Miller Electric OM-842 - Manuel (Page 45)

OM-842 Page 41
position. If this is done in time and the position is work-
ing correctly, the display shows:
R U N P O S I T I O N
I S W O R K I N G P R O P E R L Y
If the Run position tests okay, go to Step 5.
4. If the keyed switch is not placed in the Run position in
time, or if the position is not working correctly, the dis-
play shows:
E R R O R ! ! R U N P O S I T I O N
I S N O T W O R K I N G
If the Run position is not working correctly, replace the
keyed switch.
5. When the Run position tests okay, press Parameter
Select. The display shows:
P L E A S E P U T K E Y I N
P R O G R A M P O S I T I O N
6. When this display appears, the control unit waits three
seconds for the keyed switch to be placed in the Pro-
gram position. If this is done in time and the position is
working correctly, the display shows:
P R O G R A M P O S I T I O N
I S W O R K I N G P R O P E R L Y
If the Program position tests okay, go to Step 8.
7. If the keyed switch is not placed in the Program position
in time, or if the position is not working correctly, the dis-
play shows:
E R R O R ! ! P R O G R A M
I S N O T W O R K I N G
If the Program position is not working correctly, replace
the keyed switch.
8. When the Program position tests okay, press Parame-
ter Select to exit the keyed switch tests. Use the
Right/Increase or Left/Decrease push button to access
another test, or stop the diagnostics program.
E. Output Selector Switch Test
This procedure tests the positions of the Output Selector
switch.
1. When the repeating test displays are shown (see Sec-
tion 7-2C), press Right/Increase or Left/Decrease until
the display shows:
A C / D C S W I T C H
T E S T
2. Press Parameter Select to begin the test.
3. Place Output Selector switch in ac position. If switch is
working properly, the display shows:
A C / D C S W I T C H I S I N
A C P O S I T I O N
4. Place Output Selector switch in either of the dc posi-
tions. If Process Selector switch is working properly,
the display shows:
A C / D C S W I T C H I S I N
D C – E P O R D C – E N
5. Place the switch in the ac position. The display indicat-
ing ac position should again be shown.
If the display changes to match the position of the Pro-
cess Selector switch, the switch is operating correctly.
If the display does not change to match the position of
the switch, replace the Output Selector switch.
6. When the Output Selector switch tests okay, press Pa-
rameter Select to exit the test. Use the Right/Increase
or Left/Decrease push button to access another test, or
stop the diagnostics program.
F. Mode Selector Switch Test
This procedure tests the positions of the Mode Selector switch.
1. When the repeating test displays are shown (see Sec-
tion 7-2C), press Right/Increase or Left/Decrease until
the display shows:
M O D E S W I T C H
T E S T
2. Press Parameter Select to begin the test. The display
shows:
P L E A S E T U R N K N O B T O
S M A W – M A N U A L P O S I T I O N
3. When this display appears, the control unit waits three
seconds for the Mode Selector switch to be placed in
the SMAW position. If this is done in time and the posi-
tion is working correctly, the display shows:
S M A W – M A N U A L P O S I T I O N
W O R K I N G P R O P E R L Y
If the SMAW position tests okay, go to Step 5.