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INVERTER BOARD VOLTAGE TEST (continued)
J11
to input bd
TEST PROCEDURE
1. Apply 400V +/- 15% to the INVERTEC
2. Turn the machine input swith to ON position, and wait till the power LED on front panel is stady green.
3. Check for 564Vdc +/-15% between terminals POS and NEG to be sure that the inverter is correctly supplied from
the input board.
4. Follow the below tables test to perform the voltage tests on connectors:
J11: Inverter/Input connector
Pin#
Description
• +12Vdc in Lift TIG mode, stand-by
condition (no OCV, no fan), thermal and
any overload condition.
• 0,7Vdc in any stick mode during OCV
1
VREG
condition for 270SX
• 0,4Vdc in any stick mode during OCV
condition for 400SX
• For 270SX:
50A=1,4Vdc_150A=4Vdc_270A=7,2Vdc
2
DUTY CUT
• For 400SX:
50A=1,0Vdc_200A=4Vdc_400A=8Vdc
3
TA
4
-5V
• 0V=normal value
• 9,7Vdc +/- 10% = thermic activated on
5
THD
output board
6
SGND
7
Not Used
8
SDINVB
9
ICUT_CLP
• 3,6Vdc=270A for 270SX
10
I_EL
• 4Vdc=400A for 400SX
• 0V=normal value
• 9,7Vdc +/- 10% = thermic activated on
11
TH1
inverter board
12
+15V
W05X0857-4 on INVERTEC 270SX
W05X0857-5 on INVERTEC 400SX
®
270SX or 400SX
Value (use SGND as 0V ref.)
-
-5Vdc
SGND
-
-
-
+15Vdc
+12Vdc switch the inverter OFF.
Output current set signal
Inverter TA signal (only for factory test)
-5V power supply generated by the input board.
Thermal tab on the output heat sink
Secondary GND for power supply (0V ref.)
Not used
Not used
Electrode Current feedback from HCS2
Thermostat on the inverter heat sink signal
+15V power supply generated by the input board.
Page 38
BLUE= V
at 60A/105V output
CE
RED = V
60A/105V output
GE at
Notes
-
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Table of Contents
Troubleshooting
