Hypertherm MAX200 Machine Torch Plasma Arc Cutting System User Manual download pdf (Page 115)

5-4 MAX200 Instruction Manual

MAINTENANCE

Problem: The green POWER ON pushbutton switch PB1 is pressed, the green POWER ON

indicator illuminates, but the fans are not operating.

Cause: Fuse F2 on the power distribution board PCB6 is blown.

Solution: Replace fuse F2.

Cause: Relay CR2 on the power distribution board is defective.

Solution: Replace relay CR2.

Problem: The fans are operating, the green POWER ON indicator is illuminated, and the torch

switch is pressed, but the DC ON indicator does not illuminate.

Cause: The torch switch or the switch connections are defective.

Solution: Check the torch switch connections on TB2 for loose or broken wiring.

Replace the torch start switch.

Cause: The contactor CON1 is defective.

Solution: Replace contactor CON1

Cause: The control board PCB7 is defective.

Solution: Replace control board PCB7.

Problem: The green POWER ON indicator is illuminated, the torch switch is pressed and DC ON

indicator illuminates, but there is no high frequency and no pilot arc.

Cause: There is no spark between the spark gap electrodes.

Solution: Clean (with emery cloth), align, and/or regap (.020" per gap) the electrodes if necessary. Ensure

the electrode surfaces between the gaps are flat. If they are rounded, replace and regap. The

two outside electrode assemblies are part no. 004061; the inside electrode assembly is part no.

004089.

Solution: Visually inspect the high voltage transformer T5 for leaking oil or overheating. If either of these

conditions exist, replace T5.

Solution: Visually inspect the electrical connections at connectors PL26/REC26 (T5), TB3-60 and 61, and

pins 3 and 4 at connectors PL6/REC2 (PCB7). Repair or replace any defective connectors or

wires.

Solution: Disconnect the PL26/REC26 connectors and connect an external 120 VAC power source to

REC26 connector pins. If a spark is observed across the spark gaps, replace control board

PCB7.

If a spark is not observed across the gaps, remove capacitors C7 and C8. If a faint spark is now

observed across the gaps, replace T5 and reconnect the capacitors. If a spark is not observed

replace C7 and C8. (Always replace the capacitors in pairs).

1 2 ... 110 111 112 113 114 115 116 117 118 119 120 ... 186 187

No comments

Hypertherm MAX200 Machine Torch Plasma Arc Cutting System User Manual Page 115