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Riello Multi Sentry — are three-phase online UPSs (VFI-SS-111) with a capacity of 10 to 200 kVA, designed for uninterrupted power supply of critical equipment in data centers, telecommunications nodes, hospitals, banks and industrial systems. Thanks to high efficiency (up to 96.5%), a wide input voltage range and an intelligent control system, Multi Sentry ensures stable operation even in unstable power grids. Diagnostics cover all major components: inverter, rectifier, bypass, battery, cooling and monitoring systems.
What diagnostics include
Inspection/audit
- Configuration identification: model, rated power, operating mode (single/parallel).
- Visual inspection of the housing, condition of connections, protective grounding, ventilation holes.
- Analysis of the operating environment: temperature, humidity, dust, access to equipment for service.
- Verification of correct phase connection and compliance of installation with Riello requirements.
Electrical tests
- Control of input voltage parameters: phase symmetry, frequency stability, presence of overvoltages or sags.
- Analysis of output characteristics: RMS accuracy, load stability, harmonic distortion.
- Testing switching between mains power, inverter and bypass — continuity of output voltage.
- Checking the response to impulse loads and load changes in online mode.
Inverter / rectifier / bypass test
- Evaluation of inverter operation: voltage stability, element temperature, waveform, phase load.
- Analysis of the rectifier: charge current, parameter compliance, response to input voltage changes.
- Testing static bypass functions: manual and automatic switching, synchronization with the network.
- Reading internal event logs: switching history, failures, overloads.
Battery (battery system)
- Checking the connection and integrity of battery cabinets or external units: terminals, cables, housings.
- Measurement of voltage and balance between battery groups, level control. degradation.
- Evaluation of charging modes: Float, Boost, charger response to voltage drops.
- Optional — discharge testing under controlled load (upon agreement).
Cooling
- Evaluation of cooling efficiency: checking fans, temperatures on the inverter, rectifier, battery.
- Inspection of ventilation ducts and filters: presence of dust, clogging or damage.
- Temperature protection control: compliance with limits and reaction when temperatures are exceeded.
Communications / monitoring
- Checking the display operation: correctness of parameter display, access to event logs.
- Testing SNMP, Modbus, RS-232/485, USB (depending on configuration): communication stability.
- Evaluation of integration with external monitoring systems (BMS, SCADA) — completeness and relevance of the transmitted data.
Technical report
- Documentation of the results of testing all systems: power modules, batteries, cooling, communication.
- Identification of deviations: battery degradation, inverter errors, overheating, signal distortion.
- Recommendations for maintenance or modernization: cleaning, battery replacement, software firmware, load balancing.
When diagnostics are needed
- Regularly — once every 12 months, in accordance with the Riello UPS maintenance regulations.
- After switching to bypass, triggering of alarms, detection of a drop in autonomous time.
- Before or after a system update, when connecting a new load or after network failures.
- After long-term storage or downtime.
Why choose Total-Energo LLC
- System expertise in Riello Multi Sentry diagnostics in the banking, telecommunications and IT sectors.
- Diagnostics without stopping the load — if there is an external bypass or reserve.
- Professional analytics based on logs, full component testing, adaptation of recommendations to real conditions.
- Providing a structured technical report and support during the modernization or service process.