FCW DYNA MMA 500S, Operating Manual

Page: 23 / 34

- 21 -
DYNA MMA 500S 、 500GTS 、 500(H)S 、 500(H)GTS 、 630S 、 630GTS Operating Manual
Troubleshooting Guide
Fault Cause Remedy
1. The AC power indicator light is
not lit and welding arc can not
be established.
1. No power input or main power
switches damage.
2. Indicator damage.
1. Check input power or
replace main power switch.
2. Replace indicator light.
2. The AC power indicator light
on and welding arc can not be
established.
1. Input voltage unstable.
2. Diode
damage.
1. Connect stabilizer or reset
power switch.
2. Replace diode.
3. The warning indicator light on. Over load.
Reduce current or wait
moment.
a. No argon flow
no spark.
1. TIG torch switch leads are
disconnected.
2. TIG torch switch damage.
1. Reconnect.
2. Replace TIG torch switch.
b. Argon flow
ontinues no
spark.
c
1. HF starter dirty or spark gaps not
enough.
2. HF starter damage.
1. Clean the starter and
adjust the spark gap
between 0.3~0.8mm.
2. Replace HF starter.
c. No argon flow
have spark.
1. TIG torch damage.
2. Gas hose is cut.
3. Solenoid value damage.
4. Control PCB damage. 1. Replace TIG torch.
2. Replace gas hose.
3. Replace solenoid value.
4. Replace Control PCB.
4. TIG
mode no
high
frequenc
y starts.
d. Argon flow
continues have
spark.
1. TIG cable disconnected.
2. Poor tungsten electrode.
1. Reconnect.
2. Replace.
5. TIG mode unstable Arc.
1. Wrong tungsten electrode.
2. TIG torch bad contact or damage.
3. Argon flow control is improper, not
pure argon gas.
4. TIG torch gas hose is cut.
5. TIG torch wrong position (negative
for TIG torch).
6. Control PCB damage.
1. Choose right tungsten.
2. Replace
TIG torch.
3. Replace argon gas
capacity.
4. Replace TIG torch.
5. Reconnect.
6. Replace control PCB.
6. TIG mode incorrect output.
1. TIG torch/ electrode holder.
2. Wrong
setting.
3. Control PCB damage.
1. Replace.
2. Reset.
3. Replace control PCB.
7.The arc weld has no output
1. The function switch set incorrectly.
2. Three phase commutate bridge
damage.
3. IGBT damage.
4. Drive board damage.
1. Correctly set the function
switch.
2. Replace.
3. Replace.
4. Repair or replace.
8. Arc start difficult or often break
off in arc welding.
1. The weld current setting too low.
2. The power supply voltage is too
low or the cable is too thin.
3. Control Board damage.
1. Increase.
2. Replace.
3. Replace.
4. Repair or replace.
9. Can not display the amperage
or voltage or faulty display.
Display Board damage. Repair or replace.
Table 16