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Dry contact for communication Owner's & installation manual Models: PQDSBC Visit us at : http://www.lgservice.com 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. •...
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.
Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING CAUTION I Meanings of symbols used in this manual are as shown below.
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Safety Precautions I During use Do not modify or extend 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.
Name of each part (Front case) (Top) (Side) DRY CONTACT FOR COMMUNICATION (DRY_CONTACT FOR COMMUNICATION) 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.
Installation Method 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.
Installation outside of the indoor unit Anchor the rear case of Dry Contact for communication on the installation surface at holes using anchor screws. Please cut the pole which is located in side of the front case properly. Connect connection wires according to the instructions.
Setting and using method Setting and using method You must press the RESET switch when you are completed with all the settings to reflect the settings. 1. Power supply and indoor unit connection I When using the Dry contact for communication independently Indoor unit I When using with the central controller (Only when the indoor unit PCB is a non-communication model)
2. Setting of Contact Signal Input I For no power contact point signal input I For power contact point signal input Setting and using method LG does not supply this section (Local supply) LG does not supply this section (Local supply)
Setting and using method 3. Setting the desired temperature I 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.
4. Control mode setting I Use the CONTROL_MODE_SW to set the control mode you want from 0~D. CONTROL_MODE_SW ➲ Indoor control priority Central control > Dry contact for communication > Wired/Wireless remote controller, indoor unit button ➲ Dry contact for communication controls the indoor unit according to the applicable mode when there is a change in input of A and B.
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Setting and using method 2) General mode CONTROL_ Input A MODE S/W 12 Dry contact for communication Input B Indoor unit stopped, locked Indoor unit prior operating condition maintained, unlocked Indoor unit stopped, locked Indoor unit stopped, locked Indoor unit stopped, locked Indoor unit operating, unlocked Indoor unit stopped, locked Indoor unit stopped, locked...
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3) Fan level setting mode CONTROL_ Input A MODE S/W ➲ When the indoor unit is operating in Dry contact for communication, the fan level can be changed by other controller when the fan level is set to low level and the indoor is in unlocked condition. 4) Power save mode CONTROL_ Input A...
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Setting and using method 5) Compressor stop mode CONTROL_ Input A MODE S/W ➲ Compressor stop mode: The compressor is stopped during cool/heat operation. 6) Operating mode selection mode CONTROL_ Input A MODE S/W ➲ Power save mode: Adjust the set temperature to +3°C for cooling and -3°C for heating. 14 Dry contact for communication Input B Indoor unit operating (Compressor in stop mode), locked...
5. Indoor unit monitoring I Monitoring whether the indoor unit is operating: Refer to below and connect to the control device that you want to control. I Monitoring indoor unit error: Refer to below and connect to the control device that you want to control. Local Supply Operation Display (Depends on Operation...
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P/No.: MFL42540202 Printed in Korea After reading this manual, keep it in a place easily accessible to the user for future reference.