Thermal Arc 300GTSW Pro-Wave, Руководство по обслуживанию

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pro-wave 300gtsw
June 21, 2012
5-5
M. Limited Weld Output
1. Poor primary input voltage
a. Check primary input voltageis within ±10% of
nominal voltage, i.e. 230VAC ±10%.
2. Faulty Current Transformer (CT1)
a. Check continuity and signals to current
transformer CT. Refer to tests in section 6.05,
page 6-4, and section 6.20, page 6-22
N. Erratic or Improper Weld Output
1. Loose welding cable connections
a. Tighten all welding cable connections.
2. Improper setup
a. Check for proper connection of input power.
b. Perform Front Panel Test Point Voltage
procedure, section 6.17, page 6-19.
3. Faulty Remote Device
a. Check all remote devices and repair or replace
if necessary.
4. Faulty Current Transformer (CT1)
a. Check continuity and signals to current
transformer CT. Refer to section 6.05, page 6-4,
measuring between pins 3 and 4, and section
6.20, page 6-22.
5. Tungsten condition is poor, causing discoloration
of workpiece
a. Replace electrode.
O. No Weld Output; Fan Not Operating; WARNING
Indicator OFF
1. Line voltage too low
a. Verify that input voltage matches setting on
rear panel INPUT SELECTOR switch.
b. Verify the INPUT SELECTOR (Easy Link) switch
is functioning properly by performing test in
section 6.05, page 6-3.
2. Loose connection on Main Circuit Board (PCB1)
a. Verify all connections.
3. Faulty Main Circuit Board (PCB1)
a. Verify gate drive signals from Main Circuit
Board by performing Gate Drive Enable Signal
test in section 6.11, page 6-10.
4. Faulty output diodes
a. Perform PCA Output Diode test in section 6.29,
page 6-32.
5. Faulty IGBT Inverter Module(s)
a. If there is weld output in AC output mode but
not DC, perform PCA IGBT Inverter test on Q3,
section 6.26, page 6-26.
P. Unit will not change polarity from AC to DC or DC
to AC.
a. Turn the post-flow control to minimum and
try again. The post-flow circuit must be timed
out before the unit will recognize a change in
status.