Riello UPS Sentinel Dual SDU 4000 User Manual

Riello UPS Sentinel Dual SDU 4000

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Table of Contents

Questions and Answers:

C
Christian SmithAug 19, 2025
Why is the Riello UPS display not lighting up?
- H
  holmesamandaAug 19, 2025
  The display might not light up due to several reasons: * The 1/0 switch is set to 0: Set the switch to 1. * Missing connection to the input terminal: Connect the mains to the terminals following the installation instructions. * Missing neutral connection: The UPS needs a neutral connection to function. Connect the mains to the terminals as explained in the installation instructions. * The isolator is open: Close the isolator. * Mains power is missing (blackout): Ensure mains power is present, or perform a battery start-up. * Upstream protection device intervention: Restore the protection, ensuring there is no overload or short circuit on the UPS output.
A
amirandaAug 21, 2025
What to do if the Riello UPS display is on but the load is not powered?
- L
  Lisa BooneAug 21, 2025
  If the display is on but the load isn't powered, it could be due to: * The UPS being in stand-by mode: Press the “ON” button on the front panel to power the loads. * The stand-by off mode being selected: Change the mode, as STAND-BY OFF mode only powers loads during blackouts. * No connection to the load: Check the connection to the load. * UPS malfunction and automatic bypass out of use: Insert the maintenance bypass (SWMB).
J
John AndersonAug 25, 2025
Why does my Riello UPS operate off batteries when mains power is present?
- T
  Teresa BurtonAug 25, 2025
  The UPS might be running on batteries despite mains power being available due to: * Intervention of the upstream protection device: Restore the protection, ensuring there is no overload or short circuit on the UPS output. * The input voltage being outside the allowed operating values: Wait for the input mains voltage to return within the tolerance limits, and the UPS will automatically return to mains operation.
L
lburtonAug 26, 2025
What does it mean when my Riello UPS buzzer sounds continuously and shows codes F03, F05, F07, F13, F21, F40, F41, F42, or F43?
- D
  Daniel HuffAug 26, 2025
  This indicates the UPS is malfunctioning and may lock soon. If possible, disconnect the power to the load, switch the UPS off and back on again.
M
Mark HillAug 28, 2025
What does it mean when my Riello UPS buzzer sounds continuously and shows codes F60, L03, L05, L07, L13, L20, L21, L40, L41, L42, or L43?
- L
  Lauren ChanAug 28, 2025
  This indicates that the UPS is malfunctioning. If possible, disconnect the power to the load, switch the UPS off and back on again.
J
jacksonpatriciaAug 30, 2025
What does it mean when my Riello UPS buzzer sounds continuously and the display shows codes A54, F50, F51, F52, F55, L50, L51, L52?
- X
  xwagnerAug 30, 2025
  The buzzer sounds and these codes appear when the load applied to the UPS is too high. Reduce the load to within the threshold of 100% (or the user threshold in the case of code A54). If the display shows a lock: remove the load and switch the UPS off and back on again.
K
Kevin PotterSep 1, 2025
Why does the Riello UPS buzzer sound continuously and show codes F04 or L04?
- M
  Mary RussellSep 1, 2025
  The buzzer sounds and these codes appear when the temperature of the dissipators inside the UPS is too high. Ensure the environment's temperature does not exceed 40°C.
D
Dawn RyanSep 3, 2025
What does it mean when my Riello UPS buzzer sounds continuously and the display shows codes F53, L53?
- F
  Francisco Brown IISep 3, 2025
  The continuous buzzer and these codes indicate a fault on one or more of the utilities powered by the UPS. Disconnect all the utilities, switch the UPS off and back on again, and then reconnect the utilities one at a time to identify the faulty one.
V
Victor VaughnSep 5, 2025
Why is the buzzer sounding continuously and the display showing code L45 on my Riello UPS?
- M
  Martha GarciaSep 5, 2025
  Code L45 indicates an abnormal output voltage. If possible, disconnect the power to the load, switch the UPS off and back on again. If the problem disappears, check the features of the load.
V
vickiparksSep 7, 2025
What to do if the Riello UPS does not turn on and displays codes A06 or A08?
- M
  Mark BoyerSep 7, 2025
  If the UPS doesn't turn on and shows codes A06 or A08, the temperature of the UPS might be lower than 0°C. Check the temperature of the environment; if it is too low, bring it past the minimum threshold (0°C).

Riello UPS Sentinel Dual SDU 4000 Specifications

General

Brand	Riello UPS
Model	Sentinel Dual SDU 4000
Category	UPS
Language	English

Summary

INSTALLATION

TOWER VERSION

Tower Installation Steps

Details the steps for setting up the UPS in a tower configuration.

TOWER VERSION WITH BATTERY BOX

Tower Installation with Battery Box

Guides the installation of the UPS and battery box in a tower setup.

RACK VERSION

Rack Installation Method

POWER CONNECTION

Power Connection Guidelines

Instructions and safety precautions for connecting the UPS to power.

Internal Protective Devices

EXTERNAL PROTECTION AND CABLES

External Protective Devices

BATTERY BOX INSTALLATION

Battery Box Installation Steps

Configuring Battery Capacity

UPS OPERATION AND USE

First Time Connection and Startup

Steps for initial power-up and connection of loads.

Switching UPS On and Off

Procedures for starting and stopping the UPS from mains or battery.

DISPLAY PANEL MESSAGES

UPS Status Messages

OPERATING MODE CONFIGURATION

Possible Operating Modes

Additional Functions

BATTERY PACK REPLACEMENT

Battery Pack Replacement Procedure

Step-by-step guide for replacing the UPS battery pack.

SOFTWARE AND CONFIGURATION

Monitoring and Control Software

UPS Configuration Settings

Details the various configurable functions and parameters of the UPS.

COMMUNICATION PORTS

RS232 Connector Pinout

TROUBLESHOOTING

Common Problems and Solutions

A guide to diagnosing and resolving common UPS issues.

ALARM CODES

Fault and Alarm Codes

Explains different alarm codes (Anomalies, Allarmi, Active commands) generated by the UPS.

LOCK CODES

UPS Lock Code Reference

Details the lock codes indicating critical UPS faults.

TECHNICAL DATA

Input and Output Specifications

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