- Solar and energy
- UPS (uninterruptible power supply)
Overload
Eaton UPS Overload: backup outlets exceeding rated load
Risk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
High
Quick answer
An Overload message on the LCD (or a flashing green button with a beep every 3 seconds on Ellipse PRO, continuous alarm on 3S, or alternating green/red LED on 5E) warns that connected equipment exceeds your Eaton UPS capacity.
Safety first
Stop and check this first
- Do not plug heating appliances, household equipment, or laser printers into battery backup outlets: an overload above 120 % on Eaton 5E forces the UPS into fault mode within 1 second and cuts backup protection.
Safe checks you can perform
- Disconnect excess or non-critical equipment from the battery backup outlets
- Check and reset the external circuit breaker if the UPS stays on battery
- Review the Overload prealarm setting and percent load on Eaton 5P
Leave these tasks to a qualified professional
- Do not attempt this professional task: Load measurement and outlet allocation across backup and surge banks
- Do not attempt this professional task: Faulty load isolation or Eaton service evaluation
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Load measurement and outlet allocation across backup and surge banks
What they doA technician measures the active watt and VA draw of each connected device, moves non-critical peripherals off the battery backup receptacles, and configures Group 1 and Group 2 load segments on Eaton 5P if load shedding is needed.
They must show youthe final percent load reading on the LCD below the alarm threshold and the separation of critical and non-critical cords.
In writingmeasured load in watts/VA, outlet bank assignment, and configured Overload prealarm threshold.
Faulty load isolation or Eaton service evaluation
What they doIf the alternating green/red LED on an Eaton 5E or the Overload status on an Eaton 5P persists after non-critical loads are unplugged, service personnel test for a failed downstream power supply or an internal UPS fault.
They must show youverification of normal no-load UPS operation or identification of the faulty external device that caused the overload.
In writingno-load test result, circuit breaker status, and Eaton service or RMA reference if hardware repair is required.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Disconnect excess or non-critical equipment from the battery backup outlets
- Who:
- you, checking the power cords plugged into your Eaton UPS outlets.
- How:
- unplug non-essential peripherals (such as printers, scanners, or fax machines) from the battery backup outlets immediately and move them, if appropriate, to the surge-protection-only outlets.
- Result that matters:
- bring total power draw below the overload threshold so the alarm resets when the condition becomes inactive.
- If the Overload message clears and the green indicator stays solid without beeping:
- the UPS will continue supplying the remaining critical equipment.
- If AC power is available at the wall but the UPS still runs on battery power:
- inspect the resettable circuit breaker next.
- Evidence to keep:
- which devices were unplugged and the load level shown on the LCD screen afterward.
Evidence: Manual de instalacion y uso Eaton 3S 550/700 (614-09954-03) · Advanced User Guide Eaton 5E UPS (DSD-5E2206) · Eaton 5P UPS installation and user manual (620-00082-01) · Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
Check and reset the external circuit breaker if the UPS stays on battery
- Who:
- you, inspecting the resettable circuit breaker button on the exterior of the UPS.
- How:
- if utility AC is present but your Eaton 3S or Ellipse PRO operates on battery after an overload, check whether the circuit breaker button (under the UPS on 3S or on the rear panel on Ellipse PRO) protrudes; after disconnecting excess equipment, press the button in once to reset it.
- Result that matters:
- restore utility input and filtered outlet power without draining the battery.
- If the breaker resets and the UPS returns to solid green normal operation:
- keep total connected load within the rated amperage and wattage.
- If the breaker trips again or the alarm continues with minimal load attached:
- check whether one of the connected devices has failed.
- Evidence to keep:
- circuit breaker button position before and after reducing the connected equipment.
Evidence: Eaton 3S UPS user guide (614-09953-00) · Manual de instalacion y uso Eaton 3S 550/700 (614-09954-03) · Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
Review the Overload prealarm setting and percent load on Eaton 5P
- Who:
- you, using the front panel LCD menu on Eaton 5P models.
- How:
- open In/Out settings to check the Overload prealarm threshold (adjustable from 10 % to 105 %, default 105 %) and compare it against the displayed percent load; if the alarm remains active with all loads removed, note the serial number for Eaton support.
