Lincoln Electric IM10057 POWER WAVE STT MODULE (CE) - Manual (Page 25)

E-5 TROUBLESHOOTING E-5
POWER WAVE ® STT ® MODULE (CE)
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
MACHINE
OUTPUT
ON/OFF
ON
ON
ON/OFF
LED1
(GATE)
ON
OFF
OFF
OFF
LED2
(STATUS)
ON
ON
OFF
OFF
LED3
(+15V)
ON
ON
ON
ON/OFF
STT SWITCH PC BOARD
ON BOARD LEDʼS FOR THE STT SWITCH PC BOARD
INDICATION
Normal Condition – STT ® Switch is ON.
Normal Condition – STT ® Switch has been commanded OFF.
Note: During normal STT ® operation the OFF state of the LED
may only be detectable as a slight dimming.
Status Failure (only when triggered). Should be accompanied by
Error 99 on the external STT Module Status LED. Most likely
caused by weld cable misconnection (reverse polarity).
Status Failure (constantly). Should be accompanied by Error 99
on the external STT Module Status LED. Most likely caused by the
on board power supply under-voltage lockout. Verify input voltage
to the STT Switch board.
G6768-1
STT SWITCH
C1
C2
LED2
LED3
LED1
B1 B2 B3 B4
B5 B6 B7 B8
B9
J3
J2
J1
DIFFERENTIAL I/O
(STT SWITCH SIGNAL)
STT STATUS
(OUTPUT) INPUT POWER
(40 VDC)
STT IN
(B1 - B4)
STT OUT
(B5 - B8)
SNUBBER