................................................................12
6 The Best Usage Method ............................................................................................................. 13
7 Maintenance Method................................................................................................................. 13
7.1 Cleaning panel .........................................................................................................13
7.2 Cleaning the air filters...............................................................................................14
7.3 Check before the usage season...............................................................................14
7.4 Check after the usage season..................................................................................15
8 Table of Error Codes for Indoor Unit .......................................................................................... 15
9 Malfunction Analyzing................................................................................................................ 15
9.1 Service center ..........................................................................................................16
9.2 After-sales service....................................................................................................16
10 Adjusting Method Of The Air Direction.................................................................................... 16
10.1 Adjusting air direction up and down........................................................................16
10.2 Adjusting air direction left and right.........................................................................16

1
1 Safety Precautions
means items that must be forbidden! Otherwise, it may lead to personal injury or death or
serious damage.
means items that must be followed! Otherwise, it may lead to personal injury or property
loss.
Follow this instruction to
complete the installation
work. Please carefull read
this manual before unit
startup and service.
Installation should be conducted by
dealer or qualified
personnel. Please do not attempt
to install the unit by
yourself. Improper handling may
result in waterleakage, electric
shock or fire disaster etc.
Before installation,please
check if the power supply
is in accordance with the
requirements specified on
the nameplate.And also
take care of the power
safety.
Make sure the unit can be earthed
properly and soundly after
plugging into the socket so as to
avoid electric shock. Please do not
connect the ground wire to gas
pipe, water pipe, lightning rod or
telephoneline.
Be sure to use the
exclusive accessory and
part to prevent the water
leakage, electric shock
and fire accidents.
If refrigerant leakage happens
during installation, please
ventilate immediately. Poisonous
gas will emerge if the
refrigerant gas meets fire.
Wire size of power cord
should be large enough.
The damaged power cord
and connection wire
should be replaced by
exclusive cable.
After connecting the power cord,
please fix the electric box cover
properly in order to avoid accident.
Never fail to comply with
the nitrigen charge
requirements.Charge
nitrogen when welding
pipes.
Never short-circiut or cancel
the pressure switch to prevent
unit damage.
Please firstly connect the
wired controller before
energization,otherwise
wired controller can not be
used.
Before using the unit, please
check if the piping and wiring
are correct to avoid water
leakage,refrigerant leakage,
electric shock, or fire etc.
High Wall Type Indoor Unit

2
Do not insert fingers or
objects into air outlet/inlet
grille.
Open the door and window and
keep good ventilation in the room
to avoid oxygen deficit when the
gas/oil supplied heating equipment
is used.
Never start up or shut off the
air conditioner by
means of directly plug or
unplug the power cord.
Turn off the unit after it runs at
least five minutes; otherwise it will
influence oil return of the
compressor.
Do not allow children
operate this unit. Do not operate this unit with wet hands.
Turn off the unit or
cut off the power supply
before cleaning the unit,
otherwise electric shock or
injury may happen.
Never spray or flush water
towards unit, otherwise
malfunction or electric shock may
happen.
Do not expose the unit to the
moist or corrosive
circumstances.
Electrify the unit 8 hours
before operation. Please
switch on for 8 hours before
operation. Do not cut off the
power when 24 hours short-time
halting (to protect the compressor).
Volatile liquid, such as
diluent or gas will damage
the unit appearance.Only
use soft cloth with a little
neutral detergent to clean
the outer casing of unit.
Under cooling mode, please don't
set the room temperature too low and
keep the temperature
difference between indoor and
outdoor unit within 5.
If anything abnormal
happens (such as burning
smell), please power off
the unit and cut off the
main power supply, and
then immerdiately contact
LENNOX appointed service
center.If abnormality keeps
going, the unit might be
damaged and lead to
electric shock or fire.
User is not allowed to repair the unit.
Fault service may cause
electric shock or fire accidents.
Please contact LENNOX appointed
service center for help.
High Wall Type Indoor Unit

