Daihen OTC Welbee WB-M350 User Manual (English)

Questions and Answers:

T
Timothy CarrollSep 1, 2025
What does Daihen OTC Welbee WB-M350 Portable Generator error E-301 mean?
- D
  David CostaSep 1, 2025
  If your Daihen Portable Generator displays error codes E-301 to E-304, it indicates that the temperature inside the welding power source exceeded the allowable range. Leave the power on and let the cooling fan run for at least 10 minutes before turning off the power. After that, clean any dust inside the welding power source. Be careful not to exceed the rated duty cycle after recovery.
M
Michael CainAug 30, 2025
What does error code E-210 mean on a Daihen OTC Welbee WB-M350?
- E
  erin63Aug 30, 2025
  If your Daihen Portable Generator displays error code E-210, it indicates that the arc voltage was not detected. Check that the power cables (for base metal and torch sides) and the voltage detection cable are securely connected.
D
Dustin HenryAug 29, 2025
What does error E-700 mean on my Daihen OTC Welbee WB-M350?
- O
  olsondaleAug 29, 2025
  If your Daihen Portable Generator is showing error code E-700, it means an over current was detected at the output side of the welding power source. Check that the chip at the end of the torch isn't touching the base metal and that the power cables for the base metal and torch sides aren't short-circuited.
R
Ryan PriceAug 27, 2025
What does error code E-160 mean on Daihen OTC Welbee WB-M350 Portable Generator?
- A
  Ashley SanchezAug 28, 2025
  If you're seeing error code E-160 on your Daihen Portable Generator, it means the input voltage for the primary side has fallen below the allowable range. Check that the input voltage for the primary side is within the range of 208/230/460 V ± 10 %. Also, check the set value of internal function F20.
B
bhuynhAug 27, 2025
What does error code E-155 indicate on my Daihen Portable Generator?
- V
  Victoria GonzalezAug 27, 2025
  If your Daihen Portable Generator shows the error code E-155, this means the input voltage for the primary side is out of the allowable range from 265 to 320 V. To resolve this, check that the input voltage for the primary side is within the correct range of 208/230/460 V ± 10 %.
N
Nicole JonesAug 25, 2025
What does error code E-150 mean on a Daihen OTC Welbee WB-M350 Portable Generator?
- L
  Larry AndersonAug 26, 2025
  If your Daihen Portable Generator displays error code E-150, it indicates that the input voltage for the primary side has exceeded the allowable range. Verify that the input voltage for the primary side is within the range of 208/230/460 V ± 10 %.
J
Jennifer ThomasAug 23, 2025
What to do if the power LED switch does not light on Daihen OTC Welbee WB-M350?
- J
  jeffrey30Aug 23, 2025
  If the power LED switch on your Daihen Portable Generator doesn't light up when you turn on the power switch, it's likely that the primary power source isn't being supplied. Ensure that the primary power source is connected and providing the correct input voltage (208/230/460 V±10 %).

Daihen OTC Welbee WB-M350 Specifications

General

Brand	Daihen
Model	OTC Welbee WB-M350
Category	Portable Generator
Language	English

Summary

Preliminaries

Forward

Introductory text thanking the user and outlining the manual's content.

Important Information

Use of the Product

Specifies the intended purpose of the welding power source.

Safe Use of the Product

Provides essential safety precautions for operating the welding power source.

Copyright

States the copyright ownership and usage restrictions of the manual.

When Exporting the Product

Outlines considerations for exporting the welding power source internationally.

Disposal of the Product

Provides guidelines for the proper disposal of the welding equipment.

Service and Support

Chapter 1 Safety Information

1.1 Warning Symbols

Explains the meaning of various safety symbols used in the manual.

1.2 Safety Precaution

General safety precautions for operating the welding power source.

1.2.1 Operating precautions

Details specific precautions to prevent accidents during welding operation.

1.2.2 Precautions for power supply and electric shock

Provides safety measures to prevent electric shock and burns.

1.2.3 Precautions for air discharge and use of respiratory protective equipment

Safety measures concerning ventilation and respiratory protection during welding.

