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TRM LWH 3000-P Manual

Handheld laser welding system
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Version No.：TM/M-22-SMD-082-2024
www.trm-welding.com
Handheld Laser Welding System
（LWH 3000-P）
Carefully read the instruction manual before operating the machine.
TRM Technology, Inc.
Add： #9, Huanbaosanlu, Xinbei District,
Changzhou, Jiangsu 213034, China
Version No. ：V2.2

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  • Page 1 Version No.：TM/M-22-SMD-082-2024 www.trm-welding.com Handheld Laser Welding System （LWH 3000-P） Carefully read the instruction manual before operating the machine. TRM Technology, Inc. Add： #9, Huanbaosanlu, Xinbei District, Changzhou, Jiangsu 213034, China Version No. ：V2.2...

  • Page 2: Table Of Contents

    Contents Contents I. Overview 1.1 Manufacturer 1.2 EC Compliance Statement 1.3 Intended Use 1.4 Target Audience of This Operating Manual 1.5 Warranty 1.6 Copyright of the Operating Manual 1.7 Software License Agreement 1.8 Export, Import, and Customs Control Norms II. Safety 2.1 Safety Instructions 2.2 Owner's Responsibilities 2.3 Operator's Responsibilities...
  • Page 3 Contents 3.6.4 Laser Welding Torch Parameters 3.7 Usage Requirements 3.8 Delivery and Transport 3.8.1 Delivery Scope 3.8.2 Unpacking Instructions IV. Equipment installation 4.1 Air flow and installation clearance 4.2 Attachment Installation 4.3 Cooling Medium Filling 4.4 Connect the welding protective gas 4.5 Connect the power supply 4.6 Control box 4.7 System Startup...

  • Page 4: Overview

    Overview I. Overview To ensure that you are able to use this handheld laser welding equipment safely and efficiently, we have provided this detailed operating manual, which is part of the product and must be kept close to the product to ensure that it is readily accessible to the operator. To ensure your safety and the proper functioning of the product, we strongly recommend that you carefully read and fully understand the accompanying operating manual before proceeding with product assembly, commissioning, operation or maintenance.

  • Page 5: Manufacturer

    Manufacturer 1.1 Manufacturer TRM Technology, Inc. #9, Huanbaosanlu, Xinbei District, Changzhou, Jiangsu 213034, China Tel：0519-85777780 85866920 Fax：0519-85777786 E-mail：info@termmei.com Web：www.trm-welding.com Operating Instruction...

  • Page 6: Ec Compliance Statement

    TRM or other TRM branches. 1.5 Warranty TRM, promise that the handheld laser welding equipment supplied will have the corresponding quality and performance under normal use conditions. During the product warranty period, if any manufacturing defects or performance problems are found in the product, we will provide free repair or replacement services according to relevant regulations.

  • Page 7: Copyright Of The Operating Manual

    TRM has been advised of the possibility of such losses. Users are entirely responsible for the application of the product.

  • Page 8: Export, Import, And Customs Control Norms

    TRM Technology, Inc. may update the content of the user manual due to software or hardware upgrades at any time. All such updates will be incorporated into the new version of the user manual without separate notice.

  • Page 9: Safety

    Safety 2. Safety 2.1 Safety Instructions The design, manufacturing, and safety testing of this product are conducted in accordance with current applicable safety regulations, laws, and engineering practices, making the product techni- cally safe. However, when operated by individuals without proper training or if operated improperly, the product may pose risks, and from a safety perspective, it is not always in a safe state.

  • Page 10: Owner's Responsibilities

    Safety 2.2 Owner's Responsibilities The owner of the product must ensure that the safety and health of the operator is protected at all times during the use of the product and must ensure that: - Ensuring that the product is used only in a defect-free and properly functioning condition. - Ensuring that all safety and warning labels are affixed to the product and remain clearly readable.

  • Page 11: Operator's Responsibilities

    - Replace components such as laser welding torch lenses. - Perform optimization and adjustment of electrical and mechanical aspects of the product. All other tasks must be performed only by employees of the TRM service department or by qualified professionals after consultation with the service department.

