Download 1. Introduction - Beijer Electronics

7. Maintenance
Troubleshooting
Table 7-13 shows the symptoms of some problems with their possible causes and solutions. If the
problem persists, consult the Altus Technical Support.
Symptom
Possible Cause
Solution
Does not
power on
Lack of power supply or
incorrectly powered.
- Verify if the CPU is connected properly in the rack
- Power off and take off all modules from the bus,
but the power supply and the CPU
- Power on the bus and verify the power supply
functioning, the external and the one in the rack
- Verify if the supply voltage gets to the Nexto
power supply contacts and if is correctly polarized
Does not
communicate
Bad contact or bad
configuration.
- Verify every communication cable connection
- Verify the serial and Ethernet interfaces
configuration in the MasterTool IEC XE software
Bad connection or not
mounted
- Verify if the memory card is properly connected in
the compartment
- Verify if the memory card was put in the right side,
as indicated on the CPU frontal panel
- Verify if the memory card wasn’t unmounted
through MS button, placed on the frontal panel,
visualizing the indication on the CPU graphic
display
Does not
recognize the
memory card
Table 7-13. Troubleshooting Table
Preventive Maintenance
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It must be verified, each year, if the interconnection cables are connected firmly, without dust
accumulation, mainly the protection devices
In environments subjected to excessive contamination, the equipment must be periodically
cleaned from dust, debris, etc.
The TVS diodes used for transient protection caused by atmospheric discharges must be
periodically inspected, as they might be damaged or destroyed in case the absorbed energy is
above limit. In many cases, the failure may not be visual. In critical applications, is
recommendable the periodic replacement of the TVS diodes, even if they do not show visual
signals of failure
Bus tightness and cleanness every six months
For further information, see Nexto Series Manual - MU214600
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