Lincoln Electric POWER WAVE STT Operator's Manual page 23

POWER WAVE ® STT ® MODULE
MACHINE LED1
OUTPUT (GATE)
ON/OFF ON
ON OFF
ON OFF
ON/OFF OFF
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.
Observe all Safety Guidelines detailed throughout this manual
ON BOARD LED'S FOR THE STT
STT
®
LED2 LED3
(STATUS) (+15V)
ON ON Normal Condition – STT
ON ON Normal Condition – STT
Note: During normal STT
detectable as a slight dimming.
OFF ON Status Failure (only when triggered). Should be accompanied by Error 99 on the
external STT
tion (reverse polarity).
OFF Status Failure (constantly). Should be accompanied by Error 99 on the external
ON/OFF
STT
under-voltage lockout. Verify input voltage to the STT
SWITCH PC BOARD
®
SWITCH PC BOARD
® Switch is ON.
® Switch has been commanded OFF.
® operation the OFF state of the LED may only be
Module Status LED. Most likely caused by weld cable misconnec-
®
Module Status LED. Most likely caused by the on board power supply
®
CAUTION
E-5
TROUBLESHOOTING
INDICATION
Switch board.
®