Digital Energy™ GT Series
Fig. 3.9 Bypass operation

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3.4.4Bypass operation

If the UPS is unable to deliver the demanded output power due to overload

or over-temperature, the load is switched directly to the utility supply.

The LED ‘Bypass’ will light, and the buzzer will sound continuously.

The UPS will switch back to ‘ON LINE’ mode (normal operation) when the load and/or temperature conditions returned to normal.

If a power failure occurs during bypass operation, the UPS will switch to battery operation and eventually, when the batteries

are depleted, UPS output power is lost. If the UPS functions under overload or over- temperature conditions it may not be able to protect the load.

3.4.5Replace battery

The batteries are aged and must be replaced as soon as possible to ensure fu ll protection for your equipment.

The ‘Replace Battery’ LED lights and the buzzer sends out three beeps every hour, until the batteries have been replaced.

Fig. 3.10 Replace battery

3.4.6Short circuit

In case of a short circuit in the load during ‘ON-LINE’ mode or ‘ON BATTERY’ mode the UPS will shut down and output power is lost.

The Fault LED will light and the buzzer will sound continuously.

The situation will be cleared if the short circuit is removed.

If the short circuit situation happens during ‘BYPASS’ mode, the input breaker will trip and the UPS output power is lost.

Fig. 3.11 Short circui

OPM_GTU_TWR_1K0_3K0_XUS_V015

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DE GT Series: User manual rev date 8-11- 04