Haier AS18JDJHRA User manual

SERVICE MANUAL
Wall Mounted Type
DC Inverter
AS50JDJHRA-W
AS18JDJHRA
Model No.
This servic e informatio n is designed for experience d repai r technician s only and is not designe d for use by the genera l public.
It does not contai n warning s or caution s to advise non-technic al individu als of potentia l dangers in attemptin g to servic e a product.
Product s powered by electricit y shoul d be service d or repaire d only by experience d professiona l technicia ns. Any attemp t to service or
Repai r the produc t or product s deal t with in this servic e infor mation by anyone else could result in seriou s injury or death
WARNING
Version V1 Date 20190409
2019 (Qingdao Haier Air Conditioner General corp. , Ltd)
All rights reserved. Unauthorized copying and distribution is a violation of law
COOL
QUIET
FAN
HEAT
PURIFY

Table forcontents
Domestic air conditioner
Contents
1. Introduction............................................................................................ 1
2. Features ................................................................................................ 7
3. Specifications ........................................................................................ 8
4. Sensors list............................................................................................ 9
5. Piping diagrams.....................................................................................10
6. Printed Circuit Board Connector Wiring Diagram..................................11
7. Functions and Control ...........................................................................
8. Dimensional drawings ...........................................................................
9. Center of gravity ..................................................................................
10. Service Diagnosis................................................................................
11. Circuit diagrams ..................................................................................
14
43.
27
25
25

Introduction
Domestic air conditioner
1. Introduction
1.1 Model name explanation
A S 1 8J D J H R A
Indoor unit
Type of indoor unit: S (wall-mounted)
Nominal cooling capacity (18000BTU/h)
Series of indoor units: J-Series
Platform of indoor units:DPlatform
Version number
Heat pump & R410A refrigerant
DC
Apply toT1; 220~240V50HZ/1ph

 Introduction 
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
Domestic air conditioner 
1.2 Safety Cautions
Be sure to read the following safety cautions before conducting repair work.
The caution items are classified into “Warning” and “Caution”. The “Warning” items are especially important
since they can lead to death or serious injury if they are not followed closely. The “Caution” items can also lead
to serious accidents under some conditions if they are not followed. Therefore, be sure to observe all the safety
caution items described below.
About the pictograms
Ƹ This symbol indicates an item for which caution must be exercised.
The pictogram shows the item to which attention must be paid.
żThis symbol indicates a prohibited action.
The prohibited item or action is shown inside or near the symbol.
ƔThis symbol indicates an action that must be taken, or an instruction.
The instruction is shown inside or near the symbol.
After the repair work is complete, be sure to conduct a test operation to ensure that the equipment operates
Normally, and explain the cautions for operating the product to the customer.
1.2.1 Caution in Repair
Warning
Be sure to disconnect the power cable plug from the plug socket before disassembling the equipment for
a repair.
Working on the equipment that is connected to a power supply can cause an electrical shook.
If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits, do not
touch any electrically charged sections of the equipment.
If the refrigerant gas discharges during the repair work, do not touch the discharging refrigerant gas .The
refrigerant gas can cause frostbite.
When disconnecting the suction or discharge pipe of the compressor at the welded section, release the
refrigerant gas completely at a well-ventilated place first.
If there is a gas remaining inside the compressor , the refrigerant gas or refrigerating machine oil
discharges when the pipe is disconnected, and it can cause injury.
If the refrigerant gas leaks during the repair work, ventilate the area. The refrigerant gas can generate
toxic gases when it contacts flames.
The step-up capacitor supplies high-voltage electricity to the electrical components of the outdoor unit.
Be sure to discharge the capacitor completely before conducting repair work . A charged capacitor can
cause an electrical shock.
Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug.
Plugging or unplugging the power cable plug to operate the equipment can cause an electrical shock or
fire.
2

