Service manual

M0704_NX_Series_Service_Manual V2.17 2012-06-12 1
1. SAFETY INSTRUCTIONS
This Safety Notice is addressed to the Always On customer engineers who
perform maintenance of the Uninterruptible Power Supply (UPS) systems.
Electrical Safety
• Maintenance work to be preformed by factory trained customer engineers or
qualified personnel. Extremely dangerous voltage levels can exist within the
UPS system; extreme caution must be used.
• Ensure system is in maintenance bypass mode or external wrap-around bypass
mode before work is started.
• This manual is designed as an aid tool in diagnosing problems that may arise.
Always On does not assume responsibility if information causes injuries.
• Apart from the front door, do not open any other part of the UPS without
consulting the factory first. Before removing the protection screens, be sure that
the unit is completely powered off.
• Be aware that dangerous voltage can be supplied by the internal battery or
electrolytic capacitors.
• When system is in bypass mode and all fuses have been opened, dangerous
voltages may exist within the UPS system. Use extreme caution when
exchanging boards and working inside the unit.