Power Led (Green); Alarm Led (Yellow); Display; Description Of Diagnostic Indications - Selco Genesis 200 AC-DC Repair Manual

The front panel controls the status of the actual equipment, which is reported to the operator via the LEDs and display.
See the owner's manual for meanings and use of the various controls as this section deals with diagnostic signals only.

Power LED (GREEN)

Indicates machine on/off status. Always lit if the panel, and hence the machine, is powered correctly.

Alarm LED (YELLOW)

Indicates the equipment is in alarm status. Never lit unless there is a problem.
The display indicates the type of alarm in question.

Display

When the power source is switched on, the panel runs a "self-test" during which all LEDs light and the display reads "200".
Immediately afterwards, the display indicates the control panel's software version (e.g. 1.0) for a moment.
The display indicates the welding parameters requested by the operator (with the aid of other keys) and as soon as the arc is
struck, it gives a readout, furnishing the real value of the current delivered.
When the yellow LED lights, flashing codes appear on the display to indicate an alarm status (in this status, only the two powe r
and alarm LEDs are lit):
Message Error type
E10 Built-in heat sink temperature high
E11 Supply voltage too high
E12 Supply voltage too low
E20 Front panel memory error
E24
E25
Once the causes of an alarm have been removed, pressing any key (or switching the machine off and back on) will
usually exit alarm status.
The thermal cutout alarm stops automatically, allowing the power source's internal temperature to drop (it is best to
keep the power source switched on as ventilation will aid cooling). The machine will run a new self-test and then resu-
me operation as normal.

Description of diagnostic indications

Action
Remove top cover, check internal temperature, check fan, check status of ther-
mal cutout devices (NC) (see figures 11-12-13)
Remove top cover, check supply voltage is within the prescribed range.
Check voltage on 15.14.252 V
Remove top cover, check supply voltage is within the prescribed range.
Check voltage on 15.14.252 V
Remove top cover, check front panel power supply. Try resetting* front panel
and, where necessary, replace.
* NB: to reset the front panel (memory), see procedure in section 8 further on.
276Vac (see sect. 9.1)
RV1 RV2
184Vac (see sect. 9.1)
RV1 RV2
13