No. P10224
P. 37 / 47
12. MAINTENANCE AND TROUBLESHOOTING (continued)
2.3Welding troubleshooting
No. Trouble
Cause
Solution
1
POWER switch
tripped.
Do not connect POWER switch again. Contact your dealer.
Fan rotates when
POWER switch
connected.
Trouble of PL1.
Check PL1.
2
Main power lamp
PL1 will not light.
Fan will not rotate
when POWER switch
connected.
Line disconnect switch of power
box not connected.
Check power box.
PL1 will not light.
Refer to No.2.
Breaking of F1
Replace it after checking causes.
3
Fan will not rotate
when POWER
switch connected.
PL1 lights.
Trouble of fan.
Checking fan.
Trouble of thermostat TH1 and
TH2.
Check thermostat TH1 or TH2.
Overheated heat sink.
Cool fins after checking causes.
Input overloaded voltage or
shortage of input voltage.
Check input voltage.
Incomplete insertion of CN11 or
CN14 on P.C.B.P10153Q.
Completely insert CN11 or CN14.
4
WARNING lamp PL2 lights when main
power switch is turned on.
Wiring of external connection
terminal board on P.C.B.P10153Q.
Wire to “OPERATION STOP”.
Outlet valve of gas cylinder
closed.
Open valve.
Lack of gas pressure of gas
cylinder.
Check gas pressure.
Trouble of +24V power source
circuit.
Replace P.C.B. P10153Q.
Gas will not be
generated when GAS
switch S4 is set to
CHECK.
Trouble of gas electromagnetic
valve SOL.
Check and replace gas
electromagnetic valve SOL.
Trouble of gas control circuit.
Check and replace
P.C.B.P10153Q.
Gas generated when S4
set to CHECK.
Trouble of interface circuit.
Check and replace
P.C.B.L8268M.
5
Shield gas will not
be generated when
torch switch is
turned on.
WARNING lamp
lights.
Refer to No.4.
S4 set to CHECK.
Set S4 to WELD.
Gas valve switch terminal on
terminal block of P.C.B.P10153Q
short-circuited.
Open gas valve switch terminal.
Trouble of gas control circuit.
Check and replace P.C.B.
P10153Q.
Trouble of gas electromagnetic
valve SOL.
Check gas electromagnetic valve
SOL.
6
Shield gas will not stop.
Trouble of interface circuit.
Check and replace
P.C.B.L8268M.
