Tweco 42 CutMaster Operating Manual - Manual (Page 24)

CUTMASTER 42 CUTMASTER 42
SERVICE 5-2 Manual 0-5141 Manual 0-5141 5-3 SERVICE
C. Air indicator OFF
1. Gas pressure too low. Check supply pressure.
D. TEMP indicator ON, (AC indicator ON)
1. Unit air flow obstructed.
a. Check for blocked air flow around the unit and correct condition.
2. Fan blocked.
a. Check for blocked status and correct condition.
3. Unit is overheated.
a. Keep the machine plugged in and turned on for five minutes. This will allow the fan to run and cool the machine.
4. Faulty components in unit
a. Return for repair or have qualified technician repair per service manual.
E. Torch will not pilot, when torch trigger is activated.
1. Faulty parts in torch
a. Check torch parts per section 4.02 and 6.04; replace as needed.
2. Gas pressure too low
a. Adjust supply pressure to proper setting value.
3. Faulty tip in use
a. In 115VAC operation, 40 Amp Tip is used which prevents the unit from piloting;
Replace with 20 Amp Tip.
4. Faulty components in unit
a. Return for repair or have qualified technician repair per service manual.
F. No cutting output when torch is activated; AC indicator ON, gas flows, fan turns.
1. Torch is not connected properly to power supply.
a. Check torch connection to power supply.
2. Working cable not connected to work piece, or connection is poor.
a. Make sure that work cable has a proper connection to a clean, dry area of the work piece.
3. Faulty components in unit
a. Return for repair or have qualified technician repair per service manual.
4. Faulty torch
a. Return for repair or have qualified technician repair.
A. Every three months
Check external air filter, replace if necessary.
1. Shut off input power; turn off the gas supply. Bleed down the gas supply. Check air filter and replace if necessary.
NOTE
Leave internal ground wire in place.
B. Every six months
1. Check the in-line air filter(s), clean or replace as required.
2. Check cables and hoses for leaks or cracks, replace if necessary.
3. Check all contactor points for severe arcing or pits, replace if necessary.
4. Vacuum dust and dirt out of the entire machine.
5.02 Basic Troubleshooting Guide
!
WARNING
There are extremely dangerous voltage and power levels present inside this unit. Do not attempt to
diagnose or repair it unless you are an accredited service provider and you have had training in power
electronics measurement and troubleshooting techniques.
Common Faults symptom LED Indicators
A. AC indicator OFF
1. Main input power cord does not connect to power distribution net.
a. Connect the power cord.
2. Power ON/OFF switch in OFF (down) position.
a. Turn switch to ON (up) position.
3. Actual input voltage does not correspond to voltage of unit.
a. Verify that the input line voltage is correct.
4. Faulty components in unit
a. Return for repair or have qualified technician repair per service manual.
B. AC indicator blinking
1. Indicator blinking (1 sec ON/1 Sec OFF, Gas may also pulse 3 times).
a. Check for missing torch parts or not properly installed. Turn ON/OFF switch to OFF position and restart the machine
by turning the power switch to ON.
2. Indicator blinking (1 sec ON/3 Sec OFF).
a. Check for worn or sticking torch parts. Replace if necessary.
3. Indicator blinking (3 sec ON/3 Sec OFF).
a. Torch switch was depressed before machine was completely powered up. Turn ON/OFF switch to OFF position and
the restart the machine by turning the power switch to ON.