1.2.4 Precautions for flammable materials

Safety guidelines to prevent fire, explosion, and rupture from flammable materials.

1.2.5 Precautions for gas cylinder and gas regulator

Safety measures related to gas cylinders and regulators to prevent accidents.

1.2.6 Precautions for handling of plastic parts

Precautions for handling plastic parts to prevent damage and electrical hazards.

1.2.7 Precautions for disassembling and modifying the welding power source

Warnings against disassembling or modifying the welding power source.

1.2.8 Precaution for protective equipment

Guidelines for using personal protective equipment (PPE) during welding.

1.2.9 Precautions for rotating part

Safety measures to avoid getting caught by rotating parts, like the cooling fan.

1.3 Principal Safety Standards

Lists relevant safety standards and codes applicable to welding equipment.

Chapter 2 Product Specification and Configuration

2.1 Specification

Details the technical specifications of the welding power source.

2.1.2 Applicable welding method

Explains applicable welding methods, gas types, wire materials, and diameters.

2.1.3 External dimensions

Provides the physical dimensions of the welding power source.

2.1.4 Rated duty cycle

Explains the rated duty cycle of the welding power source and its implications.

2.2 Product Configuration

Outlines the standard and optional components of the welding power source.

2.2.1 Standard composition

Details the standard components included with the welding power source.

2.2.2 Accessory (supplied)

Lists and describes the accessories that are supplied with the welding power source.

2.2.3 Accessory (not supplied)

Lists accessories that the customer needs to prepare separately.

2.2.4 Optional accessories

Lists optional accessories that can be purchased for the welding power source.

2.2.4.1 Remote control, voltage detection cable and other optional items

Details various optional items like remote controls and detection cables.

2.2.4.2 Details on extension cables and hoses

Provides specific information about available extension cables and hoses.

2.3 Part Names

Identifies and names the various parts of the welding power source.

2.3.1 Front panel

Explains and labels the components located on the front panel of the welding power source.

2.3.2 Rear panel

Explains and labels the components located on the rear panel of the welding power source.

Chapter 3 Transportation and Installation

3.1 Required Equipment

Lists the necessary equipment for installing the welding power source.

3.1.1 Welding power source equipment

Details the specific electrical equipment and ratings required for the power source.

3.1.2 Ventilation equipment/partial exhaust facility

Explains ventilation and exhaust requirements for safe welding operations.

3.2 Installation Environment

Describes the recommended environmental conditions for installing the welding power source.

3.2.1 Installation environment

Specifies the physical location requirements for installation.

3.2.2 Electromagnetic interference

Addresses precautions and solutions for electromagnetic interference issues.

3.3 Transportation Procedure

Outlines the safe procedures for transporting the welding power source.

3.3.1 Transportation with lifting lug

Details the method for transporting the unit using lifting lugs and cranes.

3.3.2 Manual transportation with carts

Explains how to manually transport the welding power source using carts.

Chapter 4 Connection

4.1 Precautions for Connection Procedure and Grounding

Safety warnings and procedures for connecting and grounding the equipment.

4.2 Connecting the Welding Power Source

Step-by-step guide for connecting the main components of the welding power source.

4.2.1 Connection of cable at output side

Details how to connect the output cables to the welding power source.

4.2.2 Connection of wire feeder

Explains the procedure for connecting the wire feeder to the welding power source.

4.2.3 Connection of welding torch

Describes how to connect the welding torch, including water-cooled options.

4.2.4 Connection at TIG welding

Specific connection steps for TIG welding applications.

4.2.5 Connection at DC STICK welding

Specific connection steps for DC STICK welding applications.

4.2.6 Connection of shielding gas

Details the procedure for connecting the shielding gas supply.

4.3 Grounding and Connection of Input Power Supply

Explains how to properly ground and connect the input power supply.

4.4 Confirmation of Connection

Checks to perform after all connections are completed to ensure correctness.

4.5 Connection of External Equipment

Guidelines for connecting external equipment like robots or automatic machines.

