Safety: Keep the enclosure closed. Never bridge output terminals, bypass protective cutoffs or probe the internal battery/inverter. Disconnect external devices before inspecting plugs. Stop if a connector is melted, wet or physically damaged.
Applies to this exact equipment
AC180 only. Confirm the AC180 nameplate and regional AC outlet voltage; AC180P/AC180T specifications must not be substituted. The error names here are from the AC180 User Manual, §5.2.
Version check: Check AC180 versus AC180P: ratings, wiring and error-code tables may differ.
DIAGNOSE THE CAUSE · APPLY THE FIX · CONFIRM THE RESULT
Find the cause and fix it
Jump to your symptom: 01 · E087 indicates discharge temperature too high02 · E087 returns under combined loads03 · E087 recurs while cool and unloaded
01
E087 indicates discharge temperature too high
HOW TO CHECK & CORRECT THIS CAUSE
- Disconnect discharge loads and turn outputs off.
- Move AC180 out of sun and give ventilation openings free space, letting battery cool before restarting.
How to tell it is fixed: E087 clears and low-load output runs without immediate recurrence.
02
E087 returns under combined loads
HOW TO CHECK & CORRECT THIS CAUSE
- Reduce power demand, avoid stacking heat-producing devices against enclosure and operate within manufacturer's discharge temperature specifications.
How to tell it is fixed: Battery/inverter thermal protection no longer trips at safe sustained load.
03
E087 recurs while cool and unloaded
HOW TO CHECK & CORRECT THIS CAUSE
- Temperature sensor, fan or battery thermal management requires BLUETTI service, not opened battery pack repair.
How to tell it is fixed: Authorized repair passes cool unloaded and rated low-load test.
Technical reference and applicability
Source: Source manual or manufacturer model specifications ↗
Applicable sections: §3.2 discharge and warm-weather derating; §4.1 outputs; §5.2 E087
The step order and owner-level isolation sequence are editorial diagnostics based on the cited facts; they are not represented as a quoted factory repair procedure. Never assume an internal repair part is compatible without revision-specific documentation.