Introduction
Domestic air conditioner
Warning
Do not repair the electrical components with wet hands . Working on the equipment with wet hands can
cause an electrical shock
Do not clean the air conditioner by splashing water. Washing the unit with water can cause an electrical
shock.
Be sure to provide the grounding when repairing the equipment in a humid or wet place, to avoid
electrical
shock.
Be sure to turn off the power switch and unplug the power cable when cleaning the equipment. The
internal fan rotates at a high speed, and cause injury.
Do not tilt the unit when removing it. The water inside the unit can spill and wet the furniture and floor.
Be sure to check that the refrigerating cycle section has cooled down sufficiently before conducting
repair
work. Working on the unit when the refrigerating cycle section is hot can cause burns.
Use the welder in a well-ventilated place. Using the welder in an enclosed room can cause oxygen
deficiency.
1.2.2 Cautions Regarding Products after Repair
Warning
Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to
conduct repair work. Never attempt to modify the equipment. The use of inappropriate parts or tools can
cause an electrical shock, excessive heat generation or fire.
When relocating the equipment, make sure that the new installation site has sufficient strength to
withstand the weight of the equipment.
If the installation site does not have sufficient strength and if the installation work is not conducted
securely, the equipment can fall and cause injury.
Be sure to install the product correctly by using the provided standard installation frame.
Incorrect use of the installation frame and improper installation can cause the equipment to fall, resulting
in injury.
For
integral
units only
Be sure to install the product securely in the installation frame mounted on a window frame.
If the unit is not securely mounted, it can fall and cause injury.
For
integral
units only
3

 Introduction 
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
Domestic air conditioner 
Warning
Be sure to use an exclusive power circuit for the equipment, and follow the technical standards related to
the electrical equipment, the internal wiring regulations and the instruction manual for installation when
conducting electrical work.
Insufficient power circuit capacity and improper electrical work can cause an electrical shock or fire.
Be sure to use the specified cable to connect between the indoor and outdoor units. Make the
connections securely and route the cable properly so that there is no force pulling the cable at the
connection terminals.
Improper connections can cause excessive heat generation or fire.
When connecting the cable between the indoor and outdoor units, make sure that the terminal cover
does
not lift off or dismount because of the cable.
If the cover is not mounted properly, the terminal connection section can cause an electrical shock,
excessive heat generation or fire.
Do not damage or modify the power cable.
Damaged or modified power cable can cause an electrical shock or fire. Placing heavy items on the
power cable, and heating or pulling the power cable can damage the cable.
Do not mix air or gas other than the specified refrigerant (R-410A / R22) in the refrigerant system.
If air enters the refrigerating system, an excessively high pressure results, causing equipment damage
and injury.
If the refrigerant gas leaks, be sure to locate the leak and repair it before charging the refrigerant. After
charging refrigerant, make sure that there is no refrigerant leak.
If the leak cannot be located and the repair work must be stopped, be sure to perform pump-down and
close the service valve, to prevent the refrigerant gas from leaking into the room. The refrigerant gas
itself
is harmless, but it can generate toxic gases when it contacts flames, such as fan and other heaters,
stoves and ranges.
.
When replacing the coin battery in the remote controller, be sure to disposed of the old battery to prevent
children from swallowing it.
If a child swallows the coin battery, see a doctor immediately.
4

 Introduction 
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
Domestic air conditioner 
Caution
Installation of a leakage breaker is necessary in some cases depending on the conditions of the
installation site, to prevent electrical shocks.
Do not install the equipment in a place where there is a possibility of combustible gas leaks.
If a combustible gas leaks and remains around the unit, it can cause a fire.
Be sure to install the packing and seal on the installation frame properly. If the packing and seal are not
installed properly, water can enter the room and wet the furniture and floor.
1.2.3 Inspection after Repair
Warning
Check to make sure that the power cable plug is not dirty or loose, then insert the plug into a power outlet
all the way.
If the plug has dust or loose connection, it can cause an electrical shock or fire.
If the power cable and lead wires have scratches or deteriorated, be sure to replace them.
Damaged cable and wires can cause an electrical shock, excessive heat generation or fire.
Warning
Do not use a joined power cable or extension cable, or share the same power outlet with other electrical
appliances since it can cause an electrical shock, excessive heat generation or fire.
5

