LESITE LST900 Manual 

and keep it for future reference. This machine adopts an advanced hot wedge structure,which has better heating efficiency and faster welding speed.It specially for welding 1.0mm-3.0mm HDPE、LDPE、PP、TPO、PVC Application Precautions - Solid Waste Lanfills - Chemical Mining - Sewage Treatment - Water Conservancy - Anti-seepage Project - Aquacuture Please confirm that the machine is turned off and unplugged before disassembling the welding machine, so as not to be injured by live wires or components inside the machine. The welding machine generates high temperature and high heat, which may cause fire or explosion when used incorrectly, especially when it is close to combustible materials or explosive gas. Please do not touch the hot wedge (during welding work or when the welding machine has not completely cooled down) so as not to burn. The power supply voltage must match the rated voltage marked on the welding machine and be reliably grounded. Connect the welding machine to a socket with a protective ground conductor. In order to ensure the safety of the operators and the reliable operation of the equipment, the power supply at the construction site must be equipped with a regulated power supply and a leakage protector. The welding machine must be operated under the correct control of the operator, otherwise it may cause combustion or explosion due to high temperature. It is strictly forbidden to use the welding machine in water or muddy ground, avoid soaking, rain or damp. LESITE

50 / 60 Hz 1800 W / 1650 W 1 - 5 m/min 50 - 450 ℃ 100-1000N 1.0 mm - 3.0 mm （Single Layer） 12 cm 15 mm *2 ，Interior Cavity 15mm ≥ 85 % Material 13.0 Kg Temperature CE One Year Model LST900D LST900/900D EN LESITE Rated Voltage Frequency Power Welding Speed Heating Temperature Welding Pressure Thickness Welded Overlap Width Seam Width Seam Strength Net Weight Digital Display Certificate Warranty 230 V / 120 V 50 / 60 Hz 1800 W / 1650 W 1 - 5 m/min 50 - 450 ℃ 100-1000N 1.0 mm - 3.0 mm （Single Layer） 12 cm 15 mm *2 ，Interior Cavity 15mm ≥ 85 % Material 13.0 Kg Temperature and Speed CE One Year

LST900/900D EN LESITE 1、Pressure Handle 2、Operation Handle 3、Control Box 4、 Hot Wedge 5、Pressure Roller 6、Creeping Wheel 7、Swing Head 8、Pressure Adjustment 1 2 3 4 5 6 7 8

Steps for Machine On/Off 9、Temperature Controller 10、Power Fuse 11、Power Switch 12、 Motor Fuse 13、Motor Switch 14、Voltmeter 15、 Speed Control Knob LST900/900D EN LESITE 9 11 10 14 15 13 12 1 2 3 4 5 1、Connect the power supply, lift up the pressure handle (1) and the pressure roller (5) to separate automatically, and press the power on/off switch(11) 2、Check whether the voltage value displayed on the voltmeter (14) is normal 3、Turn on the temperature controller (9), set to the temperature required for welding, and wait for the temperature to reach the preset value 4、Turn on the motor switch (13) and set the speed control knob (15) to the required figure 5、Place the welding machine and insert the membrane layers 6、Put down the pressure handle（1) ，the machine starts to move and weld 7、Keep observing the welding trail and the position of the upperlayer and lower layer sat any time to adjustincase of deviation 8、After finishing welding, lift up the pressure handle (1), and move the machine away from the welding position 9、Turn off the motor switch (13), turn off the temperature controller (9), the hot wedge stops heating 10、Turn off the power switch (11)

Press the buttons on the panel to set the required welding temperature , which depends on the weldiing material and ambient temperature. The LCD screen will display the preset temperature and the current actual temperature. 2. Welding speed： Press the buttons on the panel to set the required welding speed,which matchs the welding temperature.The LCD screen will display the preset speed and the current actual speed. 3.Motor is on： Press the motor moves ● This machine has a parameter storage memory function that the welding machine will automatically use the last parameters without resetting the parameters when the machine is turned on next time. 16、Power Switch 17、Temperature Rise Knob 18、Temperature Drop Knob 19、Speed Increase Knob 20、Speed Down Knob 21、Motor Switch 22、Power Fuse 23、Welding Temperature Display 24、Welding Speed Display 25、Motor Fuse LST900D Control Panel LST900/900D EN LESITE 16 17 18 19 20 21 22 23 24 25 CT 016°C ST - OFF CV: 0M SV: 5.0M

