ESAB PCM-875A Manual de servicio

558000-892 0202PLASMA CUTTINGCONSOLE/POWER SOURCESwith CE Compliances230 V, 50 Hz, 3-Phase400 V, 50 Hz, 3-PhasePCM-875Service Manual

103.3REFERENCE VOLTAGE CHECKSA. Control Board Assembly (PCB1)1. LED’sLED-1 - Torch SwitchLED-2 - High FrequencyLED-3 - Gas Solenoid Valve2. Voltage Te

11TORCH SWITCHOPEN CLOSEGAS SOLENOID VALVEPREFLOWFLOW SWITCH CLOSEFAULT OVERLOAD LIGHTHF CIRCUITINVERTERCUTTING ARC (CURRENT)3.4SEQUENCE OF OPERATIONA

1210 SEC PUSH RELEASE PUSH RELEASE TORCH SWITCH OPEN CLOSE GAS SOLENOID VALVEPOSTFLOW CLOSE OPEN FLOW SWITCH FAULT LIGHT

13D-36918Figure 3.1 - Schematic Diagram, PCM-875, 230 V, 50/60 Hz, 3-Phase

14D-36917Figure 3.2 - Wiring Diagram (Sheet 1 of 2), PCM-875, 230 V, 50/60 Hz, 3-Phase

15Figure 3.2 Wiring Diagram (Sheet 2 of 2), PCM-875, 220 V, 50/60 Hz, 3-PhaseD-36917

16Figure 3.3 - Schematic Diagram, PCM-875, 400 V, 50/60 Hz, 3-PhaseD-36604

17D-36605Figure 3.4 Wiring Diagram (Sheet 1 of 2), PCM-875, 400 V, 50/60 Hz, 3-Phase

18D-36605Figure 3.4 - Wiring Diagram (Sheet 2 of 2), PCM-875, 400 V, 50/60 Hz, 3-Phase

19Fig. 4-1. PCM-875 Power Source, Front ViewItem Qty. Part CircuitNo. Req. No. Description Symbol1 1 558000373 KNOB2 1 558000372 POT. 10K 2W (NOMEX IN

2WARNINGARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAU-TIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHIC

20Item Qty. Part CircuitNo. Req. No. Description Symbol21 1 558000626 BRIDGE 60ADC 100NS 600 V (PAD - 558000527) D122 1 558000634 CORE SATURABLE L323

21Item Qty. Part CircuitNo. Req. No. Description Symbol51 1 558000626 BRIDGE 60 ADC 100NS 600 V (PAD - 558000527) D152 1 558000634 CORE SATURABLE L353

22Fig. 4-4. PCM-875 Power Source, Right Side View (230 V)Item Qty. Part CircuitNo. Req. No. Description Symbol80 1 558000604 CONTROL TRANSFORMER ASS&a

23Item Qty. Part CircuitNo. Req. No. Description Symbol110 1 558000391 CONTROL TRANSFORMER ASS'Y T2111 1 558000655 RESISTOR ASS'Y PILOT ARC

24Item Qty. Part CircuitNo. Req. No. Description Symbol140 1 558000670 LABEL CNC INTERFACE141 1 558000671 TERM. BLOCK 7 POS 25 A TB4142 2 558000658 RE

25Item Qty. Part CircuitNo. Req. No. Description Symbol151 1 558000675 FILTER REGULATOR152 1 558000534 ADAPTOR B/A-WM x 1/4 NPTM153 2 558000592 HANDLE

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F-15-424-A 2/02 Printed in U.S.A.IF YOU DO NOT KNOW WHOM TO CALLTelephone: (800) ESAB-123/ Fax: (843) 664-4452/ Web:http://www.esab.comHours: 7:30 AM

3Rated 60% Duty Cycle* 60 A @ 120 V dcOutput 100% Duty Cycle* 50 A @ 120 V dcOutput Current Range 10 to 60 AmperesOpen Circuit Voltage 275 V dcRated P

42.1 GENERALIf this equipment does not operate properly, stop workimmediately and investigate the cause of the malfunc-tion. Maintenance work must b

52.4 FLOW SWITCH (FIGURE 2-2)When excessive contamination is found in the air, theflow switch (FS-4) should be disassembled and cleanedas follows:A.

6The cause of control malfunctions can be found byreferring to the sequence of operations and electricalschematic diagram (Figure 3-1 or 3-3) and chec

7C. The Power light is on, but nothing happens when the torch switch is depressed. Fault lightdoes not activate.NOTE: Unplug high frequency connection

8the ohmmeter should read a direct short. If not then it should read open.b. If the switch is defective, replace it. Clean the surface of the heat sin

9F. High Frequency and Pilot Arc are on but Main Arc does not transfer.1. Make sure work clamp is connected to work material.2. Check the torch. Repla