maintenance/
troubleshooting
411
Synrad Firestar ti-Series operator’s manual
Troubleshooting
Laser faults
Firestar ti-Series lasers have the ability to indicate four specific fault conditions. In the event of certain
faults, the RDY LED on the laser blinks an error code, pause four seconds, and then repeat the error code.
This sequence continues until the fault is corrected and the laser is reset by cycling DC power to the laser.
Table 4-6 lists error codes, the corresponding fault condition, and describes any corrective action possible
in the field.
Table 4-6 Laser error codes
Number of Blinks
Ready (RDY) Indicator Fault Condition Corrective Action in Field
1 blink Under Voltage Fault Verify 48 VDC is measured at laser under load
2 blinks Over Voltage Fault Verify 48 VDC is measured at laser under load
3 blinks RF Drive DC Fault None
4 blinks PWM Drive Fault None
Resetting faults
Keyswitch lasers
Remote interlock fault
A remote interlock fault occurs when the Remote Interlock input opens ( the INT indicator
changes from green to red). To reset a remote interlock fault, re-establish the Remote Inter-
lock signal input (INT indicator changes from red to green) and cycle the Keyswitch from OFF
to ON (or apply a Remote Reset/Start Request pulse with the Keyswitch set to ON). When
the RDY indicator illuminates, lasing is enabled after a five-second delay.
Over temperature fault
Over temperature faults occur when thermal limits in the laser are exceeded (the TMP indica-
tor changes from green to red). To reset an over temperature fault, lower coolant temperature
below 30 °C (water-cooled) or below 40 °C (air-cooled), cycle DC power to the laser, and then
cycle the Keyswitch from OFF to ON (or apply a Remote Reset/Start Request pulse with
the Keyswitch set to ON). When the RDY indicator illuminates, lasing is enabled after a five-
second delay.
Note: Water-cooled ti-Series lasers can be operated at coolant temperatures up to 30 °C to
reduce problems associated with condensation; however, this may result in decreased
laser performance and/or reduced laser lifetime.
Shutter fault
A closed shutter is not considered a fault condition. When a Shutter Open Request signal is
applied and the manual Shutter Switch is set to Open, lasing is enabled after a five-second delay
provided that the RDY indicator is illuminated yellow.
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