Possible Problems And Solutions - LEGRAND Whad 0.8 kVA Manuel D'installation

7 Possible problems and solutions

Problems
When the UPS is switched on, the buzzer
sounds and the red Status Indicator makes
intermittent short-long flashes, then the UPS
switches off after 15 seconds
The UPS works but every 20 seconds there is
a short beep and the yellow Status Indcator is
always lit up.
The UPS works but it emits an alternating,
slow-fast intermittent sound, the red Status
Indcator flashes fastly
The UPS beeps continuously and the Status
Indicator is continuosly yellow, after which the
UPS switches off.
The UPS works but the green Status Indicator
flashes quickly
The UPS emits an alternating, slow-fast
intermittent sound, and the red Status
Indicator flashes quickly
Whad 0.8, 1, 1.5 kVA
solutions
- The connection of the neutral conductor is
wrong: make a 180° inversion of the power
supply plug, or exclude the neutral sensor
(using the UPS Communicator software
supplied)
- Check that power is present at the mains
socket.
- Check that the UPS power supply cable is
correctly inserted in both the mains socket
and in the UPS connector
- There is an overload on the UPS output.
Reduce the quantity of appliances
connected so that the load does not exceed
the maximum power that the UPS can
supply.
- The UPS has completely flattened its
batteries; it can only start up again when
the input line is present. Check the
magneto-thermal or differential switches
that precede the UPS
- The mains supply is out of the limits
permitted for the voltage and/or frequency,
but it can still be used by the UPS. However,
the bypass function is not operational.
- The thermic protection has intervened.
Switch the UPS off and wait for a few
minutes so that the internal temperature
of the UPS can get back to normal. Check
that the fans operate correctly and that the
relative airflow is not obstructed (e.g. if the
UPS is too close to a wall).
- There is a fault on one of the internal
circuits. Contact your nearest service centre.
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