- Result that matters:
- verify whether the alert was triggered by a custom prealarm percentage or an actual load above 105 % of nominal.
- If the prealarm threshold was set below your normal operating load:
- restore it to the appropriate percentage for your installation.
- If the overload alarm persists with no equipment plugged into the output:
- contact your Eaton service representative.
- Evidence to keep:
- displayed percent load, Overload prealarm setting, and the UPS serial number.
Evidence: Advanced User Guide Eaton 5E UPS (DSD-5E2206) · Eaton 5P UPS installation and user manual (620-00082-01)
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Solar and energy
- Brand
- Eaton
- Product type
- UPS (uninterruptible power supply)
Known code variants
- El botón verde 6 parpadea y la alarma emite un pitido audible cada tres segundos
- El interruptor verde 8 parpadea frecuentemente y la alarma suena de manera continuada
- Green button 6 flashes and audible alarm beeps every 3 seconds
- Green button 8 flashes frequently and audio alarm continuous
- Overload
- OVL
- Sobrecarga en las tomas auxiliares
- zappi error 30 sobrecarga
- zappi fault code 30
- zappi Overload
- zappi overload error
What it means
Across Eaton 5P (LCD status Overload when power requirements exceed 105 % of nominal capacity), Eaton 5E (code OVL or green/red LED flashing alternately every 0.5 seconds with a beep every 1.5 seconds), Eaton Ellipse PRO (green button 6 flashing with a beep every 3 seconds), and Eaton 3S (green button flashing with a continuous audio alarm), this warning means equipment plugged into the battery backup outlets is drawing more power than the unit is rated to supply. An output overload can also trip the rear or bottom resettable circuit breaker, forcing the UPS onto battery power even when utility AC is present. This alarm alone never proves an internal component has failed.
Warnings and stop conditions
- Mediumsource verified
Do not plug heating appliances, household equipment, or laser printers into battery backup outlets: an overload above 120 % on Eaton 5E forces the UPS into fault mode within 1 second and cuts backup protection.
Evidence: Advanced User Guide Eaton 5E UPS (DSD-5E2206) · Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
Symptoms and causes
Probable causes · in order
- Connected equipment exceeds the rated VA or watt capacityCommon
Devices plugged into the battery-backed outlets draw more than 100 % on Eaton 5E (which transfers to fault mode after 5 minutes at 110 %-120 % or in 1 second above 120 %) or more than 105 % of nominal on Eaton 5P.
Evidence: Manual de instalacion y uso Eaton 3S 550/700 (614-09954-03) · Advanced User Guide Eaton 5E UPS (DSD-5E2206) · Eaton 5P UPS installation and user manual (620-00082-01) · Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
- Non-essential peripherals plugged into battery backup outletsCommon
On Eaton Ellipse PRO and Eaton 3S units, plugging printers, scanners, or fax machines into the battery backup outlets instead of the surge-protection-only outlets overloads the backed-up output bank.
Evidence: Eaton 3S UPS user guide (614-09953-00) · Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
- Tripped output circuit breaker or a failed connected loadPossible
An output overload can trip the resettable circuit breaker (at the rear on Ellipse PRO or underneath on Eaton 3S), or a failed downstream device can draw abnormal current that triggers the alarm.
Evidence: Manual de instalacion y uso Eaton 3S 550/700 (614-09954-03) · Advanced User Guide Eaton 5E UPS (DSD-5E2206) · Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
Virtual technician
Does Overload still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Eaton 3S UPS user guide (614-09953-00)
Eaton · 2019 · official_doc
- 2
Manual de instalacion y uso Eaton 3S 550/700 (614-09954-03)
Eaton · 2019 · official_doc
- 3
Advanced User Guide Eaton 5E UPS (DSD-5E2206)
Eaton · 2025 · official_doc
- 4
Eaton 5P UPS installation and user manual (620-00082-01)
Eaton · 2024 · official_doc
- 5
Manual de instalacion y uso Eaton Ellipse PRO 650/850/1200/1600 (614-06817-03)
Eaton · 2025 · official_doc
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