SECTION 5
TROUBLESHOOTING
25
5.3REFERENCE VOLTAGE CHECKS
A. Control Board Assembly (PCB1)
1.
LEDs
LED-1
-
Torch Switch
LED-2
-
High Frequency
LED-3
-
Gas Solenoid Valve
2.
Voltage Test Points
Tests are made with power on - no arc.
Disable High Frequency by disconnecting blue wire with black sleeve
TP-0
-
Ground
TP-1
-
+15 vdc
TP-2
-
+12 vdc
TP-3
-
-12 vdc
TP-4
-
+5 vdc
TP-9
-
IGBTs driving signal - switching frequency = 20 KHz
TP-10 -
IGBTs driving signal - switching frequency = 20 KHz
0
-13 vdc
13 vdc
40 usec - LPG50
50 usec - LPG80
6 usec - LPG50
9 usec - LPG80
For 208/230 VAC input, the IGBT off time is 3
µ
sec.
For 400/460/575 VAC input, the IGBT off time is 6
µ
sec.
Figure 5.1 IGBT Gating Signal
50
µ
sec
Summary of Contents for PCM-875
Page 29: ...28 D 36587 Figure 5 1 Schematic Diagram PCM 875 208 230 V 50 60 Hz 1 or 3 Phase ...
Page 30: ...29 D 36595 Figure 5 2 Wiring Diagram Sheet 1 of 2 PCM 875 208 230 V 50 60 Hz 1 or 3 Phase ...
Page 31: ...30 Figure 5 3 Wiring Diagram Sheet 2 of 2 PCM 875 208 230 V 50 60 Hz 1 or 3 Phase D 36595 ...
Page 32: ...31 D 36597 B Figure 5 4 Schematic Diagram PCM 875 400 460 V 50 60 Hz 3 Phase 1 2 3 4 5 6 ...
Page 33: ...32 D 36598 Figure 5 5 Wiring Diagram Sheet 1 of 2 PCM 875 400 460 V 50 60 Hz 3 Phase ...
Page 34: ...33 D 36598 Figure 5 6 Wiring Diagram Sheet 2 of 2 PCM 875 400 460 V 50 60 Hz 3 Phase ...
Page 35: ...34 D 36715 A Figure 5 7 Schematic Diagram PCM 875 575 V 60 Hz 3 Phase ...
Page 36: ...35 D 36716 Figure 5 8 Wiring Diagram Sheet 1 of 2 PCM 875 575 V 60 Hz 3 Phase ...
Page 37: ...36 D 36716 Figure 5 9 Wiring Diagram Sheet 2 of 2 PCM 875 575 V 60 Hz 3 Phase ...
Page 47: ...46 ...