Modifications reserved
9 Maintenance & troubleshooting
THE OPERATIONS DESCRIBED IN THIS CHAPTER MUST BE PERFORMED
BY A SERVICE ENGINEER FROM THE MANUFACTURER OR FROM AN
AGENT CERTIFIED BY THE MANUFACTURER.
9.1 General maintenance
9.1.1 User responsibilities
There are no parts within the UPS which need to be serviced by the user, so the maintenance
responsibilities of the user are zero. To maximize the useful working life and reliability of the UPS and
its batteries, the environment in which the UPS operates should be kept cool (20°C - 25°C), dry, dust
free and vibration free. The batteries should be hold fully charged.
9.1.2 Preventative maintenance
The UPS system needs a regular and constant maintenance (preventive inspections) at least once a
year, even during the warranty period.
Maintenance inspections are essential to ensure a correct functionality and reliability of the UPS
system. When the UPS is commissioned, the commissioning field service engineer will attach a
service record book to the front of the UPS and this will be used to record the full service history of
the UPS.
During maintenance the field service engineer might carry out some or all of following checks:
• Status and function check of UPS and batteries
• UPS and batteries visual inspection (dust, mechanical damages, ..)
• Visual inspection of screws and cable connections
• Check of air ventilation and room temperature
• Check the operation and function (commutations, remote monitoring and Signaling)
• Current, voltage and frequencies measures
• Measure and record the current load conditions
• Check the load sharing (only in parallel systems)
• Battery voltage check
• Battery discharge test
• Check transfer of the load from UPS to mains operation via static bypass
• Unit cleaning
• Preventive replacement of fans and capacitors
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