Troubleshooting & repair, Warning – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual

Page 204

F-144

QUICK VOLTAGE CALIBRATION

(continued)

FIGURE F.54 - TEST AND CALIBRATION OVERLAY

TROUBLESHOOTING & REPAIR

PROCEDURE

1. Before changing or disturbing the display

board, power up the machine with the
L9660-255 Test and Calibration overlay in
place. See Figure F.54.

2. Press the Voltage Calibration function (32).

The machine should display the following:

VOLTAGE WIRE

+ POLARITY (+67A)

3. Press the Enter Key (133) on the lower right

side of the overlay. The machine should
display the following:

ADJUST TO 30V

CALIBRATION #=XX

NOTE: Here “XX” indicates a particular cali-
bration number for a given voltage sensing
point.

The machine’s output terminals will be electri-
cally “HOT” when the Enter Key is pressed.

4. Record the number displayed for the +67

wire and press the Enter Key (133) again.

5. Repeat the process by pressing the Voltage

Calibration function again. The next sens-
ing lead may be selected by pressing the
down Arrow Key (101). The above proce-
dure must be repeated six times to obtain
and record the calibration number for six
different voltage sensing points. These
points are the following:

+ Polarity (+67A)
+ Polarity (+67B)

- Polarity (+21A)
- Polarity (+21B)

+ Polarity

- Polarity

Install the “new” replacement display
board.

7. With the L9660-255 overlay installed, apply

power to the machine. Press the Voltage
Calibration function (32). Enter the re-
corded calibration numbers for each of the
six voltage sensing points. The calibration
numbers are entered by selecting the prop-
er sensing point (lead), pressing the Enter
Key (133) and obtaining the display that
reads:

ADJUST TO 30V

CALIBRATION #=XX

The calibration number is changed using the
up/down Arrow Keys (100, 101). Press the
Enter Key when the desired number is dis-
played.

8. Repeat the process for all six sensing

points (leads).

9. Perform the Sensor Calibration Test.

POWER WAVE 450