Lincoln Electric IDEALARC CV-400-I - Manual (Page 18)

B-7 OPERATION B-7
STARTING THE MACHINE
The power switch at the extreme right side of the con-
trol panel energizes the CV-400-I.
ADJUSTING THE OUTPUT VOLTAGE
USING THE DIGITAL METER
The digital meters in the CV-400-I incorporate a voltage pre-
set function. This allows the operator to set the desired
welding voltage before striking an arc. The digital meters
can also display welding current.
To make use of the voltage preset function, the Volts/Amps
switch must be in the "Volts" position. Turn the Voltage
Adjust knob until the digital meter displays the desired weld-
ing voltage. (See below if an external power source remote
control is installed.)
When an arc is struck, the digital meter displays the actual
welding voltage, as measured at the CV-400-I output termi-
nals.
NOTE: The arc voltage at the electrode may be as much as
two volts different from the CV-400-I output terminal
voltage. This is due to voltage drops present in the
welding cables, cable connections, and welding
gun. To minimize these drops, use cables of ade-
quate capacity, and make sure all connections are
clean and tight. Because of these voltage drops,
you may have to preset the CV-400-I for a slightly
higher welding voltage than your procedure calls for.
To read welding current, set the Volts/Amps switch to the
"Amps" position. The welding current will be displayed
whenever an arc is struck.
LOCAL/REMOTE SWITCH OPERATION
If voltage control is desired at the CV-400-I, the
Local/Remote switch must be in the "Local" position. The
Voltage Adjust on the front panel can be used to adjust the
CV-400-I output. (The remote control, even if connected,
will have no effect if the switch is in the "Local" position).
To use a remote control, such as the K857 (see INSTALLA-
TION section), place the Local/Remote switch (see Figure
B.1) in the "Remote" position. The remote control now con-
trols the output voltage, in the manner described above.
This control may be adjusted while welding to change the
CV-400-I output.
AUXILIARY POWER
42 volt AC auxiliary power, as required for some wire
feeders, is available through the wire feeder recepta-
cle. A 10 amp circuit breaker protects the 42 volt cir-
cuit from overloads.
CV-400-I Export machines only can also supply 115
volt AC auxiliary power through the wire feeder recep-
tacle. A 5 amp circuit breaker protects the 115 volt
circuit from overloads.
The CV-400-I can supply 220 volt AC power at 2
amps for powering water coolers or other equipment.
This auxiliary power is available from the Continental
European type receptacle mounted on the case back.
A 2 amp circuit breaker, located next to the recepta-
cle, protects this auxiliary from overloads.
NOTE: Do not use circuits 2 or 4 for control of auxil-
iary loads. (The 2-4 circuit is isolated from the
31-32 and 41-42 circuits.)
Note that some types of equipment, especially pumps
and large motors, have starting currents which are
significantly higher than their running current. These
higher starting currents may cause the circuit breaker
to open. If this situation occurs, the user should refrain
from using the CV-400-I auxiliary power for that equip-
ment.
___________________________________________
OVERLOAD PROTECTION
This welder has thermostatic protection from exces-
sive duty cycles, overloads, loss of cooling, and high
ambient temperatures. When the welder is subjected
to an overload or loss of cooling, a thermostat will
open. This condition will be indicated by the illumina-
tion of the yellow Thermostatic Protection Light on the
case front (see Figure B.1).The fan will continue to run
to cool the power source. No welding is possible until
the machine is allowed to cool and the Thermostatic
Protection Light goes out.
CV-400-I
CAUTION