ENGLISH ITALIANO ESPAÑOL FRANÇAIS DEUTSCH INSTALLATION MANUAL • 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. TYPE : Dry contact for communication Model : PQDSBCGCD0 P/NO : MFL42540218 www.lg.
Dry contact for communication Installation manual TABLE OF CONTENTS n Safety Precautions .............................................................3~4 n Name of each part ..................................................................5 n Installation Method .............................................................6~7 Installation inside of the indoor unit..........................................................6 Installation outside of the indoor unit ............................................
Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. n Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury. CAUTION This symbol indicates the possibility of injury or damage. n Meanings of symbols used in this manual are as shown below. Be sure not to do.
Safety Precautions n 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. Do not use any flaming devices near the product. • It can cause a fire. 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. er e rvic Se Do not give impact to the product.
Name of each part ENGLISH Name of each part (Rear case) (Front case) 4 5 3 6 7 12 10 11 9 1 (Top) 2 8 (Internal PCB board) (Side) (Side) DRY CONTACT FOR COMMUNICATION 1. CN_INDOOR : Connector for indoor unit 2. CN_PI485 : PI485 connector 3. CHANGEOVER_SW : Switch to select External Voltage or Non Voltage for input contact signal 4. CN_CONTROL : Contact point signal input 5. CN_COM : Signal input for communication 6. CONTROLMODE_SW : Switch to select the control mode 7.
Installation Method Installation Method Installation inside of the indoor unit ① Loose 3 screws anchoring PCB and then separate PCB from the rear case ② Connect the connection wires according to the instructions. (Please refer to Setting and Using Method) ③ Perform the switch setting according to switch setting method. (Please refer to Setting and Using Method) ④ Fix PCB on suitable space inside of the indoor unit. 1. Install the product on flat surface and screw at least 2 places.
Installation Method ENGLISH Installation outside of the indoor unit ① Screw the rear case on the installation surface using screws. ② Please cut the pole which is located in side of the front case properly. ③ Connect connection wires according to the instructions. (Reference to Setting and Using Method) Then, connect wire to PCB after going through hole of ②. ④ Perform the switch setting according to switch setting method.
Setting and using method Setting and using method After change any Dry contact setting, then you must press RESET switch to reflect the setting. 1.
Setting and using method ENGLISH 2.
Setting and using method n When using communication signal input BUS B BUS A Room Control Unit 10 Dry contact for communication LG does not supply this section (Field supply)
Setting and using method ENGLISH 3. Setting of ʻTEMP_SWʼ n When setting the desired temperature of the Dry contact : When operating the indoor unit, set the desired temperature according to the TEMP_SW setting.
Setting and using method 4. Setting of ʻCONTROLMODE_SWʼ n Use the CONTROLMODE_SW to set a control mode for contact signal input CONTROLMODE_SW Notes • Indoor unit control priority Central control > Dry contact > Wired/Wireless remote controller, indoor unit button • Dry contact controls the indoor unit according to the applicable mode when there is a change in input of A and B.
Setting and using method ENGLISH 2) General mode CONTROL_ MODE S/W 1 2 3 4 5 6 Input A Input B Operating mode OFF OFF Indoor unit stopped, locked ON OFF Indoor unit prior operating condition maintained, unlocked OFF ON Indoor unit stopped, locked ON ON Indoor unit stopped, locked OFF OFF Indoor unit stopped, locked ON OFF Indoor unit operating, unlocked OFF ON Indoor unit stopped, locked ON ON Indoor unit stopped, locked OFF OFF Indoor unit stopped, locked ON OFF Indo
Setting and using method 3) Fan level setting mode CONTROL_ MODE S/W Input A Input B OFF OFF Indoor unit operating at low level, locked ON OFF Indoor unit operating at low level, unlocked OFF ON Indoor unit stopped, locked ON ON Indoor unit stopped, locked OFF OFF Indoor unit operating at low level, locked ON OFF Indoor unit operating at low level, unlocked OFF ON Indoor unit stopped, locked ON ON Indoor unit prior operating condition maintained, unlocked 7 8 Operating mode No
Setting and using method ENGLISH 5) Compressor stop mode CONTROL_ MODE S/W Input A Input B OFF OFF Indoor unit operating (Compressor in stop mode), locked ON OFF Indoor unit prior operating condition maintained (Compressor not in stop mode), unlocked OFF ON Indoor unit stopped, locked ON ON Indoor unit stopped, locked B Operating mode Notes • Compressor stop mode: The compressor is stopped during cool/heat operation.
n Use the CONTROLMODE_SW to set a control mode for communication signal input CONTROL_ MODE S/W E Input A Input B Operating mode OFF OFF ON OFF The Dry contact ignores a contact signal OFF ON Only operates by communication signal input from RCU ON ON Notes Once the Dry contact has been set E mode, • TEMP_SW is used to set the address of Dry contact (00~0F).
Setting and using method ENGLISH 5. Indoor unit monitoring n Monitoring whether the indoor unit is operating: Refer to below and connect to the control device that you want to control. Field Supply Power AC or DC Operation Display (Depends on Operation display power type) n Monitoring indoor unit error: Refer to below and connect to the control device that you want to control.
Memo 18 Dry contact for communication
