Miller D-74D 소유자 매뉴얼 - 페이지 27

{카테고리_이름} Miller D-74D에 대한 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Miller D-74D 36 페이지. Control box

7-3. Troubleshooting

Trouble

Wire feeds, shielding gas flows, but

electrode wire is not energized.

Wire feeder is on, display does not light

up, motor does not run, gas valve and

welding power source contactor do not

pull in.

Electrode wire feeding stops or feeds

erratically during welding.

Motor runs slowly.

Wire feeder power is on, displays light

up, but unit is inoperative.

Check cable connections. Check cables for continuity, and repair or replace cables if necessary

(see Section 5-2).

Check and reset circuit breaker at welding power source.

Check gun trigger connection. See gun Owner's Manual.

Check gun trigger. See gun Owner's Manual.

Change to correct size drive roll (see Table 9-1).

Clean or replace dirty or worn drive roll.

Incorrect size or worn wire guides.

Replace contact tip or liner. See gun Owner's Manual.

Remove weld spatter or foreign matter from around nozzle opening.

Have Factory Authorized Service Agency check drive motor or motor control board PC1.

Check for correct input voltage.

Check welding gun trigger leads for continuity, and repair leads or replace gun.

Disconnect power before troubleshooting.

Remedy

OM-252717 Page 23