Synrad p250, User Manual, Page: 96 / 106

TROUBLESHOOTING STATUS LED’S PAGE | 96
details. If your system does not provide a Shutter Open Request signal, wire a male DB-15 connector to
the User I/O connector so that Pin 15 (Input Common) is jumpered to Pin 12 (Auxiliary DC Power
Ground) and Pin 14 (Shutter Open Request) is jumpered to Pin 4 (+5 VDC Auxiliary Power).
When a Shutter Open Request signal is applied to the laser, PWM Command signals are inhibited until
the shutter is fully open. It takes approximately 30 ms for the EM shutter to fully open. When the Shutter
Open Request signal is removed from Pin 10, PWM Command signals are inhibited immediately even
though it takes approximately 120 ms for the EM shutter to fully close. Tickle pulses signals continue to
be applied to the RF modules during the close/ open EM shutter interval.
Possible Causes:
• The (Optional) Quick Start Plug or Remote Interlock/Shutter Open Request inputs are not
connected to the User I/O connector.
Connect the Quick Start Plug or interlock/shutter input field wiring to the DB-15 User I/O connector. See
User I/O connections in the Technical Reference chapter for wiring details.
Laser fault indications
p250 lasers have the ability to indicate eight specific fault conditions. In the event of certain faults, the
RDY LED will blink 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. If a No-Strike
condition occurs, the SHT LED flashes continuously until the gas breaks down into a plasma state.
Refer to the table above for a status list, the corresponding fault, and description in the comments for
basic corrective action. See the Resetting faults section for detailed corrective actions.
Possible Causes:
•
Coolant temperature is above 28 °C (82 °F) or there is inadequate coolant flow through the laser.
Check that your chiller is maintaining a water temperature between 18 °C–28 °C (64 °F–82 °F) at
a flow rate of 15.1 liters per minute (4.0 GPM).
OEM lasers can be operated at coolant temperatures up to 28 °C (64 °F to 82 °F) at a flow rate of 11.4
liters per minute (3.0 GPM).
Warning: Serious Personal Injury
On p250 OEM lasers, remote interlock faults are not latched. Clearing the fault condition re-enables
the RDY indicator and the laser will fire after the five-second delay provided the SHT indicator is lit
and a PWM Command signal is applied.
Because exposure to CO2 laser radiation in 9.3–10.6
μ
m wavelength band can inflict severe corneal
injuries and seriously burn human tissue, the OEM or System Integrator must ensure that appropriate
safeguards are in place to prevent unintended lasing.