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Legrand DAKER DK Plus — is a modern single-phase online UPS (VFI) with double conversion, designed to provide uninterrupted power supply to critical consumers in telecommunications systems, server, medical institutions, financial institutions and automated systems. The series supports installation in Tower format or in 19” cabinets, has a wide power range (1-10 kVA) and compatibility with external battery modules. High-quality diagnostics allow you to maintain system performance, detect potential failures and ensure guaranteed autonomy.
What diagnostics include
Inspection / audit
- Identification of model, power configuration, software version.
- Assessment of the condition of the case, ventilation holes, connections and location of the UPS in the cabinet/rack.
- Verification of compliance with operating conditions: temperature, humidity, presence of dust.
Electrical tests
- Measurement of input voltage and frequency parameters.
- Verification of output voltage: stability, waveform, frequency accuracy.
- Testing of the transition between the network, inverter and bypass without loss of power.
- Assessment of the quality of power supply during load changes.
Inverter / bypass / rectifier test
- Inverter stability analysis: voltage, temperature, waveform.
- Rectifier test: charge voltage, response to network changes.
- Automatic and manual bypass testing: correct switching and event log.
Battery (battery system)
- Inspection of built-in or external battery packs: integrity, ventilation, connection.
- Battery voltage measurement, cell uniformity assessment.
- Charging mode analysis: Float, Boost, battery control algorithm testing.
- Optional — discharge test with recording of battery life (with customer consent).
Cooling
- Functional check of fans and temperature sensors.
- Analysis of temperature conditions under load.
- Inspection of ventilation ducts for clogging.
Communications / monitoring
- Checking the correct operation of the LCD display and user interface.
- Testing communication ports: USB, RS-232, SNMP (if a card is available), Dry contacts.
- Evaluation of integration with Legrand monitoring software or third-party BMS systems.
Technical report
- Documentation of all parameters that were checked.
- Identification of signs of battery degradation, wear of fans or software errors.
- Provide recommendations for maintenance or component replacement.
When diagnostics are needed
- At least once a year — according to technical regulations.
- After bypass trips or errors recorded in logs.
- After installing new battery modules or expanding the system.
- After long-term storage or load change.
Why choose Total-Energo LLC
- Experience working with Legrand single-phase systems, in particular DAKER DK Plus in rack and Tower versions.
- Diagnostics without power interruption, with saving logs and previous settings.
- Use of certified equipment for checking parameters and diagnosing batteries.
- Preparation of a full technical report with transparent recommendations for the customer.