3
2 Product Introduction
2.1 Outline of the Unit and Main Parts
Note：
The appearances will be different by the different models of air conditioners.
No. Part Name No. Part Name
①Surface panel ④Guide louver
②Filter ⑤Drain pipe
③Wiring cover
2.2 Rated Operating Condition
Item Indoor Condition Outdoor Condition
DBTemperature°C WBTemperature°C DBTemperature°C WBTemperature°C
Rated Cooling 27 19 35 24
Rated Heating 20 15 7 6
3 Preparations for Installation
3.1 Location for Installation
(1) The appliance shall not be installed in the laundry.
(2) The indoor unit should be installed at 2.3m or higher above the floor.
(3) The top holder must be strong enough to support unit’s weight.
(4) Drain pipe can drain water out easily.
(5) There is no obstacle at inlet or outlet. Please ensure good air circulation.
(6) Keep the unit away from heating source, inflammable gas or smoke.
High Wall Type Indoor Unit

4
3.2 Schematic diagram of installation spaces
Notes:
①The unit shall be installed by the professional personnel according to
this installation instruction to ensure proper use.
②Please contact the local LENNOX appointed service center before installation. Any
malfunctioncaused by the unit that is not installed by the LENNOX appointed service
center would probably not be dealt with on time because of the inconvenience of the
business contact.
③It should be guided under the professional personnel when the air conditioner unit is
moved to other place.
3.3 Requirements for Communication Line
Note:
If the unit is installed in the place with strong electromagnetic interference, shielded wire must
be applied on the communication wire between indoor unit and wired controller. Twisted pair line
with shielding function must be applied on the communication wire between indoor unit and indoor
unit (outdoor unit).
3.3.1 Select communication line for indoor unit and wired controller
Fig 3.3.1
High Wall Type Indoor Unit

5
Material type
Total length of
communication line
between indoor unit and
wired controller L (m/feet)
Wire size
(mm2/AWG) Material
Standard Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤250m
(L≤820-1/5feet)
2×0.75~2×1.25
(2×AWG18~2×AW
G16)
IEC
60227-5:200
7
1.Total length of communication line
can't exceed 250m (820-1/5feet).
2.The cord shall be Circular cord (the
cores shall be twisted together).
3.If unit is installed in places with intense
magnetic field or strong interference, it is
necessary to use shielded wire.
3.3.2 Select communication line for indoor unit and indoor unit (outdoor unit)
Fig 3.3.2
Material Type
Total Length L (m/feet)
of Communication
Cable between Indoor
Unit and Indoor
(Outdoor) Unit
Wire size
(mm2/AWG) Material Standard Remarks
Light/Ordinary
polyvinyl
chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
L≤1000m
(L≤3280-5/6feet) ≥2×0.75
(≥2×AWG18) IEC
60227-5:2007
1. If the wire diameter is enlarged to 2×1
mm2(2×AWG16), the total
communication line length can reach
1500 m (4921-1/4feet).
2. The cord shall be Circular cord (the
cores shall be twisted together).
3. If unit is installed in places with
intense magnetic field or strong
interference, it is necessary to use
shielded wire.
3.4 Wiring Requirements
Model Power Cord Size Air Switch apacity
(A)
Minimum Sectional
Area of
Ground Wire(mm2)
Minimum Sectional
Area of Power
Cord(mm2)
VEHW007N432T
VEHW009N432T
VEHW012N432T
VEHW015N432T
VEHW017N432T
VEHW019N432T
VEHW021N432T
VEHW024N432T
220-240V ~ 50Hz 6 1 1
High Wall Type Indoor Unit

