maintenance/
troubleshooting
412
Synrad Firestar ti-Series operator’s manual
Troubleshooting
Under/over voltage fault
An under voltage or over voltage fault occurs when the DC input voltage is below or above
preset limits. This fault is indicated by the RDY indicator flashing 1 blink (under voltage) or
2 blinks (over voltage). To reset an under voltage or over voltage fault, ensure that 48 VDC is
applied to the laser under full-load conditions, cycle DC power, and then toggle 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.
RF Drive DC fault
An RF Drive DC fault is indicated by the RDY indicator flashing 3 blinks. Reset the laser by
removing DC power from the laser, wait 30 seconds, reapply DC power, and then toggle the
Keyswitch from OFF to ON (or apply a Remote Reset/Start Request pulse with the Keyswitch
set to ON). If the RF Drive DC fault reappears, contact SYNRAD or a SYNRAD Authorized
Distributor.
PWM Drive fault
A PWM Drive fault is indicated by the RDY indicator flashing 4 blinks. Reset the laser by
removing DC power from the laser, wait 30 seconds, reapply DC power, and then toggle the
Keyswitch from OFF to ON (or apply a Remote Reset/Start Request pulse with the Keyswitch
set to ON). If the PWM Drive fault reappears, contact SYNRAD or a SYNRAD Authorized
Distributor.
Warning
serious
personal
injury
On Firestar ti-Series OEM lasers, remote interlock (INT) faults are
not latched. Clearing the fault condition re-enables the RDY indica-
tor and the laser will fire after the five-second delay provided that the
SHT indicator is lit and a PWM Command signal is applied. Because
exposure to 10.6 µm CO
2
laser radiation can inflict severe corneal
injuries and seriously burn human tissue, the OEM or System Integra-
tor must ensure that appropriate safeguards are in place to prevent
unintended lasing.
OEM lasers
Remote interlock fault
A remote interlock fault occurs when the Remote Interlock input opens ( the INT indicator
changes from green to red). On OEM lasers, remote interlock (INT) faults are not latched.
Re-establish the Remote Interlock signal input (INT indicator changes from red to green) to
enable the RDY indicator and begin lasing after the 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) and then cycle DC power to the laser.
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