Name: Manual for BOBCAT 225 NT - Troubleshooting and error codes + PDF Download
Brand: MILLER

Manual for BOBCAT 225 NT - Troubleshooting and error codes + PDF Download

Brand: MILLER

Category: Portable Generator

Manual Type:

Language:

Uploaded: April 8, 2025, 1:36 a.m.

Manual Publish Date: 2000-01-01

Warranty Summary

MILLER warrants the BOBCAT 225 NT for 5 years on parts and 3 years on labor for original main power rectifiers and inverters, and 3 years on parts and labor for other key components, with specific periods for smaller components and accessories.

To operate the MILLER BOBCAT 225 NT Welding Generator, follow these basic steps:

Engine Start: Use the Engine Control Switch to start the engine. Select 'Run/Idle' for idle speed at no load and weld/power speed under load, or 'Run' for weld/power speed continuously. Use the choke control to adjust the air-fuel mix for starting.
Select Process: Use the Weld Process Selector Switch to choose the type of welding output (Stick/Tig, Wire, AC Weld, DC Weld). Ensure to not switch under load.
Adjust Settings: Use the Coarse and Fine Adjust switches to set the desired weld amperage or voltage, depending on the selected process.
Connect Cables: Connect work and electrode cables to the appropriate output terminals, and connect auxiliary equipment to the receptacles as needed.
Begin Welding/Power: Initiate welding or use auxiliary power outlets as required, adhering to safety precautions and duty cycle limits.
Engine Stop: To stop, turn the Engine Control Switch to the 'Off' position.

Always consult the manual for detailed instructions and safety guidelines.

Troubleshooting and error codes

Trouble	Remedy
No weld output.	Check control settings. Check weld connections. Check fuse F1 and replace if open (see Section 7-4 or 8-6). Be sure all equipment is disconnected from receptacles when starting unit. Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifier SR2. Check plug PLG6 connection.
Low weld output.	Check fuse F1 and replace if open (see Section 7-4 or 8-6). Check control settings. Check and adjust engine speed (see Section 7-6 or 8-5). Service air cleaner according to engine manual. Have Factory Authorized Service Agent check brushes and slip rings.
High weld output.	Check control settings. Check and adjust engine speed (see Section 7-6 or 8-5).
Erratic weld output.	Check control settings. Tighten and clean connections to electrode and workpiece. Use dry, properly-stored electrodes for Stick and TIG welding. Remove excessive coils from weld cables. Clean and tighten connections both inside and outside welding generator. Check and adjust engine speed (see Section 7-6 or 8-5). Have Factory Authorized Service Agent check brushes and slip rings.

Troubleshooting and error codes

Trouble	Remedy
No weld output.	Check control settings. Check weld connections. Check fuse F1 and replace if open (see Section 7-4 or 8-6). Be sure all equipment is disconnected from receptacles when starting unit. Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifier SR2. Check plug PLG6 connection.
Low weld output.	Check fuse F1 and replace if open (see Section 7-4 or 8-6). Check control settings. Check and adjust engine speed (see Section 7-6 or 8-5). Service air cleaner according to engine manual. Have Factory Authorized Service Agent check brushes and slip rings.
High weld output.	Check control settings. Check and adjust engine speed (see Section 7-6 or 8-5).
Erratic weld output.	Check control settings. Tighten and clean connections to electrode and workpiece. Use dry, properly-stored electrodes for Stick and TIG welding. Remove excessive coils from weld cables. Clean and tighten connections both inside and outside welding generator. Check and adjust engine speed (see Section 7-6 or 8-5). Have Factory Authorized Service Agent check brushes and slip rings.