12
Operation
Indicators
OVERLOAD indicator
This indicator is off (default) during normal operation. It lights RED when the output is
driving an excessive load (higher than the 300 W output rating).
OVERTEMP indicator
This indicator is off (default) during normal operation. It lights when one of the two
following temperature/fan related faults occur:
• The LED continuously lights RED for up to 2 minutes when the internal temperature
exceeds safe operating limits due to overload or inadequate ventilation. The system
continues to operate normally for this interval and the LED automatically resets to 'off'
if the load is minimized or the cooling efficiency is improved, lowering the internal
operating temperature to a safe level. If the 2 minute time interval is exceeded, the LED
will flash on and off each second at a 50% duty cycle, and the 300 VDC output is
switched off to allow the fans to lower the internal operating temperature to a safe
level.
• The LED flashes RED with 1 short pulse every 2 seconds if fan 1 fails or its rotor locks, 2
short pulses if fan 2 fails, or 3 short pulses if both fans fail simultaneously.
CABLE FAULT indicator
This indicator is off during (default) normal operation. It lights RED when one of the
following cases occurs:
• There is a short, open or shield fault in the attached SMPTE Hybrid Fiber cable;
• No SMPTE Hybrid Fiber cable is connected (= open cable connection)
SECONDARY AC READY/ON indicator (only for HPE-300-2AC model)
• This indicator is off when no AC is applied to the Secondary mains input (unit operating
on primary AC mains).
• It lights GREEN when AC power is present at the secondary mains input indicating its
availability for use.
• It lights solid YELLOW when the secondary AC mains source is powering the unit with
primary mains missing.
• The indicator flashes YELLOW when the unit is monitoring the condition of the primary
AC mains input for 30 seconds, after which it returns to GREEN when the primary AC
mains is re-established.
3
4
5
6
