Thermal Arc 185 AC, Service Manual

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4-6 May 22, 2006
ARCMASTER 185 ACDC 200 ACDC
4.05 Power Source Features
Feature Description
New Digital Control
Almost All welding parameters are adjustable.
Touch Panel Switches
Touch switches eliminate mechanical damage.
Front Control Cover
Protects front panel controls.
Digital Meter
Displays selected weld parameter value. Displays weld current when welding. Displays
weld current for 20 seconds after weld has been completed. A selected weld parameter
value can be adjusted at any time even while welding.
Intelligent Fan Control
The intelligent cooling system is designed to reduce dust and foreign material build-up,
whilst providing optimum cooling. Fan speed reduces approximately 30 seconds after
machine is turned on. Fan speed increases when internal components reach operating
temperature.
ON/OFF switch
Primary voltage Supply ON/OFF switch located on rear panel.
Voltage Reduction Device
(VRD)
Reduces the OCV when the power supply is not in use. Eliminates the need for add on
voltage reducers and has no effect on arc starting. VRD fully complies with IEC 60974-1.
When Stick mode is selected the green VRD light is ON when not welding and red when
welding. When in TIG modes VRD is off.
Control Knob
For the selected weld parameter, rotating the knob clockwise increases the parameter.
Rotating the knob counter-clockwise decreases the parameter. A selected weld
parameter value can be adjusted at any time even while welding. Pushing the knob in
displays actual arc voltage.
Self Diagnosis Using
Error Codes
An error code is displayed on the Digital Meter when a problem occurs with Primary sup-
ply voltage or internal component problems. Refer to troubleshooting guide.
Save/Load function
A total number of 5 programs can be saved into the 185/200ACDC memory. SAVE the
Current Weld Parameters into Memory
? Press the SAVE button. Select a memory location
by rotating the control knob, 1 to 5 is displayed on the meter. After selecting the desired
memory location (ie 1 to 5), press the right scroll button and the machine will give a beep
to confirm the weld parameters from the control panel are saved. LOAD (retrieve) a
Program to Control Panel
? Press the LOAD button. Select a memory location by rotating
the control knob, 1 to 5 is displayed on the meter. After selecting the desired memory
location (ie 1 to 5), press the right scroll button and the machine will give a beep to
confirm the weld parameters are loaded.
Table 4-6: Power Source Features