6
Model Power Cord Size Air Switch apacity
(A)
Minimum
Sectional Area
of Ground
Wire(mm2)
Minimum Sectional
Area of Power
Cord(mm2)
VEHW007N432P
VEHW009N432P
VEHW012N432P
VEHW015N432P
VEHW017N432P
VEHW019N432P
VEHW021N432P
VEHW024N432P
208~230V ~ 60Hz 6 1 1
Notes:
①Use copper wire only as unit’s power cord. Operating temperature should be within its
rated value.
②If the power cord is more than 15m long, please increase properly the sectional area of
power cord to avoid overload, which may cause accident.
③Above selection requirements: Power cord size is based on BV single-core wire (2~4pc) at
40°Cambient temperature when laying across plastic pipe. Air switch is D type and used at 40°C.
If actual installation condition varies, please lower the capacity appropriately according to the
specifications of power cord and air switch provided by manufacturer.
④If the supply cord is damaged, it must be replaced by the manufacturer or its service agent
or a similarly qualified person in order to avoid a hazard.
⑤Install cut-off device near the unit. The minimum distance between each stage of cut-off
device should be 3mm(The same for both indoor unit and outdoor unit).
High Wall Type Indoor Unit

7
4 Installation Instructions
4.1 Installation of Indoor Unit
Below are dimensions of W, H, D for different models:
Unit: mm
Item
Model W H D
VEHW007N432T
VEHW009N432T 843 275 180
940 298 200
1008 221 319
VEHW007N432P
VEHW009N432P
VEHW012N432P
VEHW015N432P
VEHW017N432P
VEHW012N432T
VEHW015N432T
VEHW017N432T
VEHW019N432P
VEHW021N432P
VEHW024N432P
VEHW019N432T
VEHW021N432T
VEHW024N432T
High Wall Type Indoor Unit

8
4.2 The installation of the rear panel
Fig 4.2
(1) Find the horizontal position by the seton method; since the drainage pipe is on the left
side, it is necessary to adjust the rear panel to make its left side a little bit lower.
(2) Fix the rear panel on the wall by bolts.
(3) After installing the rear panel, pull it by hands to check if it is secured enough. The hang
panel should support the weight of an adult (60kg), and the weight shared by every bolt
should be fairly even.
(4)
The diameter showed in Fig.4.2 is 65mm.
4.3 Debugging
Setting of main indoor unit must be done after finishing installation of unit. Otherwise, the
whole system will report “L7” error and the whole unit cannot operate.
The indoor unit defaults to be slave indoor unit when ex-factory. During project debugging, if
master indoor unit hasn’t been set manually, the outdoor unit will appoint one indoor unit as the
master indoor unit automatically. Then you can reset the master indoor unit by remote controller or
wired controller.
4.3.1 Setting by remote controller
Point the remote controller at the light board or wired controller
In fan mode, set master mode indoor unit through ▲ and ▼ button:
(1) Adjust set temperature to 30℃.
(2) Within 5 seconds, press ▼ button and then press ▲ button repeatedly for three times.
After finishing setting, “UC” is displayed on receiver light board for 5 seconds and “MASTER”
icon is displayed on wired controller.
4.3.2 Setting by wired controller
High Wall Type Indoor Unit

9
4.4 Preparation of the piping hole
(1) Make the piping hole (Φ65mm) in the wall at aslight downward slant to the outdoor side.
The center of the hole should be determined referring to Fig.4.2.
(2) Insert the piping-hole sleeve into the hole to prevent the connected piping and wiring
from being damaged when passing through the hole.
4.5 Installation of the drainage pipe
(1) For proper draining, the drain hose should be placed at a downward sloping.
(2) Do not wrench or bend the drain hose or flood its end by water. (Fig.4.4)
(3) Wrap the drain hose with heat resistant material.
Fig 4.4
4.6 Installation the connection pipes
Connect the ends of the connection pipe with two leading pipes, and then tighten the joint nuts
tightly.
Connect the connect pipe with the two relative leading pipe, tie the nut on tie –in of the
connect pipe tightly.
Notes:
①Be careful in bending the connection pipes, or you would damage the pipes.
②If the tightening torque for the flare nut is too great, leakage would happen.
5 Wiring Work
Warning!
Before obtaining access to terminals, all supply circuits must be disconnected.
High Wall Type Indoor Unit

