Lincoln Electric CITOTIG 315DC Service Manual page 54

CONTROL BOARD TEST (continued)
LD1
+15Vdc
LD2
+5Vdc
J3
to display
board
CITOTIG 315DC CE
CITOTIG 415DC CE
TEST PROCEDURE
Use always electrically insulate gloves during this test procedure
The following tests must be performed with the control board installed inside the machine and
with all harnesses connected.
1. Apply 400V +/- 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 LD1 and LD2, they must be lit all the time.
4. Follow the below tables to perform the control board test :
J2: Control/Input connector
Pin# Description
1 +15V
2
SGND
• 0Vdc=Water flow OK
3
FLOW
• 15Vdc= Water flow KO (Err 11 on display)
• 2Vdc=150A – 3,6Vdc=270A for 315DC
4 MIS_I
• 1Vdc=100A – 4Vdc=400A for 415DC
• 6Vdc +/- 10% in stick mode in OCV
condition
5 MIS_V
• 0,6 Vdc +/- 10% TIG modes in OCV
condition
• 0V= in stick mode
6
HFON-PK
• 7,5Vdc +/- 10% in LIFT and HF mode
• +12Vdc +/- 10% in Lift TIG mode, stand-by
condition (no OCV, no fan), thermal and
any overload condition.
7 VREG • 0,6Vdc +/- 10% in stick mode during OCV
condition for 315DC
• 0,4Vdc in stick mode during OCV condition
for 415DC
Machine:
Value (use SGND as 0V ref.)
+15Vdc
SGND
1 2 3
Off Off Off
Off Off Off
Notes
+15Vdc generated by input board
Secondary GND for power supply (0V ref.)
Water flow signal from coolarc->input board
Output current feedback
Output voltage feedback
Signal for starting peak current in HF
(visible only with oscilloscope)
+12Vdc = inverter OFF
55
J1
to input Board
J4
to front panel
remote
connector
4
Off
Off