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Riello Master MPS — is a series of three-phase online UPS (VFI-SS-111) with a capacity of 10 to 800 kVA, designed for industrial, energy and critical infrastructures. The devices provide full galvanic separation between input and output using an output isolation transformer. Thanks to its high overload capacity, support for parallel operation and static bypass, Master MPS is used for uninterrupted power supply of industrial equipment, medical facilities, server and telecommunications centers. Diagnostics includes checking all functional units: inverters, rectifiers, transformers, batteries, cooling, electrical connections and control logic.
What diagnostics include
Inspection / audit
- Configuration identification: power, connection diagram, presence of external bypass or parallel operation.
- Assessment of the external condition of the housing, connection of power cables, condition of switching elements.
- Visual inspection of seals, protection elements, condition of insulation, ventilation holes.
- Fixation of operating conditions: dust, temperature, humidity, ventilation, presence of thermal load.
Electrical tests
- Control of input network parameters: voltage, frequency, phase symmetry, stability.
- Output voltage check: RMS accuracy, waveform, frequency stability.
- Testing system behavior during transitions: mains ↔ inverter ↔ bypass.
- Analysis of the response to sudden changes in load (if possible — under simulated load).
Inverter / rectifier / bypass check
- Evaluation of inverter operation: harmonic level, load, temperature, accuracy of output parameters.
- Analysis of the rectifier: input voltage, ripple, battery charging current level.
- Static bypass testing: switching speed, synchronization with the network, manual and emergency switching.
- Checking the operation of the output transformer (available in all Master MPS models): heating, hum, insulation resistance.
Battery (battery system)
- Inspection of the battery array or external cabinets: physical condition, connections, ventilation.
- Measurement of voltage by battery groups, check of charge balance.
- Control of charger parameters: current, voltage, Float/Boost modes.
- Optional autonomy test: fixing the discharge time (upon agreement with the customer).
Cooling
- Checking the operation of fans: speed, noise level, uniformity of operation.
- Evaluation of the temperature of the main components: inverter, transformer, controller, battery.
- Inspection of air ducts, grilles, condition of dust filters.
Communications / monitoring
- Front panel testing: access to logs, reading parameters, changing configurations (within permission).
- Checking SNMP, RS-232, Modbus or CAN ports: data transfer, stability connection, integration with BMS/SCADA.
- Analysis of system logs: error codes, accident events, mode switching, module shutdowns.
Technical report
- Formation of a structured report: assessment of the state of each node, graphs and event decoding.
- Identification of critical and warning states: overload, battery wear, cooling failures.
- Recommendations for prevention, maintenance or modernization: cleaning, replacement, software update.
When diagnostics are needed
- At least once a year — as part of routine maintenance of critical power supply facilities.
- After bypass errors, transformer overheating, inverter failure or reduced backup time.
- Before commissioning after long-term storage or in case of load expansion.
- After emergency power grid failures or suspected battery degradation.
Why choose Total-Energo LLC
- System expertise in servicing Riello Master MPS in industrial, IT and energy facilities.
- Possibility of diagnostics without stopping the load (if there is an external bypass).
- Professional equipment for reading logs, analyzing phases and checking transformers.
- Full technical support after diagnostics: battery selection, modernization, repair, consultations.