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Notes:
①Units must be earthed securely, or it may cause electric shock.
②Please carefully read the wiring diagram before carry out the wiring work, incorrect wiring
could cause malfunction or even damage the unit.
③The unit should be powered by independent circuit and specific socket.
④The wiring should be in accordance with related regulations in order to ensure the units
reliable running.
⑤Install circuit breaker for branch circuit according to related regulations and electrical
standards.
⑥Keep cable away from refrigerant pipings, compressor and fan motor.
⑦The communication wires should be separated from power cord and connection wire
between indoor unit and outdoor unit.
⑧Adjust the static pressure via wired controller according to site circumstance.
5.1 Connect Cables and Terminals of Wiring Board
Connection of Wire and Patch Board Terminal
(1) The connection of wire (as shown in fig 5.1.1)
①Strip about 25mm insulation of the wire end by stripping and cutting tool.
②Remove the wiring screws on the terminal board.
③Shape the tail of wire into ring by needle nose plier, and keep the gauge of ring in
accordance with screw.
④Use the screwdriver for tightening the terminal.
(2) The connection of stranded wire (as shown in fig 5.1.2)
①Strip about 10mm insulation of the end of stranded wire by stripping and cutting tool.
②Loosen the wiring screws on terminal board.
③Insert the wire into the ring tongue terminal and tighten by crimping tool.
④Use the screwdriver for tightening the terminal.
Fig 5.1.1 Fig 5.1.2
5.2 Power Cord Connection
Note:
All indoor units must be unified of power supply so that they can be powered ON/OFF at the
High Wall Type Indoor Unit

11
same time.
Fig 5.2
For units with single-phase power supply.
(1) Detach the electric box lid.
(2) Let the power cord pass through the wiring through-holes.
(3) Connect the power cord to terminal "L, N, ".
(4) Fix the power card with wiring clamp.
5.3 Connection of Communication Line of IDU and ODU
(1) Open the cover of electric box of indoor unit.
(2) Lead the communication line across the rubber ring.
(3) Connect the communication line to terminal D1 and D2 on the 4-digit wiring board of
indoor unit, as shown in Fig.5.3.1.
Fig 5.3.1 Fig 5.3.2
(4) Secure the communication line with the wire clamp on the electric box.
(5) In order to ensure the reliability of communication between IDU and ODU and the
communication among each IDU, add a matched resistance(supplied in a package
before ex-factory) on the wiring board of the last indoor unit in a series connection. The
matched resistance should be connected in parallel between terminal screw D1 and D2,
as shown in Fig.5.3.2.
5.4 Connection of Communication Line of Wired Controller
(1) Open the cover of electric box of indoor unit.
(2) Lead the communication line of wired controller across the rubber ring.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
High Wall Type Indoor Unit

12
(4) Fix the communication wire with wire clip on the electric box.
5.5 Illuminate for Connection of Wired Controller and Indoor Units
Network
(1) Communication wire of indoor unit and outdoor unit (or indoor unit) is connected to
D1,D2.
(2) Wired controller is connected to H1,H2.
(3) One indoor unit can connect two wired controllers that must be set as master one and
slave one.
(4) One wired controller can control 16 indoor unitS in maximum at the same time.
Notes:
①The type of indoor units must be the same if they are controlled by the same wired
controller.
②When the indoor unit is controlled by two wired controllers, the addresses of the two
wired controllers should be different through address setting. Address 1 is for main
controller; Address 2 is for slave controller. Detailed setting please refer to the instruction
manual of wired controller.
5.6 Installation of the indoor unit
(1) When routing the piping and wiring from the left or right side of the
indoor unit, it is necessary to cut off the tailings of the pipe left on the holder of the
unit. (Shown in Fig.5.6)
Cut down tailings 1 when only the power cord is led.
Cut down tailings 1,2 (or 1,2,3) when the connection cord and wire are led.
The piping types ①,②,③are recommended.
(2) Let the tubing and cord pass though the piping hole after tied up (refer to Fig .5.6 (d)).
(3) Hang the claw behind the indoor unit on the pothook on the wall panel, and move the unit
left and right to check if the body is firm.
(4) Guarantee that the installation height of the indoor unit should be 2.5m above the floor.
Fig 5.6
High Wall Type Indoor Unit

