Trouble Shooting - Thermal Arc 180 AC User Manual

Pin 12 : Cooling default input (+20V when default)
Pin 13 : Over voltage protection or phase missing input
Pin 14 : NTC thermistor return (0-5V) for primary temperature measurement
Pin 15 : electronic ground
Connector J3, J4 : options, not used
Connector J5 : matches with J2 of L92861 PCB
Pin 1 : electronic ground
Pin 2 : open drain for thermal default led on/off
Pin 3 : +15V DC
Pin 4 : current control input (0-3.4V)
Pin 5 : Arc force control output
Pin 6 : ENABLE output for inverter start/stop (0-5V)
Pin 7 : +20V DC
Pin 8 : -20V DC
Pin 9 : NTC thermistor return (0-5V) for primary temperature measurement
Pin 10 : striked arc information (0V when striked, +5V when not striked)
Pin 11 : Fan control (PWM from front panel.
Pin 12 : 15V AC signal
Pin 13 : Positive polarity of shunt (same as positive output of generator).
Pin 14 : Negative polarity of shunt
Pin 15 : Negative output of generator

20. TROUBLE SHOOTING

BEWARE : BEFORE ANY INTERNAL INTERVENTION, disconnect the power source from the power
supply. Internal voltages are high and dangerous
POSSIBLE CAUSES
ON/OFF main switch is OFF
Power supply cable is cut
No main supply
Defective ON/OFF main switch
Input voltage > 260 V
Power source supplied between 2 phases (400V)
Duty cycle over rated (particulary if ambient t°
is > 25°C)
Insufficient cooling air
Very dusty machine
Fan doesn't start
THERMAL ARC 180 AC/DC
MAINTENANCE
DIGITAL DISPLAY AND ORANGE INDICATOR F20 OFF
DIGITAL DISPLAY OFF AND ORANGE INDICATOR F20 ON
= INPUT VOLTAGE OVER RATED LIMIT
DIGITAL DISPLAY SHOW « tH » AND ORANGE INDICATOR F20 ON
USER'S MANUAL
= NO SUPPLY
Put the switch ON
Check cable and connections
Check circuit breaker and fuses
Replace the switch
Check supply voltage
Connect the machine to proper line voltage (230V)
= WARMING UP
Let the machine cool, it will automatically start again
Clean the air inlets
Open the machine and blow it through
Replace the fan
Page
32/36
Notice NOT 034
Rev : 00
Date : 03/12/02
CHECKING / REMEDY