4.5.1 Configuration example for connection

Illustrates a typical configuration for connecting to robotic systems.

4.5.2 Connection of automatic machine

Explains how to connect the welding power source to automatic machines.

4.5.2.1 Wiring for connecting automatic machine

Details the wiring procedures for connecting automatic machines.

4.5.2.2 Connection of terminal for external connection

Describes how to connect external terminals for controlling the welding process.

4.6 Wiring of Voltage Detection Cable at Base Metal Side

Explains how to wire the voltage detection cable for accurate arc voltage feedback.

4.6.1 Wiring to wire feeder

Details the specific wiring steps for connecting the voltage detection cable to the wire feeder.

4.6.2 Wiring to welding power source

Explains how to connect the voltage detection cable to the welding power source itself.

4.6.3 Wiring example of voltage detection cable

Provides practical examples of how to wire voltage detection cables.

Chapter 5 Welding Operation

5.1 Precaution at Welding Operation

Safety precautions to be observed during welding operations.

5.1.1 Precautions for air discharge and use of respiratory protective equipment

Safety measures for ventilation and respiratory protection during welding.

5.1.2 Precaution for protective equipment

Guidelines for using PPE during welding to protect against arc rays, noise, and hazards.

5.1.3 Precautions on welding place

Recommendations for selecting a suitable welding environment to ensure quality.

5.2 Check before Welding

Essential checks to perform before starting the welding process.

5.3 Power ON and Gas Supply

Steps for powering on the unit and supplying shielding gas.

5.4 Wire Inching

Instructions for feeding the welding wire using the inching function.

5.5 Check and Setting of Welding Condition

How to check and set welding parameters and prevent operational errors.

5.5.1 Reading welding condition

How to read pre-set or stored welding conditions.

5.5.2 Preventing erroneous operation on operation panel

Explains the function to prevent accidental changes to settings.

5.5.2.2 Deactivating erroneous operation prevention function

How to disable the erroneous operation prevention feature.

5.6 Performing Welding Operation

Procedures for executing the welding operation from start to finish.

5.6.1 Operation of welding start

Steps to initiate the welding process correctly.

5.6.2 Operation during welding

How to adjust welding current and voltage during the welding process.

5.6.3 Operation at welding end

Procedures for safely stopping the welding operation and power supply.

Chapter 6 Welding Condition

6.1 List of Welding Conditions

Lists all settable parameters and their ranges for welding conditions.

6.1.1 Parameter (Welding parameter)

Explains the various welding parameters that can be adjusted.

6.1.2 Function

Lists and describes the available functions related to welding conditions.

6.1.3 Internal function

Provides detailed explanations of the internal functions available for customization.

6.2 Function on Operation Panel

Explains the layout and functions of the keys and displays on the operation panel.

6.3 Welding Conditions

Explains basic welding conditions and useful functions.

6.3.1 Basic welding conditions

Lists the fundamental factors to consider for setting welding conditions.

6.3.2 Useful functions

Describes helpful functions like memory, synergic adjustment, and penetration control.

6.4 Preparing Welding Conditions

Outlines the step-by-step process for setting up welding conditions.

6.5 Memory Function of Welding Conditions

Explains how to save and recall welding parameters.

6.5.1 Memory registration of welding conditions

Details the procedure for saving current welding settings to memory.

6.5.2 Read out of welding conditions

Explains how to retrieve saved welding conditions from memory.

6.5.3 Deletion of memory registration

Describes how to delete saved welding conditions from memory.

6.6 Setting Welding Conditions

Explains how to set welding conditions and parameters.

6.6.1 Welding mode setting

Details how to select and set the welding mode based on material and gas.

6.6.2 Setting welding parameter

How to set welding parameters like gas discharge time, current, and voltage.

6.6.2.1 Welding sequence

Describes the sequence of welding processes (Pre-flow, Main, Post-flow, etc.).

6.6.2.2 Welding parameter setting

Step-by-step guide to setting welding parameters for different sequences.

6.6.3 Crater setting

Explains the different modes for crater treatment and torch switch operation.

