Lincoln Electric 11694 Service Manual page 43

®
POWER WAVE S350
LED'S 5 THRU 10
LED 4
LED 3
LED 2
DESCRIPTION
LED 1
LED 4
LED 3
LED 2
LED's 5 THRU 10
LED'S 5 Thru 10
These six LED's are used to indicate a turn-on of a chopper phase. Intensity of each LED is related to the on-time of each of the IGBT's .
LED 4
+15 Volt DC power supply for secondary control circuits.
LED 1
+48 Volt DC auxiliary power supply indicator.
LED 3
Boost IGBT drive.
LED 2
Buck IGBT drive.
SWITCH BOARD TEST
Figure F.14 – Switch board LED locations
Table F.5 – Switch board LED's
INDICATES
+48 VDC SUPPLY
+15 VDC SUPPLY
BOOST CIRCUIT ACTIVE
BUCK CIRCUIT ACTIVE
CHOPPER IGBTs ACTIVATED
TROUBLESHOOTING AND REPAIR
(continued)
LED 1
LIGHT
ON POWER APPLIED TO POWER
ON POWER APPLIED TO POWER
ON* * WHEN HIGH INPUT VOLTAGE IS
APPLIED (460 AND HIGHER) LED
3 MAY BE VERY DIM OR OFF.
ON** ** BRILLIANCE MAY VARY WITH
ON*** *** BRILLIANCE WILL VARY WITH
LOAD AND OUTPUT.
CONDITIONS
WAVE S350
WAVE S350
LOAD.
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