  • Page 12: Personal Protective Equipment

    Safety 2.6 Personal Protective Equipment The product owner must provide the operator with the following personal protective equipment: 1. Laser Protective Eyewear: Laser protective eyewear is an efficient and safe goggle that selectively attenuates specific wavelengths of laser light, preventing or reducing laser damage to the eyes.
  • Page 13 Safety - Class 1: Laser power less than 0.5 milliwatts, considered safe under normal operating conditions without posing harm to human health. - Class 2: Laser power at 1 milliwatt. These lasers are low-power and visible, and the human eye's blink reflex protects against prolonged exposure.

  • Page 14: Electrical Hazards

    Safety 2.7.2 Electrical Hazards The product operates on 380VAC and the system owner must ensure that the supply voltage is in a defect-free condition. Before energising the unit, ensure that all supply line isolation and connections must be intact, paying particular attention to the fact that the protective earth conductor (PE) must not be interrupted at any point.

  • Page 15: Skin Hazard

    Safety 2.7.5 Skin Hazard Prolonged exposure of the skin to infrared and ultraviolet radiation during the welding process can cause damage. Exposure to infrared radiation may result in skin thermal burns or excessive drying, while exposure to ultraviolet radiation may cause sunburn-like skin burns and increase the risk of skin cancer and accelerate skin aging in welders.

  • Page 16: Emergency Stop

    Safety 2.8.1 Emergency Stop There is an emergency stop button on the front panel of the handheld laser welding equipment. Pressing the emergency stop button will immediately cut off the main power, causing the laser to stop emitting, the chiller to stop working, and the wire feeder to stop feeding. To reconnect the main power, the emergency stop button must be reset by rotating it clockwise.

  • Page 17: Establishing Laser Controlled Areas (Lcas)

    Safety 2.9.2 Establishing Laser Controlled Areas (LCAs) Laser Control Area (LCA), also known as laser room or laser safety room, is mainly used for the protection of laser work. Its primary function is to prevent laser damage to the human body, especially to the eyes.

  • Page 18: Safety Labels

    Safety 2.11 Safety Labels This section lists the instructions and warning labels affixed to the laser welder. Table 2-B Warning Labels Description Warning Label Laser Radiation Warning Label OPTICAL Laser Output Port OUTPUT Electrical Hazard Warning label AC LINE INPUT Power Indicator Label POWER Inlet Identification Label...

  • Page 19: Label Placement

    Machine Serial Number Manufacturing Date Laser Power Dimension(m) Air Pressure Laser Product Weight Date Manufacturer： TRM Technology, Inc. Service Line: +86-0519-8577 7780 Address: #9, Huanbaosanlu, Xinbei District, Changzhou Jiangsu 213034,China. Wear Protective Eyewear Label Must Wear Protective Eyewear Properly Label Placement Handheld laser welding system www.trm-welding.com...

  • Page 20: Unauthorized Modification Or Replacement Of Parts

    Safety 2.12 Unauthorized Modification or Replacement of Parts To ensure the quality and safety of the product, any modifications to the product must receive written approval from the manufacturer. Unauthorized changes may lead to a decrease in product performance, malfunctions, or even pose safety hazards. The manufacturer has undergone a series of processes and testing during the design and production of the product to ensure its normal and safe use.

  • Page 21: Device Manual

    Device Manual 3. Device Manual The integrated handheld laser welding equipment described in this operation manual is developed for material processing, especially for welding and cutting applications of metals and metal alloys. The equipment consists of a chiller, laser generator, and control circuit, arranged in a three-tier structure.

  • Page 22: Machine Principles

    Device Manual Welding Cart Directional Wheel Facilitate the movement of the welding machine Welding Cart Swivel Caster Enable the welding machine to turn Teaching Pendant Switching of the LCD touch screen Handle Provides convenient pushing and pulling positions when the welding machine is moved Lifting Ring Used for fixing and connecting the welding machine for lifting and handling operations Wire Feeder...

  • Page 23: Temperature Control

    Device Manual 3.2.2 Temperature Control The chiller is a core component of the handheld laser welding equipment, located in the lower section of the welding machine cabinet. It consists of a water pump, water tank, compressor, condenser, cooling fan, and heating rod. The chiller, through a circulating water cooling system, removes the excess heat generated by the laser generator, torch, and the internal components of the QBH.

