LG
Dry Contact
INSTALLATION MANUAL
LG
IMPORTANT
• Please read this installation 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.
Visit us at : http://www.lgservice.com
Models: PQDSA
PQDSB
ENGLISH
Dry Contact Unit Installation Manual
TABLE OF CONTENTS
■ Safety Precautions
■ Overview
■ Part Description
■ Installation Guide
■ Step 1
■ Step 2
■ Administrator Guide
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3~4
5
7
9
9
10
11
2 Dry Contact
Safety Precautions
WARNING
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.
WARNING
CAUTION
■ Meanings of symbols used in this manual are as shown below.
■ Installation
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.
ENGLISH
Don't touch with the
hands while the power is
on
•
There is risk of fire or electric
shock.
Use standard
parts(connector).
•
Do not disassemble or repair
the product. There is risk of fire
or electric shock.
For electrical work, contact
the dealer, seller, a qualified
electrician, or an Authorized
Service Center.
•
Do not disassemble or repair
the product. There is risk of fire
or electric shock.
Installation Manual 3
Safety Precautions
Use the correctly rated
breaker or fuse.
Do not install, remove, or reinstall the unit by yourself
(customer).
• There is risk of fire or electric
shock.
• There is risk of fire, electric
shock, explosion, or injury.
■ Operation
When the product is soaked (flooded or
submerged), contact an Authorized Service
Center.
• There is risk of fire or electric shock.
For installation, always
contact the dealer or an
Authorized Service Center.
• There is risk of fire, electric
shock, explosion, or injury.
Be cautious that water could not enter the
product.
• There is risk of fire, electric shock, or product
damage.
4 Dry Contact
Overview
Overview
LG Dry Contact is a solution for automatic control of air conditioning system at the owner’s behest.
In simple words, it’s a switch which can be used to turn the unit On/Off after getting the signal from external
sources like key-in lock, door or window switch etc specially used in Hotel rooms.
It’s a small PCB that either can be fit inside the control box of Indoor unit or can be outside the unit in a plastic case
if there is no sufficient space inside the Indoor unit.
Apart from simple installation, it can also be linked to Central Controller via Indoor unit PI485 pcb. For this, all
connecting wires & an additional small pcb for looping is also provided along with Dry Contact.
Dry Contact can be used in two ways.
1. It can be used to actually turn On/Off the system on receiving the signal from the source.
In this case, user doesn't need to use remote controller anymore to turn On/Off the system.
However all the further settings like temperature, fan speed, mode etc can be done through remote controller
only.
2. Other way is almost similar as above but in this case, after getting the On signal from the external source, user
has to turn On the system from remote controller only. Dry contact just activates the system.
However system can be turned Off directly from the external source. So only On mode is different here.
So in both of above conditions, system can’t be operated without signal from external source which prevents
unnecessary use of system & facilitates its operation only when its required.
These settings can be selected from the remote controller whose details have been explained in the later part of
this manual
So depending upon the requirement, Dry Contact offers a variety of applications to suit the customer’s requirement
in the best possible way.
ENGLISH
Installation Manual 5
Overview
Power
Connector
Indoor PCB
Connector
Dry Contact Controller
Connector
6 Dry Contact
Part Description
1
2
3 4 5 6
DRY CONTACT UNIT
LG
[Top case]
[Side]
[Bottom case]
[Side]
[ PCB ]
[Side]
1
2
3
4
5
6
Part Description
PQDSA (Only PCB)
PQDSB (PCB + Case)
CN-POWER : AC 220V Connector
CN-CC : Indoor PCB Connector
CN_DRY (L) : DRY CONTROLLER Connector
CN_DRY ( SIG ) : DRY CONTROLLER Connector
CN_DRY (ERROR CHECK) : ERROR Check Display Connector
CN_DRY( OPER STATE): Operation Display Connector
ENGLISH
Installation Manual 7
Part Description
Accessory
Cable 1EA
(for Central controller)
Cable 1EA
(for connecting with indoor unit)
*Note
• These cable using for connection between Dry
contact and Indoor unit.
• So before using these things Please check the
connector type first and use cables on proper indoor
unit.
Connecting PCB
(6871A30056A)
*for Central Controller
Dry contact
(For installation, 4EA)
Dry contact - 4EA
(For assembly the case)
User/Installation
Manual
8 Dry Contact
Installation Guide
Installation Guide
Step 1
Connect CN-CC with Indoor PCB by the cable(provided)
- Connection of Dry contact only
Connection PCB
(6871A30056A)
SWITCH
L1 2 3 4
ON
C03Y
DRY CONTACT
PCB
C01A
IC01A
OSC01B
L02D
L01D
U02YU04YU03Y
LED1
LED01G
LED02G
LED03G
CN_COMM
ZNR01Y
C04Y
4
4
3
3
2
2
1 1
221
1
AC 220V
DRY CONTACT
PCB
PI485 PCB : Special purchase for
Central Control
(Ex : PHNFP14A0 or PSNFP14A0...)
4
3
2
1 1
221
1
AC 220V
Indoor
PCB
CN-CC CN-CC
- Connection of Dry contact & LG Central Controller in case of single constant models.
Indoor
PCB
CN-CC CN-CC
BR1
S1
TANS01Y
* Single Only
- When you install single product this PCB have to add.
ENGLISH
4
3
2
Installation Manual 9
Installation Guide
Step 2
Connect CN_DRY with Control Unit .
(Fix SUB PCB into the proper location.)
- To apply power source through PCB
DRY CONTACT
PCB
CN-CC
- To apply power source directly to external source
DRY CONTACT
CN-CC
RY1
PCB
RY1
RY2
CN_DRY
L
N
221
1
INPUT
AC 220V
RY2
CN_DRY
L
N
221
1
4
3
2
1 1
4
3
2
1 1
4
3
2
4
3
2
Operation Display
Error Check Display
Dry contact
Controller
LG does not
supply this section
Operation Display
Error Check Display
Dry contact
Controller
AC 220V
10 Dry Contact
LG does not
supply this section
Administrator Guide
Administrator Guide
* Function
It gives selection whether to turn ON the unit directly or not from the external source.
The selection can be made by pressing CANCEL button of the wireless remote controller
3 times within 3 minutes of resetting the unit with facing it towards the unit.
(This function availability depends on indoor unit model)
ENGLISH
CANCEL
CANCEL Button
SET
ON
OFF
AUTO CLEAN
ON OFF
SET
CANCEL
PLASMA
1. To turn ON the unit directly from the external source
2. Not to turn ON the unit directly from the external source.
Only to activate the system.
If the power gives out, the Air conditioner may be run to before state after
power returns because Air conditioner's function of interruption of electric
power compensation.
Installation Manual 11
P/No.: 3828A20494A
After reading this manual, keep it in a place easily accessible to the user for future reference.
Printed in Korea
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