Lincoln Electric CITOTIG 315DC Service Manual page 44

INPUT BOARD VOLTAGE TEST (continued)
J2: Input/Control 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
• +15Vdc in Stick and Lift TIG mode
8 HVPON
• 0Vdc in TIG HF mode
• +5Vdc only during Power Up sequence
9 READY_OK
• 0V during normal operation condition
• +15Vdc in Stick mode
10 COOLER
• 0V in both TIG modes
• 0V=normal value
11 TH1
• 15Vdc +/- 10% = thermic activated on
inverter board
• For 315DC:
50A=1Vdc_150A=3Vdc_300A=6Vdc
12 DUTY
• For 415DC:
50A=0,75Vdc_150A=2,2Vdc_400A=6Vdc
13 LS 23Vdc +/- 10% in OCV condition
14 ILIM
• 0V=normal value
15 TH2
• 15Vdc +/- 10% = thermic activated on
output board
• 13Vdc +/- 10% any modes in stand-by
16 /TR
• 0Vdc = trigger pushed
• 24Vdc +/- 10% = gas solenoid OFF
17 SOL
• 0Vdc = Gas solenoid ON
• 0V=HF OFF
18 HF
• 15Vdc +/- 10% = HF ON (only for 3
seconds after trigger pushed)
19 SGND
20 300/400 0Vdc=300A
• +24Vdc +/- 10% = FAN OFF
21 FAN
• 0Vdc = FAN ON
22
FAN DRIVE
• +5Vdc +/- 10% with FAN OFF
23 FAN SPEED
• 0Vdc with FAN ON
24
VRIF
Value (use SGND as 0V ref.)
+15Vdc
SGND
Not Used
SGND
5Vdc +/- 10% =400A
+5V any condition
Not Used
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
Only when in TIG HF mode +15Vdc are applied
to pin 1 of HF connector
Cooler ON/OFF
Thermostat on the inverter heat sink signal
Output current set signal
Lift TIG mode detection signal
Not Used
Thermostat on the output heat sink signal
Trigger signal
Gas solenoid ON/OFF
HF ON/OFF
Control board machine identification
FAN ON/OFF
Not used
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