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INVERTER BOARD VOLTAGE TEST (continued)
J11
to Input Bd
TEST PROCEDURE
Use always electrically insulate gloves during this test procedure
1. Apply 400Vac +/- 15% to the CITOTIG 315DC or 415DC
2. Turn the machine input switch to ON position, and wait till the power LED on front panel is steady 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 +/- 10% in Lift TIG mode, stand-by
condition (no OCV, no fan), thermal and any
overload condition.
1
VREG
• 0,6Vdc +/- 10% in stick mode during OCV
condition for 315DC
• 0,4Vdc in stick mode during OCV condition
for 415DC
• For 315DC:
50A=1Vdc_150A=3Vdc_300A=6Vdc
2
DUTY
• For 415DC:
50A=0,75Vdc_150A=2,2Vdc_400A=6Vdc
3
VRIF
4
-5V
• 0V= in stick mode
5
HFON-PK
• 7,5Vdc +/- 10% in LIFT and HF mode
6
SGND
• 6Vdc +/- 10% in stick mode in OCV condition
7
MIS_V
• 0,6 Vdc +/- 10% TIG modes in OCV
condition
8
I_LIM
9
300/400
0Vdc=300A
• 2Vdc=150A – 3,6Vdc=270A for 315DC
10
MIS_I
• 1Vdc=100A – 4Vdc=400A for 415DC
• 0V=normal value
11
TH1
• 14,5Vdc +/- 10% = thermic activated on
inverter board
12
+15V
E
E
G
C
C
G
E
E
W05X1327-1 on 315DC
W05X1327-2 on 415DC
Value (use SGND as 0V ref.)
Not used
-5Vdc
SGND
Not Used
5Vdc +/- 10% =400A
+15Vdc
C
G
E
E
E
E
G
C
Notes
+12Vdc = inverter OFF
Output current set signal
Not used
-5V power supply generated by the input board.
Signal for starting peak current in HF
(visible only with oscilloscope)
Secondary GND for power supply (0V ref.)
Output voltage feedback
Not used
Control board machine identification
Output current feedback
Thermostat on the inverter heat sink signal
+15V power supply generated by the input
board.
48
LD1
+15Vdc
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