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OM-198 683 Page 25
4-9. Troubleshooting
Trouble Remedy
No weld output; wire does not feed.
Be sure line disconnect switch is On (see Section 2-13).
Replace building line fuse or reset circuit breaker if open (see Section 2-13).
Reset circuit breaker CB1 (see Section 4-2).
Secure gun trigger connections (see Section 2-6).
Have Factory Authorized Service Agent check Power switch.
Have Factory Authorized Service Agent check all board connections and main control board.
H – – message appears on voltmeter display to indicate thermostat TP1 is open and unit is in an over-
heated condition (see Section 3-2).
No weld output; wire feeds. Thermostat TP1 open (overheating). Allow fan to run; the thermostat will close when the unit has cooled
(see Section 2-2).
Connect work clamp to get good metal to metal contact.
Replace contact tip (see Section 4-4).
An overload condition occurred. Release gun trigger (see Section 4-3).
Have Factory Authorized Service Agent check main control board and main rectifier.
Low weld output. Connect unit to proper input voltage or check for low line voltage (see Section 2-13).
Check input voltage jumper links and correct position if necessary (see Section 2-11).
Have Factory Authorized Service Agent check main control board.
Fan motor does not run. Have Factory Authorized Service Agent check fan-on-demand circuit.
Low, high, or erratic wire speed. Readjust front panel settings (see Section 3-1).
Change to correct size drive rolls (see Section 4-5).
Readjust drive roll pressure (see Section 2-14).
Replace inlet guide, contact tip, and/or liner if necessary (see Sections 4-4, and 4-7).
Check position of input jumper links (see Section 2-11).
Have Factory Authorized Service Agent check main control board.
No wire feed.
Reset circuit breaker CB1 (see Section 4-2).
Turn Wire Speed control to higher setting (see Section 3-1).
Clear obstruction in gun contact tip or liner (see Sections 4-4, and 4-7).
Readjust drive roll pressure (see Section 2-14).
Change to correct size drive rolls (see Section 4-5).
Rethread welding wire (see Section 2-14).
Check gun trigger and leads. Repair or replace gun if necessary.
Have Factory Authorized Service Agent check main control board.
H – – message appears on voltmeter display to indicate thermostat TP1 is open and unit is in an over-
heated condition (see Section 3-2).