Basic Trouble Shooting Guide - Thermal Dynamics C-70A CUTSKILL Service Manual

6.02 Basic Trouble Shooting Guide

Problem - Symptom Possible Cause
Power Switch is on 1. Improper electrical connection.
but the A/C Indicator 2. System was overloaded.
does not light 3. Switch may be faulty
Primary power 1. No power or incorrect power to
switch is on, but the fan.
cooling fan does not 2. Faulty fan.
work.
No air flow at torch 1. Input air connection is
when air check disconnected.
switch is turned on. 2. Air source is not on.
3. Internal connection is loose
4. Filter or Control PCB is faulty
Torch will not pilot 1. Gas pressure too high or too
when torch switch is low.
activated. 2. Torch tip, start cartridge, or
electrode missing.
3. Start Cartridge is stuck
4. Worn or faulty torch parts
5. Thermal Switch activated
Pilot / transfer arc 1. Torch removed from work piece
goes out and or moved away from metal being
doesn't reactivate cut
Cut performance is 1. Worn torch parts.
diminished. 2. Poor Work Lead connection.
3. Current sensor or PWM PCB
faulty.
Air flows 1. Torch Switch Latch button on
continuously and front panel faulty.
torch switch latch 2. Control PCB faulty.
button doesn't work
properly.
TROUBLE SHOOTING
Recommended Action
1. Check input power source and fuse. Check input cable and
connections.
2. Turn Primary Power Switch Off and then On again.
3. Return to authorized service center for repair or replacement
1. Check electrical connections to fan.
2. Return to authorized service center for repair or replacement
1. Connect the input air.
2. Check the compressor and manufacturers manual for trouble
shooting and follow local maintenance procedures.
3. Check all air line connections and fittings.
4. Return to an authorized service center for repair.
1. Adjust gas pressure per pressure setting label on power
supply.
2. Turn off power supply. Remove shield cup. Install missing
parts.
3. Turn off power supply. Remove shield cup, tip, and start
cartridge. Check lower end fitting on start cartridge for free
movement. Replace cartridge if lower end fitting does not
move freely.
4. Inspect torch consumable parts. Replace if necessary.
5. Allow the cooling fan to run for 2 minutes or longer until it
will resume operation.
1. Release torch trigger and re-establish the pilot arc. See
block diagram Appendix 1
1a. Check current setting. Check the Electrode and Tip for
excess wear.
1b. Check that the lower end fitting on the start cartridge
moves freely. Replace any or all parts as needed.
2. Check the connection of the Work Lead to the work piece.
3. Return to an authorized service center for repair or
replacement.
1. Return to an authorized service center for repair or
replacement.
2. Return to an authorized service center for repair or
replacement.
6-2 Manual 0-4699