LST900/900D EN LESITE 4、Turn on the motor switch (21), and turn the speed knobs (19) (20) to set the required welding speed (the LCD screen displays as shown in Drawing 3.), then insert the membrane layers after placing the machine 5、Put down the pressure handle（1) ，the machine starts to move and weld 6、Keep observing the welding trail and the position of the upper layer and lower layer at any time to adjust in case of deviation 7、After finishing welding, lift up the pressure handle (1),move the machine away from the welding position 8、Turn off the motor switch（21），press the temperature rise knob （17）and the temperature drop knob at the same time（18）(As shown in drawing 4)，or turn the temprature drop knob to “OFF”，the hot wedge will stop heating 9、Turn off the power switch Current Temperature Current Temperature Preset Temperature Current Speed Drawing 1 Drawing 2 Drawing 3 Drawing 4 Preset Speed Current Speed Preset Speed Current Temperature Preset Temperature Current Speed Preset Speed Current Temperature Current Speed Preset Speed 1、Connect the power supply, lift up the pressure handle (1) and the pressure roller (5) to separate automatically 2、Turn on the power switch (16), the LCD screen displays as shown in drawing 1 While the hot wedge has not started to heat up 3、Turn the temperature rise knob (17) so the LCD screen displays as shown in drawing 2 While the hot wedge starts to heat until the actual temperature is equal to the preset temperature

LST900/900D EN LESITE Fault Screen shows nothing Power failure or low voltage Check the voltage and power wire Replace fuse 15A Power fuse has blown Power switch doesn't work Replace the power switch Speed knob can't be adjusted or the motor moves at a abnormal speed Replace the motor Motor doesn't work Drive board fuse has blown Replace the drive board fuse Replace the speed knob Speed knob doesn't work Sensor can't detect the data Drive board doesn't work Replace the drive board Replace the photo sensor board and sensor wire Hot wedge doesn't heat Replace the heating tubes Heating tubes do not work Hot wedge doesn't work Drive board doesn't work Replace the drive board Replace the hot wedge Replace the drive board Drive board doesn't work Motor doesn't move Motor fuse has blown Replace fuse 1A Replace the power switch Power switch doesn't work Causes Solutions

Fault Hot wedge burned Thermocouple failure Replace the thermocouple Replace the drive board Drive board doesn't work Wires "+" and "-" of thermocouple were connected wrongly Connect correctly Shows on display: Mosaicgarbled Press two buttons at the same time so that it heats Stop heating Change the display screen or board Display screen or board doesn't work Shows on diplay “thermoc-ouple ERR” Shows on diplay “CT:016℃ ST：Pause” No thermocouple Check whether the thermocouple wire in the display board is off Replace the thermocouple Thermocouple burned Causes Solutions

We will be responsible for failures caused by material or manufacturing defects. We will repair or replace defective parts at our sole discretion to meet the warranty requirements. · The quality assurance does not include damage to wearing parts (heating elements, carbon brushes, bearings, etc.), damage or defects caused by improper handling or maintenance, and damage caused by falling products. Irregular use and unauthorized modification should not be covered by the warranty. · It is strongly recommended to send the product to Lesite company or authorized repair center for professional inspection and repair. · Only original Lesite spare parts are allowed. 1 One year warranty

Add: 5# Jingpu Road, Pushang Industry Park, Cangshan, Fuzhou, 350007, Fujian, China Tel：+86(591)83818890 E-mail：[email protected] Web：www.lesiteweld.com Lesite Hot Wedge Welder 09/2021-EN