Troubleshooting - Miller Electric OM-225A Owner's Manual

4-4. Troubleshooting

Trouble
No pilot arc; difficulty in establishing an
arc.
No cutting output; Power light off;
Trouble lights off; Ready light off; fan mo-
tor FM does not run.
No cutting output; Power light on; Ready
light on; Trouble lights off; fan motor FM
running.
No cutting output; Power light on; Ready
light on; Trouble lights off; fan motor FM
running slowly.
Power light flashing.
No control of output.
No gas/air flow; Power light on; Ready
light on; Trouble lights off; fan motor FM
running.
Pressure Trouble light On; Ready light
off.
Cup Trouble light On; Ready light off.
Temperature Trouble light On; Ready
light off.
Fan motor FM does not run; Power light
and Ready light both On.
Trouble lights not working.
Sparks come out top of cut, or cut is not
clean.
Arc goes out while cutting.
Arc goes on and off while cutting.
OM-225 Page 18
Clean or replace worn consumables as necessary (see torch Owner's Manual).
Check for damaged torch or torch cable (see torch Owner's Manual).
Place Power switch in On position.
Place line disconnect device in On position (see Section 2-7).
Check line fuse(s) and replace if needed or reset circuit breakers (see Sections 2-6 and 2-7).
Be sure work clamp is connected.
Clean or replace worn consumables as necessary (see torch Owner's Manual).
Check position of input voltage selector switch S2 (see Section 2-7).
Check position of input voltage selector switch S2 (see Section 2-7).
Manual power reset is needed. Turn Power switch Off, then back On.
Check position of input voltage selector switch S2 (see Section 2-7).
Have Factory Authorized Service Agent check control board PC1, and LED/pot board PC2.
Have Factory Authorized Service Agent check for proper torch connections, and check control board
PC1. Check operation of gas valve GS1, and check gas/air system for leaks.
Check for correct gas/air pressure adjustment (see Section 3-1).
Check for sufficient gas/air supply pressure (see Section 2-5).
Check for dirty air filter/regulator and clean, if needed (see manufacturer's instructions).
Check torch shield cup (see Section 4-3).
Have Factory Authorized Service Agent check for proper torch connections, and check LED/pot board
PC2.
Main transformer or output inductor overheating. Allow fan to run; the Trouble light goes out when the unit
has cooled.
Have Factory Authorized Service Agent check fan motor connections.
Have Factory Authorized Service Agent check LED/pot board PC2.
Torch travel speed too fast; reduce travel speed (see Sections 2-3 and 3-2).
Clean or replace worn consumables as necessary. See torch Owner's Manual.
Metal being cut is too thick; increase Output control setting (see Section 3-1).
Be sure work clamp is securely attached (see Section 2-5).
Make sure drag shield is contacting metal, or correct standoff distance is maintained if not using a drag
shield (see Section 3-2).
Be sure work clamp is securely attached (see Section 2-5).
Clean or replace worn consumables as necessary. See torch Owner's Manual.
Torch travel speed is too slow; increase travel speed (see Sections 2-3 and 3-2).
Clean or replace worn consumables as necessary. See torch Owner's Manual.
Remedy