13
6 The Best Usage Method
(1) Adjust the set temperature properly in proper to prevent electricity wasting. It is better
tocontrol the difference of the indoor and outdoor temperatures within 5°C.
(2) The better effect will be maintained by adjusting the guide louver downward for heating
and horizontal for cooling.
(3) When the air conditioner is running, don’t open windows or doors for long time, otherwise
the efficiency of unit will be lowered.
(4) Prevent the cooled air blowing to body directly for long time and making indoor
temperature too low, for it is bad for health.
(5) Do not pour water to unit or clean it by water, otherwise a malfunction or electric shock
may happen.
(6) Do not mangle the power cord and the communication cord. The damaged power cord
and communication cord can only be replaced by the specified ones.
(7) This air conditioner allows voltage fluctuation within 220±10%V.
(8) This air conditioner cannot be used for drying clothes and refrigerating food, etc..
7 Maintenance Method
Warning：
(1) Do turn off the unit and cut off the power when cleaning the air conditioner, otherwise
electric shock may happen.
(2) Do not make the air conditioner wet or electric shock may be incurred; Ensure that the air
conditioner will not be cleaned by water rinsing under any circumstance.
(3) Volatile liquid like thinner or gasoline would damage the appearance of the air conditioner.
(Only soft dry cloth and wet cloth moistened with neutral detergent could be used to
clean the surface panel of the air conditioner.)
7.1 Cleaning panel
Note：
High Wall Type Indoor Unit

14
Do take down it before cleaning.
(1) Pull along the direction of arrows to take down the panel.
(2) Clean the panel
Clean it with a soft-hair brush, water and neutral cleaning fluid, and then dry it.
Caution：
Do not use water above 45°C to wash the panel to prevent decoloration or deformation.
(3) Install the panel
As shown in Fig.II, install the stands of both ends of the panel into the slot and put the middle
rotating shaft into the groove, then place the panel and clasp back along the arrow direction.
Fig 7.1.1 Fig 7.1.2
7.2 Cleaning the air filters
Clean it once every 3 months; When the usage environment has lots of dust, it should be
cleaned more frequently.
(1) Take down the air filter
As shown in Fig.III, open the surface panel by holding the both ends of groove along the
arrow direction, and then take the air filter out downward.
(2) Clean the filter
Use cleaner or water to wash the filter; if the filter is too dirty ( like oil stain on it ), warm water
( lower than 45°C) with neutral detergent can be used, then dry it in the shade.
Note:
①Do not clean the filter by hot water higher than 45°C for preventing fade or deformation.
②Do not burn it on fire or the filter would catches fire or deformation.
(3) Install air filter
Install the air filter properly along the arrow direction, making the side marked “Front” facing
yourself and then place the panel back.
Fig 7.2.1 Fig 7.2.2
7.3 Check before the usage season
(1) Check if there is blockage in the inlet or outlet vent of the air conditioner.
(2) Check if the earth wire is earthed reliably.
High Wall Type Indoor Unit

