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OM-1500-1 Page 27
8-2. Diagnostics
LED3-Related Error Indications
Error conditions are indicated by LED3 on
PC1. To view LED3, turn Off unit, remove
wrapper, and turn unit On. LED3 is most easily
observed from the left side of the unit.
The LED blinks in a 2.5 second cycle. The
number of blinks in this period indicates the
type of error.
The priority of the errors is related to the num-
ber of blinks indicating the error. The more
blinks, the more severe the error (motor error
is top priority). A higher priority error overrides
a lower one (if a motor error and a communica-
tion error existed, the light would blink four
times for the motor error).
Since blink On time and blink Off time are
equal in a four-blink cycle, the four–blink se-
quence appears as a constant blink.
1 blink = Communication Error
2 blinks = Trigger Error
3 blinks = Tach Error
4 blinks = Motor Error
• The communication error occurs 2.5 sec-
onds after a loss of communication between
the motor and front panel boards. The user
may continue to weld with this error. The er-
ror may be cleared by resetting the unit (see
Section 5-10).
• The trigger error occurs if the user has the
trigger held for more than two minutes with-
out striking an arc (providing current over-
ride is not enabled), or if the user holds the
trigger past the postflow phase in a timed
weld. This error also occurs if the trigger is
held when the feeder is powered up. The er-
ror may be cleared by releasing the trigger.
• The tach error occurs 2 seconds after the
loss of tachometer feedback. The user may
continue to weld with this error. The motor
speed is regulated through the monitoring of
voltage and current.
• The motor error indicates that the motor
has been drawing too much current for too
long. To remedy this, reduce the wire feed
speed or the wire feeder torque load/duty
cycle.
Additional Error Messages (Additional
hardware required for these to be
functional)
Gas flow error: indicates no gas flow is de-
tected. Connect a gas supply or remedy the
problems not allowing gas to flow.
Coolant flow error: indicates no coolant flow is
detected. Connect a coolant system or reme-
dy the problems not allowing coolant to flow.
Ref. 802 687
ERR
COMM
ERR
TRIG
ERR
TACH
ERR
MTR
The following error messages are shown on the
upper and lower displays to indicate specific errors.
Explanations are in the text below:
ERR
GAS
ERR
COOL
Indicates a
communication
error.
Indicates a trigger
error.
Indicates a
tachometer error.
Indicates a motor
error.
No gas flow
detected.
No coolant flow
detected.
1
Front panel is shown removed for purpose of
illustration only. In actual use, front panel
would be in place.
3
1 Wrapper
2 Motor Control Board PC1
3 LED3
4 DIP Switch S1
. There is a two-position
DIP switch S1 located
on motor control board
PC1. These switches
are factory-set in the
off position and must
remain in that position
for the unit to operate
correctly.
2
4