Table of Contents
Advertisement
SECTION 10 − TROUBLESHOOTING
10-1. Troubleshooting
.
Also see Voltmeter/Ammeter help displays to assist in troubleshooting weld problems (see Section 8-11). Also see Engine Information Display
to assist in troubleshooting engine related problems (see Section 13).
A. Welding
Trouble
No weld output; generator power output
okay at AC receptacles.
No weld output or generator power out-
put at AC receptacles.
Erratic weld output.
High weld output.
Low weld output.
Low open-circuit voltage.
High open-circuit voltage with VRD
switch On.
No remote fine amperage or voltage
control.
.
Complete Parts List available at www.MillerWelds.com
Place Process/Contactor switch in an Electrode Hot position, or place switch in a Remote On/Off Re-
quired position and connect remote contactor to Remote 14 receptacle (see Sections 5-17).
Reset supplementary protector CB3 (see Section 8-10).
Reset supplementary protector CB9 and/or CB29 (see Section 8-10). Check for faulty remote device
connected to Remote 14 receptacle.
Check and secure connections to Remote 14 receptacle (see Section 5-17).
If VRD switch S5 is On, check voltage feedback wires at output terminals and have Factory Authorized
Service Agent check main control board PC1 or PC21.
Have Factory Authorized Service Agent check filter board PC5 and/or PC25 and connections.
Check fuse F2, and replace if open (see Section 8-10). Have Factory Authorized Service Agent check
brushes and slip rings, weld excitation circuit, and the rotor.
Disconnect equipment from generator power receptacles during start-up.
Reset supplementary protector CB4 (see Section 8-10).
Check fuses F1 and F2, and replace if open (see Section 8-10). Have Factory Authorized Service Agent
check integrated rectifier SR2, capacitor C6, and the rotor.
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
Check and tighten connections inside and outside unit.
Be sure connection to work piece is clean and tight.
Use dry, properly stored electrodes.
Remove excessive coils from weld cables.
Have Factory Authorized Service Agent check brushes and slip rings.
Check position of Voltage/Amperage Adjust control.
Have engine Factory Authorized Service Agent check engine speed.
Have Factory Authorized Service Agent check voltage feedback circuit.
Check position of Voltage/Amperage Adjust control.
Have engine Factory Authorized Service Agent check engine speed.
Check fuses F1 and F2, and replace if open (see Section8-10). Have Factory Authorized Service Agent
check integrated rectifier SR2, capacitor C6, and the rotor.
Place VRD switch S5 in Off position and try welding. If machine operates normally, have Factory Autho-
rized Service Agent check S5 and Main Control Board PC1 and PC21.
Have engine Factory Authorized Service Agent check engine speed.
Check position of Process/Contactor switch.
Have Factory Authorized Service Agent check IGBT Modules PM1, PM2, PM21, and PM22; check and
replace Main Control Boards PC1 and PC21.
Check and secure connections to Remote 14 receptacle (see Section 5-17).
Remedy
OM-267603 Page 65
Advertisement
Table of Contents
