LG ABNW85GB9A0 User manual

Air Conditioner
SVC MANUAL(General)
CAUTION
Before Servicing the unit, read the safety precautions in General SVC manual.
Only for authorized service personnel.
Internal Use Only
http://biz.lgservice.com

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Air Conditioner Service Manual
TABLE OF CONTENTS
Part 1 General Information ..........................................................................................................3
1. Safety Precautions........................................................................................................4
2. Model Line Up................................................................................................................7
3. Nomenclature ................................................................................................................8
Part 2 Functions & Controls......................................................................................................10
1. List of Functions & Accessory...................................................................................11
2. Installation Functions.................................................................................................13
3. Reliability .....................................................................................................................16
4. Convenience Functions & Controls .........................................................................17
5. Special Function & KIT...............................................................................................25
Part 3 Basic Control ..................................................................................................................26
1. Normal operation ........................................................................................................27
2 Compressor control ....................................................................................................27
3. EEV( Electronic Expansion Valve) control ...............................................................27
Part 4 Trouble Shooting ...........................................................................................................28
1. Self-diagnosis Function ............................................................................................29
2. Pump Down ................................................................................................................33
3. Evacuation..................................................................................................................34
4. Gas Charging..............................................................................................................35
5. Cycle Part....................................................................................................................36
6. Electronic Parts..........................................................................................................37

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. Safety Precautions ............................................................................................................4
2. Model Line Up .....................................................................................................................7
3. Nomenclature......................................................................................................................8
Part 1 General Information

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1 General Information
1. Safety Precautions
1.1 Cautions in Repair
To prevent injury to the user or other people and property damage, the following instructions must be followed.
nIncorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the follow-
ing indications.
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to properties only.
nMeanings of symbols used in this manual are as shown below.
Be sure to disconnect all remote electric power supplies before servicing. Internal
components and circuit boards are at main potential when the equipment is con-
nected to the power cables. This voltage is extremely dangerous and may cause
death or severe injury if come in contact with it.
Do not touch the discharging refrigerant gas during the repair work.
The refrigerant gas can cause frostbite.
Release the refrigerant gas completely at a well-ventilated place first.
Otherwise, when the pipe is disconnected, refrigerant gas or refrigerating machine
oil discharges and it can cause injury.
When the refrigerant gas leaks during work, execute ventilation. If the refrigerant
gas touches to a fire, poisonous gas generates. A case of leakage of the refriger-
ant and the closed room full with gas is dangerous because a shortage of oxygen
occurs. Be sure to execute ventilation.
When removing the front panel or cabinet, execute short-circuit and discharge
between high voltage capacitor terminals. If discharge is not executed, an electric
shock is caused by high voltage resulted in a death or injury.
Be sure to provide the grounding when repairing the equipment in a humid or wet
place, to avoid electrical shocks.
Be sure not to do.
Be sure to follow the instruction.
Dangerous Voltage
Be sure to provide grounding.

