User manual

80
®
WARNING
The instructions given in this chapter are not addressed to a normal operator but to a specialised technician,
authorised to work only if he uses the Individual Protective Gear mentioned in Chapter 3.
9.1 Introduction
This chapter contains all the information necessary for a correct maintenance of the UPS Trimod® unit.
All the operations described in this section must be carried out by authorised technicians or qualified personnel.
LEGRAND® is not liable for any injury to persons or damage to things caused by incorrect operations or activities if not
carried out according to the instructions given in this manual, with particular reference to the safety rules and regulations
that can be found in chapter 3.
To ensure optimum operation of the UPS Trimod® and continuous and effective protection of the load connected to
it, the batteries must be checked every six months after the first year of the machine’s life, via the battery calibration
function (see par 7.2.5).
9.2 Preventive maintenance
The UPS does not contain parts subject to preventive maintenance by the end user.
Therefore, with the exception of normal cleaning, all the user has to do is periodically check there are no alarms on the
display and that both fans on each power module are working correctly.
If there are any problems contact the LEGRAND® assistance centre immediately.
9.3 Periodical checks
Correct operation of the UPS must be guaranteed by periodical maintenance inspections, essential
for safeguarding the unit’s operating life and reliability.
WARNING
The periodical checks entail operations inside the UPS where dangerous voltages are present. Only maintenance
personnel, trained and authorised by LEGRAND® know all the parts of the UPS that are live with dangerous voltages
and, therefore, authorised to work on them.
During a preventive maintenance inspection, the maintenance technician must check the following:
- there are no alarms;
- the list of any events stored;
- correct operation of the static and maintenance bypass;
- integrity of the electrical installation;
- flow of cooling air;
- condition of the batteries;
- characteristics of the load applied;
- conditions of the installation premises.
9.3.1 Preparing the UPS for maintenance. Forced bypass mode.
WARNING
It is strictly forbidden to change the power modules if first the following instructions have not been scrupulously
complied with!
1. Open the door of the UPS Trimod®;
2. Enable the UPS forced bypass operation via the front display.
To do this, proceed as follows:
Config. UPS -> Bypass -> Forced Mode Config;
Enable the parameter.
In these conditions the power modules are excluded and the load is fed directly by the mains; sul pannello compare
la scritta “Bypass forzato”. When the unit is in the forced bypass mode, the wording UPS LEGRAND® on the front of the
9. Maintenance