ESP MP-600 Spécifications télécharger pdf (Page 48)

SECTION 6 Troubleshooting

ESP 400C and 600C Plasma Power Sources

6-10

6.3.5 Fuses F1 and F2 Blown

Problem Possible Cause Action

Fuses F1 and F2 blown. Process controller ignites pilot arc

too soon after providing the

“Contactor On” signal

Faulty negative (Electrode) output

cable shorting to earth ground.

Shorted freewheeling diode.

One or more shorted diode

rectifiers (D13-D18) on “POS

Plate”.

One or more shorted diode

rectifiers (D7-D12) on “NEG

Plate”.

Process controller must allow at

least 300MS to lapse between

the application of the “Contactor

On” signal and the ignition of the

pilot arc. Fix process controller

logic and replace diodes.

Repair cable

Replace shorted freewheeling

diode and F1-F2

Replace all diode rectifiers on the

“POS Plate”.

Replace all diode rectifiers on the

“NEG Plate”.

6.3.6 Intermittent, Interrupted or Partial Operation

Problem Possible Cause Action

Works OK at 250A or less- Over

current – Faulty Left Side

Loose or unplugged connector at

left PWM/Drive PCB (PCB2)

Faulty left PWM/Drive PCB

Check voltage between P5-1 and

P5-2 at the left PWM/Drive PCB

(PCB2). Should be 20V AC.

Between P5-1 and P5-3 should

be 40V AC. If not the control

transformer (T5) is faulty.

Secure connector

Replace right PWM/Drive PCB

P/N 38030

Replace control transformer T5

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ESP MP-600 Spécifications Page 48

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