Riello UPS Sentinel Tower STW 5000

Questions and Answers

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Jessica WestNov 28, 2025
Why won't my Riello UPS Sentinel Tower STW 5000 Power distribution unit switch to standby mode?
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  Jacob GentryNov 28, 2025
  If your Riello UPS Power distribution unit is connected to the mains but doesn't switch to standby mode (the display doesn't light up), several issues could be the cause: * A missing connection to the input terminal: Connect the mains to the terminals following the instructions in the “POWER CONNECTION” section. * A missing neutral connection: The UPS requires a neutral connection to function. Connect the mains to the terminals as explained in the “POWER CONNECTION” section. Note: the absence of this connection can damage the UPS and/or the load. * The isolator (SWIN) is open: Close the isolator. * Mains power is missing (blackout): Ensure the mains power is present. If necessary, perform a battery start-up to power the load. * The upstream protection device has been triggered: ...
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Angela DanielsAug 25, 2025
What does it mean if my Riello UPS Sentinel Tower STW 5000 Power distribution unit display shows F37 or L37?
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  Bradley UnderwoodAug 26, 2025
  If your Riello UPS Power distribution unit display shows one or more of the following codes: F37, L37, it could be due to several factors: * Ambient temperature exceeding 40°C. * Heat sources positioned too close to the UPS. * Obstructed ventilation slits or proximity to walls. * A fault within the temperature probe or in the battery charger cooling system. To address this, eliminate the cause of the overtemperature. Activate the maintenance bypass (SWMB) if present, open the battery fuse holder isolators (SWBATT), and allow the battery charger heat sink to cool down. Then, close the battery fuse holders. If the problem continues, contact your nearest service center. Warning: Never open the SWBATT fuse holder isolators during battery operation.
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Douglas RoachAug 27, 2025
What does it mean if my Riello UPS Sentinel Tower STW 5000 Power distribution unit shows codes F03, F04, F05, A08, A09, or A10?
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  Kyle CruzAug 27, 2025
  If your Riello UPS Power distribution unit display shows one or more of the following codes: F03, F04, F05, A08, A09, A10, check the connection on the phases, ensuring that with the three-phase connection the switch is in the “? 3~” position and that Phase 2 and Phase 3 are correctly connected. If you are using a single-phase connection, make sure the switch is in the “? 1~” position. If the issue persists, it is possible that the internal protection fuses on the phase or on the input relay are broken, and you should contact the nearest service centre.
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Frank GonzalezAug 27, 2025
What to do if my Riello UPS Power distribution unit display shows code A26?
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  Tyler BrockAug 27, 2025
  If the Riello UPS Power distribution unit display shows the code A26, it indicates that the battery fuses are blown or the fuse holder isolators are open. Replace the fuses or close the battery fuse holder isolator (SWBATT). If necessary, replace the fuses with others of the same type.
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James DuncanAug 30, 2025
What to do if my Riello UPS Power distribution unit has no power to the load?
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  Kimberly MaciasAug 30, 2025
  If no power reaches the load from your Riello UPS Power distribution unit, it might be due to a few reasons: * A missing connection to the output terminal: Connect the load to the terminals. * The UPS is in standby mode: Run the start-up sequence. * The STAND-BY OFF mode is selected: Change the operating mode, as this mode only powers the loads during a blackout. * A malfunction of the UPS with the automatic bypass out of use: Insert the maintenance bypass (SWMB) and contact the nearest service centre.
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steven76Sep 23, 2025
What does it mean if my Riello UPS Power distribution unit display and fans are off but the load is powered?
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  Tracy DouglasSep 23, 2025
  If the display is off, the fans are off, but the load is powered on your Riello UPS Power distribution unit, it indicates a fault in the auxiliary power supplies, with the UPS in bypass supported by the redundant power supply. Activate the maintenance bypass (SWMB) if present. Switch off the UPS, wait for a minute, and turn the UPS back on. If the display does not turn on or if the sequence fails, contact the nearest service centre, leaving the UPS in manual bypass mode.
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Frank SchmidtSep 17, 2025
What to do if my Riello UPS Sentinel Tower STW 5000 display shows the code L11?
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  David HudsonSep 17, 2025
  If the Riello UPS Power distribution unit display shows the code L11, it indicates a static bypass rupture or fault. Activate the maintenance bypass (SWMB) if present, turn the UPS off and back on again, and exclude the maintenance bypass. If the problem persists, contact the nearest service centre.
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arianayangSep 18, 2025
What to do if my Riello UPS Sentinel Tower STW 5000 display is not working properly?
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  Sean CoxSep 18, 2025
  If the display of your Riello UPS Power distribution unit shows nothing or provides incorrect information, it indicates that the display has power supply problems. Activate the maintenance bypass (SWMB), shut down the UPS completely, and wait for a few seconds. Turn ON the UPS again and verify display regular operation. Exclude the maintenance bypass. If the fault persists, contact the nearest technical support centre.
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Leah NelsonSep 8, 2025
What to do if my Riello UPS Sentinel Tower STW 5000 Power distribution unit display shows code C01?
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  Brady JacksonSep 9, 2025
  If the Riello UPS Power distribution unit display shows the following code: C01, it means that the jumper is missing from the R.E.P.O. connector or it is not inserted correctly. Assemble the jumper or make sure that it is inserted correctly.
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Patrick LarsonSep 6, 2025
What does it mean if my Riello UPS Sentinel Tower STW 5000 Power distribution unit display shows code A13?
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  Paul WalkerSep 6, 2025
  If the Riello UPS Power distribution unit display shows the code A13, the issue is due to the protection device upstream from the bypass line being open (only if the bypass is separate) or the bypass isolator being open (SWBYP only if the bypass is separate). Restore the protection device upstream, ensuring there is no overload or short circuit at the output of the UPS. Also, close the isolator.