6.6.3.1 Crater "OFF"

Details the Crater OFF mode and its operational sequence.

6.6.3.2 Crater "ON" (no initial condition)

Explains the Crater ON mode without an initial condition.

6.6.3.3 Crater "ON" (with initial condition)

Explains the Crater ON mode with an initial condition.

6.6.3.4 Crater (Repeated)

Describes the Crater (Repeated) mode for multiple crater treatments.

6.6.4 Arc spot time

Details the settings and operation for arc spot welding.

6.6.5 Welding voltage adjustment

How to adjust welding voltage using Synergic or Individual modes.

6.6.6 Arc characteristics adjustment

How to adjust arc characteristics to achieve soft or hard arc conditions.

6.6.7 Penetration control adjustment

Explains how to use the constant penetration function for consistent depth.

6.7 Setting Internal Functions

Advanced customization options for the welding power source.

6.7.1 Setting procedure

Step-by-step guide for accessing and setting internal functions.

6.7.2 Detailed information on internal functions

Comprehensive details on various internal functions.

6.7.2.1 F1: Standard/Extended cable mode

Function to control voltage detection with extended cables.

6.7.2.2 F4: Auto/Semi-auto mode

Function to set I/O for robots and automatic machines.

6.7.2.4 F6: Upslope time

Setting the time for gradual increase in welding current.

6.7.2.5 F7: Downslope time

Setting the time for gradual decrease in welding current at the end.

6.7.2.6 F8: Welding result display time

Setting the duration for displaying welding results after completion.

6.7.2.7 F9: Analog remote control scale

Adjusting the scale plate for analog remote control.

6.7.2.8 F10: Motor overcurrent detection level

Setting the detection level for overcurrent in the wire feed motor.

6.7.2.9 F11: Fine adjustment of welding conditions memory

Allows fine adjustment of stored welding parameters via remote control.

6.7.2.10 F13: Turbo start

Enables a turbo start function for smoother welding initiation.

6.7.2.11 F14/F15: Start control (time/current) adjustment

Setting time and current for controlled welding start.

6.7.2.12 F16: Slowdown speed adjustment

Adjusting the wire feed slowdown speed at the start of welding.

6.7.2.13 F17/F18: Anti-stick time/voltage adjustment

Setting anti-stick time and voltage to prevent wire adhesion.

6.7.2.14 F19: Switching alarm setting

Configuring how alarms affect the welding power source output.

6.7.2.15 F20: Low input voltage detection level

Setting the threshold for detecting low input voltage.

6.7.2.16 F21: Maximum cooling fan operation

Setting the cooling fan to operate at maximum speed or in power-saving mode.

6.7.2.17 F22: Operation sound switching

Controls whether operation sounds are emitted when keys are pressed.

6.7.2.18 F23: Sleep mode switching time

Setting the inactivity period before entering sleep mode.

6.7.2.19 F24: Wire feeding speed setting

Allows automatic setting of current based on wire feed speed or vice versa.

6.7.2.20 F25 to F28: External output terminal setting (reserved)

Reserved settings for external output terminals used with automatic machines.

6.7.2.21 F29 to F32: External input terminal setting

Configures the functions of external input terminals for robots and automation.

6.7.2.25 F43: CAN ID

Setting the CAN ID for PC monitoring systems.

6.7.2.26 F44: Reading welding conditions with remote control

Enables reading welding conditions from memory via analog remote control.

6.7.2.27 F45/F46/F47: Special crater sequence (effective/initial standard time setting/crater standard time setting)

Incorporates initial and crater conditions into the "No crater" sequence.

6.7.2.28 F48: Adjusting current with torch switch

Allows adjusting welding current via torch switch operations.

6.7.2.29 F49: Current increase and decrease by single-clicking

Sets current adjustment amount for single-click torch switch operation.

6.7.2.30 F50: Current increase and decrease by double-clicking

Sets current adjustment amount for double-click torch switch operation.

6.7.2.31 F51: Special crater repeat

Enables repeating crater treatment multiple times as needed.

