V Guard Du 1000 Smart User Manual -

Buzzer: Chirps once for mode change; continuous beep during low battery; beeps every 4 sec in battery mode (can be muted).

Powering Off: Press and hold the switch until the display turns off. It is recommended to turn the UPS off if leaving the premises for extended periods.

| Parameter | Value | |-----------|-------| | Model | DU 1000 Smart | | Capacity | 1000 VA | | Input Voltage Range | 140V – 290V AC | | Output Voltage | 210V – 230V (regulated) | | Frequency | 50 Hz ± 5% | | Cut-off Type | Digital time-delay / under/over voltage | | Display | 3-digit 7-segment LED / LCD (Smart series) | | Mounting | Wall-mount or floor | | Protection | Overload, short-circuit, thermal cut-off |

The following specifications define the performance envelope of the device: v guard du 1000 smart user manual

| Problem | Possible Cause | Solution | |---------|----------------|----------| | Display blank, no output | No mains / power cord loose / fuse blown | Check wall socket; replace fuse (same rating) | | Display shows HI/LO | Supply voltage out of range | Wait for voltage recovery | | Appliance not starting | Time delay active (3–5 min) | Wait; do not power cycle repeatedly | | Continuous beeping | Overload or short circuit | Reduce load; check appliance for fault | | Output voltage fluctuating rapidly | Heavy load variation or internal fault | Remove all loads. If still fluctuating, contact service | Buzzer: Chirps once for mode change; continuous beep