 Introduction 
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
Domestic air conditioner 
Caution
Check to see if the parts and wires are mounted and connected properly, and if the connections at the
soldered or crimped terminals are secure. Improper installation and connections can cause excessive
heat generation, fire or an electrical shock.
If the installation platform or frame has corroded, replace it. Corroded installation platform or frame can
cause the unit to fall, resulting in injury.
Check the grounding, and repair it if the equipment is not properly grounded. Improper grounding can
cause an electrical shock.
Be sure to measure the insulation resistance after the repair, and make sure that the resistance is 1 M
ohm or higher.
Faulty insulation can cause an electrical shock.
Be sure to check the drainage of the indoor unit after the repair.
Faulty drainage can cause the water to enter the room and wet the furniture and floor.
1.2.4 Using Icons
Icons are used to attract the attention of the reader to specific information. The meaning of each icon is described in
the table below:
1.2.5 Using Icons List
Icon Type of Information Description
Note Note
A “note” provides information that is not indispensable, but may
nevertheless be valuable to the reader, such as tips and tricks.
Caution Caution
A “caution” is used when there is danger that the reader, through
incorrect manipulation, may damage equipment, loose data, get
an
unexpected result or has to restart (part of) a procedure.
Warning Warning
A “warning” is used when there is danger of personal injury.
Reference
A “reference” guides the reader to other places in this binder or in
this manual, where he/she will find additional information on a
specific topic.
6

