Lincoln Electric INVERTEC 270SX Service Manual page 43

Cutting mode
selection
Mode
selection
button
J22
To Input bd
uController
Hot Start
potentiometer
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. Follow the below tables to perform the tests and understand error codes:
J22: Control/Input connector
Pin# Description
1 +15V
2 SGND
3 GASERR
•
3,6Vdc=270A for 270SX
4 I_EL
•
4Vdc=400A for 400SX
•
3,9Vdc in any stick modes
5 V OUT Ref
•
0Vdc in Lift Tig mode
6 SGND
In any stick modes
7 VREG-NOZ For 270SX: 50A=1,5Vdc_270A=7,2Vdc
For 400SX: 50A=1Vdc_400A=8Vdc
8 REMSIGN
9 READY_OK
• 0V during normal operation condition
10 SW_CTRL
• 0V=normal value
• 9,7Vdc +/- 10% = thermic activated on inverter
11 TH1
board
•
For 270SX:
50A=1,4Vdc_150A=4Vdc_270A=7,2Vdc
12 DUTYCUT
•
For 400SX:
50A=1,0Vdc_200A=4Vdc_400A=8Vdc
13 /PIP
14 SDINVB
15 TH2
16 /TR
17 SOL
• 0V=Fan OFF
18 FAN
• 1,6Vdc=Fan ON
19 ARCINITIATED
20 ICUT_CLP
21 BBST
22 CE/US
23 ACLOSS
24 TA
CONTROL BOARD TEST (continued)
SW2
SW2 setup for CE machines:
®
270SX or 400SX
Idle Value/Ref
+15Vdc
SGND
-
SGND
-
• +5Vdc only during Power Up sequence
-
-
-
-
-
-
5Vdc= CE version
+5Vdc
-
SW2 setup for AUS machines:
+15V power supply generated by the input board
Secondary GND for power supply (0V ref.)
Electrode Current feedback from HCS2
Only in stick modes Stand-by condition during OCV
Secondary GND for power supply (0V ref.)
In LIFT TIG mode (stand-by) = 12Vdc
If +5Vdc are present means that something not normal is detected by the
input board, like power supply out of range.
Thermostat on the inverter heat sink signal
Inverter TA signal (only for factory test)
Page 43
V - A LEDs
Notes
Not used
Not used
Not used
Output current set signal
Not used
Not used
Not used
Not used
Not used
Fan signal
Not used
Not used
Not Used
Machine version
Always
Operative
LEDs
V –A push
button
Output
current
potentiometer
Arc Force
potentiometer
J25
to remote board