Tweco 1000 Merlin(Sept1999) - Manual (Page 44)

SERVICE 40 Manual 0-2731
2. Low flow in gas supply path
a. Check for leak or restriction in gas supply lines,
replace as necessary
b. Check for damaged torch parts, replace as nec-
essary
3. Faulty components in unit
a. Return for repair or have qualified technician
repair per Service Manual.
I. Torch cuts but not adequately
1. Current set too low
a. Increase current setting.
2. Torch is being moved too fast across workpiece
a. Reduce cutting speed (refer to Instruction
Manual supplied with torch.
3. Excessive oil or moisture in torch
a. Hold torch 1/8 inch (3 mm) from clean surface
while purging and observe oil or moisture
buildup (do not activate torch)
4. Worn torch parts
a. Replace torch consumables.
5. Using wrong gas for material being cut
a. Use correct gas for operation.
J. GAS LED indicator OFF
1. Gas pressure set too low
a. Adjust pressure
2. Faulty power supply
a. Isolate and replace component(s) per Service
Manual.
3. No coolant flow.
a. Return for repair or have qualified technician
repair per Service Manual.
K. GAS LED indicator OFF, plasma and/or secondary
gas does not flow
1. Low plasma pressure
a. Check plasma pressure
2. Secondary supply turned OFF (or cylinder empty)
a. Check secondary supply
3. Secondary Selector switch set to wrong position
a. Check and set switch to proper type of second-
ary being used
4. Blocked torch
a. Check torch parts.
5. Faulty power supply
a. Isolate and replace component(s) per Service
Manual.
L. GAS Indicator flashing ON and OFF
1. Air in coolant lines
a. Run pump for ten minutes to purge air from the
coolant lines before using the system.
2. Coolant Level is low
a. Check for proper coolant level at rear panel
gauge
M. Leaking torch connection
1. Loose torch connection
a. Check connection making sure connector is fully
seated.
N. Weak or sputtering pilot; HF stays on during pilot
1. Plasma gas pressure too high
a. Adjust pressure
2. Low OCV (normal 290-350 VDC) caused by improper
input voltage selection
a. Check input voltage connections
3. Faulty power supply
a. Isolate and replace component(s) per Service
Manual.
O. Pilot arc ON; No main arc transfer (torch brought
within range of work)
1. Work cable not connected
a. Connect work cable securely
2. Faulty power supply
a. Isolate and replace component(s) per Service
Manual.
3. Faulty Optional Remote Arc Starter
a. Refer to 'Troubleshooting With Optional Remote
Arc Starter' below
P. AC indicator ON; GAS indicator light ON; torch is
activated; DC indicator light blinks
1. Shorted torch.
a. Isolate and replace component(s) per Torch
Manual.