Miller Electric DS-2 Owner's Manual page 19

Trouble
Fan in welding power source not oper-
ating. Note: fan runs only when cool-
ing is necessary.
Wire does not feed, unit completely
inoperative.
Wire does not feed.
Wire feeds erratically.
Wire feeds when Jog switch is pressed
but not when gun trigger is pressed.
Wire feeds as soon as power is applied. Check gun trigger.
Wire does not feed until trigger is
pressed, but continues to feed after
trigger is released.
Gas valve rattles loudly and wire feeds
slowly or erratically.
Gas does not flow; wire feeds.
Check for and remove anything blocking fan movement.
Have Factory Authorized Service Agent check fan motor.
Check 10–pin plug PLG8 connections (see Section 3-7).
Check input power.
Check circuit breaker CB2 on welding power source, and reset if necessary (see welding power source
owner's manual).
Check gun trigger connection at wire feeder (see Section 3-9). Check gun trigger leads and trigger
switch.
Have Factory Authorized Service Agent check drive motor, control board PC1, and motor board PC2.
Readjust hub tension and drive roll pressure (see Section 3-11 and 3-12).
Use correct size drive roll (see Parts List).
Clean or replace dirty or worn drive roll (see 3-4 Section).
Remove weld spatter around nozzle opening.
Replace contact tip or liner.
Have Factory Authorized Service Agent check drive motor and control board PC1.
Check gun trigger connection at wire feeder (see Section 3-9). Check gun trigger leads and trigger
switch.
Check position of Mode switch on welding power source. This is normal operation when switch is in
Crater Fill On or Trigger Hold On positions (see welding power source owner's manual).
Check for short between gun trigger leads and weld cable. Repair or replace gun trigger leads.
Check for short between gun trigger leads and weld cable. Repair or replace gun trigger leads.
Check gas valve and flowmeter.
Remedy
OM-197 509 Page 15