Specifications
Domestic air conditioner
2.Features
7
Self Clean
With a new-generation
hydrophilic foil, when
the air conditioner in
cooling or drying mode,
the dust on evaporator
will be taken away by
condensed water
flowing rapidly.
DRY Function
When the unit working in
dry mode, it can adjust
the indoor fan motor
speed automatically
according to the
temperature gap
between setting
temperature and room
temperature so as to get
mild dehumidification or
strong dehumidification.
Precise
Dehumidification
Super IFD
Advanced IFD air
purification filter is able
to remove even the
tiniest particles to keep
room air clean.
Precise Temperature &
Humidity Control
keeps your room air
clean and comfortable.
Eco Sensor
Double human sense
integrated module,
double area detection ,
detection angle 120°
(horizontal), detection
distance within 8m.
Wi-Fi Control
Control your air
conditioning system
with smart phone or
tablet which can
connect internet.
Whispering Air
Optimize the noise
control
technology,such as
frequency
adjustment,fan speed
control and air flue
design decreasing
noise level lowest to 15
dB(A) . (Refer to Dawn
9k).
15
dB(A)
Comfortable Sleep
The 3D airflow is able
to deliver the airflow
horizontally and
vertically, so bring the
feeling like nature wind.
The setting
temperature and the
indoor noise can be
adjusted to a more
comfortable level when
you set the "sleep
mode" during night
sleep.
Intelligent Air
Airflow automatically
upward when cooling
or downward when
heating to spread air
automatically
throughout the large
room while without
blowing directly to
human body.
-15°C Heating
A special design for
heating in cold winter
even at -15°C with
rotary compressor,
etc.
Precise Temp
Control 0.5°C
Can make the setting
temperature by 0.5°C
so to achieve more
precise comfort and
energy saving.
0.5
3 Minutes
Protection
The 3 minutes
protection of the
compressor can avoid
some damages to it
and makes the
compressor have a
longer life.
Indoor 5 Steps
Fan Speed
The indoor can be
remote controlled with
5 steps of fan
speed:powerful/high/
middle/low/quiet,
which offer more
choice for you to get
comfort airflow.
-10°C Cooling
Special design for
cooling even at lowest
ambient temperature
-10ºC with high
frequency rotary
compressor, optimized
refrigerant system and
special defrosting
program etc.
Quiet Mode
Just press the button
“turbo/quiet” on the
remote controller, the
air conditioner will work
in quiet mode.
Warm Start
when the unit start
working at heating
mode,or change from
cooling mode to
heating mode,the unit
will not blow or blow at
super low speed in
order to avoid cold air
disturbance.
3D Airflow
Smart Defrosting
Haier smart defrost
process is only
performed when
needed which reduces
energy waste by
eliminating the
unneeded defrosting
process.Enjoy
maximum comfort in
heating operation by
reducing defrosting
time.
Auto Vertical Airflow
With one special step
motor to adjust the
horizontal flaps moving
vertically and
automatically
，it can
realize 5 positions air
angle,2 intelligent air
angle and total auto
blowing, when the unit
is switched off , the flap
will close automatically.
Easy Support Clip
It is more convenient
for installation by
extending space with
additional support clip,
meanwhile, saving
time.
Detachable
Bottom Cover
With only opening
decoration plate,
installers can connect
piping and wires. The
triangle logo on
bottom of casing can
help to position
mounting plate.
Easy & Quick
Repair Motor
It can realize motor
dismounting and
maintenance without
disassembling
evaporator.
2-way
Piping Design
The indoor unit o ers
the possibility of left
and right piping
direction, easy for
installation.
Self-diagnosis
The LED display of the
indoor units will show
the error code in order
to make service more
easier.
Wide Voltage
For Inverter
The inverter unit can
start up from 150V and
operate in a wide
voltage range from
150V-264V.
Integrative
Structure Design
The optimized design
integrates the bottom
base, drain pan and
frame casing together
so as to level up
product reliability and
lower vibration.
Integrative
Valve Cover
This valve cover is
designed to cover both
wiring terminal block
and stop valves so as
to enhance protect
effect with nice design.
Blue Fin
The hydrophilic
aluminum foil makes
condensing water flow
smoothly so guarantee
the better
performance with
anti-corrosion effect.
Auto Mode
According to the fixed
temperature 26°C
(under cooling)or 23°C
(under heating), the
unit will adjust the
operation mode
automatically.
Long Life
Reliable PCB
Haier PCB is tested 96
hours under hard
enviroment
temperature 85ºC &
moisture 85%, this test
condition is more or
less 10 years under
normal condition.
Auto Restart
The function permits
automatic return to
previous operation
conditions after a
sudden power break.
DIY Auto Mode
You can set a
temperature value,
with which the unit can
adjust the operation
mode automatically.
Consealed
LED Display
Special designed panel and
LED display which make it
possible to show the working
states and functions only
when the unit on while the
display and frame can not be
seen when unit off in order
to keep indoor decoration
with sense of wholeness. Of
course you can cancel the
display whenever you want.
24 Hours Timer
Use the timer function
to set on, or off , or
from on to off , or from
off to on etc, within 24
hours.
1W Standby
Through programme
control optimization,
the stand-by power
consumption has been
lowered from 8W to
about 1W.
PID Inverter
Control
PID Inverter Control
can realize automatic
adjustment of
temperature
difference variables
based on the
proportional integral
theory, through
comparison with
targeted value, to
correct the response
of error correction
system.
3 DC Motor
DC motor ensures
more reliable operation
with much higher
energy saving and
lower noise.

Specifications
Domestic air conditioner
3 Specifications
NOMINAL DISTRIBUTION SYSTEM VOLTAGE
1/esahP
05zHycneuqerF
032VegatloV
NOMINAL CAPACITY and NOMINAL INPUT
cooling heating
Capacity rated
KW
5.2(1.4-6.0) 6.0(1.4-6.9)
Btu/h
17750(4780-20470) 20470(4770-23550)
Power Consumption(Ra 1.51.4 WK)det
4.67.5
W/WPOCS/REES
hWKnoitpmusnocygrenelaunnA
253 1401
h/³mlavomeRerutsioM 2.0*10 ³
TECHNICAL SPECIFICATIONS
1050X235X350
mm
W*D*H
snoisnemiD
1150X347X455 mm W*D*H snoisnemiDdegakcaP
14.9
GK/thgieW
18.9
GK/thgiewssorG
etihW//roloC
Sound level
Sound
peessure(high/medium/low) dB
Sound power(high) dB
53
8
-
53
41/37/3341/37/33