6.7.2.32 F52: Data type of data log function

Selects which data types are saved during data logging.

6.7.2.33 F53: Sampling speed of data log function

Sets the sampling interval for the data log function.

6.7.2.34 F54 Tack start process

Enables tack welding with normal feed speed after completion.

6.7.2.35 F55 to F59: Reserved

Reserved functions for automatic machine use.

6.7.2.36 F67: Setting change of current value (initial condition, crater condition)

Sets initial/crater current as a percentage of welding current.

6.7.2.37 F68: Setting of current value (initial condition)

Sets initial condition current as a percentage of welding current.

6.7.2.38 F69: Setting of current value (crater condition)

Sets crater condition current as a percentage of welding current.

6.8 Operation of Analog Remote Control (Optional)

Explains the functions and operation of the optional analog remote controller.

Chapter 7 Administrator Functions

7.1 Protection of Welding Conditions

Explains the password protection function for welding conditions.

7.1.1 Setting/Changing password

How to set or change the password for condition protection.

7.1.2 Disabling erroneous operation prevention

How to disable the password-protected erroneous operation prevention.

7.2 Welding Result Control Function

Enables management and monitoring of welding results.

7.2.1 Setting welding result control function

How to set up the welding result control parameters.

7.2.2 Details of welding control items

Provides detailed explanations of various welding control parameters.

7.2.2.1 Number of welding point

Details how welding points are counted and controlled.

7.2.2.2 Wire consumption

Explains how wire consumption is measured and controlled.

7.2.2.3 Total welding time

Details how total welding time is tracked and controlled.

7.2.2.4 Welding monitor

Explains how average current/voltage is monitored and alarms are triggered.

7.3 Data Backup (Utilization of data)

Explains how to back up and import welding data using a USB drive.

7.3.1 Setting of welding conditions/internal functions

Details what data is stored in the backup file and how it's organized.

7.3.2 Simplified data log function

Describes how to create and use simplified data logs for welding status.

7.3.3 Failure log function

Explains the recording of error codes in a failure log file.

7.3.4 Backup operation

Step-by-step guide for backing up data to a USB flash drive.

7.3.5 Importing backup data

Instructions for importing backed-up data into the welding power source.

7.4 Initializing Welding Conditions and Internal Functions

How to reset welding conditions and internal functions to default settings.

7.5 Checking Software Version

Explains how to check the installed software version of the welding power source.

Chapter 8 Maintenance and Inspection

8.1 Precautions for Maintenance and Inspection

Crucial safety warnings and precautions for performing maintenance.

8.2 Daily Inspection

Lists the daily checks to be performed on the welding power source.

8.3 Periodical Inspection

Details the periodic inspections required every three to six months.

8.4 Periodical Replacement Parts

Identifies parts that should be replaced periodically and their recommended lifespan.

8.5 Insulation Resistance Measurement and Withstand Voltage Test

Explains procedures for insulation resistance and voltage tests (customer should not perform).

Chapter 9 Troubleshooting

9.1 Action in Case of Error

How to identify and respond to error codes indicated on the operation panel.

9.2 Troubleshooting

Addresses common problems, their causes, and corrective actions.

Chapter 10 Reference Materials

10.1 Parts List

Lists all part numbers, product names, specifications, and quantities.

10.2 Reference Drawing

Contains schematic diagrams and parts layout drawings for reference.

10.2.1 Schematic diagram

Provides the electrical schematic diagram of the welding power source.

10.2.2 Parts layout drawing

Shows the physical layout and location of components within the welding power source.

10.3 Materials for Setting Welding Conditions

Provides reference information for setting welding parameters.

10.3.1 Guide for changing welding conditions

Gives examples of problems related to improper welding conditions.

10.3.2 Samples of welding condition settings

Offers sample welding condition settings for various applications.

10.3.2.2 Example of MAG short arc welding

Sample welding conditions for MAG short arc welding with mild steel.

10.3.2.3 Example for short welding conditions of aluminum MIG

Sample welding conditions for aluminum MIG welding.

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Table of Contents