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A complete Parts List is available at www.MillerWelds.com
OM-201 872 Page 42
7-6.
Troubleshooting Power Source
Trouble
Remedy
No pilot arc; difficulty in establishing an
arc.
Clean or replace worn consumables as necessary (see torch Owner’s Manual).
arc.
Check for damaged torch or torch cable (see torch Owner’s Manual).
Check position of cut/gouge switch. If using cutting consumables, be sure that switch is in the CUT
position. If using gouging consumables, be sure that switch is in the GOUGE position.
No cutting output; Power light off;
Trouble lights off; Ready light off; fan
motor FM does not run.
Place Power switch in On position.
Place line disconnect device in On position (see Section 4-7).
Check line fuse(s) and replace if needed or reset circuit breakers (see Section 4-9).
Pilot arc working; no cutting output;
Power light on; Trouble lights off; fan
motor running.
Be sure work clamp is connected.
Clean or replace worn consumables as necessary (see torch Owner’s Manual).
No gas/air flow; Power light on; Trouble
lights off; fan motor running.
Have Factory Authorized Service Agent check for proper torch connections. Check operation of gas
valve AS1, and check gas/air system for leaks. Check filter element (see Section 7-5).
Pressure Trouble light On.
Check for correct gas/air pressure adjustment (see Section 5-2).
Check for sufficient gas/air supply pressure (see Section 4-5).
Check for dirty air filter/regulator and replace, if necessary (see manufacturer’s instructions).
Check air lines for leaks.
Have Factory Authorized Service Agent check pressure switch and control board.
Cup Trouble light On.
Check torch shield cup (see Section 7-3). Reset power switch.
Have Factory Authorized Service Agent check for proper torch connections.
Temperature Trouble light On.
Unit overheating. Allow fan to run; the Trouble light goes out when the unit has cooled.
Have Factory Authorized Service Agent check control board.
Trouble lights not working.
Have Factory Authorized Service Agent check unit.
Power light flashing, Trouble lights off.
Reset power switch. Have qualified technician check input line power. Make sure line power is three
phase. Single phase power will cause an incorrect power condition.
Pressure trouble light flashes.
Unit lost pressure (momentarily) while cutting. Check air line for leaks.
Short tip life.
Check and clean drag shield of any slag, particles, and debris.
Check position of cut/gouge switch. Place switch in correct position to match the process.
Check for correct gas/air pressure adjustment (see Section 5-2).
