No.P10224
P. 32 / 47
11. APPLIED FUNCTION (continued)
①
Operation of safety circuit error
When turning on the power switch while the welding staring signal is sent to avoid accidental
work of the welding power source, the safety circuit functions, the welding power source keeps
stopping, and the WARNING lamp flashes. In this case, the machine can operate when the torch
switch is turned off and safety circuit is canceled.
②
Setting error of welding conditions
The WARNING lamp lights and the welding power source automatically stops when the
PROGRAM switch is set to unavailable numbers. When setting the PROGRAM switch to
numbers other than numbers listed in “5.1.1 Front panel Program switch”, reset the switch on the
front panel to the proper numbers.
③
Operation stop (compulsory stop from a robot) error
When releasing the external terminal board between operation stop terminals (line gauge: 165)
on P.C.B.P10153Q, the WARNING lamp lights and the welding power source stops. In this case,
short-circuit between the terminals after solving a cause of the operation stop. After the power
switch is turned on, the lamp may keep lighting for approximately 10 sec. until the robot control
device becomes stable, it goes out in a short period of time.
④
Operation error of input overvoltage circuit
If the input voltage exceeds 529V, the WARNING lamp will light and the welding power source
will stop automatically. In this case, turn off the POWER switch and measure the input voltage
with a tester, etc. to make sure excessively high voltage is not output. To cancel the error,
connect the POWER switch again after solving the error.
⑤
Output overcurrent error
When an overcurrent continues for more than one second during welding, the WARNING lamp
lights and the welding power source stops automatically. In this case, turn off the CONTROL
POWER switch and make sure the welding current does not exceed the rated output value, or
there are no short-circuits at the output side such as contacts between the tip and the base metal,
or short-circuits in the output cables. In this case, turn on the POWER switch again to solve the
error.
⑥
Thermal overload
The rated duty cycle of this welding power source is 80% (refer to DUTY CYCLE in this manual
for details). When the duty cycle exceeds rated duty cycle, or ambient temperature exceeds
104F° (40C°), the WARNING lamp lights and the welding power source stops automatically. In
this case, wait for more than ten minutes with the POWER switch set to ON and the fan rotated.
When starting the welding operation again, turn on or off the POWER switch after lowering the
duty cycle or the welding current. Be sure to rest the welding power source for more than ten
minutes, when turning on the POWER switch again. Failure to do so may result in damaging the
welding machine.
⑦
SCR and IGBT driver error
When any error is detected in SCR and IGBT driver, the WARNING indicator will light and the
welding power source automatically. The error will be canceled by turning the control power
switch off, then turning on again, or resetting the system by receiving control signals.
