ReadonlyDeviceReadonlyEffectiveReadonlyError8000 while the unit reports no fault; the unit's own code otherwise
(live-probed 2026-11-07 on the three device types).
ReadonlyErrorThe fault as MELCloud words it in the account's language, '' while
there is none.
ReadonlyHasReadonlyHasReadonlyHastrue while the unit itself reports a fault — an E6 indoor/outdoor
communication error, for instance.
ReadonlyHasReadonlyLastReadonlyNumberReadonlyOfflineReadonlyOutdoorReadonlyPM25ReadonlyPowerReadonlyRoomReadonlyRoomReadonlySetReadonlyVentilationReadonlyWifi
Wire-format
Devicepayload for an ERV (energy-recovery ventilation) unit inListDevices.