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Device Is Powered Off Incorrectly

Publication Date:  2015-07-30 Views:  19 Downloads:  0
Issue Description
When the device is running, it may be powered off incorrectly.

Handling Process
Cause 1: The power module AC input is abnormal.

1.  Check whether all the power running/alarm indicators are off.

2.  If all the power running/alarm indicators are off, reconnect the AC or DC power plugs.
  • If the power running/alarm indicators are blinking green, the power plugs are not properly connected.
  • If the power running/alarm indicators remain off, the power supply in the equipment room is abnormal. Contact the customer.
3.  If all the power running/alarm indicators are steady red, go to cause 2.

Cause 2: The power module is faulty or in protection mode.

Check whether all the power running/alarm indicators are steady red.

If all the power running/alarm indicators are steady red, contact the technical support engineers of your vendor.
If only one power running/alarm indicator is steady red, go to cause 3.

Cause 3: The CPU is in overtemperature protection mode.

1.  Log in to the ISM. Select Event Management.
  • If no alarm about the CPU overtemperature is displayed in Events List, contact the technical support engineers of your vendor.
  • If an alarm about the CPU overtemperature is displayed in Events List, do as follows:
         The screws on the heat sink are not tightened or the air hood is not properly installed. If there is no alarm about the fan or temperature at the air intake vent in Events List, troubleshoot the fault by referring to CPU heat sink or air hood not properly installed.
         Fan failure. If there are alarms about the fan and high temperature at the air intake vent in Events List, troubleshoot the fault by referring to fan failure troubleshooting.
         Temperature abnormality. If only the air intake vent temperature alarm exists in Events List, troubleshoot the fault by referring to ambient temperature troubleshooting.

2.  Tighten the screws on the heat sink or properly install the air hood.

a.  Open the main control board enclosure top cover.

For details, see Replacing a Fan Module and Opening a Main Control Board Enclosure Top Cover.

b.  Check whether the screws on the heat sink are Tighten and the air hood is properly installed.

   If the air hood is not properly installed, reinstall the air hood to rectify the fault.
   If the fault persists after the air hood is properly installed, remove the air hood and check whether the CPU heat sink is fastened.
  • If no, fasten the CPU heat sink.
  • If yes, install the air hood.
If the fault persists after the air hood is properly installed and the screws on the heat sink are Tighten, contact the technical support engineers of your vendor.

3.  Handle the fan failure. For details, see Fan Running/Alarm Indicator Is Steady Red. If the fault persists, contact the technical support engineers of your vendor.

4.  Handle the ambient temperature abnormality. Contact the customer and check whether the temperature in the cabinet or equipment room has been abnormal recently. If the fault persists, contact the technical support engineers of your vendor.

Note:
Replacing a Fan Module ,Please download view.
Root Cause
Possible Causes:

Cause 1: The power module AC input is abnormal.

Cause 2: The power module is faulty or in protection mode.

Cause 3: The CPU is in overtemperature protection mode.

Fault Diagnosis:

Figure 1 Troubleshooting flowchart for the device powered off incorrectly



END