Specifications
Domestic air conditioner
TECHNICAL SPECIFICATIONS-PARTS
cooling heating
Fan
44 W
Air flow rate(high) m³/h 900 900
Speed(high/middle/low) rpm
Heat exchanger
Type ML fin- 7HI-HX tube
Horizontal,Downward
Air filter
Removable/Washable/Mildew Proof
Temperature control
Microcomputer Control
Note: the data are based on the conditions shown in the table below
Indoor: 27 DB/19 WB
Outdoor: 35 DB/24 WB
Indoor:20 DB
Outdoor: 7 DB/6 WB 5m
4 Sensors list
type Description Qty
1
Conversation formulae
Kcal/h= KW×860
Btu/h= KW×3414
cfm=m³/min×35.3
9
10 0/ /750
Pipe sensor Its used for detecting pipe temperature
epyT
ro outputtoM
hctif*egats*tnemgeS 4.1*61*3
ledomrellortnocetomeR
htgnelgnipiPgnitaehgnilooc
Room sensor Its used for detecting room temperature
lortnocnoitceridriA
nafwolfssorC

 Piping diagrams 


Domestic air conditioner 
5ˊPiping diagrams



ＥＥＶ
10
ＥＥＶ

Connector Wiring diagrams
Domestic air conditioner
6. Printed Circuit Board Connector Wiring Diagram
11
Note: Other designations
PCB(1) (Indoor Control PCB)
1) SW1 Connector for Forced operation ON / OFF switch
2)
3)
RV1 Varistor
FUSE1 Fuse 3.15A/250VAC
UNI T MODEL PCB MODEL
0011800909F 35
UNTI MODEL DI SPLAY MODEL
0011800317W
AS50JDJHRA-W
AS50JDJHRA-W
Connectors
PCB(1) (Control PCB) For
1) CN9 Connector for fan motor
2) CN6 Connector for heat exchanger thermistor and Room temperature thermistor
3)
CN5 Connector for UP&DOWN STEP motor
4) CN11 Connector for L&R STEP motor
5) CN21 Connector for power N wire
6) CN17 Connector for power L(In)
7) CN7 Connector for display board
8) CN18 Connector for humidity sensor
J4-ON
J1-OFF J3-OFF
Connector for power L(Out)CN22
9) CN49 Connector for electrostatic dust collection module
10) CN56 Connector for human sensor
11) CN35 Connector for WIFI Module
12) CN15 Connector for drive assy.
13) CN50 Connector for PM2.5
14) CN16 Connector for MAG switch
15) CN12 Connector for Blade
UNTI MODEL PURIFY MODEL
AS50JDJHRA-W
IFD J2-ON

Connector Wiring diagrams
Domestic air conditioner
12
CN15
CN12
CN50
CN16
CN56
CN7
CN25
CN6
CN49
CN11
CN35
SW1
CN18
CN5
CN9

Connector Wiring diagrams
Domestic air conditioner
Wiring diagrams
13
INDOOR UNIT DIAGRAM
B L
W
R
B
B R
CN9
CN7
C N 1 1
C N 1 8
CN5
C N 22
C N 1 7
C N 23 '
LEFT-RIGHT
STEPMOTOR
UP-DOWM
STEPMOTOR
DISPLAY BOARD
AMBIENT T EMP.SENSOR
PIP ING
TEMP .SENSOR
NOTE:
BLACK
RED
BROWN
BLUE
WHITE
YELLOW/GREEN
ANION
GENERATOR
FUSE
DC FAN MOTOR
C N 21
JP 1
TIME LAG
S W 1
EMERGENCY SWITCH
C N 3 5
WIFI
C N 3 0
JP 3
PROGRAM
1.The dotted parts are optional
2.Hazardous substance A should meet the relevant
requirements of standard Q/TR 0603 001 and Q/HR
0603 003.
C N 4 1
C N 4 9
CN6
HUMIDITY SENSOR
C N 5 0
C N 1 2
C N 1 5
C N 1 6
T3.
15A,250VAC
C N 5 6
ANION MODULE
C N 25
U
P
S
HUMAN-LIGHTSENSORS
CONTROLLER
3 (C )
2 (L )
1(N )
POWER SUPPLY
Y /G
TO OUTDOOR UNIT
Y /G
B L B R R
B L
B R
EE
Y /G
C N 4 3
C N 4 4
0011504830