  • Page 24: Handheld Laser Welding Torch

    Device Manual 3.2.4 Handheld Laser Welding Torch The handheld laser welding torch serves as the bridge between the laser generator and the workpiece. It is designed for flexible movement, allowing the operator to freely navigate in space and achieve all-around welding of the workpiece. After passing through collimation, reflection, and focusing, the laser beam forms a very small spot on the surface of the workpiece.
  • Page 25 Device Manual Exploded diagram of the handheld laser welding torch Operating Instruction...
  • Page 26 Device Manual Welding gun parts list Name Model Quantity Laser Wire Feeding Nozzle 1.2 (ES-12) ES-12 Nozzle Connecting Tube (150 Focal Length) (LWH20-4009-03) LWH20-4009-03 Connecting Tube Locking Sleeve (LWH20-4009-04) LWH20-4009-04 M3X12 Hexagon Socket Head Cap Screw (M3X12 Black 12.9 Grade) M3X12 Black 12.9Grade Threaded Insulation Sleeve LWH2K-A-008...
  • Page 27 Device Manual Welding gun parts list Name Model Quantity Collimating Lens (D16mm*F50mm Daheng) D16mm*F50mm Daheng End Face Gasket Seal (LWH20-4004-02) LWH20-4004-02 Focusing Spacer Ring (LWH20-4004-03) LWH20-4004-03 SMC Micro Straight Quick Connect Air Tube Joint (M-5H-4) M-5H-4 Trigger Switch Assembly (LWH20-40PJ-02) LWH20-40PJ-02 Cross Slot Countersunk Head Screw (M2×6 Black) M2×6 Black...

  • Page 28: Wire Feeder

    Device Manual 3.3 Wire Feeder For detailed instructions on operating the wire feeder, refer to: wire feeder(WF-01A) instruction. Figure: Feeder interfaces and mechanical components Function Wire Feeder CAN Address Setting Wire Feeding Interface Working Indicator Light + Mode Switch Alarm Indicator Light Power Switch General Input/Output Interface CAN Bus Interface...
  • Page 29 Device Manual Area 1 Null line plate Null line plate Air illumination Air illumination Air illumination Air illumination Switching Switching Switching power supply power supply power supply Laser generator Chiller Wire feeder Control loop Earth plate Earth plate Area 2 Ac contactor Ac contactor Auxiliary...

  • Page 30: Technical Parameters Of The Machine

    Type www.trm-welding.com Laser Power Dimension(m) Air Pressure Laser Product Weight Date Manufacturer： TRM Technology, Inc. Service Line: +86-0519-8577 7780 Address: #9, Huanbaosanlu, Xinbei District, Changzhou Jiangsu 213034,China. 3.6 Table of Machine Technical Parameters 3.6.1 Equipment Parameters Machine Name All-in-one Handheld Laser Welding System...

  • Page 31: Chiller Parameters

    The ring system adopts the special laser water cooling unit to ensure the long-term stable operation of the laser. The main technical parameters of the water cooling machine are shown in the following table: Parameter Items Typical Values Model RJZ3000-TRM-A Power Requirements AC380V Head Water Tank Capacity 3.6.4 Laser Welding Torch Parameters...

  • Page 32: Unpacking Instructions

    Device Manual 3.8.2 Unpacking Instructions TRM delivers products with maximum protective packaging. The packaging is equipped with multi-angle anti-tilt labels. If the packaging shows signs of external damage or the multi-angle anti-tilt labels are activated, immediately notify the shipping company and the company representative.
  • Page 33 Device Manual Information - Damage During Transportation - There is a risk of product damage if mishandled during transportation. - The wooden crate is marked with an upward arrow, and the product should always be transported in an upright position. For convenient transportation, the product is equipped with casters.

  • Page 34: Equipment Installation

    Equipment installation Diagram: Cabinet lifting ring Diagram: Cable Angle during Diagram: Tensile Load on the Crane Transportation Hoisting Ring Bolt Shipping the products by the casters Warning - Risk of Death or Serious Injury from Product Tipping - Due to the higher center of gravity of the product, there is a risk of tipping during transportation.

  • Page 35: Air Flow And Installation Clearance

    Equipment installation 4. Equipment installation 4.1 Air flow and installation clearance Figure: Integrated handheld laser welding system Installation The installation of the product must adhere to the following points: - Choose the installation location, ensuring that the product is accessible from all directions. - The laser welding machine unit is cooled through liquid circulation.

