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Hypertherm Powermax 125 Service Manual

Hypertherm Powermax 125
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158 Powermax125 Service Manual 808070
8 Troubleshooting and System Tests
Test 6 Torch stuck open/torch stuck closed
Symptom: No fault occurs at power-up, but an 0-30 fault displays on the operator screen when attempting to fire the
torch.
Confirm that all of the proper consumables are installed in the torch.
In an idle (no start signal) working system with the torch and consumables installed, there should be continuity between
the dual black wires connected to the center post of the pilot arc IGBT and the red wire connecting to J28. With gas
flowing through the torch (gas test mode 1) there should be very high resistance between those 2 points.
To set the system to gas test mode, display the service screen (refer to Displaying the
service screen on page 128), move the cursor toG (gas), and use the adjustment knob
to toggle to “1” (gas test mode). If air does not flow, the regulator might be faulty. Examine
the fault log to see if any 3-20-n faults are logged. (See Run a gas test on page 130.)
Figure 27
Before continuing, turn OFF the power.
If the resistance value is always less than 100 Ω, remove the torch and recheck the resistance. If the value is still less than
100 Ω:
Use an IGBT tester to check for a shorted pilot arc IGBT.
Replace the pilot arc IGBT if it is shorted.
If the resistance is always greater than 100 Ω:
Replace all consumables and recheck.
If the resistance is correct (< 100 Ω) the old consumables are bad.
J27
WORK
LEAD
J26
RED
J18
ORG
J17
J32
J28
RED
J27
WORK
LEAD
J26
RED
J18
ORG
J17
J32
J28
RED
Gas test mode 0 Gas test mode 1
Black wires
Red wire (J28)
Continuous with the
nozzle or torch outer body
Continuous with system
negative
<5Ω >10kΩ

Table of Contents

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Hypertherm Powermax 125 Specifications

General IconGeneral
Output Current30-125 A
Input Power15.2 kW
Open Circuit Voltage300 VDC
Gas SupplyClean, dry, oil-free air or nitrogen
Input Power Cable Length10 ft (3 m)
Rated Output Current125 A
Gas TypeAir or nitrogen
Cutting Capacity1-1/4 inch (32 mm)
Pierce Capacity1 inch (25 mm)
Input Voltage200-600 V, 3-PH
Duty Cycle100% @ 125 A
CertificationsCSA
Maximum Clean Cut Thickness1-1/4 inch (32 mm)
Cooling MethodFan-cooled
Torch OptionsHand

Summary

Electromagnetic Compatibility (EMC)

Installation and Use for EMC

User responsibilities for installing and using equipment to achieve electromagnetic compatibility.

Warranty Information

General Warranty Terms

Hypertherm's warranty for products against defects in materials and workmanship.

1 Specifications

Powermax125 System Description

Overview of the Powermax125 as a portable plasma cutting system for various applications.

Hypertherm Power Supply Ratings

Technical ratings and specifications for Hypertherm power supplies.

2 Power Supply Setup

Preparing the Electrical Power

Instructions for preparing the electrical power supply, including fuse and switch requirements.

Power Connection for Powermax125

Details on connecting the Powermax125 to power, including voltage configurations and fuses.

Preparing the Gas Supply

Requirements for gas supply, including compressor or cylinder use and regulator specifications.

Connecting the Gas Supply

Procedure for connecting the gas supply hose to the power supply unit.

Minimum Inlet Pressure and Gas Flow Rates

Tables detailing minimum inlet pressure and gas flow rates for cutting and gouging.

3 Basic System Operations

Front Panel Controls and LEDs

Detailed explanation of front panel controls like adjustment knob, selectors, and LEDs.

Status Screen Interpretation

Understanding the information displayed on the status screen, including icons and readings.

Fault Codes and Icons

Explanation of fault codes and icons that appear on the status screen for troubleshooting.

4 Hand Torch Setup

Installing Hand Torch Consumables

Step-by-step instructions for installing shield, retaining cap, nozzle, electrode, and swirl ring.

