10.3.7
E007 Input Voltage Too Low
Fatal, meaning you have to power down to continue welding
Yes
Acknowledge, meaning the error will exist as long as the unit is
powered on.
(Note, welding can continue while the error exists)
No
Description:
When power is initially applied to the system, it goes through a series
of relay
closures / opens and watches the primary voltage closely. If the
voltage is sensed to
be too low (<225VDC on the capacitor banks” - J1
on each switch board of the
N1500i, J1, J4 of the N800i), the unit will re-
main in this state. The system must be
powered down and examined/
fixed prior to anything else. That is, no welding can be
done in this state.
Likely problems or items to check - in order from most likely to least
likely:
1. Measure the primary voltage and make sure it is within the correct range as
defined by the voltage setting on the back of the
unit.
2. Improper adjustment of voltage-to-frequency circuit to switch
board. Each switch
board has a pair of wires to provide an open-
collector signal to the control board.
These pairs carry a near 15V
signal with a frequency in the 3000Hz range that
represents the
primary voltage. The signal is controlled by the switch board,
which provides an optocoupled linear voltage-to-frequency
signal to the control
board for sensing. If this frequency is below
1000Hz, it will be read by the control
as zero (0Hz). Relationship
is [y=0.0904x+0.28 where x= Vin/10 and y= freq in
KHz]. Once this
condition occurs, the control may not update the frequency on
the display. The reading must be in the normal range for this
adjustment to be
made. As you turn the potentiometer on the
switch board to adjust the V-F
measurement, observe F18 on the
user interface on both left and right sides to
tune it in to the
measured voltage on J1 of the switch board. Press the time up/
down arrows to switch from left/right measurements and to dis-
play. If this error
occurs and you suspect an adjustment is needed, turn the potentiometer to half
way of the full scale and tune
from there. You'll have to get past this error to tune
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