Troubleshooting and repair, Exciter voltage feedback test (continued) – Lincoln Electric COMMANDER 400 SVM133-B Manuel d'utilisation
Page 118
TROUBLESHOOTING AND REPAIR
EXCITER VOLTAGE FEEDBACK TEST (continued)
TEST PROCEDURE
1.
Set the machine to the following settings, then
start the machine:
Control dial to 1 (min)
Range dial to 90A max
Idler switch in the “Auto” position
Output control source (2-4) switch in the
“Welding Terminals Remotely Controlled”
position.
2.
As the unit powers up, the display will step thru
its’ initialization sequence. As soon as the dis-
play shows “---”, the user must toggle the idler
switch from “Auto” to “High” 5 times in 5 sec-
onds. The display will read “tal”, then “000”. The
idler switch must be returned to the “Auto” posi-
tion. If the user misses toggling the Idler switch
5 times in 5 seconds, the machine will default to
normal operation, and step 1 & 2 must be repeat-
ed.
3.
Toggle the 2-4 switch to the “Welding Terminals
Always On” position. The display will read the
phase 1 no load exciter voltage. The voltage
should be between 400-525 Vac. Return the 2-4
switch to the “Welding Terminals Remotely
Controlled” position.
4.
Toggle the Idler switch from “Auto” to “High”,
then back to “Auto”. The display should read
“001”. Repeat step 3 to read the phase 2 no load
exciter voltage.
5.
Toggle the idler switch from “Auto” to “High”,
then back to “Auto”. The display should read
“002”. Repeat step 3 to read the phase 3 no load
exciter voltage.
6.
For machines equipped with G2713-1 boards,
toggle the Idler switch once from “Auto” to
“High”. The display should read “003”. For
machines equipped with G2713-2 & 3 boards,
toggle the idler switch 3 times from “Auto” to
“High” to “Auto” till the display reads “000”
again.
7.
Turn the control dial to 10 (max). Toggle the 2-4
switch to the “Welding Terminals Always On”
position. Apply a grid load so that the machine’s
output is 565-585 amps at a minimum of 30 VDC.
The display will read the phase 1 exciter voltage
under load. Record the phase 1 exciter voltage
under load. Return the 2-4 switch to the
“Welding Terminals Remotely Controlled” posi-
tion.
8.
Toggle the Idler switch from “Auto” to “High”,
then back to “Auto”. The display should read
“001” (or “004” for machines equipped with
G2713-1 board). Repeat step 7 to read the
phase 2 exciter voltage under load.
9.
Toggle the idler switch from “Auto” to “High”,
then back to “Auto”. The display should read
“002” (or “005” for machines equipped with
G2713-1 board). Repeat step 7 to read the
phase 3 exciter voltage under load.
10. If all exciter voltage readings on the display are
correct, the exciter board is properly calibrated
and the test is complete. If the average of the
three exciter voltage readings under load is under
350VAC, then the board must be replaced.
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F-64
COMMANDER 400