  • Page 36: Cooling Medium Filling

    Equipment installation 4.3 Cooling Medium Filling The cooling medium must be softened water, such as purified water, distilled water, high-purity water, etc. It is permissible to add ethylene glycol in a volume ratio of ≤30%, or ethanol in a volume ratio of ≤20%. Additionally, the addition of manufacturer-approved corrosion inhibitors and disinfectants is allowed.

  • Page 37: Connect The Welding Protective Gas

    Equipment installation 4.4 Connect the welding protective gas Feature Specication Welding shielding gas • Argon • Nitrogen Rear Panel Welding Gas Protection trachea input outer diameter 10mm. Connections 4.5 Connect the power supply Refer to the numbered tube identification in the power inlet cable for proper power require- ments.

  • Page 38: Control Box

    Equipment installation 4.6 Control box The function definition of the connector is shown in the following figure: Pulse Width Modulation- Pulse Width Modulation+ -15V Analog Signal- 15V_GND Analog Signal+ +15V External Control of Laser Emission 24V_GND_3 24V_3 Red Light Enable+ Laser Enable Laser Generator Alarm Power Laser Generator Alarm Power Input...

  • Page 39: System Shutdown

    Equipment installation 1.Check that all required connections have been made. -Electrical connections -The safety ground lock (crocodile clip) is attached to the workpiece. -Protective gas is connected and the gas valve is open -Emergency stop box is connected 2. Make sure the emergency stop button is released. 3.

  • Page 40: Operation And Use

    5.2 Preparations Before Debugging Warning - Hazard of Laser Radiation - Radiation can damage the eyes and skin. - Collaborate with the TRM service department for debugging work. Warning - Risk of Burns - After laser processing, the processed surface of the workpiece becomes very hot immediately.

  • Page 41: Operation Panel Introduction

    Operation and Use 5.4 Operation Panel Introduction The control system of the LWH 3000-P consists of a touchscreen and controller. The touchscreen interface includes seven main pages: Home Page, Welding, Process, Expert Database, Wire Feeding, Water Cooler, and Settings. Detailed usage and parameter explana- tions for each section are provided below.

  • Page 42: Operation And Use

    Operation and Use 5.4.2 Welding [Welding] The Welding page is used to call welding parameters. The left side of this page displays the welding process parameters, while the right side shows the current status. Welding parameters cannot be edited on this page; to make edits, switch to the Process page. The first image represents the welding page in Administrator Mode, allowing administrators to switch to other pages for parameter adjustments.
  • Page 43 Operation and Use - Scan Frequency: The scanning frequency used for the current welding workpiece's galvanom- eter deflection speed. - Wire Feed Speed: The uniform and stable wire feed speed when the wire feeding function is enabled. This speed is effective only when using a stepper motor for wire feeding. - Wire Feeder Quantity: Displays the number of wire feeders used for the current welding parameters.

  • Page 44: Process

    Operation and Use 5.4.3 Process [Process] The Process interface is used to adjust and modify welding parameters. By entering the process package number in the process name, the corresponding parameters for that name can be retrieved. After adjusting the process, clicking the save button will automatically save the process parameters to the internal memory.

  • Page 45: Expert Database

    Operation and Use - Wire Feed Delay (ms):Wire feed delay time (0-1000ms). - Continuous Welding/Spot Welding:Continuous welding for continuous welding, and spot welding can be modified according to the "Spot Welding Time" in the [Settings] interface. - No Wire Feeding:Can switch between "No Wire Feeding/Continuous Wire Feeding/Pulse Wire Feeding"...

  • Page 46: Parameter Descriptions

    Operation and Use feeders can be achieved. On the right side of the page is the status indication for multiple wire feeders feeding simultaneously. You can manually select the on/off switch for each wire feeder and observe their respective statuses. Parameter Descriptions: - Wire Feed:Manually feed the wire.

  • Page 47: Water Chiller

    Operation and Use 5.4.6 Water Chiller [Water Chiller] The page displays the current status of the water chiller and allows direct modification of its parameters. Parameter Explanation: - Low-Temperature Water:Temperature of the low-temperature water. - Liquid Level: Icon indicating the liquid level; normal level is green, low level is red. - Flow Rate: Current flow rate of the chiller.

