Fronius TransPocket 1500 Service Manual page 36

Error
Troubleshooting
table
(continued)
Not possible to set
welding current on
(otherwise fully functional)
AL 1500 torch or TR 1500
remote control unit
TP 1500 TIG: No gas-flow
when "TIG welding" or
"TIG pulsed-arc welding"
modes are selected
N.B.! Activate the "Gas test"
function as follows:
- Shift the mains switch into
- Press the "Process" button
It is not possible to set the
welding amperage
correctly using the setting
dial
The actual welding
amperage very obviously
does not correspond to the
pre-set welding amperage
Arc sometimes breaks
during the welding
process
Rod electrode tends to
stick
(in rod-electrode welding)
the "O" position
at the same time as you
shift the mains switch to
the "I" position
Cause
LCA 15 board is faulty
Remote-control unit socket is
faulty (TP 1500 RC and TP
1500 TIG)
Sieve on gas solenoid valve is
dislocated - even when the
"Gas test" function is activated,
there is still 15 V on the (white)
"Gas value" cables to the gas
solenoid valve
Gas solenoid valve is faulty -
even when the "Gas test"
function is activated, there is
still 15 V on the (white) "Gas
value" cables to the gas
solenoid valve
LCA 15 board is faulty - even
when the "Gas test" function is
activated, only 0 V (instead of
15 V) is measured on the "Gas
value" cables to the g.s.v.
Cables and plug-on connec-
tions on LCA 15 or FPA 15
board are loose or faulty
Shunt cables are loose or
faulty
Maximum welding amperage
is incorrectly set
Potentiometer is faulty
If the TIG welding process is
selected, the TIG comfort-stop
parameter is set to too low a
value
Arc-drop voltage of electrode
too high (e.g. grooved elec-
trode)
Mains undervoltage
Wrong process has been
selected for the present
welding operation
The parameters "Arc force" (in
rod-electrode welding) or
"Characteristic" (in
electrode welding using CEL-
electrodes) are set
excessively low values
36
Remedy
Replace the LCA 15 board (see
"Installation instructions for
LCA 15 board")
Replace the remote-control unit
socket on the FPA 15 board
(see installation instructions
"Replacing the remote-control
unit socket")
Take the pressure regulator out
of the gas connection. Aim a
jet of dry, reduced-blow com-
pressed air into the welding
socket (-) for several seconds
Replace the gas solenoid valve
(see the section headed "In-
stallation instructions for gas
solenoid valve")
Replace LCA 15 board (see
the section headed "Installa-
tion instructions for LCA 15
board")
Check the cables and plug-on
connections on the FPA 15 and
LCA 15 board
Check the shunt cables
Check and set max. welding
amperage (see "Checking and
setting the maximum welding
amperage")
Replace the FPA 15 (see
"Installation instructions for
welding-current dial")
In the set-up menu, set the TIG
comfort-stop parameter to a
higher value
If possible, use different type
of electrode or a machine
capable of delivering greater
welding current
Measure mains voltage at
mains connection, use a supply
cable with a bigger cross-
sectional area
Select a process that is suit-
able for the welding operation
being performed
In the Set-up menu, set the
"Arc force" or "Characteristic"
rod- parameter to a higher value
to