Led Indicators For Power Status - Advantech IPC-623 Series User Manual

If the system is connected with a single PS/2 power supply, the PWR
LED is always green when the power is on.
When the PWR LED is RED, it indicates a redundant power supply
module failure. To stop the alarm beep, press the Alarm Reset button.
Examine the redundant power supply module right away and replace
the failed module with a good one.
When the FAN LED is RED, it indicates a failed cooling fan, and the
alarm is also activated. To stop the alarm beep, press the Alarm Reset
button and then replace the failed fan with a good one immediately.
If the TEMP LED is RED, it means that inside of the chassis is
overheated. An audible alarm will be activated. To stop the alarm
beep, press the Alarm Reset button. Inspect the fan filter and the rear
section of the chassis immediately. Make sure the airflow inside the
chassis is smooth and not blocked by dust or other particles.

3.1.3 LED indicators for Power Status

The following table is the individual LED which indicates the status of
the backplane voltage signals.
LED
+5V +5V signal
+12V +12V signal
-5V -5V signal
-12V -12V signal
+3.3V +3.3V signal
Table 3-2: LED indicators for Power Status
When an LED fails to light up, it means there is a problem with one of
the voltage signals. Please check if the power supply connector is
properly attached to the backplane. If the problem persists, consult
with an experienced technician.
Description
21
LED on LED off
Normal Abnormal
Normal Abnormal
Normal Abnormal
Normal Abnormal
Normal Abnormal
IPC-623B User's Manual