  • Page 48: Settings

    Operation and Use - Room Temperature Water Load Temperature Difference: Temperature difference that rises within a unit time for room temperature water. - Room Temperature Water Unload Temperature Difference: Temperature difference that falls within a unit time for room temperature water. - Low-Temperature Water Temperature Setting Upper Limit:Upper limit value for the set temperature of low-temperature water.

  • Page 49: Important Safety Features

    Operation and Use [System Settings] In this page, the parameters include the unique serial code for the current machine, used to identify the current model. The license is an activation code used to activate the machine. Each machine has a trial period of 200 hours, and after the trial ends, it will be locked. To continue usage, a permanent activation license must be entered.

  • Page 50: Nozzle And Nozzle Connection Pipe

    Operation and Use 5.6 Nozzle and Nozzle Connection Pipe 5.6.1 Nozzle Types There are six types of nozzles available. 5.6.2 Nozzle Installation Before changing nozzles, switch off the unit and screw the nozzle onto the nozzle connec- tion tube. 5.6.3 Connection Pipe Adjustment Switch off the unit before adjusting the nozzle connection tube.

  • Page 51: Quick Start Welding Using Preset Programs

    Operation and Use 1. To adjust the nozzle connecting tube, first loosen the nut and then adjust the position of the connecting tube as shown on the left. 2. Once the nozzle connecting tube is correctly positioned, tighten the nut to lock the connecting tube in place as shown on the right.

  • Page 52: Maintenance

    - For maintenance tasks, failure to take safety precautions can result in serious injury to maintenance personnel. - Maintenance personnel are responsible for assembly, maintenance, and repairs, and they must undergo product maintenance training provided by TRM or other TRM branch organizations. Warning - Wearing Laser Safety Goggles...

  • Page 53: Maintenance And Cleaning Of Optical Fibers

    Maintenance 6.4 Maintenance and cleaning of optical fibers Warning - Risk of Laser Radiation Exposure - The 2M-class guiding laser poses a severe risk of eye damage when observed through optical instruments (microscopes). - Cleaning of the fiber optic connectors should only be carried out by trained maintenance personnel.
  • Page 54 In case of persistent dirt accumulation, it may be necessary to replace the fiber protection lens with a new one, which can be ordered from TRM. ITEM...

  • Page 55: Disconnecting Fiber Output

    Maintenance 6.4.1 Disconnect fiber output When disassembling the QBH connector, be cautious to avoid damaging the quartz block and ensure the cleanliness of the quartz block surface. Any contamination can lead to severe damage to the fiber. When organizing and wiring the fiber, ensure that the fiber bending radius is greater than 250mm.

  • Page 56: Qbh Fibre Optic Protective Lens Cleaning Procedure

    Maintenance 6.4.2 QBH fibre optic protective lens cleaning procedure Each time the fibre output connected to the welding head is disconnected, the end face of the fibre QBH Fibre Protective Lens must be inspected for dust, dirt or if it is damaged: Isopropyl alcohol and acetone are highly volatile and highly flammable substances.

  • Page 57: Maintenance And Care Of The Chiller

    Maintenance 8. Recheck the surface. 9. If acetone is still contaminated, repeat step 7. 10. If necessary, apply a drop of acetone to a clean wipe and wipe off contaminants in a circular motion. Do not scratch the surface. Do not touch the tip of the cleaning swab with your fingers. Each swab should only be used once to prevent contamination.

  • Page 58: Winter Antifreeze

    Maintenance 6.5.2 Winter Antifreeze When the equipment is transported or not in use for an extended period, drain the water from the water tank through the drain valve and loosen the drain screw under the water pump to drain any remaining water from the pump.

  • Page 59: Function Test And Methods

    Maintenance 6.6 Function Test and Methods Function testing is an essential means of inspecting the performance of the equipment, ensuring that various functions operate normally, such as laser output performance, stability of electronic components, reliability of optical devices, etc. Through function testing, potential issues can be identified, allowing for timely repairs to ensure product quality and reduce losses caused by equipment failures.

  • Page 60: Common Abnormity Handling

    Common Abnormity Handling 7. Common Abnormity Handling 7.1 The screen does not light up/click does not respond The screen does not light up, if the controller is powered on (the fan is running), check whether the four-core wire between the controller and the screen is connected correctly. 7.2 No light The monitoring interface can exclude other alarms.