Functions and Control
Domestic air conditioner
7.Funcitions and Control
7.1 Main functions and control specification
7.1.1 Automatic operation
When the running mode is turned to automation after starting the system, the system will first determine the
running mode according to the current room temperature and then will run according to the determined mode.
Tr in the following selection conditions means room temperature, Ts means setting temperature, Tp means
temperature of indoor coil pipe
Tr23ćChooseCoolingMode
Tr˘23ćChoose Heating Mode
After turning to the automation mode, the running mode can be switched between cooling mode, fan mode
and heating mode according to the change of the indoor ambient temperature. But the automatic conversion
between cooling mode and heating mode must be conducted after 15 minutes.
7.1.2 Cooling operation mode
Temperature control range: 16ć---30ć
Temperature difference: 1ć
* Control features: When Tr˄input airflow˅>Ts˄set temperature˅ć, the compressor will be opened, the indoor
fan will operate at the set speed and the mode signal will be sent to the outdoor system. When Tr˄input
airflow˅Ts˄set temperature˅ć, the compressor will be opened, the indoor fan will operate at the set speed
and the mode signal will be sent to the outdoor system. The system will keep the original status if Tr= Ts.
Airflow speed control: (temperature difference 1ć)
Automatic: When Tr>=Ts+3ć, high speed.
When Ts+1ćTr<Ts+3ć, medium speed
When Tr<Ts+1ć, low speed
When the sensor is off, low speed
When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3
minutes (remain at high speed for 3 minutes.) before the next switch.
Manus: When the system is operating, you can set the high, medium or low speed manually. (When the
sensor is on or off, the system will change the speed 2 seconds after receiving the signal.)
*Airgate location control: the location for the airgate can be set according to your needs.
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or dehumidifying).
When the compressor works continuously for 1/6 minutes (adaptable in EEPROM) and the temperature of
the indoor coils has been below zero centigrade for 10 seconds, the compressor will be stopped and the
malfunction will be recorded in the malfunction list. The indoor system will continue to run. When the
temperature of the indoor coil is raised to 7ć, the compressor will be restarted again (the requirement of 3
minutes’ delay should be satisfied.)
* timing system on/off function.
* Dormant control function.
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Domestic AirConditioner
7.1.3 Demoisture mode.
* temperature control range: 16---30ć
* temperature difference: r1ć
Control feature: send the demoisture signal to the outdoorsystem.
When Tr>Ts+2ć, the compressorwill be turned on, the indoorfan will operate at the set speed.
When Tris between the Ts and Ts+2ć, the outdoorsystem will operate at the high demoisture
frequency for10 minutes and then at the low demoisture mode forsix minutes. The indoorfan will
operate at low speed.
When Tr< Ts, the outsystem will be stopped, the indoorfan will be stopped for3 minutes and then
turned to the low speed option.
All the frequency converses have a f1ćdifference.
* Wind speed control: Automatic:
When Tr>= Ts+ 5ć, high speed.
When Ts+3ćdTr< Ts+5ć, medium speed.
When Ts+2ćdTr< Ts+3ć, low speed.
When Tr<Ts+2ć, light speed.
If the outdoorfan stopped, the indoorfan will be paused for3 minutes.
If the outdoorfan stopped formore than 3 minutes and the outdoorsystem still operates, the system
will be changed into light speed mode.
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for3 minutes.) before the next switch.
Manual: When the sensoris off orTr< Ts+3ć, the manual operation can not be made. (obligatory
automatic operation.)
*Airgate location control: the location forthe airgate can be set according to yourneeds.
*Defrosting function: preventing the frosting on the indoorheat exchanger(when cooling or
demoisture). When the compressorworks continuously for1/6 minutes (adaptable in EEPROM) and
the temperature of the indoorcoils has been below zero centigrade for10 seconds, the compressor
will be stopped and the malfunction will be recorded in the malfunction list. The indoorsystem will
continue to run. When the temperature of the indoorcoil is raised to 7ć, the compressorwill be
restarted again (the prerequirement of 3 minutes’ delay should be satisfied.)
* coil protection (synchronic overheating protection) are installed forthe fourdirections latch
malfunctions when demoisturing.
* timing system on/off function.
* Dormant control function.
7.1.4 Heating operation mode.
*temperature control range: 16---30ć
* temperature difference: r1ć
* control feature: the temperature compensation is automatically added and the system will send the
heating signals to the outdoorsystem.
If TrdTs, the outdoorcompressoris turned on, the indoorfan will be at the cold airproof mode.
If Tr>Ts+1, the outdoorsystem is turned off, the indoorfan will be at the heat residue sending mode.
If Tr<Ts+1, the outdoorsystem will be turned on again, the indoorfan will be at the cold airproof mode.
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Functions and Control 

