Synrad Pulstar P100 Series, Руководство оператора

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maintenance/
troubleshooting
4
16 Synrad Pulstar p100 operator’s manual
Troubleshooting
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 (the Laser Ready output Opens). To reset an over volt-
age 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, the Laser Ready output Closes, and lasing is enabled provided the SHT indicator is illumi-
nated blue.
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 and the Laser Ready
output Opens. If an RF Drive Switch fault occurs, reset the laser by removing DC power to the laser, wait
30 seconds, and then reapply power. If the RF Drive Switch fault reappears, 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 (the Laser Ready output Opens). Reset the laser by removing DC power to the laser, wait
30 seconds, and then reapply power. If the RF Drive DC fault reappears, the laser requires service—contact
SYNRAD or a SYNRAD Authorized Distributor.
No-Strike condition
When a No-Strike condition occurs, lasing is limited to a maximum 5% duty cycle (at a PWM Command
frequency of 5 kHz). This fault is annunciated by the
SHT
indicator flashing continuously (the Fault De-
tected output Closes). To clear a No-Strike condition, apply tickle pulses or a PWM Command signal (<
5% duty cycle) for 30 to 60 seconds. When the gas breaks down into a plasma state, the laser will recover
and begin lasing
immediately at the commanded power level without cycling DC power. If the No-Strike
condition persists, contact SYNRAD or a SYNRAD Authorized Distributor.
Common causes of No-Strike (gas breakdown) issues are environmental conditions–like cold overnight
temperatures when the laser is powered down. In situations like this, it may take 30 to 60 seconds for gas
breakdown to occur before the laser can begin normal daily operation.
Frequency Limit condition
The
SHT
LED flashes 2 blinks, and the Fault Detected output Closes, to indicate the PWM Command
signal frequency is above the 100-kHz limit. When the PWM frequency drops below 100 kHz, the laser
will recover and begin lasing
immediately at the commanded power level without cycling DC power.
100% Duty Cycle condition
The
SHT
LED flashes 3 blinks, and the Fault Detected output Closes, to indicate the PWM duty cycle is
100%—full continuous wave (CW) operation. When the PWM duty cycle drops below 100%, the laser
will recover and begin lasing
immediately at the commanded power level without cycling DC power.