ESAB MultiPower 460 Pulse Manuál s instrukcemi stáhnout pdf (Strana 45)

SECTION 5 MAINTENANCE

Table 5-1. Troubleshooting Guide

CONDITION ACTION

Unit Inoperative

No input power. Check main line (user’s) switch fuses -- replace if

needed.

Poor or improper input (terminal board) connections.

Defective on/oﬀ switch -- replace.

Thermal light on. Main transformer overheating. Also check for prop-

er cooling, proper primary hookup, or shorted turn on secondary.

Loss of primary phase. Find & replace defective fuse.

READY/ ON Light is OFF See Figure 5-2

Fan Does Not Run See Figure 5-3

(READY Light is ON)

No Output -- Fan Running

Poor or improper electrical input -- check input connections on TB.

Poor connections at output terminals/work station -- check, tighten

or replace.

Main transformer overheating -- thermal switches tripped due to re-

stricted cooling air. Temperature light on front panel will be lit. Let

unit cool down.

PC board defective or loose PC board connector(s) -- if loose, reinsert;

if defective, replace.

No Output - STICK Position See Figure 5-4

Meter Display is Blank See Figure 5-5

Preset Does Not Function See Figure 5-6

Ammeter Displays 760 Amps See Figure 5-7

Limited Output or

Low Open-Circuit Voltage

Input voltage jumper links on terminal board improperly set -- check

for proper voltage.

Poor output connections. Take apart, clean, and reassemble.

Panel-Remote switch in Remote position and remote voltage pot dis-

abled.

Over Temperature Light is ON See Figure 5-8

Erratic Weld Current

Welding cable size too small -- use correct cables.

Loose welding cable connection (will usually get hot) -- tighten all

connections.

Improper wire feeder setup.

PC board defective -- replace.

High Output, No Voltage Control

PC board defective or loose -- reset and/or replace board.

Shorted I.G.B.T. - Replace I.G.B.T. and check driver PCB.

No 115 Volt ac Output

Circuit breaker tripped. Check 115V CB2 -- Reset.

Line Fuse Blows When Power

Source is First Turned On

Shorted DIODE in Main Bridge -- replace.

Shorted capacitor in Capacitor Bank.

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 68 69

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