  • Page 61: Service And Support

    Service and Support 8. Service and Support When the customer uses parts that are not serviceable in the field, please consult the after-sales personnel for maintenance matters. Questions about the safety, setup, operation, and maintenance of the product can be resolved by reading this user guide carefully.

  • Page 62: Appendix

    Appendix Appendix1 Operating Instruction...
  • Page 63 Appendix Appendix 1 Operating Instruction...
  • Page 64 Appendix Appendix 2 Table Attachment List Material Code Material Name Model Quantity Laser Wire Feeding Nozzle 1.2 (AS-12) 3.13.04.0044 AS-12 Laser Wire Feeding Nozzle 1.6 (BS-16) 3.13.04.0045 BS-16 Laser Wire Feeding Nozzle 1.2 (CS-12) 3.13.04.0046 CS-12 Laser Wire Feeding Nozzle 1.2 (ES-12) 3.13.04.0040 ES-12 Laser Wire Feeding Nozzle 1.6 (FS-16)

  • Page 65: Circuit Diagram

    Appendix Appendix 3 Circuit Diagram Example Identify Function Description Color Identify Function Description Live Wire Red(RD) Circuit breaker/Transfer switch Neutral Wire Blue(BU) AC contactor/Intermediate relay Ground Wire GreenYellow(GNYE) Rectifier DC24V Brown(BN) Switch/Button DC0V White(WH) Switching power supply DC36V Brown(BN) Solenoid valve DC0V White(WH) +15V...

  • Page 66: Switching Mode Power Supply

    Appendix Switching Mode Power Supply PE（15V） Operating Instruction...
  • Page 67 Appendix Main Power Supply - C Operating Instruction...

  • Page 68: Main Control Board

    Appendix Main control board PE（15V） Operating Instruction...
  • Page 69 Appendix Remote panel Operating Instruction...
  • Page 70 Appendix Laser generator (Chuangxin) Enable input+ Enable input- Red and white Modulation input+ Black Modulation input- Black and white External light emission+ Yellow External light emission- Blackish yellow DA（0-10V）input+ Green DA（0-10V）input- Greenish white Fault output1 Brown Fault output2 Brownish white Blue Blue and white Operating Instruction...

  • Page 71: I/O Interface Diagram

    Appendix I/O interface diagram I/O-2 24V_ISO 24V_2 3.3V 3.3V Clamp+(I/O-2-7) FUSE ALARM+(I/O-2-1) 100mA ALARM-(I/O-2-2) Clamp-(I/O-2-8) 24V_GND2 ISO_GND 24V_ISO 3.3V GAS+(I/O-2-3) GAS-(I/O-2-4) ISO_GND 24V_ISO 3.3V Wire+(I/O-2-5) Wire-(I/O-2-6) ISO_GND Operating Instruction...
  • Page 72 Appendix External I/O 24V_2 +24V_2 3.3V +3.3V +24V(Pin2) Helmet Helmet(Pin1) FUSE Laser+(Pin7) 100mA GND(Pin8) 24V_GND2 24V_GND2 +24V_2 24V_2 +3.3V 3.3V +24V(Pin6) Door Door(Pin5) FUSE LED Control Gas+(Pin9) 100mA GND(Pin4) 24V_GND2 24V_GND2 +24V_2 +3.3V FUSE Run+(Pin10) 100mA 24V_GND2 Mechanical Switch——Pin5+Pin6 Proximity Switch——Pin4+Pin5+Pin6(PNP_Normal Open) Pin Definition Hole Function...
  • Page 73 Appendix Pneumatic schematic diagram Operating Instruction...
  • Page 74 Appendix List of electrical components Material Code Name Model Quantity 3.13.01.0116 Touch Screen DMG10600K101-03WTR 3.13.01.0099 Key Switch XA2EG73 3.13.01.0112 Emergency Stop Knob Head ZB2BS54C 3.13.01.0113 Emergency Stop Knob Base ZB2BZ102C OSMC65H2D40 3.13.01.0048 Air Switch 3.13.01.0049 Air Switch OSMC65H2D16 3.13.01.0051 Air Switch OSMC65H2D4 3.13.01.0047 Air Switch...
  • Page 75 Note Note Operating Instruction...
  • Page 76 Tel： 0519-85777780 85866920 For inquiries regarding the content of Fax： 0519-85777786 this document, please get in touch with Email：info@termmei.com our sales department. Revision Date： 2024-09-03...

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