15
(3) Check if the batteries in the wireless remote controller have been replaced.
(4) Check if the air filter has been installed properly
In order to start up the air conditioner smoothly after it has been turned off for a long time
period, energize the unit 8 hours before turning it on.
7.4 Check after the usage season
(1) Clean filter and body of air conditioner.
(2) Cut off the main power supply of air conditioner.
8 Table of Error Codes for Indoor Unit
Error
Code Content Error Code Content Error Code Content
L0 Indoor Unit Error L9 Quantity Of Group Control Indoor
Units Setting Error d8 Water Temperature Sensor Error
L1 Indoor Fan Protection LA Indoor Units Incompatibility Error d9 Jumper Cap Error
L2 E-heater Protection LH Low Air Quality Warning dA Indoor Unit
Network Address Error
L3 Water Full Protection LC Outdoor-Indoor Incompatibility
Error dH Wired Controller Circuit Board
Error
L4 Wired Controller Power
Supply Error d1 Indoor Unit Circuit Board Error dC Capacity DIP Switch Setting Error
L5 Anti-freezing Protection d3 Ambient Temperature Sensor Error dE Indoor Unit CO2Sensor Error
L7 No Master Indoor Unit Error d4 Inlet Pipe Temperature Sensor
Error C0 Communication Error
L8 Power Insufficiency
Protection d6 Outlet Pipe Temperature Sensor Error AJ Filter Cleaning Reminding
db Special Code:
Project Debugging Code dL Outlet Air Temperature Sensor
Error
9 Malfunction Analyzing
Warning:
Do not repair the air conditioner by yourself for the incorrect repair would lead to electric
shockor fire. Please contact the service center and have the unit repaired by the specialized
personnel. Check the following items before contacting the service center, as it could save your
time and cost.
Malfunction Phenomena Malfunction Analyzing
The air conditioner could not start up
just after turned off The over load protection switch of the unit makes it run after 3 minutes delay
Odor gave out when the unit just was
turned on Odors or cigarette smoke which has been absorbed in is discharged out.
Slight bicker was heard when the unit
was running This is the sound of the running refrigerant
Mist came from the air outlet vent when
cooling Indoor air is cooled rapidly
High Wall Type Indoor Unit

16
Creak sound was heard when the unit
was running or after it was turned off It is the sound emitted by the expansion of the panel and other parts because of the temperature change.
The air conditioner failed to run
Is the power supply cut off ?
Is the power supply connected ?
Is the circuit protector started aside ? Is the voltage too high or too low ?
If TIMER had been set on the wireless remote controller ?
The cooling (heating) effect of the air
conditioner was not good
Is the temperature set properly ?
Is the inlet, outlet vent of the outdoor unit blocked ?
Is the air filter too dirty to cause blockage ?
Are windows and doors closed ? Is the air speed too low ?
Is there other heat source in the room ?
The wireless remote controller cannot
work
In the event that the battery is replaced but the wireless remote control still
malfunctions, then open the back cover and press
“ACL” button to make it normal.
When the air conditioner is under abnormal interference or its functions are
changed too frequently, then the wireless remote controller would works
improperly. At this time, it is available to resume the normal operation through
de-energizing and then energizing the wireless controller again.
Is the controller within the receiving area? or is there blockage? Check if the
voltages of batteries in the wireless remote controller are sufficient; Otherwise
change the batteries.
9.1 Service center
When the following phenomena appeared, please stop operating immediately, cut off the
main power supply of the unit and then contact the service center of the air conditioner.
Harsh sound heard when running;
The fuse or protector opened frequently;
Substance or water pulled in the unit involuntarily;
Water leakage in room;
Power cord overheated;
Abnormal odor is given out when running.
9.2 After-sales service
When quality or other problems arise upon the purchased air conditioner, please contact the
local service center.
10 Adjusting Method Of The Air Direction
10.1 Adjusting air direction up and down
(1) Controlling the guide louver motor by the wireless remote controller can make the guide
louver swing up and down, or makes the guide louver stop at a certain angle to have air
supplied.
(2) Press the SWING button on the wireless remote controller to make the guide louver
swing up and down; Repress again to stop the operation.
10.2 Adjusting air direction left and right
Moving the vertical louver left and right can adjust the left and right direction of air outlet, or
adjust the air outlet to reach every corner of the room by 3 different outlet directions to make the
indoor temperature more even.
High Wall Type Indoor Unit

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2016 Lennox Industries Inc.
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