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1 General Information
Do not use a defective or underrated circuit breaker. Use the correctly rated break-
er and fuse. Otherwise there is a risk of fire or electric shock.
Install the panel and the cover of control box securely. Otherwise there is risk of
fire or electric shock due to dust, water etc.
Indoor/outdoor wiring connections must be secured tightly and the cable should be
routed properly so that there is no force pulling the cable from the connection ter-
minals. Improper or loose connections can cause heat generation or fire.
Do not touch, operate, or repaire the product with wet hands. Hoding the plug by
hand when taking out. Otherwise there is risk of electric shock or fire.
Use a vacuum pump or Inert (nitrogen) gas when doing leakage test or air purge.
Do not compress air or Oxygen and Do not use Flammable gases. Otherwise, it
may cause fire or explosion.
- There is the risk of death, injury, fire or explosion.
Do not turn on the breaker or power under condition that front panel, cabinet, top
cover, control box cover are removed or opened.
- Otherwise, it may cause fire, electric shock, explosion or death.
Be sure to earth the air conditioner with an earthing conductor connected to the
earthing terminal.
Conduct repair works after checking that the refrigerating cycle section has cooled
down sufficiently. Otherwise, working on the unit, the hot refrigerating cycle section
can cause burns.
Do not tilt the unit when removing panels. Otherwise, the water inside the unit can
spill and wet floor.
Do not use the welder in a well-ventilated place. Using the welder in an enclosed
room can cause oxygen deficiency.
Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1 General Information
1.2 Inspections after Repair
Check to see if the parts are mounted correctly and wires are connected.
Improper installation and connections can cause an electric shock or an injury.
Check the installation platform or frame has corroded. Corroded installation plat-
form or frame can cause the unit to fall, resulting in injury.
Be sure to check the earth wire is correctly connected.
After the work has finished, be sure to do an insulation tset to check the resis-
tance is 2[Mohm] or more between the charge section and the non-charge metal
section (Earth position). If the resistance value is low, a disaster such as a leak or
electric shock is caused at user’s side.
Check the drainage of the indoor unit after the repair. If drainage is faulty the
water to enter the room and wet floor.
Check to see if the terminal block is not dirty or loose. If terminal block is dust or
loose it can cause an electrical shock or fire.
Do not use a joined power cable or extension cable, or share the same power
outlet with other electrical appliances. otherwise, it can cause an electrical shock,
excessive heat generation or fire.
Do not insert hands or other objects through the air inlet or outlet while the prod-
uct is operating. There are sharp and moving parts that could cause personal
injury.
Do not block the inlet or outlet of air flow. It may cause product failure

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
2. Model Line Up
Part 1 General Information
2.1 Indoor unit
• Celling Concealed Duct –High static pressure
ABNW85GB9A0 [UB85 N94]
ABNW70GB9A0 [UB70 N94]
Category Chassis Name
Capacity Index [kW (kBtu/h)]
23.0 (85) 20.0 (70)
Ceiling
Concealed
Duct
High Static
Pressure B9 ABNW85GB9A0 [UB85 N94]
ABNW70GB9A0
[UB70 N94]
2.2 Outdoor unit
DC Inverter AUUW85LAE [UU85W U74] AUUW70LAE [UU70W U34]
No. of connectable indoor units 1 ~ 4 1 ~ 4
Total capacity index of
connectable indoor units(kW) 23.0 20.0
Power supply 3Ø, 380 - 415V, 50Hz 3Ø, 380 - 415V, 50Hz
Chassis

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1 General Information
A U U W85 L A E
Model type
Standard
Electrical rating
G: 1Ø, 220-240V, 50Hz / 1Ø, 220V, 60Hz
L : 3Ø, 380-415V,50Hz / 3Ø, 380V, 50Hz
Capacity Code based on ‘kBtu/h’ units
Model Type
C : Cooling Only H : Heat Pump W: Inverter Heat Pump
R410A Single A Outdoor Unit
3.2 Outdoor Unit(Global)
3. Nomenclature
3.1 Indoor Unit(Global)
Serial number
Function
A : Basic H : High Efficiency
Look
Chassis name only for High Static Duct
Chassis name
Electrical rating
G : 220~240/50,60/1
Nominal Capacity
Ex) 85,000 Btu/h Class →‘85’
Model type
W : DC Inverter H/P
A*N : Indoor units using R410A
* Indicates Product type
T : Ceiling Cassette Air Conditioner
B : Ceiling Concealed Duct Air Conditioner
V : Ceiling Suspended Air Conditioner
ABN W G85 9BA0

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 1 General Information
Serial number
N : Indoor Unit
Nominal Capacity
Ex) 85,000 Btu/h Class → ‘85’
Product type
T : Ceiling Cassette Air Conditioner
B : Ceiling Concealed Duct Air Conditioner
V : Ceiling Suspended Air Conditioner
Connectable Outdoor unit type
U : Indoor units only for Single A systems
Chassis name
BU N 9 485
3.3 Indoor Unit(Europe)
3.4 Outdoor Unit(Europe)
U U 8 5 W U7 4
Cooling capacity (kBtu/h)
Type
U : Outdoor units
Model type
U : Universal model
Model type
Serial number
Outdoor unit chassis name
W : Inverter

