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LG
Dry contact for communication
Owner's & installation manual
LG
IMPORTANT
• Please read this manual completely before
installing the product.
• Installation work must be performed in
accordance with the national wiring standards
by authorized personnel only.
• Please retain this installation manual for future
reference after reading it thoroughly.
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Models: PQDSBC
2Dry contact for communication
Dry contact for communication Owner’s &installation manual
TABLE OF CONTENTS
■Safety Precautions .............................................................3~4
■Name of each part..................................................................5
■Installation Method .............................................................6~7
Installation inside of the indoor unit..........................................................6
Installation outside of the indoor unit .......................................................7
■Setting and using method ................................................8~18
1. Power supply and indoor unit connection............................................8
2. Setting of Contact Signal Input ............................................................9
3. Setting the desired temperature ........................................................10
4. Control mode setting..........................................................................11
5. Indoor unit monitoring ........................................................................15
Safety Precautions
Owner’s & installation manual 3
Do not touch the board
when the power is
connected.
•
It can cause a fire, electric
shock, explosion, injury and
problem to the product.
Always request for
installation of the product
to the service center or
the installation service
provider.
•
It can cause a fire, electric
shock, explosion and injury.
When reinstalling the
previously installed product,
request for service to the
service center or the
installation service provider.
•
It can cause a fire, electric
shock, explosion and injury.
■During installation
Service center
Service center
Do not install the product where it can
be exposed to rain.
•
It can cause problems to the product.
Do not install the product in a humid
location.
•
It can cause problems to the product.
Safety Precautions
To prevent injury to the user or other people and property damage, the following instructions
must be followed.
■Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is
classified by the following indications.
■Meanings of symbols used in this manual are as shown below.
WARNING
CAUTION
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage.
Be sure not to do.
Be sure to follow the instruction.
WARNING
Safety Precautions
4Dry contact for communication
■During use
Do not modify or extend the
power cord.
• It can cause a fire and
electric shock.
Do not use any flaming
devices near the product.
• It can cause a fire.
Do not use any heating
devices near the power cord.
• It can cause a fire and
electric shock.
Do not pour water inside the
product.
• It can cause an electric
shock and problem to the
product.
When the product is
submersed in water, always
request for service to the
service center or the
installation service provider.
• It can cause a fire and
electric shock.
Make the children and the
elderly use the product with
the help of a guardian.
• It can cause a safety
accident and problems to the
product.
Do not give impact to the
product.
• It can cause problems to the
product.
Service center
Name of each part
Owner’s & installation manual 5
Name of each part
1. CN_INDOOR : Connect communication wire between indoor unit and Dry contact for communication
and supply power to Dry contact for communication
2. CN_PI485 : PI485 connector
3. CHANGE_OVER_SW : Switch to select voltage (5V-12V) of contact point
4. CN_CONTROL : Contact point signal input
5. CONTROL_MODE_SW : Switch to select the control mode
6. SETTING_SW : Switch to select whether to use set function of Dry contact for communication
7. TEMP_SETTING : Switch to set the desired temperature of the indoor unit
8. CN_OUT (O1, O2) : Connector to show whether the indoor unit is operating
9. CN_OUT (E3, E4) : Connector to show whether there is an error with the indoor unit
10. DISPLAY_LED : LED to display the status of the Dry contact for communication
11. RESET_SW : Reset switch
DRY CONTACT FOR COMMUNICATION (DRY_CONTACT FOR COMMUNICATION)
NOT
USB
e
CN_OUT
CHANGE
OVER_SW
VOLT NON
VOLT
TEMP
SETTING
(Front case) (Rear case)
(Top)
(Internal PCB board)
(Side) (Side)
1
2
5
89
7
3
6
11
10
4
Installation Method
6Dry contact for communication
Installation Method
Installation inside of the indoor unit
Loose 4 screws anchoring PCB and then separate the rear case and PCB
Connect the connection wires according to the instructions. (Please refer to Setting and Using
Method)
Perform the switch setting according to switch setting method. (Please refer to Setting and Using
Method)
Fix PCB on suitable space inside of the indoor unit.
1. Install the product on flat surface and install anchoring screws at more than 2 places. Otherwise
the central controller may not be anchored properly.
2. Do not tighten anchoring screws too tightly. It may cause deformation of the case.
3. Do not deform the case at random. It may cause malfunction of the central controller.
Installation Method
Owner’s & installation manual 7
Installation outside of the indoor unit
Anchor the rear case of Dry Contact for
communication on the installation surface at
holes using anchor screws.
Connect connection wires according to the
instructions.
(Reference to Setting and Using Method)
Then, connect wire to PCB after going
through hole of .
Join the front case and the rear case, anchor
the front case at holes using anchor screws.
Please cut the pole which is located in side of the front case properly.
Perform the switch setting according to switch setting method. (Reference to Setting and Using Method)
DRY CONTACT UNIT
1. Install the product on flat surface and install anchoring screws at more than 2 places. Otherwise
the central controller may not be anchored properly.
2. Do not tighten anchoring screws too tightly. It may cause deformation of the case.
3. Do not deform the case at random. It may cause malfunction of the central controller.
Setting and using method
Setting and using method
8Dry contact for communication
1. Power supply and indoor unit connection
You must press the RESET switch when you are completed with all the settings to reflect the
settings.
■
When using the Dry contact for communication independently
■When using with the central controller (Only when the indoor
unit PCB is a non-communication model)
Indoor unit
PCB
Indoor unit
PCB
PI485: Connect to central controller
CN_PI485
CN_INDOOR
CN_INDOOR
CN_INDOORCN_INDOOR
Setting and using method
Owner’s & installation manual 9
2. Setting of Contact Signal Input
■For no power contact point signal input
■For power contact point signal input
LG does not
supply this section
(Local supply)
LG does not
supply this section
(Local supply)
Setting and using method
10 Dry contact for communication
3. Setting the desired temperature
■When setting the desired temperature of the Dry contact for
communication
: When operating the indoor unit, set the desired temperature according to the TEMP_SW setting.
When the indoor unit is unlocked, the desired temperature can be reset by other controller
1) Turn on the TEMP_SETTING switch of SETTING_SW.
2) Use the TEMP_SW to set the temperature as shown below.
■When not using the desired temperature setting of Dry
contact for communication
1) Turn off the TEMP_SETTING switch of SETTING_SW.
➲When operating the indoor unit initially in Dry contact for communication, set the desired
temperature to 18°C.
SETTING_SW
SETTING_SW
01234567
18 19 20 21 22 23 24 25
Desired temperature setting table
TEMP SW
setting
Temperature
setting(°C)
89ABCDEF
26 27 28 29 30 30 30 30
TEMP SW
setting
Temperature
setting(°C)
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