9 Fault Maintenance 91 Frequent Fault Examination (Page 21 / 23) XPTHC-100 Plasma Arc-Voltage Controller

9、Fault Maintenance

9.1、Frequent Fault Examination

Serial

Malfunction

Cause

Resolution

Number

No display, black No +5V voltage on the Check +5V voltage VCC3

screen

voltage meter

No revolution of 1、 damage of drive 1、replace IR2110

generator or only

IR2110

one

direction 2、 drive voltage +15V， Check drive voltage VCC4

rotates.

failure

3、 protection

of D606 ∽ D609 （ IRF640 ） is

over-current

damaged or mechanical

blocked

Once open the 1.Proximity switch is Install the Proximity

power, the incision not installed well in switch perfectly

part continue to the

open-circuit

move up 。（NPN） condition

2、damage of Proximity Replace Proximity switch

switch

（signal：2mm，NPN）

Can not produce arc 1、damage of Proximity Replace Proximity switch

automatically

switch, no return

after the IHS

signal

2 、 IHS time is too Prolong the IHS switch

short, no return signal

Instability

of 1、check the connection with earth

controlling voltage 2、check the air-proof

3、over-sensitiveness