 Functions and Control 
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Domestic air conditioner 
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr<Ts, high speed.
When TsTrTs +2ć, medium speed.
When Tr> Ts+2ć, low speed.
When the airflow speed has no delay from the high to low switching, the speed should be delayed for 3
minutes (remain at high speed for 3 minutes.) before the next switch.
*Airgate location control: the location for the airgate can be set according to your needs.
Coldair proof operation
1. The indoor operation within 4 minutes after the start up is as the following diagram, the air speed can be
raised only after the speed has reached a certain level.
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Setspeed
Heat start temp 1
Lowspeed
Heat start temp 2
Lightspeed
Heat start temp 3
Fan/off
Heat start temp 4
Fan/off
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2. 4 minutes after the start up of the indoor fan, the light airflow and the low airflow will be turned to the set
speed airflow.
3. In the cold air proof operation, the fan won’t stop after the start up.
4. During the cold air proof operation, the indoor system will continuously send ‘indoor high speed’ signals to
the outdoor system.
* Residue heat sending. The indoor fan will send the residue heat at a low speed for 12 seconds.
If other conditions are satisfied, when the compressor stops, the indoor system will operate at a light speed.
The indoor fan will stop when the coil temperature is below the ‘heat start temp 4’.
* Defrosting. When the system receives the defrosting signal from outdoors, the indoor fan will stop and the
indoor temperature display won’t change. At the time, any indoor coil malfunctions will be neglected. When
the outdoor defrosting finishes, the coil malfunction will still be neglected until the compressor has been
started up for 30 seconds. The indoor temperature display will not change and the system operates at the
cold air proof mode.
* Automatic heating temperature compensation: when the system enters the heating mode, the temperature
compensation (4) will be added. When the status is switched off, the compensation will be erased.
7.1.5 Strength operation
The system enters the mode after receiving the ‘strength signal’.
Send strength operation signal to the outdoor system.
The mode change finishes the strength operation.
Entering ‘mute’, you can have normal operation or signal control such as timing to finish the strength
operation.
Keep the high
speed. The fan
doesn’t stop
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 Functions and Control 
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Domestic air conditioner 
When the system is at the automatic option with the strength/ mute function, if the system enters the cooling
mode, the cooling strength/ mute function will be offered; if the system enters the heating mode, then the
heating strength/ mute function will be offered; if the system enters the airflow mode, there will be no
strength/ mute function.
7.1.6 Mute operation
The system enters the mode after receiving the ‘mute signal’.
a. Mute heating: the airflow speed is slight, the system sends the mute signal to the outdoor system.
b. mute cooling: the airflow speed is slight, the system sends the mute signal to the outdoor system.
When the compressor operates, the airflow speed is mute speed. EEPROM is adaptable.
Mute operation can not work under the dehumidifying and airflow-sending operation.
7.1.7 Air refreshing
After receiving the signal from the remote control, (HV series: the background light of the ‘health’ logo is
green. HS series: the ‘health’ indicator will be lighted). If the fan operates, the Nano-Aqua operates to realize
the ions sending function.
If the indoor fan stops, the Nano-Aqua is turned off.
When the Nano-Aqua is turned off, if the air refreshing system is turned on, the Nano-Aqua will be turned on
when the fan operates.
7.1.8 Timing
You can set 24 hours’ on/off timing accordingly. After the setting, the timing indicator will be lightened. Also,
the light will be turning off after the timing is finished. The followings are several timing methods.
1.system /on timing: The timing indicator will be lightened and the indoor system is under the waiting mode.
The light will be turned off when the timing is finished and the rest of the system will operate under a normal
