What does it mean when my Riello MSM 20 displays A39 or A40 and the battery replacement LED is on?
If the Riello UPS display shows one or more of the following codes: A39, A40, and the red “batteries to be replaced” LED is on, it indicates that the batteries have failed the periodic efficiency test. The batteries should be replaced by qualified personnel because they are no longer able to maintain the charge for a sufficient time.
How to fix Riello UPS not switching to standby mode?
If your Riello UPS is connected to the mains but doesn't switch to standby mode, it could be due to several reasons. First, check the connection to the input terminal, ensuring it follows the installation instructions. A missing neutral connection can also cause this issue; the UPS cannot operate without it, and its absence could cause damage. Also, check the 1/0 switch behind the door and set it to 1 (if present) and make sure that the SWIN switch located behind the door is closed. Finally, verify that mains power is available and that no upstream protection device has been triggered. If a protection device has intervened, restore it after checking for overloads or short circuits.
What does S07 mean on my Riello UPS display?
If your Riello UPS display shows the code S07, it means the batteries are discharged. The UPS is waiting until the battery voltage rises above the established threshold value. You can either wait for the batteries to recharge or manually force start up from the “START UP” menu.
Why is my Riello MSM 20 running on batteries even with mains power?
If the Riello UPS is operating off the batteries even when mains power is available, it could be due to the upstream protection device intervention. In this case, restore the protection, ensuring there is no overload or short circuit on the UPS output. Another reason could be that the input voltage is outside the accepted operating values. If this is the case, wait until the input voltage falls within the tolerance values, and the UPS will automatically switch over to mains power.
Detailed steps for initial power-up, including checks for errors and setting date/time.
Description of different operating modes like ON LINE, ECO, SMART ACTIVE, and STAND-BY OFF.
Procedure for performing maintenance without interrupting power to the load.
User-configurable parameters via the control panel, like language, output voltage, and operating mode.
Detailed view of the MCM UPS connection terminals and their functions.
Detailed view of the MSM UPS connection terminals and their functions.
Illustration and explanation of the UPS control panel elements and function keys.
Safety precautions and guidelines for handling internal UPS batteries.
Guidelines for positioning and securing the UPS and battery box during installation.
Diagrams and instructions for connecting the UPS to the electrical system.
Details on isolators and internal fuses protecting the UPS input and output lines.
Recommendations for external magnetothermal and differential protection devices.
General guidelines for connecting the UPS, emphasizing earthing and neutral connections.
Instructions for installing a remote maintenance bypass to enable UPS replacement.
Procedure for connecting the external battery box to the UPS with the power off.
Details on monitoring and configuration software for UPS management.
Guidance on identifying and resolving common UPS operational problems and distractions.
Explains UPS status, command, warning, anomaly, and fault codes for diagnostics.
Comprehensive technical specifications of the UPS models.
General| Frequency | 50/60 Hz |
|---|---|
| Battery Type | VRLA |
| Technology | On-line double conversion |
| Communication Interface | RS232, USB |
| Operating Temperature | 0-40 °C |
| Power Rating | 20 kVA / 18 kW |
| Battery Runtime | Depending on configuration (typically 10-30 minutes at full load with standard battery) |
| Topology | On-line double conversion (VFI-SS-111) |
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