Tweco 1000 CE Merlin - Manuel (Page 50)

SERVICE 5-6 Manual 0-2731
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 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 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.
Troubleshooting With Optional Remote Arc
Starter
NOTE
The following troubleshooting is to be used only if
the system has the Optional Remote Arc Starter
installed.
Q. Start signal given to the Power Supply. Gas flows
for selected pre-flow time. DC indicator is OFF,
does not even come ON momentarily.
1. Problem not in the Remote Arc Starter. The Power Sup-
ply is has no DC voltage output.
a. Refer to the Power Supply Service Manual to test
the output of the Power Supply