condition. The timing starts since the last reception of the timing signal.
2.system /off timing: When the system is turned on, the timing indicator is lightened, the rest of the system
will operated under a normal condition. When set time comes, the indicator light will be turned off and the
system will be turned off. If you have set the dormant functions, the order of your settings will be operated
according to the timing settings.
3 .system /on and off timing: The settings will be completed according to the orders..
7.1.9 Dormant operation
The dormant timing is an eight hours unadaptable one. The timing signs are shown on the V series board.
(RC series show the dormant signal, the timing light is lighted on the 6 lights board).
2.1 Under the cooling/ dehumidifying operation, after the setting of the dormant operation, the set
temperature will be raised for 1 centigrade after 1 hour’s operation and will be raised for 1 centigrade 1 hour
later. The system will keep this status for 6 hours and then close.
2.2 Under the heating mode, after the setting of the dormant operation, the setting temperature will fall 2
centigrade after 1 hour’s operation and will fall 2 centigrade 1 hour later. 3 hours after the preceding
operations, the set temperature will be raised for 1 centigrade and the system will keep this status for 3 hours
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 Functions and Control 
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Domestic air conditioner 
and then close down.
2.3 During the dormant time, except the change of the system mode or a new press on the dormant setting
keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presses on other keys
will not affect the original timing.
2.4 Indoor fan control under the dormant operation.
If the indoor fan is at the high speed before the dormant operation setting, the speed will be turned to medium
after the setting. If the fan is at the medium speed before the dormant setting, the speed will be turned to low
after the setting. If the fan is at the low speed before the dormant setting, the speed will not change.
7.1.10 Urgent on/off input
Press the urgency button the buzzer will ring. The system will enter the automatic mode if you don’t press the
button for more than 5 seconds.
Under the system off mode, if you press the urgency key for 5 to 10 seconds, the system will start the test
operation.
Under the system off mode, if you press the urgency key for 10 to 15 seconds, the display screen will show
the resume of the last malfunction.
If the system is under operation, the press on the urgency key will stop it.
Under the system off mode, the display screen will show automatic running sign.
Under the system off mode, the system will not receive the remote control signal if the press on the urgency
key doesn’t last for 15 seconds or if the key is loosened.
Urgency operation: If you press the urgency key for less than 5 seconds, the buzzer will ring when you press
the on/off key. The system will enter the urgency operation when the urgency key is loosened. The urgency
operation is fully automatic.
Test operation.
The inlet temperature sensor doesn’t work, the indoor fan and the indoor air direction board motor works
synchronically. High speed airflow, cooling, outdoor system on, etc, will send the ambient temperature 30
centigrade and coil temperature 16 centigrade information to the outdoor system.
Test operation
The defrost protection of the evaporator doesn’t work.
The temperature control doesn’t work.
The test operation will be finished in 30 minutes.
The test operation can be stopped by the relative commands from the remote control.
7.1.11 Low load protection control
In order to prevent the frosting of the indoor heat interaction device, the outdoor system will be stopped if the
indoor heat interaction temperature is below zero centigrade for 5 minutes, but the fan will continue to
operate. The outdoor system will be started again when the heat interaction temperature is above 7
centigrade and the system has been stopped for 3 minutes. The malfunction will be stored in the malfunction
resume and will not be revealed.
7.1.12 High load protection control
The outdoor system will be stopped if the coil temperature is above 65ćfor 2 minutes. The indoor fan will be
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