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V300-PRO
TROUBLESHOOTING & REPAIR
F-62 F-62
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RETEST AFTER REPAIR
Should a machine under test be rejected for any reason requiring the removal of any mechanical part that could
affect the machine’s electrical characteristics, or if any electrical components are repaired or replaced, the machine
must be retested.
NOTE: 50 Hz machines may be tested using 60 Hz power.
INPUT IDLE AMPS AND IDLE WATTS
Input Single Phase Three Phase
Volts/Hertz Max. Amps Max. Watts Max. Amps Max. Watts
220/50 or 60 2.75 425 2.75 425
230/60 3.00 450 3.00 450
440/50 or 60 1.38 425
460/60 1.50 450
380/50 or 60 1.67 425
575/60 — —
OCV at rated INPUT: V300-PRO, V300-I 60-75V
MAXIMUM ACCEPTABLE OUTPUT AMPS (AT MINIMUM OUTPUT SETTINGS)
Output
Min. (Max. acceptable), all machines:
CC modes 12A @ 10V. (GTAW, SOFT, CRISP)
CV modes 20A @ 19V. (FCAW, GMAW)
OUTPUT MINIMUM ACCEPTABLE VOLTS (AT MAXIMUM OUTPUT SETTINGS,
WITH FULL LOAD)
Min. Acceptable,
Max. — All Modes V300-I V300-PRO
1 phase @ 200A 380V 220/440V 208V 230/460V 575V
— 38V — 38V 36V
3 phase @ 300A 32V 36V 34V 38V 36V
AUXILIARY TRANSFORMER — 50 Hz or 60 Hz
TEST POINTS RANGE
18 VAC winding to Power Board J7 pins 5 and 6 Welding 17-20 VAC
terminals sw. remote
24 VAC winding to Control Board J2 pin 4 to lead 212 23-26.5 VAC
STANDARD CODES: (Test at Amphenol)
24 VAC without load, measure across pins C and D 22-25 VAC
42 VAC without load, measure across pins I and K 39-44 VAC
115 VAC without load, measure across pins A and J 109-120 VAC