Victor CUTMASTER 102, Service Manual

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CUTMASTER 102
Manual 0-4998 SERVICE
5-11
D. All front panel indicators are OFF, Fan MOT 1
never turns ON. Main Contactor W1 does not
close.
1. Primary power not connected.
a) Check that cable is connected to primary power.
2. Primary line fuse/breaker is blown/tripped.
a) Replace fuse or reset breaker.
3. Defective ON/OFF SWITCH
a) Check continuity
4. Defective Main PCB 1
a) Measure Main PCB power supply voltages at the
following test points
GND1 to +12V = 12VDC
GND1 to +48V = 48 VDC
Replace Main PCB 1 if not correct
5. Defective Ribbon Cable
a) Check continuity
6. Defective Logic PCB 3
a) Replace Logic PCB 3
E. AC LED ON, W1 contactor does not energize.
(In earlier revision units, the fan MOT 1 will
come ON after approximately 20 seconds)
1. Defective contactor.
a) Measure for 24VAC between wires 5 & 6. If voltage
is present, replace W1.
2. Defective Logic PCB 3.
a) Measure W1_ON signal on Logic PCB 3 between
J1-9 to TP1. Voltage should be 12VDC then drop
to less than 1VDC, 2 seconds after turning SW1 to
ON.
3. Open or improperly connected ribbon cable to J2 con-
nector on Main PCB 1
a) Inspect connection and check continuity. Replace
if open.
4) Defective Main PCB 1.
a) Replace Main PCB 1.
F. UNDER PRESSURE FAULT. AC LED ON,
FAULT Indicator and 60 PSI LED flashing.
1. Air pressure source to unit is too low.
a) Set input pressure source to 90-100 PSI.
2. Regulator set too low.
a) Adjust unit regulator to increase pressure.
3. Defective Logic PCB 3
a) Measure for 5VDC on the Logic PCB 3 between
J3-3 to J3-1. Replace Logic PCB 3 if voltage is not
present or low.
b) Measure for voltage on the Logic PCB 3 between
J3-2 to J3-1. If the voltage is between 3-4.5VDC,
replace the Logic PCB 3.
4. Defective Pressure Transducer
a) Replace Pressure Transducer
G. INPUT POWER FAULT. AC LED ON, FAULT
Indicator and 65 PSI LED flashing.
1. INPUT VOLTAGE SELECTOR SWITCH (SW2) set for
incorrect voltage
a) Set SW2 to correspond to the primary line voltage.
Turn SW1 to OFF position then back to ON position
to clear the error.
2. Defective SW2
a) Check continuity
3. Primary line voltage out of tolerance range.
a) Connect unit to voltage with unit specifications.
See section "2.04 Power supply specifications". If
using a generator, connect unit to a wall receptacle
to see if problem is corrected.
4. Defective Main PCB 1
a) Measure voltage on Main PCB 1 between test point
GND1 to J2-22.
460 VAC input = approximately 3 VDC
230 VAC input = approximately 1.5 VDC
b) With all power removed from the unit, disconnect
the ribbon cable from J2 connector on Main PCB
1. Check continuity on PCB 1 between J2-34 to test
point GND 1. With SW2 in LOW position continuity
should be present, with SW2 in the HIGH position.
It should read open