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2 Functions & Controls
Part 2 Functions & Controls
1. List of Functions & Accessory ......................................................................................11
2. Installation Functions ....................................................................................................13
2.1 E.S.P. (External Static Pressure) Setting ....................................................................13
3. Reliability ........................................................................................................................16
3.1 Hot start.......................................................................................................................16
3.2 Self-diagnosis Function...............................................................................................16
3.3 Soft dry operation........................................................................................................16
4. Convenience Functions & Controls .............................................................................17
4.1 Cooling & heating Operations .....................................................................................17
4.2 Auto changeover operation .........................................................................................18
4.3 Auto restart Opeartion.................................................................................................18
4.4 Child Lock Function.....................................................................................................19
4.5 Forced operation .........................................................................................................19
4.6 Group Control..............................................................................................................20
4.7 Sleep Timer Operation ................................................................................................21
4.8 Timer(On/Off) ..............................................................................................................21
4.9 Weekly Program..........................................................................................................22
4.10 Two Thermistor Control.............................................................................................24
5. Special Function & KIT ..................................................................................................25
5.1 Low Ambient control....................................................................................................25

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
1. List of Functions & Accessory
1. Ceiling Concealed Duct - High static pressure
Part 2 Functions & Controls
Note
1. * : These functions need to connect the wired remote controller.
2. ** : Auto Changeover function can be operated when connected with Single A.
Auto Operation function can be operated whne connected with Mutli F/FDX.
3. Group control, Dry Contact, Auto Changeover functions are not available for units which are connected with synchro models.
O : Applied X : Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.
Category Functions ABNW85GB9A0 [UB85 N94], ABNW70GB9A0 [UB70 N94]
Air flow
Air supply outlet 1
Airflow direction control (left & right) X
Airflow direction control (up & down) X
Auto swing (left & right) X
Auto swing (up & down) X
Airflow steps (fan/cool/heat) 3 / 3 / 3
Chaos wind(auto wind) X
Jet cool/heat X / X
Swirl wind X
Air purifying
Triple filter (Deodorizing) X
Plasma air purifier X
Allergy Safe filter X
Long-life prefilter (washable / anti-fungus) O
Installation
Drain pump ABDP9
E.S.P. control* O
Electric heater X
High ceiling operation* X
Auto Elevation Grille* X
Reliability
Hot start O
Self diagnosis O
Soft dry operation O
Convenience
Auto changeover** O
Auto cleaning X
Auto operation(artificial intelligence)** O
Auto Restart O
Child lock* O
Forced operation X
Group control* O
Sleep mode X
Timer(on/off) O
Timer(weekly)* O
Two thermistor control* O
Individual
control
Standard Wired remote controller O
Deluxe wired remote controller X
Simple wired remote controller X
Simple Wired remote controller(for hotel use) X
Wireless remote controller PQWRHQ0FDB
Network
function
General central controller (Non LGAP) X
Network Solution(LGAP) O
Dry contact PQDSA(1)/PQDSB(1) / PQDSBC
PI 485(for Indoor Unit) X
Special
function kit
Zone controller ABZCA
CTI(Communication transfer interface) X
Electronic thermostat X
Others
Remote temperature sensor PQRSTA0
Group control wrie PZCWRCG3
Telecom shelter controller X

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2 Functions & Controls
2. Outdoor
DC Inverter High Efficiency model (3Ø)
Category Functions
Reliability
Defrost / Deicing O
High pressure switch X
Low pressure switch X
Phase protection O
Restart delay (3-minutes) O
Self diagnosis O
Soft start O
Test function X
Convenience Night Silent Operation O
Network function Network solution(LGAP) O
Device
Central
Controller
AC Ez
AC Smart ll
Option Kit (SD card type)
ACP(Advanced Control Platform)
AC Manager
PI485
DO(Digital Output) Kit
BNU (Building
Network Unit)
LONWORKS Gateway
BACnet Gateway
Installation
Y branch
Header branch
Air Guide
ODU Dry Contact
Low Ambient Kit
[Note]
• O: Applied, • X: Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate
package.
PQCSZ250S0
PQCSW320A1E
PQCSE341A0 / PQCSE342A0
PQCPA11A0E / PQCPB11A0E
PQCSS520A0E
PMNFP14A0/PMNFP14A1
PQNFP00T0
PQNFB16A1
PQNFB17B0
X
X
X
O (On/off control)
O (Logical operation)
AUUW85LAE
[UU85W U74]
AUUW70LAE
[UU70W U34]
AUUW85LAE
[UU85W U74]
AUUW70LAE
[UU70W U34]

