61 - Mains Voltage Lower Than Minimum Limit; 62 - Mains Voltage Higher Than Maximum Limit; 73 - "Th" On Display (M), "0" On Display (N) = Output Diode Temperature Excessive; 99 - "Off" On Display (M). Incorrect Mains Voltage (Machine Shut Off) - Cebora TRI STAR MIG 1635/M Service Manual

CEBORA S.p.A.

3.4.9 - 61 - Mains voltage lower than minimum limit.

3.4.10 - 62 - Mains voltage higher than maximum limit.

The control board (29) verifies the mains voltage by means the +24 Vdc supply voltage
check.
If the mains voltage results suitable, the power source gets ready for the operation; if instead it
is judged too low, the control commands the block for error 61, if too high commands the block
for error 62.
Check the wiring between J4 of power board (32) and J7 of control board (29) and, if
necessary, carry out the tests of par. 3.3.1, or replace power (32) and/or control (29) boards.

3.4.11 - 73 - "tH" on display (M), "0" on display (N) = output diode temperature excessive.

With this alarm we recommend do not shut off the power source, to keep the fans running and
thus allow rapid cooling. Normal operation is restored automatically as soon as the temperature
returns within the allowed limits.
If the alarm occurs repeatedly, we recommend that you:
− Make sure that air flows smoothly, and there is no dust or other impediments to cooling in the
aeration tunnels.
− Check the fans (27) supply voltage, on J2 and J3 of power board (32), terminals 1(+) and 2(-)
= +25 Vdc. If not correct, replace power board (32). If correct, verify fans (27) correct
operation and if defective replace them.
− Make sure that the working conditions comply with the specified values, especially observing
the "duty cycle".
− Make sure the diode holding screws on the dissipater on the power board (32), are firmly
tightened.
− Make sure correct assembly and operation of the temperature sensor, mounted on the output
diode dissipater on power board (32); with ambient temperature, on the inductors L3(+) and
L2(-), on control board (29), must be measured a voltage of approximately +3 Vdc. If correct,
replace control board (29). If not correct, check the wiring between terminals 6 and 7 of J1
power board (32) and terminals 6 and 7 of J1 control board (29) (temperature control line)
and, if necessary, replace the temperature sensor on power board (32) or the power board (32)
complete.
− Replace the control (29) and/or power (32) boards.

3.4.12 - 99 - "OFF" on display (M). Incorrect mains voltage (machine shut off).

This signal normally appears whenever the power source is shut off.
When mains voltage is missing, for example after opening the switch (9), the control circuit
remains powered for a few seconds due to the effects of the DC-capacitor discharge on the
supply circuits and finding a supply voltage fast lowering, it commands the power source stop,
with "OFF" signaling.
This alarm is similar to error 61, which, being filtered, results more efficient on supply
voltage slow lowering.
If this signal is present with switch (9) closed and mains voltage present, carry out the
MAINS CONNECTION TEST and CONTROL BOARD (29) POWER SUPPLY TEST of par.
3.3.1.
3.302.233
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22/09/2008