Summary

Introduction

Environmental Protection

Company's commitment to environmental aspects, material analysis, and recyclable packaging.

Product Disposal Guidelines

Instructions for the safe and environmentally responsible disposal of the UPS and battery box.

Presentation

UPS Views and Components

Visual identification of key UPS components on front, rear, and display panels.

Battery Box and Charger Options

Details on optional battery boxes and additional internal battery chargers for extended runtime.

Installation

Initial Content Check

Procedure for verifying all components are present after unpacking the UPS or battery box.

UPS Pallet Removal

Step-by-step instructions for safely removing the UPS or battery box from its shipping pallet.

Installation Environment Requirements

Recommended conditions for UPS installation, including temperature, humidity, and ventilation.

UPS Placement Guidelines

Guidelines for positioning the UPS for optimal operation and maintenance access.

Power Connection for 5-6 kVA Models

Instructions for connecting the 5-6 kVA UPS models to the power supply and load.

Power Connection for 8-10 kVA Models

Instructions for connecting the 8-10 kVA UPS models to the power supply and load.

Internal Protective Devices

Information on internal fuses protecting the rectifier, inverter, and battery stages.

External Protective Devices

Guidelines for selecting external protection devices like fuses and magnetothermal switches.

Cable Connection Details

Specifications for cable cross-sections and stripping lengths for input and output connections.

Electrical Connections

Terminal board diagrams for connecting input and output cables for different UPS models.

Wiring Diagrams

Schematic diagrams illustrating different electrical system connection configurations for the UPS.

Battery Box Installation and Configuration

Procedures for installing battery boxes and configuring rated battery capacity via software.

Use

Initial Startup Procedure

Step-by-step guide for powering on the UPS for the first time.

Powering On;Off Operations

Procedures for switching the UPS on from mains or battery, and switching it off.

Internal Clock Setting

Instructions for setting the UPS internal clock via configuration software.

Display Panel Messages and Status

Explanation of icons, status, and messages shown on the UPS LCD display.

Measurement Display Area

How to display UPS operating information like voltage, frequency, load, and battery status.

Operating Mode Configuration

How to access and change the UPS operating mode directly from the display panel.

Additional UPS Functions

Details on Manual Bypass, Programmable Auxiliary Sockets, and External Temperature Probe.

Software Integration and Configuration

Instructions for installing and using monitoring, control, and configuration software for the UPS.

UPS Configuration Parameters

Overview of configurable parameters for adapting the UPS to specific requirements.

Communication Ports and Connectivity

Description of RS232, USB ports, and expansion slots for UPS communication.

Troubleshooting

Common Troubleshooting Issues

Table of common problems, their possible causes, and solutions for UPS operation.

Status and Alarm Codes

Detailed explanation of UPS status, user messages, anomalies, faults, and lock codes.

Technical Data

UPS Model Specifications

Detailed technical specifications for different UPS models, including input, battery, and output data.

Additional Technical Data

Other data like environmental limits, dimensions, weights, and battery box specifications.