80 - "Opn" On Display (B) Of The Power Source And Display (F) Of The Gas Console. Guard On Power Source Or Hv18 Module Open - Cebora PLASMA PROF 164 HQC Service Manual

CEBORA S.p.A.
The alarm circuit is indicated on the Gas Console by the flashing corresponding display,
while the displays (F) and (M) of the Gas Console read "GAS" "LO" or "err" "79".
Since operation of the 5 gas pressure detection circuits is checked during the "Gas Seal" test,
The test for the pressure detector PT1 is described below. Since the pressure detection circuits
are identical to one another, the same procedure may also be applied to the other pressure
detectors, replacing PT1 with the other detectors (PT2, PT3, PT4, PT5) which are connected to
PRESSURE DETECTOR ON THE GAS CIRCUIT TEST.
The displays (E), (G), (H) and (N) on Gas Console indicate the pressure expressed in tenths of
bar. A bar corresponds to a voltage of 1 Vdc on connectors J1, J2, J3, J4 and J5 (see example in
the table).
Displays (E), (G), (H) and (N)
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With Power Source powered, set up the "Gas seal" test of all pneumatic circuits: press the key
(I) on Gas Console to enter the set-up menu, press the key (A) to select "Test" (led (A3) lit),
turn knob (C) to show "ALL" on display (D).
Press the key (I) to begin the test. The various phases are shown on the displays (D)(F) and
(M) of the Gas Console.
Panel board (20), connector J1, terminals 3(+) and 4(-) = voltage between 0 and the value set
by the regulators (O), (P), (Q), (R) and (T) expressed in Vdc, based on the phase performed
during the "Gas Seal" test.
♦ Check the wiring between connector J1 of panel board (20) and the pressure
detector PT1.
♦ Check on J1 of panel board (20), terminals 1(+) and 4(-) voltage = +18 Vdc
(pressure detection power supply). If incorrect, with Power Source off temporarily
disconnect J1 from panel board (20), restart the Power Source and check the
voltage again on terminals 1(+) and 4(-) of J1, panel board (20) = +18 Vdc. If
incorrect, replace panel board (20).
♦ Make sure the pressure detector PT1 is intact; replace if defective.
♦ Make sure that the gas lines on which the pressure detector PT1 is inserted are not
clogged.
♦ Replace pressure detector PT1 and/or panel board (20).
♦ Replace the panel board (20).
3.4.18 - 80 - "OPn" on display (B) of the Power Source and display (F) of the Gas Console.
Guard on Power Source or HV18 module open.
SAFETY GUARD TEST.
Torch board (42), connector J3, terminals A and B = 0 Vac (correct condition), with guard on
Power Source and on module HV18 closed; 24 Vac (alarm), with guards open.
3.302.218
this test may be used in troubleshooting these alarms.
connectors J2, J3, J4 and J5, respectively.
Pressure
5.4 bar
YES
YES
NOTE
Voltage on connectors J1, J2, J3, J4 and J5
Correct?
NO
Correct?
NO
5.4 Vdc
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9/8/2006