2.1 E.S.P. (External Static Pressure) Setting
2. Installation Functions
If entering into ESP setup mode by using
button, it indicates as the picture
below.
2
Select ESP fan step by
pressing button.
(01: very low, 02: low, 03:
medium, 04: high, 05:
very high)
3
Move to ESP value setting by pressing
button.
(It is 000 when delivering
from the warehouse.)
4
Press button to setup ESP value.
(It is possible to setup ESP
value from 1 to 255, and 1 is
the smallest and 255 is the
biggest.)
5
If pressing button long for 3
seconds, it enters into remote
controller setter setup mode.
- If pressing once shortly, it enters
into user setup mode. Please press
more than 3 seconds for sure.
1
Function Code ESP value
ESP step
Press button to save.
7
Select ESP fan step again by using
button and setup ESP value, as No. 4
and 5, that corresponds each wind flow
6
Press button to exit.
❈After setup, it automatically gets out of
setup mode if there is no button input
for 25 seconds.
❈When exiting without pressing set
button, the manipulated value is not
reflected.
8
Function code,
ESP code
ESP value
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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2 Functions & Controls
This is the function that decides the strength of the wind for each wind level and because this function is to make the instal-
lation easier.
• If you set ESP incorrectly, the air conditioner may malfunction.
• This setting must be carried out by a certificated-technician.
How to Set E.S.P. on the remote controller?
• When setting ESP value on the product without very weak wind or power wind function, it may not work.
• Please be careful not to change the ESP value for each fan step.
• It does not work to setup ESP value for very low/power step for some products.
• ESP value is available for specific range belongs to the product.

Part 2 Functions & Controls
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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
- Static Pressure (Code 06) setting will not be used if Static Pressure Step (Code 32) setting is being
used.
- For the static pressure value for each step, refer to the next page Table. 1
When pressing the button and
button simultaneously for more than 3
seconds, the system will be entered into the
installer setting mode.
- After entering into the installer setting
mode, select the static pressure step
setting code value by pressing the
button.
* Static pressure step setting code value : 32
1
Select the desired setting value with the
temperature up(s), down(t) button.
2
When pressing button, currently
established static pressure value will be set
up.
3
When pressing the button and
button simultaneously for more than 3
seconds after the setting has been completed,
the setting mode will be released.
- If there isn’t any button input for more than
25 seconds, the installer setting mode will
also be released.
4
OPER
MODE
OPER
MODE
OPER
MODE
00: use static pressure (code 06) set value
01~ 11: static pressure step (code 32) set value
Function Code Existing condition
This function is applied to only duct type. Setting this in other cases will cause malfunction.
This function is only available on some products.
This is the function that static pressure of the product is divided in 11 steps for setting.
Installer Setting - Static Pressure Step Setting

