Advantech ACP-7000, User Manual

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ACP-7000 User Manual 16
3.1.3 LED Indicators for Power Voltage Status
The following table is of the individual LEDs which indicate the status of the back-
plane voltage signals.
When an LED fails to light up, it means there is a problem with one of the voltage sig-
nals. Please check if the power supply connector is properly attached to the back-
plane. If the problem persists, consult with an experienced technician.
3.2 Replacing the Cooling Fan
There are four cooling fans with filters located on the front top of the chassis. Each
cooling fan is hot-swappable and very easy to maintain. There are two cooling fans
located behind the SCSI backplane which are mentioned in Chapter 2.1.1. The fans
provide the system with ample cooling by blowing air towards the rear. Once any of
the fans fail, the alarm will beep. To stop the alarm, simply press the
Alarm Reset
button on the front panel and replace the failure fan right away. Please proceed
according to the instructions below.
3.2.1 Replacing the Front Cooling Fan
1. Push down the latch on the fan unit located on upper front to unlock it.
2. Replace the cooling fan with a new one.
3. Fix the new cooling fan unit in place.
4. Move up the latch to lock the fan unit.
Figure 3.3 Replacing the cooling fan
Table 3.2: LED Indicators for Power Voltage Status
LED Description LED on LED off
+3.3 V +3.3V signal Normal Abnormal
+5 V +5V signal Normal Abnormal
+12 V +12V signal Normal Abnormal
-5 V -5V signal Normal Abnormal
-12 V -12V signal Normal Abnormal