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© MOSA
1.1-09/04
Problem
The motor does not start up,
or starts up and then stops
immediately
No current under no-load
conditions in weld mode
No current under no-load
conditions in auxiliary power
mode
Incorrect minimum voltage
under no-load conditions
Trouble-shooting
Possible cause
1) Engine switch (28) at position
OFF
2) Lack of or insufficient oil in the
motor
3) Faulty motor stopping device (oil-
alert)
4) Lack of fuel in tank or fuel tap
closed
5) Dirty or faulty spark plug
6) Cold motor
7) Other causes
1) Chopper welding bridge broken
2) Faulty circuit
3) Faulty alternator
1) Fuse open
2) Auxiliary power diode bridge
broken
3) Faulty circuit
4) Faulty alternator
1) Incorrect solenoid adjustment
MAGIC WELD
Solution
1) Position switch to ON
2) Refill or top off
3) Replace
4) Refill the tank. Open the fuel tap
5) Clean or check and eventually
replace
6) Hold down the CHOKE button,
after start-up, for a longer period
of time
7) Consult the motor Operating
Manual.
1) Use a multimeter to test that there
are 3 Kohms between pins 1-2; if
NOT replace the bridge
2) Replace
3) Disconnect the welding and
auxiliary power cables. Use a
voltmeter to check that there is
48 Vac at the outputs in weld and
approximately 170 Vac in the 230
V version and 90 Vac in the 110
V version. Carry out the check
when
the
engine
(disconnect one of the two wires
to the solenoid)
1) replace the fuse
10A retarded for version 230V
15A retarded for version 110V
2) Use a multimeter to check the 2
single phase diode bridges on
the auxiliary power
3) Replace
4) Disconnect the welding and
auxiliary power cables. Use a
voltmeter to check that there is
48 Vac at the outputs in weld and
approximately 170 Vac in the 230
V version and 90 Vac in the 110
V version. Carry out the check
when
the
engine
(disconnect one of the two wires
to the solenoid).
1) Adjust the solenoid as shown on
page M34.
M
40.2
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