5 Hand Cutting

Starting Cuts from the Edge

Procedure for starting a cut from the edge of a workpiece with the hand torch.

Piercing a Workpiece

Instructions for safely piercing a workpiece with the hand torch, including angle and distance.

Gouging a Workpiece

Step-by-step guide for performing gouging operations with the hand torch.

Common Hand-Cutting Faults

Troubleshooting common issues in hand cutting, such as incomplete cuts or poor quality.

6 Machine Torch Setup

Choosing Machine Torch Consumables

Guidance on selecting consumables for different machine torch applications.

Machine Torch Consumables Types

Lists of consumables for mechanized shielded, gouging, and FineCut applications.

Installing Machine Torch Consumables

Procedure for installing consumables into the machine torch.

Using the Cut Charts

Explanation of how to use cut charts for mechanized consumables and data interpretation.

7 Mechanized Cutting

Connecting the Machine Interface Cable

Details on connecting the machine interface cable for arc transfer and plasma start signals.

Setting Up the Torch and Table

Steps for setting up the torch and table, including alignment and motion system checks.

Optimizing Cut Quality

Factors affecting cut quality such as cut angle, dross, and straightness.

Piercing with the Machine Torch

Procedure for starting cuts by piercing the workpiece with the machine torch.

8 Troubleshooting and System Tests

Controls and Indicators Overview

Description of system controls and indicators, referencing Basic System Operations.

Sequence of Operation

Step-by-step operational sequence from power off to power on.

Troubleshooting Preparation

Prerequisites and safety considerations for service technicians performing troubleshooting.

Troubleshooting Procedures and Sequence

Overview of troubleshooting steps and references to other manual sections.

Hypertherm IGBT Tester Usage

Instructions for using the Hypertherm IGBT tester to test IGBTs.

IGBT Device Test Procedures

Procedures for testing IGBTs using the Hypertherm tester and troubleshooting the tester itself.

Fault Codes and Solutions

Table detailing fault categories, codes, and suggested solutions for troubleshooting.

Troubleshooting Guide

Guide to common problems, meanings, causes, and solutions for Powermax usage.

System Tests Overview

List of system tests, their descriptions, and associated fault codes.

Test 1 – Voltage Input

Procedure for checking incoming AC line voltage and output voltage of the input diode bridge.

Test 4 – Inverter Temperature Sensor

Troubleshooting procedure for inverter temperature sensor faults (0-40-2, 0-40-3, 2-10-0, 2-10-1).

Test 6 – Torch Stuck Open/Closed

Procedure to diagnose and resolve faults related to torch stuck open or closed conditions.

Test 7 – Start Signal Check

Procedure to test the start signal from the torch trigger to the control board.

Test 10 – Pressure Sensor Check

Procedure for testing the pressure sensor and troubleshooting readings that do not agree.

9 Power Supply Component Replacement

Replacing the Control Board

Procedure for replacing the main control board.

Replacing the DSP Board

Instructions for removing and installing the Digital Signal Processor (DSP) board.

Replacing the Power Board

Procedure for removing and installing the power board.

Replacing the Pilot Arc IGBT

Instructions for replacing the pilot arc IGBT module.

Replacing the Inverter IGBT Module

Procedure for replacing the inverter IGBT module.

Replacing the Bulk Capacitors

Procedure for replacing bulk capacitors on the power board, noting polarity.

Replacing the Transformer

Procedure for removing and installing the transformer.

Replacing the PFC Inductor

Instructions for removing and installing the PFC inductor.

10 Torch Component Replacement

Disconnecting Power, Gas Supply, and Torch

Procedure for safely disconnecting power, gas, and torch before maintenance.

11 Parts

Power Supply Parts Identification

Lists and diagrams of replacement parts for the power supply exterior and interior.

Hand Torch Consumables

Part numbers for consumables used in drag cutting, gouging, and FineCut applications.

Machine Torch Consumables

Part numbers for shielded and gouging consumables for machine torches.

12 Wiring Diagrams

Powermax125 Schematic Diagram

Detailed schematic diagram of the Powermax125 electrical system.

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