maintenance/
troubleshooting
4
14
Synrad
Firestar i401
operator’s manual
Troubleshooting
Over Temperature fault
Over-temperature faults occur when coolant temperature or flow limits in the laser are exceeded (the
TMP
LED changes from green to red and the
Fault Detected
output Closes).
To reset an over-temperature fault, lower coolant temperature below 28 °C to cool the laser and then cycle
DC power to the laser. Once the
TMP
indicator turns green (
Fault Detected
output Opens) and the
RDY
lamp is illuminated, lasing is possible after the five-second delay.
Note:
Because of the over-temperature latch circuit, the
TMP
indicator remains red (and the
Fault De-
tected
output remains Closed) prior to cycling power even after the laser has cooled sufficiently
to begin operation. If the
TMP
indicator remains red after cycling power, the laser is not suf-
ficiently cooled or the flow rate is too low—cool the laser for several more minutes and/or verify
the flow rate and then cycle power.
Under Voltage fault
An under voltage fault occurs when DC input voltage falls below a preset limit of 46.5 VDC. This fault
is indicated by the
RDY
LED flashing 1 blink. To reset an under voltage fault, first correct the voltage
problem and ensure that 48 VDC is measured at the laser’s DC power terminals under full-load conditions.
Next, cycle DC power off and then on again. When the
RDY
LED illuminates, lasing is enabled after a
five-second delay.
Over Voltage fault
An over voltage fault occurs when DC input voltage rises above a preset limit of 49.5 VDC. This fault
is indicated by the
RDY
LED flashing 2 blinks. To reset an over voltage fault, first correct the voltage
problem and ensure that 48 VDC is measured at the laser’s DC power terminals under full-load conditions.
Next, cycle DC power off and then on again. When the
RDY
LED illuminates, lasing is enabled after a
five-second delay.
RF Drive Switch fault
An RF Drive Switch fault occurs on power-up when the tube fails to breakdown or a fault occurs in the RF
Driver’s 48-volt switching circuitry. In this case, the
RDY
LED flashes 3 blinks. If an RF Drive Switch fault
occurs, reset the laser by removing DC power to the laser, wait 30 seconds, and then reapply power. When
the
RDY
LED illuminates, lasing is enabled after a five-second delay. If the RF Drive Switch fault reap-
pears, the laser requires service—contact SYNRAD or a SYNRAD Authorized Distributor.
PWM Drive fault
A PWM Drive fault indicates a problem in the laser’s internal RF circuitry and causes the
RDY
LED to
flash 4 blinks. Reset the laser by removing DC power to the laser, wait 30 seconds, and then reapply power.
When the
RDY
LED illuminates, lasing is enabled after a five-second delay. If the RF Drive DC fault reap-
pears, the laser requires service—contact SYNRAD or a SYNRAD Authorized Distributor.