Synrad Novanta 48 Series, Manual, Page: 83 / 89

OPERATIONAL FLOWCHART PAGE | 83
Symptom:
•
There is no output laser beam; PWR and LASE indicators are off.
Possible Causes & Solutions:
•
No DC voltage is applied or the voltage level is out of specification.
Check that +30 VDC is available on the power supply output terminals and ensure that DC Power cable
terminal connections are tight.
Check the fuse(s) on the rear of the laser. Replace with fast-blow 10 Amp (48-1) or 20 Amp (48- 2/48-5)
AGC/3AG fuses (rated at 32 V minimum) as required.
•
A reverse DC voltage was applied to the laser.
Replace the fuse(s) with a fast-blow 10 Amp (48-1) or 20 Amp (48-2/48-5) AGC/3AG fuse (rated at 32 V
minimum) as required.
•
The laser’s DB-9 Connector is not configured correctly.
Ensure that the factory-wired DB-9 jumper plug is firmly plugged into the laser’s DB-9 Connector.
If the laser is connected through the DB-9 Connector to external circuits, check that field wiring is correct.
The remote interlock connection (Pin 3) must be grounded through your external interlock circuit to Pin 2
or Pin 4. Pin 6 must be connected to Pin 7 through your external keyswitch circuitry. Refer to Connecting
in the Getting Started section and DB-9 connections in the Technical Reference section for details. A quick
method to isolate the problem to either the laser or the field wiring is to disconnect field wiring and plug
in the factory-wired jumper plug; if the lasers operates normally with the jumper plug installed, verify
external wiring and circuit devices.
•
The laser’s Keyswitch is not set properly.
Cycle the Keyswitch to the OFF position for a few seconds, then cycle back to ON.
•
The laser is in an over temperature condition.
Allow the laser to cool. Verify that the laser is receiving the proper air or water flow per the following table.
On air-cooled lasers, verify fan operation and check for at least 57.2 mm (2.25 in) of unobstructed clearance
around the fan housing. To restart the laser, disconnect DC power, wait 30 seconds, and then reapply DC
power.
Table 5-2 Series 48 cooling specifications.