FAQ UPS

Over or under voltage is indicated if the device, when the batteries are charged, does not provide the correct charging voltage. Alarms are indicated by flashing on the front panel at the same time as a total alarm is set.

Action in case of alarm: Check charging voltage. Measure voltage to 27.3 V. At two-pole power supply terminal, (red plus, black minus cable).

The batteries' capacity and aging are tested weekly. If the test shows that the battery capacity has dropped below 60% - 80% of the battery's original capacity, an alarm is given for an aged battery

Action in case of alarm: Replace batteries.

In the event of an inverter fault, the LED on the front panel flashes at the same time as a total alarm is set.

Action in case of alarm:

If the charging voltage in normal operation exceeds 27.9 V, the charging is disconnected.

Check with a multimeter that the device's charge does not exceed 27.9 V.

Contact support for further assistance with adjusting the voltage of the power supply unit.

The unit is tested weekly against an internal test load. This is to check that the output voltage is sufficient for UPS operation and thus that the batteries are not aged.

No alarms are given when the batteries are charged after a mains failure.

Alarm for incorrect charging voltage is given if the charger's voltage falls below 26.5 V.

Undervoltage may be natural after prolonged discharge, UPS operation. To ensure that the power supply does not break during recharging, a test is made every 45 minutes that the charging voltage is correct.

Alarms for incorrect charging voltage/broken power supply are displayed on the panel and via potential-free relay switching.

If the charging voltage in normal operation exceeds 27.9 V, the charging is disconnected. An alarm is also given on potential-free relay switching.

Every week, batteries are tested with a high, predetermined and short-term load current across internal load resistors that correspond to the batteries' rated power. Current battery capacity is measured. The microprocessor takes a "fingerprint" of the current state of the battery in the load test. The value taken is then compared with the programmed battery value. In tests that give an indication of between 20% - 40% of the original battery capacity, an alarm for an aged battery is given. Alarm is also given on potential-free relay switching/Sum-alarm.

Every week the unit is tested with internal load. If the unit's inverter does not provide sufficient output voltage, an alarm is given. Alarm is also given on potential-free relay switching.