8.2Maintenance

1.Maintenance of the UPS and battery replacement should be performed by well trained expert personnel.

2.Batteries that have not been used for some time must be charged up every three months at normal ambient temperature and every two months if the ambient temperature is high.

3.The three switches on the back, from top to bottom, are as follows: Mains fuse-switch disconnector, manual service bypass switch and output switch. Switching the mains fuse-switch disconnector on causes mains voltage to be supplied to each module of the PROTECT 1.M. Switching the output switch on allows output voltage to be delivered from the modules of the UPS to the loads. The maintenance switch is used for UPS maintenance. The UPS can only run in inverter operation if the manual service bypass switch is switched off and the cover has been fitted.

Note: Make sure that the PROTECT 1.M has been changed over to bypass operation before you switch on the manual service bypass switch. The load connection is immediately supplied with voltage when the manual service bypass switch is actuated. Only trained and qualified personnel should operate this switch.

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