61- Mains Voltage Below Minimum Allowed Value; 3.4.10 -62- Mains Voltage Over Maximum Allowed Value; 74- "Th1" On Display A. Secondary Diodes Group High Temperature; 77- "Th2" On Display A. Pfc Igbt (Boost Converter) High Temperature - Cebora SYNSTAR 200 M Manual De Servicio

load and a circuit that detects when the limiter is continu-
ously tripped, indicating a permanent overload.
This overload is primarily due to mechanical causes, such
as dirt in the gears of the gearmotor, friction from a lack of
lubrication, impediments in feeding the wire coil, bottle-
necks in the torch sheath along the torch cable, etc.
Therefore, clean the wire feed unit and check whether the
problem continues to occur if operating without the wire
feeding.
If so, you may hypothesize that the motor winding or me-
chanical reducer built into the motor have deteriorated and
thus replace the motor (25).
If necessary, perform the "wire feeder motor operation"
tests in par. 3.3.7.
3.4.9

-61- Mains voltage below minimum allowed value.

3.4.10 -62- Mains voltage over maximum allowed value.

The PFC board on power board (45) checks the mains
voltage status through the "VACIN" signal generated by
the power board (45) and commands the power source
stop if this exceeds the allowed limits.
The "VACIN" signal can be tested on J5, terminals 1(+)(or
R17, J5 pin 1 side) and 24(-), on power board (45).
Corrected value with mains nominal voltage (230 Vac) =
+1,5 Vdc, approximately.
The limits are fixed to:
− +1,0 Vdc, approx., corresponding to mains voltage =
155 Vac, approx. (Err 61);
− +1,8 Vdc, approx., corresponding to mains voltage =
275 Vac, approx. (Err 62).
Check correct fixing and connections cleaning of the PFC
board on power board (45), J5 connector.
Make sure conditions of the mains voltage relief circuit
components (D9, D10, R17, R22, R27, R29) on power
board (45).
3.4.11 -74- "th1" on display A. Secondary diodes
group high temperature.
3.4.12 -77- "th2" on display A. PFC igbt (boost con-
verter) high temperature.
With these alarms we recommend that you not shut off the
power source, to keep the fan running and thus cool the
unit more rapidly.
Normal operation is restored automatically as soon as the
temperature returns within the allowed limits.
− Make sure that the fan (44) is working properly;
− check for proper air flow and make sure there is no dust
or obstacles to cooling in the aeration tunnel;
− make sure that the operating conditions meet the
specification values, especially observe the "duty
cycle";
− make sure that the thermostat is properly mounted on
the secondary diode group dissipater, on power board
3302316/A
(45). Its signal can be tested on terminals TP21(+) and
TP14(-) (close to J7) on power board (45). Correct value
for ambient temperature = 0 Vdc, contact closed; (+5
Vdc = contact open, alarm TH1);
− make sure that the thermostat is properly mounted on
the boost converter igbt (U5, U7) dissipater, on power
board (45). Its signal can be tested on terminals TP23(+)
and TP22(-) (close to L3) on power board (45). Correct
value for ambient temperature = 0 Vdc, contact closed;
(+5 Vdc = contact open, alarm TH2).
3.4.13 -80- "Door opened" on display A. Wire feed
unit guard open.
This alarm indicates that the safety cover of the wire feed
unit is open.
− Check the wiring between J7 panel board (48) and
switch (54) on wire feed unit guard;
− check the voltage on J7 of panel board (48), terminals
1(+) – 2(-) = 0 Vdc = guard closed, correct condition;
+9 Vdc approximately = guard open, alarm (see con-
nector map, par. 5.5);
− make sure that the switch (54) and the unit guard are
properly mounted. If incorrectly positioned, correct the
position; replace if defective.
3.4.14 -99- "POWER OFF" on display A. Incorrect
mains voltage (machine shutdown).
This alarm indicates that the mains voltage, during the
operation, is go down under 50% approx., of the nominal
value.
This indication is normally present, for short time, every
time that power source is switched off.
In case of mains voltage lack, as an example after the
switch (40) opening, all control circuits remain powered
for few seconds due to the charge effects of the capacitors
in the various boards power supplies.
The power board (45) detects the mains voltage lack, noti-
fies it to the PFC board ("VACIN" signal), which stops the
power source with "POWER OFF" indication on display A.
The "VACIN" signal can be tested on J5, terminals 1(+)(or
R17, J5 pin 1 side) and 24(-), on power board (45).
Corrected value with mains nominal voltage (230 Vac) =
+1,5 Vdc, approximately.
The limit is fixed to +0,5 Vdc, approx., corresponding to
mains voltage = 80 Vac, approx.
Check correct fixing and connections cleaning of the PFC
board on power board (45), J5 connector.
Make sure conditions of the mains voltage relief circuit
components (D9, D10, R17, R22, R27, R29) on the power
board (45).
EN
29