Tweco A40-A60 CutMaster - Manual (Page 69)

CUTMASTER A40, A60
Manual 0-5120 SERVICE 5-5
Problem -
Symptom
Possible Cause Recommended Action
FAULT & 80
PSI indicators
flashing. Gas
flow is cycling on
and off.
1. Torch shield cup is loose.
2. Torch tip, electrode or
starter cartridge missing.
3. Torch start cartridge is
stuck.
4. Open conductor in torch
leads.
5. Problem in the torch and
leads switch circuit.
6. Failed components in unit.
1. Tighten shield cup by hand. Do not overtighten.
2. Turn off power supply. Remove shield cup. Install
missing parts.
3. Turn off power supply. Bleed down system
pressure. Remove shield cup, tip and start
cartridge. Check start cartridge lower end fitting for
free movement. Replace if fitting does not move
freely.
4. Replace torch and leads or return to authorized
service center for repair or replacement.
5. Replace torch and leads or return to authorized
service center for repair or replacement.
6. Return to authorized service center for repair or
replacement.
Nothing happens
when torch
switch or remote
switch is closed
(Or CNC START
signal is active)
No gas flow, DC
LED OFF.
1. Problem in the torch and
leads switch circuit
(Remote pendant switch
circuit).
2. CNC Contoller device not
providing Start signal.
3. Failed components in unit.
1. Take Torch and Leads (Remote Pendant) to
Authorize Repair Facility.
2. Contact Controller manufacturer.
3. Return to authorized service center for repair or
replacement.
FAULT and 85
PSI indicators
flashing.
1. Upper O-Ring on torch
head is in wrong position.
2. Torch starter cartridge is
stuck.
3. Worn or faulty torch parts.
4. Shorted Torch.
5. Temporary Short indicated
by 5 links per second.
6. Power Supply Failure
(Standard rate of blinking)
1. Remove shield cup from torch; check upper O-Ring
position; correct if necessary.
2. Turn off power supply. Bleed down system
pressure. Remove shield cup, tip and starter
cartridge. Check starter cartridge lower end fitting
for free movement. Replace if fitting does not move
reely.
3. Inspect torch consumable parts. Replace if
necessary.
4. Replace torch and leads or return to an authorized
Service center for repair.
5. Release torch switch and reactivate.
6. Return to autorized service center for repair or
replacement.
No Fault lights
on, no arc in
torch.
1. Failed components in unit. 1. Return to an authorized service center for repair.
FAULT and 85
PSI indicators
flashing
1. Internal Error 1. Turn the ON / OFF switch OFF then back ON
again. If that does not clear the fault, return to an
authorized service center for repair.
Pilot arc is on but
cutting arc will not
establish
1. Work cable not connected
to work piece.
2. Wrk cable/connector
broken.
3. Failed components in unit.
1. Connect work cable.
2. Replace work cable.
3. Return to an authorized service center for repair.
Torch cutting is
diminished
1. Incorrect current setting.
2. Worn torch consumables.
3. Poor work cable connection
to work piece.
4. Torch being moved too fast.
5. Excessive oil or water in
torch.
6. Failed components in unit.
1. Check and adjust to proper setting.
2. Check torch consumables and replace as needed.
3. Check the connection of the Work Lead to the work
piece.
4. Reduce cutting speed.
5. Refer to "Check air quality" in section 3 Torch.
6. Return to an authorized service center for repair.