53 - "Trg" On Display (B) Of The Power Source And (F) Of The Gas Console. Start Button Pressed While Resetting The Operating Mode; 55 - Electrode Finished - Cebora PLASMA PROF 164 HQC Service Manual

CEBORA S.p.A.
3.4.11 - 53 - "trG" on display (B) of the Power Source and (F) of the Gas Console. Start
button pressed while resetting the operating mode.
Some alarms, such as "low gas pressure" or "high temperature," stop the Power Source when
the corresponding indicator is lit, but are not saved and are automatically reset when the
conditions return to within the allowed limits. On automated systems, the system may be reset
when the start command has not yet been removed, since before the stop occurred. To prevent
the Power Source from starting suddenly due to such a random reset, this situation is detected
and causes a saved block of the Power Source, indicating error "trG".
To restore proper operation, shut off the Power Source, remove the start command and restart
the Power Source.

3.4.12 - 55 - Electrode finished.

This function is controlled only during cutting (transfer arc).
This alarm indicates that the electrode is not in condition to ensure correct operation of the
Power Source, and thus it may be difficult to achieve good quality cutting. To solve this
problem, we recommend performing the following checks.
NOZZLE VOLTAGE PRESENCE TEST.
Torch board (42), terminal J6(+) and connector J8, terminal 1(-), voltage = from +150 to +190
Vdc (with pilot arc lit), for a duration of 1 second (maximum pilot arc time), after pressing
the start command.
♦ Check the wiring between J13 torch board (42) and J14 control board (38).
♦ With Power Source off, temporarily disconnect J14 from control board (38) and
check the resistance on terminals 4 and 5 of J14 on pilot arc board (38). Correct
value = junctions of two diodes in one direction and 4.7 Kohm with the
instrument probes reversed. If incorrect, replace control board (38).
♦ Replace the control (38) and/or torch (42) boards.
♦ Check the wiring between connector J6 and J8 of torch board (42), resistor (17), terminal
(53)(-) of the Power Source.
♦ Make sure output voltage is being generated, performing if necessary the tests in par. 3.3.6..
♦ With Power Source off, temporarily disconnect J6 and J8 from torch board (42) and check the
resistance on terminals J6 and 1 of J8 on torch board (42). Correct value = approximately 40
Kohm. If different, replace the torch board (42).
♦ Check the torch board (42) supply voltage, performing if necessary the TORCH BOARD (42)
POWER SUPPLY TEST in par. 3.4.6.
♦ Check electrode and torch nozzle; replace if worn or damaged.
♦ Make sure the internal parts of the torch are properly insulated, including cables; if in doubt,
replace the entire torch.
♦ Replace the torch (42) and/or control (38) boards.
3.302.218
NOTE
Correct?
NO
YES
38
9/8/2006