APC 6739380EN/JC user manual Autodiagnostics, Visual check, Functional check

Maintenance (cont.)

Autodiagnostics

Note the indications supplied on the hidden control panel (lights A to N 8 ). See the "control panel" section.

In systems with one or several alphanumeric displays, check the list of alarms.

If there is a true malfunction, note the indications and alarms and call the after-sales support department.

Visual check

◗after-sales support technicians will power down the system prior to any maintenance operations.

Note:

In redundant, parallel UPS systems and frequency converters, the check may be carried out successively on each UPS or converter without interrupting the load. In other configurations and for the Static Switch Cubicle, the load must be supplied via the maintenance bypass (see the "Alarm" section).

◗clean the system regularly, particularly the air inlet and outlet grills. Check that the air circulates freely in the cubicles. Use a vacuum cleaner if necessary;

◗check that nothing hinders the ventilation at the top of the system;

◗check that all the fans operate correctly.

Functional check

◗check that lights J, K, M and N on the hidden control panel are not on to avoid an interruption in the supply of power to the load due to incorrect transfer conditions or a battery problem;

◗press the "inverter off" button and check that the buzzer and control panel lights function correctly (see the "main operating modes" section);

◗press the "inverter on" button and check again that the control panel lights function correctly;

◗run a transfer to battery test. With the

inverter on, open input switch Q1.

The orange "battery" light on the control panel should light. After two minutes on battery power, close input switch Q1.

The rectifier/charger should automatically restart and the orange "battery" light on the control panel should go off;

◗in parallel systems, run these tests on each UPS or converter.

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