- 21 -
BOSS TIG 160HF
、
200HF 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. Primary fuse is blown.
3. Indicator damage.
4. Relay PCB damage (for TIG
200HF).
5. Indicator light is open circuit.
1. Check input power or replace
main power switch.
2. Replace primary fuse.
3. Replace indicator light.
4. Replace relay PCB.
5. Replace indicator light.
2. The AC power indicator light on
and welding arc can not be
established.
1. Input voltage unstable.
2. Diode PCB damage.
1. Connect stabilizer or reset power
switch.
2. Replace diode PCB.
3. The warning indicator light on.
1. Over load.
2. MOSFET damage.
1. Reduce current or wait moment.
2. Replace MOSFET.
a. No gas flow no
spark.
1. TIG torch switch leads are
disconnected.
2. TIG torch switch damage.
1. Reconnect.
2. Replace TIG torch switch.
b. Gas flow
continues no
spark.
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 gas flow
have spark.
1. TIG torch damage.
2. Gas hose is cot.
3. Solenoid value damage.
4. Power PCB damage.
5. Gas regulator turned off.
1. Replace TIG torch.
2. Replace gas hose.
3. Replace solenoid value.
4. Replace power PCB.
5. Turn on.
4. TIG mode
no high
frequency
starts.
d. Gas flow
continues have
spark.
1. Welding cable disconnected.
2. Poor tungsten.
1. Reconnect.
2. Replace tungsten.
5. TIG mode unstable welding Arc.
1. Wrong tungsten.
2. TIG torch bad contact or damage.
3. Gas 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 and MMA mode incorrect
output.
1. TIG torch/ electrode holder.
2. Wrong setting.
3. Control PCB damage.
4. Potentiometer damage or
disconnected.
1. Replace.
2. Reset.
3. Replace control PCB.
4. Replace or reconnect.
7. MMA (STICK) mode no circuit
output.
1. Function switch select to the TIG
mode position.
2. Relay PCB damage.
3. MOSFET damage.
1. Select to MMA mode.
2. Replace relay PCB.
3. Replace MOSFET.
8. MMA (STICK) mode unstable
welding arc.
1. Power PCB damage.
2. Diode PCB damage.
3. Control PCB damage.
1. Replace power PCB.
2. Replace diode PCB.
3. Replace control PCB.
9. Fan does not run.
1. Power PCB damage.
2. Fan motor damage.
3. Relay PCB damage.
1. Replace power PCB.
2. Replace fan motor.
3. Replace relay PCB.
Table 16
