Specifications

65
SECTION 5 MACHINE TESTING / TROUBLESHOOTING / SERVICE
5.11.2 Fault Light
On the front panel of the PC65
0 is the fault light. This is a visual indication of problems with the unit. The fault light will ash an error
code for the user to translate. The fault codes are as follows:
In the event that the PCB control board has a voltage problem on the board, this turns on the under volt-
age/over voltage fault on the front panel. This shows on the front panel as an evenly ashing light mean-
ing the light is on and o for equal durations, ashing 5 times per second.
The thermal switch fault will generate an error on the fault light of the front panel. This light is described
as mostly on – meaning it is on for 9/10th of a second o for 1/10th.
The Flow switch will generate an error on the fault light of the front panel. This light is described as
mostly o – meaning it is o for 9/10th of a second on for 1/10th.
In the event of a major fault – referred to as a current fault, the fault is shown as a steadily illuminated
fault light on the front panel of the PC650.
5.11.3 Flow Switch (951202)
The Flow switch FS detects the presence of airow in the unit. When there is air owing to the torch in
the unit, the switch closes and allows the unit to operate. Should there be a loss of airow through the
unit, the switch opens and main arc ceases.
The ow switch is connected to the PCB control board on P1-11 and P1-12, and detects any gas ow over
2.5 SCFM. Any ow less than that and the switch will open.
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