maintenance/
troubleshooting
100
SYNRAD OEM v40 Operator’s Manual Version 4
Troubleshooting
Possible Causes:
■ Water-cooled lasers – Cooling water temperature is above 22 °C (72 °F) or there is inadequate water
ow through the laser.
Check that your chiller is maintaining a water temperature between 18 °C–22 °C (64 °F–72 °F) at a ow
rate of one gallon per minute (GPM). If water temperature is OK, check the ow rate. The simplest way
to do this, if a ow meter is not available, is to disconnect the cooling tubing from the chiller inlet (or the
drain) and run the cooling water for one minute into a ve-gallon bucket; you should have close to one
gallon. If there is much less than one gallon, check the cooling path for kinked or pinched cooling tubes or
check the chiller for a clogged or dirty lter.
■ Fan-cooled lasers – Cooling fans are not providing adequate airow to the laser.
Check that all cooling fans are clear of debris and are providing an airow rate of at least 140 CFM per fan
or at least 300 CFM if rear cooling the laser. To allow for proper airow, cooling fans must have at least
2.25" (57.2 mm) of unobstructed clearance between the outside edge of the cooling fan housing and any
mounting surface or enclosure.
Symptom:
■ A shutter closed condition is indicated:
INT LED – Green Interlock Open – Open
TMP LED – Green Over Temperature – Open
RDY LED – Yellow Laser Ready – Closed
SHT LED – O Shutter Open – Open
LASE LED – O Laser Active – Open
Possible Causes:
■ The Shutter Switch (if equipped) is Closed.
If your Firestar laser is equipped with a Shutter Switch, slide the switch to the Open position. The SHT
indicator will illuminate blue.
■ No voltage applied to Pin 10 (Shutter Open Request) on the User I/O connector.
Check to see that a positive or negative voltage (±5–24 VDC) is applied to Pin 10, Shutter Open Re-
quest, with respect to Pin 11, Input Common, on the User I/O connector (refer to User I/O connections in
the “Technical Reference” chapter for details). If your system does not provide a Shutter Open Request
signal, connect the factory-supplied Quick Start Plug to the User I/O connector on the laser’s rear panel
or wire your male DB-15 connector so that Pin 11 (Input Common) is jumpered to Pin 12 (Auxiliary DC
Power Ground) and Pin 10 (Shutter Open Request) is jumpered to Pin 4 (+5 VDC Auxiliary Power).
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