Olson Technology OTEB-CL-B - Manual (Page 11)

025-000634X1 Page 9 of 11
5.0 FAULTS
The OTEB-CL-B series EDFA monitors system operation and offers warning of potential problems.
It can correct the majority of problems of the equipment, such as: Equipment tolerance, laser
aging, and changing temperature. The PUMP laser will usually go on working when an alarm is
present. The alarm will disappear if the system parameter recovers into normal range. Some
serious warnings can be eliminated by restarting the power supply of the equipment.
Most warnings will be sent out when the a system parameter is close to or exceeds the permitted
range. In most cases, users cannot modify these status conditions. Status condition limits
require special programming equipment, so the modification can only be made in the factory.
5.1 Warning Status
When the pump laser is in warning status, the status LED will turn red and note of the
status will be briefly displayed on the screen. The warning will not necessarily make the
EDFA stop running. If the warning is removed, it shows that the offending parameter has
returned into normal limits. The screen & LCD will return to their normal status and there
is no need for intervention. However, the problem that caused the alarm should not be
ignored, because there may be some serious system faults.
Unit status Status display LED color Explanation
Laser is off Key Off Red The EDFA isn’t operating. It is shut down.
Case temperature - Red Warning when the temp ≥60°C.
Input Input Low Red Optical output power is low.
Output Output Low Red Optical output power is low.
Table 5-1 Warning Status
5.2 Alarm Status
When the pump laser sends out a warning, it may stop working to prevent damage. The
alarm is because some parameter has exceeded its safe working limits or some situation
that may cause damage to the laser. The alarm can usually be eliminated by restarting the
power supply or resetting the key switch. If the user cannot eliminate the alarm, please
contact Olson Technology, Inc.