cutmaster 102
SERVICE 5-18 Manual 0-4998
D. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED, & Fault Indicator off,
No arc in torch.
1. Defective Main Pcb
a) On Main PCB 1, LED D59 should be on and
LED D78 should be off. If LEDs are incorrect
Replace Main PCB 1.
2. Defective Logic PCB 3.
a) Measure voltage at Main PCB 1 between test
point GND1 (or GND2) to J2-10.
Voltage is normally 12VDC and should drop to less
than 2VDC two (2) seconds after START signal is acti-
vated. If voltage does not drop replace Logic PCB 3
3. Defective Main PCB 1.
a) Replace Main PCB 1.
E. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED on, Fault Indicator off,
No arc in torch.
1. Defective Main PCB 1.
a) Install jumper on Main PCB 1 between test
point GND1 to terminal TIP1.
b) Apply START signal. If Pilot starts, replace
Main PCB 1.
E. AC LED on, TEMP LED off, GAS LED on,
gas flowing, DC LED on, Fault Indicator off,
Pilot Arc is intermittent.
1. Defective Main contactor W1.
a) Check W1 per Pre Power-UP checks.
2. Defective Logic PCB 3
a) Measure for 12VDC on Main PCB between
test Point GND1 to J2-8. If 12VDC is present,
replace Logic PCB 3.
3 Defective Main PCB 1.
a) Replace Main PCB 1.
F. INTERNAL ERROR. Fault Indicator and 90
PSI Indicators are flashing.
1. There has been a microprocessor problem.
a) Turn ON/OFF SWITCH to OFF position and
then turn to ON position to clear the error.
2. Defective Logic PCB 3.
a) Replace Logic PCB 3.
G. Fans MOT1-3 do not not turn on after a
START signal is activated.
1. Defective Logic PCB 3.
a) Measure voltage at J1-14 to J1-25 on Logic PCB
3 for 12VDC. The voltage should drop to less
than 2vdc after a START signal is active. If the
voltage remains at 12VDC replace the Logic
PCB 3.
NOTE
When the unit is turned on the cooling fans
MOT1-3 will remain off. (In earlier units MOT1
will turn on for .one (1) second and then turns
off) The fans will turn on when a START signal
( Torch Switch, Remote Pendant switch, or CNC
START) is active and will remain on for ten (10)
minutes after the START signal is removed. If an
over temperature condition occurs, the fans will
continue to run while the condition exists and
for a ten (10) minute period after the condition
is cleared.
2. Measure for 12VDC on the Logic PCB 3 between
J7-1 to J7-1 after the START signal is activated. If
voltage is not present replace Main PCB 1.
H. Fan MOT1 does not turn on after START
signal is activated. (MOT2 & MOT3 do turn
on)
1. Defective Main PCB 1
a) Turn SW1 to off position. Turn SW1 back to
ON position and measure for 12VDC between
J7-1 to J7-2 before START signal is activated. If
no voltage is present, Replace Main PCB 1.
2. Defective MOT1
a) Check to be sure there is no physical obstruc-
tions preventing MOT1 fan blades from turn-
ing. Replace MOT1.
I. Either MOT2 or MOT3 do not turn on after
START signal is activated.
1. Fan wires not connected to 40A PCB
a) Check and reconnect to 40A PCB 5.
2. Defective fan.
a) Check to be sure there is no physical obstruc-
tions preventing fan blades from turning.
Replace respective fan.
J. Fans MOT2 & MOT3 do not turn on after
START signal is activated.
1. Defective Capacitor PCB 2
To Next Page
Loading...
