Diagnostics - Miller PipePro 450 RFC Owner's Manual

7-2. Diagnostics

The following error messages are shown on the
upper and lower displays to indicate specific errors.
Explanations are in the text below:
ERR ERR
ARC GND
Indicates an arc Indicates a ground
error. current error.
PLS ERR
WAIT SENS
Indicates no ocv.
Indicates a UIM
communication error.
ERR ARC
• The arc error indicates an arc outage
occurred possibly from a wire feeder error
or power source error. Check wire feeder
and power source. Press any button on
front panel to clear error.
ERR GND
• The ground current error occurs if weld
current is detected in the earth ground
connection. May be caused by a conductor
making contact with unit chassis. Check
and repair feeder weld connections. Press
any button on front panel to clear error.
ERR LINE
• The line error indicates input power is
outside of unit operating range. Check and
correct input power. Cycle power to clear
error.
ERR STRT
• The start error occurs if the user has the
trigger held for more than 3 seconds without
striking an arc and Start Err is enabled. This
error also occurs if trigger jog runs for 30
seconds or more. The error may be cleared
by releasing the trigger, and pressing any
button on the front panel.
OM-221 771 Page 36
ERR ERR
LINE STRT
Indicates a line Indicates an arc
error. start error.
E ERR
STOP UNKN
Indicates an Indicates an
emergency stop error. unknown error.
ERR STUK
• The stuck error occurs if the welding wire
sticks to the workpiece at the end of a weld.
May be caused by poor weld conditions.
The error may be cleared by cutting wire
from workpiece, and pressing any button on
the front panel.
ERR TEMP
• The temperature error indicates welding
power source has overheated
shutdown. The error may be cleared by
allowing unit to cool down, and cycle power
to clear error.
PLS WAIT
• The uim communication error indicates
user interface module PC7 lost data
communications. Press any button on front
panel to clear error.
ERR SENS
• The sensing error indicates no ocv when
operating with electrode negative in Stick,
TIG, or Carbon Arc. Remove volt sense
lead and press any any button on front panel
to clear error.
ERR
STUK
Indicates a wire
stuck error.
OVER
CRNT
Indicates an
overcurrent error.
E STOP
• The emergency stop error indicates no
connection is made to the 72-pin connector
on the rear of the unit. Connect "Y" cable to
rear of welding power source.
ERR UNKN
• The unknown error indicates a malfunc-
and
tion in the system somewhere. Press
Jog/Purge button to clear error. Leave the
unit powered up for five minutes and then
turn on the contactor to clear thr fault.
OVER CRNT
• The over current error indicates welding
power source primary current of the inverter
is too high. Turn welding power source off
and disconnect unit
Attempting to reset the display to continue
welding may further damage internal
components. Contact nearest factory
authorized service agent.
ERR
TEMP
Indicates a
temperature error.
for servicing.