Initial Trouble Diagnosis - Panasonic YD-500KR Operating Instructions Manual

INITIAL TROUBLE DIAGNOSIS

Even if you have a trouble such as being unable to weld, unstable arc, bad welding result,
do not jump to the hasty conclusion that the welding machine is out of order. Even if the welding
machine has nothing wrong, the above-mentioned errors may occur because or something far from
a trouble, for example, blown or loosened fuse, unset or erroneously set switches, almost
disconnected cable, cracked gas hose.
Therefore, when you suspect the equipment of having a trouble, it is recommended for you to
check it prior to asking for a repair. It would solve not a few problems.
The following is an initial diagnosis list designed for general welding errors.
Find a relevant phenomenon among the error items in the upper right of the list, and
examine/check all the items marked with ○ in the blanks below that phenomenon.
For the fuses, the operation panel has a power fuse. and the printed circuit board has a motor
fuse and gas valve fuse, respectively.
Block and check item
Switch box
(input protective
device)
Input cable
Switches on the welding
power source operation
panel
Welding power source
Internal fuses
Gas Bomb and gas
Regulator
Gas hose (entire route from
the gas bomb to the welding
torch )
[Welding Error Initial Diagnoses List]
 Turning on the switch securely
 Blown fuse
 Loose connection
 Cable being almost cut
 Loose connection
 Trace of overheat
 Turning on the POWER switch
 Erroneous settings of "Wire
DIA. " "CRATER"
SUPPLY" selector switches
 Blown "power", "motor", and
"gas valve" fuses
 Opening the main plug
 Remaining amount of gas
 Flow
rate(pressure)
value
 loose connection
 Loose connection
 Damage or burnt hole in the gas
hose
34
Error
○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○
○ ○ ○ ○ ○ ○ ○
and "gas
○ ○ ○
set ○
○
○
○
○ ○
○