Tweco 1000 Merlin(Dec2004) - Manual (Page 52)

SERVICE 5-6 Manual 0-2708
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 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 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 secondary
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 cool-
ant 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 Re-
mote 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.
2. Faulty power supply.
a. Isolate and replace component(s) per Service
Manual.