Lincoln Electric SVM161-A service manual Troubleshooting and Repair External Diagnostics, Display

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F-9 TROUBLESHOOTING AND REPAIR F-9

EXTERNAL DIAGNOSTICS

Figure F.1 External Diagnostics

	WARNING
		STICK	4-STEP	LOCAL		Display
		DC TIG	2-STEP	REMOTE
	MODE	AC TIG	TRIGGER
		WELD	PULSE FREQUENCY
		CURRENT	Hz
	UPSLOPE		% ON TIME	DOWNSLOPE		Output Current Control
	sec			sec
					A
				POSTFLOW	OUTPUT	Output
				sec
			BACKGROUND			Set-up Parameter
			CURRENT
				FINISH
				CURRENT	PARAMETER	Select Button
Power Supply					SELECT / HOLD
	V		PULSE ON		AC FREQUENCY Hz
					AC BALANCE % EN
Alarm		®

The front panel controls the status of the equipment and shows it to the operator via the LED’s and the display. Immediately after switch-on of the equipment, the front panel executes an autotest operation, all LED’s will light up and the display shows”200” as a check.

Power supply LED (GREEN)

Indicates the machine switch-on status. Always present if the panel, and therefor the machine, is correctly powered.

Alarm LED (YELLOW)

Indicates a protection status of the equipment. Comes on to indicate the presence of a problem. The type of alarm is indi- cated in the display by an error code (see below).

Display

Immediately after the autotest operations above, the display briefly shows the software version of control panel (e.g. 01).

It indicates the welding parameters requested by the operator (with the help of the other keys) and immediately after striking of the arc sets to reading mode, providing the real value of the current delivered by generator. It indicates a protection status via codes with simultaneous switch-on of the yellow LED.

Indic.	Type of Error	Action
E10	Internal Heatsink Overtemp.	Remove upper cover, check internal temperature, check thermal device status
		(N.C.). See machine layout.
E11	Power Supply Overvoltage	Remove upper cover, check that the power supply voltage is within the established
		range (+/- 15%). Check reading voltage on 15.14.314 CN1 (See Fig. 9)
E12	Power Supply Undervoltage	Remove upper cover, check that the power supply voltage is within the established
		range (+/- 15%). Check reading voltage on 15.14.315 CN1 (See Fig. 9)
E13	Front Panel Memory Error	Remove upper cover, check front panel power supplies. Perform front panel reset*
		test and replace if necessary.
E14	Front Panel Secondary	Remove upper cover, check front panel power supplies. Perform front panel reset*
	Memory Error	test and replace if necessary.

*Note: to reset front panel (memory) see procedure in “Set-up parameters” chapter below.

Normally, when cause(s) of alarm(s) is (are) removed, press one of the keys to exit from alarm status (or switch off and on the machine).

Thermal alarm will be automatically reset by letting go down internal temperature: machine will execute a new autotest and then start as in normal operation.

In case of error code E10, see also the three thermal switches in fig. below.

In case of error codes E11/E12, check input power supply voltage, with reference to the following table.

Under/Overvoltage alarm thresholds

Power supply rated	Undervoltage	Overvoltage
voltage
115 VAC	92 VAC	138 VAC
230 VAC	184 VAC	276 VAC

INVERTEC® V205-T AC/DC™