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
E.S.P. setting value (reference)
Table 1
NOTE
1. Be sure to set the value refering table 1. Unexpected set value will cause mal-function.
2. Table 1 is based at 230V. According to the fluctuation of voltage, air flow rate varies.
3. Factory Set(External Static Pressure) each Model
* If it is zero static pressure, please set value below Maximum value.
Model Step CMM
Static Pressure[mmAq(Pa)]
Setting Value
ABNW85GB9A0
[UB85 N94]
LOW 64
MID 72
HIGH 80
Model Maximum value
ABNW85GB9A0
[UB85 N94]
ABNW70GB9A0
[UB70.N94]
105
Model Factory set (E.S.P.) mmAq(Pa)
ABNW85GB9A0
[UB85 N94]
ABNW70GB9A0
[UB70.N94]
13 (127)
6(59) 7(69) 8(78) 9(88) 10(98) 12(118) 13(127) 14(137) 15(147) 16(157) 18(176)
32:01 32:02 32:03 32:04 32:05 32:06 32:07 32:08 32:09 32:10 32:11
74 75 76 78 79 82 84 86 89 91 95
78 79 80 82 83 87 89 91 94 96 100
82 84 86 88 90 93 95 97 100 101 105
Model Step CMM
Static Pressure[mmAq(Pa)]
Setting Value
ABNW70GB9A0
[UB70 N94]
LOW 60
MID 65
HIGH 70
6(59) 7(69) 8(78) 9(88) 10(98) 12(118) 13(127) 14(137) 15(147) 16(157) 18(176)
32:01 32:02 32:03 32:04 32:05 32:06 32:07 32:08 32:09 32:10 32:11
70 72 74 76 78 81 82 85 86 88 91
74 76 78 80 82 85 86 89 90 92 95
78 80 82 84 86 90 91 93 94 96 99

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Copyright ©2014 LG Electronics. Inc. All right reserved.
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Part 2 Functions & Controls
3.1 Hot start
• When heating is started, the indoor fan is stopped or very slow to prevent the cold air carry out
• When the temp. of heat exchanger reach 30°C(model by model), indoor fan is started.
3.2 Self-diagnosis Function
• The air conditioner installed can self-diagnosed its error status and then transmits the result to the central control.
Therefore, a rapid countermeasure against failure of the air conditioner allows easy management and increases the
usage life of air conditioner.
• Refer to trouble shooting guide.
3.3 Soft dry operation
• When the dehumidification operation input by the remote control is received, the intake air temperature is detected and
the setting temp is automatically set according to the intake air temperature.
• While compressor off, the indoor fan repeats low airflow speed and stop.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification opera-
tion and 4-min compressor off repeat.
Compressor ON Temp. ➔Setting Temp+0.5°C
Compressor OFF Temp. ➔Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
3. Reliability
Intake air Temp. Setting Temp.
26°C ≤ intake air temp. 25°C
24°C ≤ intake air temp.< 26°C intake air temp. -1°C
22°C ≤ intake air temp. < 24°C intake air temp. -0.5°C
18°C ≤ intake air temp. < 22°C intake air temp.
intake air temp. < 18°C 18°C

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Copyright ©2014 LG Electronics. Inc. All right reserved.
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4.1 Cooling & heating Operations
4.1.1 Cooling Mode
• Operating frequency of compressor depends on the load condition, like the difference between the room temp. and
the set temp., frequency restrictions.
• If the compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30
seconds. ( not emergency conditions)
• Compressor turned off when
- intake air temperature is in between ±0.5°C of the setting temp. limit for three minutes continuously.
- intake air temperature reaches below 1.0°C of the temperature of setting temp..
• Compressors three minutes time delay.
- After compressor off, the compressor can restart minimum 3 minutes later.
4. Convenience Functions & Controls
4.1.2 Heating Mode
• Operating frequency of compressor depend on the load condition, The difference between the room temp. and set
temp., frequency restrictions.
• If compressor operates at some frequency, the operating frequency of compressor cannot be changed within 30 sec-
onds.
• Condition of compressor turned off
- When intake air temperature reaches +4°C above the setting temperature.
• Condition of compressor turned on
- When intake air temperature reaches +2°C above the setting temperature.
* Condition of indoor fan turned off
- While in compressor on : indoor pipe temp. < 20°C
- While in compressor off : indoor pipe temp. < 30°C
• While in defrost control, between the indoor and outdoor fans are turned off.
• Compressor 2minutes delay
- After compressor off, the compressor can restart minimum 2 minutes later.
CST/Duct/CVT type indoor unit matched with
Universal Outdoor unit
CST/ Duct/CVT type indoor unit
matched with Single Outdoor unit/Multi
Outdoor unit/Multi V Outdoor unit
Thermo ON : +2 °C above setting temp.
Thermo OFF : +4 °C above setting temp.
Thermo ON : Setting temp.
Thermo OFF : +3 °C above setting temp.
NOTE: Some Models are different by temperature of thermo ON/OFF.
Part 2 Functions & Controls

