CEBORA S.p.A.
14
3.3.8
- In resistive load operation, the output voltage is not regular.
OPEN-CIRCUIT OUTPUT VOLTAGE TEST.
Output terminal –(G) power source (-) and output te(H) power source (+) = voltages
per table:
Correct?
Correct?
Process Voltage
Condition
MIG
+109 Vdc
Start button pressed
TIG
+95 Vdc
Power source powered or start button pressed
MMA
+109 Vdc
Power source powered
Correct?
YES
NO
♦
Perform the test of par. 3.3.7.
NOTE
For the following tests use a resistive load capable of withstanding the maximum power
source current. The appropriate values are shown in the table.
Process Resistor
resistive load
Maximum output
current
Power source
output voltage
Condition
MIG
0,14 ohm
160 Adc
+ 22 Vdc
Start button pressed
TIG
0,10 ohm
160 Adc
+ 16,4 Vdc
Start button pressed
MMA
0,19 ohm
130 Adc
+ 25,2 Vdc
Power source powered
OUTPUT VOLTAGE TEST ON RESISTIVE LOAD.
Output terminal –(G) power source (-) and output te(H) power source (+) = voltages
per table:
NO
YES
♦
Correct operation.
POWER BOARD (32) POWER SUPPLY TEST.
Power board (32), connector J6, terminals 1(+) and 4(-), voltage = +300 Vdc approximately,
constant also during output voltage generation time, as an example during table conditions.
YES
NO
♦
Make sure power board (32) power supply, performing, if necessary, tests of par.
3.3.1.
♦
Check wiring between J1 control board (29) and J1 power board (32),
♦
With power source off, temporarily disconnect connector J1 from control board
(29) and make sure the resistance between terminal 3 of the connector
disconnected from J1 and terminals 3 of J7 on control board (29) (precharge rele
coil). Corrected value = approximately 1 Kohm in both measure senses. If not
correct check the wiring between J7 control board (29) and J4 power board (32)
and if necessary replace the RL1 rele and check the PTC1conditions on power
board (32).
3.302.233
22/09/2008
