Synrad Novanta 48 Series, Manual, Page: 80 / 89

TROUBLESHOOTING PAGE | 80
Troubleshooting
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Introduction
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Resetting faults
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Laser faults
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Beam delivery optics
Troubleshooting Introduction
This section is designed to help isolate problems to the module level only. Problems on circuit boards or
the laser tube are not within the scope of this guide because they are not user-serviceable assemblies; do
not attempt to repair them. Contact NOVANTA® or a NOVANTA Authorized Distributor for repair or
replacement information.
To troubleshoot the Series 48 laser, it is necessary to understand the sequence of events that must happen
before the laser can turn on and operate. Before you attempt to perform any service, we advise you to
read the entire troubleshooting guide and review the relevant schematic diagrams. Symptoms and
possible causes are highlighted by dark print and bullet points throughout this section. Information about
each symptom and cause can be found in the paragraphs following each heading.
Resetting faults
Keyswitch lasers
On Keyswitch lasers, the PWR indicator illuminates green only when the Remote Interlock input is closed
and the Keyswitch is cycled from OFF to the ON position (or the Remote Keyswitch input is opened and
then closed). After the PWR indicator illuminates, a five-second delay occurs before the laser is permitted
to lase. The LASE LED illuminates dimly when tickle pulses are applied to the laser and when PWM
Command pulses are applied (and are long enough to produce laser output) the LASE LED illuminates
and appears to brighten in relation to an increasing PWM duty cycle.
To reset a remote interlock fault after the fault condition has been cleared, the Keyswitch must be cycled
from OFF to ON (or with the Keyswitch ON, cycle the Remote Keyswitch input open and then closed).
When the PWR indicator illuminates, lasing is enabled after the five-second delay.
Caution: Possible Equipment Damage
Attempting repair of a NOVANTA laser without the express authorization of NOVANTA, will void the
product warranty. If troubleshooting or service assistance is required, please contact NOVANTA
Customer Service.
Operating the laser at coolant temperatures above 22 °C (72 °F) may result in decreased
performance and/or premature failure of electronic components.
Do not exceed coolant pressure of 414 kPa (60 PSI)!