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2 Functions & Controls
4.3 Auto restart Operation
• Whenever there is electricity failure to the unit, and after resumption of the power, unit will start in the same mode prior
to the power failure. Memorized condition are on / off condition, operating mode (cooling/ heating), set temperature and
fan speed. The unit will memorize the above conditions and start with same memorized condition.
4.2 Auto changeover operation
• The air conditioner changes the operation mode automatically to keep indoor temperature.
• When room temperature vary over ±2°C with respect to setting temperature, air conditioner keeps the room tempera-
ture in ±2°C with respect to setting temperature by auto change mode.
SET Temp.
+0.5°C
-0.5°C
-2°C
+4°C
+2°C
Cooling
operation
Heating operation Cooling
operation
Cooling thermo off
Heating thermo off
Switching point
Switching point

4.4 Child Lock Function
4.5 Forced operation
• To operate the appliance by force in case when the remote control is lost, the forced operation selection switch is on
the main unit of the appliance, and operate the appliance in the standard conditions.
• The operating condition is set according to the outdoor temp. and intake air temperature as follows.
• The unit select the last operation mode in 3 hours.
• Operating procedures when the remote control can't be used is as follows :
- The operation will be started if the ON/OFF button is pressed.
- If you want to stop operation, re-press the button.
Indoor temp.
over 24°C
21~24°C
below 21°C
Setting temp.
22°C
23°C
24°C
Setting speed of
indoor fan
High speed
Operating Mode
Cooling
Healthy Dehumidification
Heating
It is the function to use preventing children or others from careless using.
Press button repeatedly until
the is flashing.
1
If moving to 'setup' icon area by using button,
'setup' icon blinks, and child lock function is setup if
pressing button at that time.
2
When cancelling lock function, if moving to 'cancel' icon by pressing
button and then, pressing button, child lock function is
cancelled.
3
Press button to exit.
❈After setup, it automatically gets out of setup mode if there is no
button input for 25 seconds.
❈When exiting without pressing set button, the manipulated value is
not reflected.
4
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Copyright ©2014 LG Electronics. Inc. All right reserved.
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Part 2 Functions & Controls

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Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes LGE Internal Use Only
Part 2 Functions & Controls
4.6 Group Control
GND
GND
12V
Signal wire
Signal wire
GND
12V
B Y R B Y R
MASTER SLAVE
Signal wire GND
12V
Signal wire
1. When installing more than 2 units of air conditioner to
one wired remote controller, please connect as the
right figure.
• If it is not event communication indoor unit, set the unit
as slave.
• Check for event communication through the product
manual.
2. When installing more than 2 wired remote controllers to one
air conditioner, please connect as the right picture.
• When installing more than 2 units of wired remote controller to one
air conditioner, set one wired remote controller as master and the
others all as slaves, as shown in the right picture.
• You cannot control the group as shown in the right for some prod-
ucts.
•
Refer to the product manual for more detail.
When controlling multiple indoor units with event communication function with one remote controller, you must change the
master/slave setting from the indoor unit.
- Indoor units, the master/slave configuration of the product after completion of indoor unit power ‘OFF’ and then ‘ON’ the
power after 1 minutes elapsed sign up.
- For ceiling type cassette and duct product group, change the switch setting of the indoor PCB.
- For wall-mount type and stand type product, change the master/slave setting with the wireless remote controller. (Refer to
wireless remote controller manual for detail)
❈When installing 2 remote controllers to one indoor unit with event communication function, set the master/slave of the
remote controller. (Refer to remote controller master/slave selection)
When controlling the group, some functions excluding basic operation setting, fan level Min/Mid/Max, remote controller
lock setting and time setting may be limited.
<When simultaneously connecting
2 sets of wired remote controller>
• When controlling in groups, set the master/slaver of the remote controller. Refer to Installer setting section on how to set mas-
ter/slave for more detail.
12345678 12345678
#3 switch OFF: Master
(Factory default setting)
#3 switch ON: Slave