Miller Electric OM-842 - Manuel (Page 46)

OM-842 Page 42
4. If the Mode Selector switch is not placed in the SMAW
position in time, or if the position is not working correct-
ly, the display shows:
E R R O R ! ! S M A W – M A N U A L
I S N O T W O R K I N G
If the SMAW position is not working correctly, replace
the Mode Selector switch.
5. When the SMAW position tests okay, press Parameter
Select. The display shows:
P L E A S E T U R N K N O B T O
G T A W – M A N U A L P O S I T I O N
6. When this display appears, the control unit waits three
seconds for the Mode Selector switch to be placed in
the Manual GTAW position. If this is done in time and
the position is working correctly, the display shows:
G T 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 Manual GTAW position tests okay, go to Step 8.
7. If the Mode Selector switch is not placed in the Manual
GTAW position in time, or if the position is not working
correctly, the display shows:
E R R O R ! G T A W M A N U A L
I S N O T W O R K I N G
If the Manual GTAW position is not working correctly,
replace the Mode Selector switch.
8. When the Manual GTAW position tests okay, press Pa-
rameter Select. The display shows:
P L E A S E T U R N K N O B T O
G T A W S E M I – A U T O
9. When this display appears, the control unit waits three
seconds for the Mode Selector switch to be placed in
the Semi-Automatic position. If this is done in time and
the position is working correctly, the display shows:
S E M I – A U T O 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 Semi-Automatic position tests okay, go to Step 11.
10. If the Mode Selector switch is not placed in the
Semi-Automatic position in time, or if the position is not
working correctly, the display shows:
E R R O R ! ! S E M I – A U T O
I S N O T W O R K I N G
If the Semi-Automatic position is not working correctly,
replace the Mode Selector switch.
11. When the Semi-Automatic position tests okay, press
Parameter Select. The display shows:
P L E A S E T U R N K N O B T O
G T A W – A U T O P O S I T I O N
12. When this display appears, the control unit waits three
seconds for the Mode Selector switch to be placed in
the Automatic position. If this is done in time and the po-
sition is working correctly, the display shows:
G T A W – A U T O 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 Automatic position tests okay, go to Step 14.
13. If the Mode Selector switch is not placed in the Auto-
matic position in time, or if the position is not working
correctly, the display shows:
E R R O R ! ! G T A W A U T O
I S N O T W O R K I N G
If the Automatic position is not working correctly, re-
place the Mode Selector switch.
14. When the Automatic position tests okay, press Param-
eter Select to exit the Mode Selector switch test (the
Reset position is not tested). Use the Right/Increase or
Left/Decrease push button to access another test, or
stop the diagnostics program (see Section 2-4).
G. Purge Push Button Test
This procedure tests the purge push button.
1. When the repeating test displays are shown (see Sec-
tion 7-2C), press Right/Increase or Left/Decrease until
the display shows:
P U R G E B U T T O N
T E S T
2. Press Parameter Select to begin the test. The display
shows:
P L E A S E P U S H
P U R G E B U T T O N
3. When this display appears, the control unit waits three
seconds for the Purge push button to be pressed. If this