Engineering guide
Galaxy VL alarm levels, mimic diagram and logs
The Galaxy VL tells you how serious an alarm is before you read it: the alarm status symbol turns blue for informational, yellow for a warning and red for a critical alarm, and any module framed in red on the mimic diagram is inoperable or in alarm. Open the active alarms log, record the message, and call a technician for red alarms or red modules.
Key facts
- Blue symbol: Informational alarm present
- Yellow symbol: Warning alarm present
- Red symbol: Critical alarm present
- Red frame on mimic: Module inoperable or in alarm
- Event log depth: Latest 100 events
- Display tolerance: ±1% voltage, ±3% power and current
The alarm status symbol
The symbol in the top right corner of the display follows the worst active alarm: green for none, blue for informational, yellow for warning, red for critical. Tapping it opens the active alarms log. On a Galaxy VL this is the fastest triage step: blue can usually wait for the next maintenance visit, yellow needs a look the same day, and red needs a technician.
Red modules on the mimic diagram
The mimic diagram frames active modules (rectifier, inverter, battery, static bypass switch) in green and inactive ones in black. A module framed in red is inoperable or in an alarm condition. Combine the two views: the alarms log tells you what, the mimic tells you where in the power path. If the display fails, the manual notes that the operation mode can still be read on status LEDs behind the front panel, which is a job for qualified staff.
Logs and the UPS report
The Logs screen holds the latest 100 events, newest first. For a fault investigation, the manual describes exporting a UPS report from Maintenance > UPS report to a USB device; on the VL the USB port is on the system level controller behind the front door, so let the technician pull it. Keep the event list photographed until then, because a log can be cleared from the same screen.
Readings on the status screens are not lab-grade: the manual asks for a tolerance of ±1% on voltages and ±3% on power and currents when comparing the display with a power analyzer.
Reminders that are not faults
Some informational items are maintenance reminders rather than faults, for example the air filter reminder, which is reset once the filter has been replaced. Batteries are the other planned item: a VL battery plant ages whatever the display says, and replacement batteries for Schneider three-phase systems are easier to source before a string fails than after.
When to call for service
- Any red (critical) alarm or red module.
- A yellow alarm that returns after it clears.
- The UPS on static bypass or on battery with normal utility present.
- Any change you did not request, such as a module going inactive.
For planned work on a modular VL, Schneider Galaxy maintenance visits cover modules, fans, filters and batteries; the modular vs monolithic guide explains what changes for service on a modular frame.
Related pages
Common questions
What does a blue alarm symbol mean on a Galaxy VL?
At least one informational alarm is present, often a reminder such as the air filter. Open the active alarms log to read it.
What does a red frame around a module mean?
The manual says that module is inoperable or in an alarm condition. Note which module it is and call for service.
How many events does the Galaxy VL log keep?
The Logs screen shows the latest 100 events, with the newest at the top.
Why do the display readings differ from my power analyzer?
The manual gives a tolerance of ±1% on voltages and ±3% on power and currents for the display values.
Can I export the UPS report myself?
The manual describes the export, but the USB port sits on the system level controller behind the front door, so leave it to the technician.
Sources, checked October 4, 2026:
- Schneider Electric, Galaxy VL UPS Operation, 990-91379H (3/2026), pp. 13, 44, 54, 55, 73, 74
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