Hypertherm Powermax1000 Rev.1 - Handbuch (Seite 23)

powermax1000
Wartungshandbuch 3-1
Abschnitt 3
WARTUNG
Inhalt:
Regler und Anzeigeleuchten .....................................................................................................................................3-3
Anzeige-LEDs ..................................................................................................................................................3-3
Theorie des Betriebs.................................................................................................................................................3-4
Allgemeines......................................................................................................................................................3-4
Funktionsbeschreibung ....................................................................................................................................3-4
Betriebsablauf ..................................................................................................................................................3-5
Vorbereitung für die Fehlerbeseitigung .....................................................................................................................3-6
Testausrüstung.................................................................................................................................................3-6
Verfahren und Ablauf bei der Fehlerbeseitigung ..............................................................................................3-6
Untersuchung – außen.....................................................................................................................................3-6
Untersuchung – innen ......................................................................................................................................3-7
Anfangswiderstandsprüfung .....................................................................................................................................3-7
Netzschalter überprüfen...................................................................................................................................3-8
Hypertherm-IGBT-Tester ..................................................................................................................................3-9
Anzeige-LEDs und Gerätetests........................................................................................................................3-9
IGBT-Testvorbereitung ...................................................................................................................................3-10
IGBT-Gerätetest unter Verwendung des Hypertherm-Testers .......................................................................3-10
Fehlerbeseitigung am Hypertherm-IGBT-Tester.............................................................................................3-11
Schematische Darstellung für den Bau eines IGBT-Testers ..........................................................................3-11
IGBT-Gerätetest mit Nicht-Hypertherm-Testern .............................................................................................3-12
Richtschnur zur Fehlerbeseitigung .........................................................................................................................3-14
Steuerbaukarten-LEDs...................................................................................................................................3-18
Test 1 – Netzspannung ..................................................................................................................................3-19
Test 2 – Spannungsausgleich ........................................................................................................................3-20
Test 3 – Ausgangsdioden ...............................................................................................................................3-21
Test 4 – Pilotlichtbogen-IGBT (Q8) ................................................................................................................3-22
Test 5 – Inverter-IGBT (Q6) und PFC-IGBT (Q7)...........................................................................................3-23
Test 6 – Rücklauf-Schaltkreis.........................................................................................................................3-24
Test 7 – Brenner klemmt in offenem Zustand ................................................................................................3-25
Test 8 – Plasmastart.......................................................................................................................................3-26
Test 9 – Brennerkappensensor ......................................................................................................................3-26
Test 10 – Gasmagnetventil.............................................................................................................................3-27
Test 11 – Eingangsnetzspannung (VACR) .....................................................................................................3-27
Test 12 – Druckschalter..................................................................................................................................3-27
Test 13 – Lüfter ..............................................................................................................................................3-27
Test 14 – AUX-Schalter (Hilfsschalter) ...........................................................................................................3-28
Test 15 – Rückkopplungs-Schaltkreisversagen .............................................................................................3-28