Thermal Dynamics A-08950, Service Manual

Page: 62 / 108

CUTMASTER 12mm
SERVICE 5-14 Manual 0-5077
K. AC LED ON, yellow TEMP LED is ON, red
FAULT Indicator is flashing.
1. Air flow through unit is restricted
a) Provide adequate airflow. See Ventilation
Clearance Requirements section 2.04.
2. Exceeded duty cycle of the power supply.
a) Allow unit to remain ON, but at idle, with
fan running to cool power supply. See Power
Supply Specifications section 2.04 for duty
cycle information.
NOTE
When the unit is turned ON the cooling fans MOT
1 & 2 will remain OFF. (In earlier units MOT 1 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 tem-
perature condition occurs, the fans will continue
to run while the condition exists and for a ten (10)
minute period after the condition is cleared.
3. Fan(s) not turning
a) Measure voltage at plug between J7-1 to J7-2
and between J81 to J8-2 on Main PCB for
12VDC If voltage is present replace fan.
4. Defective Main PCB
a) Measure voltage at plug between J7-1 to J7-2
and between J8-1 to J8-2 on Main PCB for
12VDC. If voltage is missing at either recep-
tacle, replace Main PCB.
5. Defective Logic PCB
a) Replace Logic PCB
L. AC LED ON, TEMP, GAS, DC LED's are
OFF, FAULT Indicator is flashing.
MIN
PRESSURE LED is flashing. Gas is not
flowing.
1. Gas supply not connected to unit
a) Connect gas supply to unit
2. Gas supply not turned ON
a) Turn gas supply ON
3. Gas supply pressure too low.
a) Set gas supply pressure to 95-120 psi
4. Air Pressure Control Regulator set too low.
a) Adjust AIR PRESSURE CONTROL to set
pressure as specified in section 4.02 Setting
Operational Pressure.
M. INTERNAL ERROR
FAULT Indicator and 90 PSI Indicator 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
N. MAX PRESSURE ERROR
MAX Pressure LED is lit.
1. Gas pressure set too high
a) Reduce gas pressure
2. Defective Logic PCB
a) Replace Logic PCB
O. AC LED ON, TEMP LED OFF, GAS LED
ON, Gas does not flow in SET mode using
a hand torch or a machine torch without
remote solenoid.
1. Defective gas solenoid (SOL1)
a) Measure voltage on Main PCB between J5-1 to
J5-3 for 12 VDC. If voltage is present, change
SOL 1
2. Defective Logic PCB
a) Measure on Main PCB between J2-12 to test
point GND1 for 12VDC. If voltage is present,
replace Main PCB.
3. Defective Main PCB
a) Replace Main PCB