Can I clear the W05 code myself?

It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.

Is the W05 fix the same on every device?

The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.

Where does this information come from?

Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Warning

W05

Three-phase input missing phase.

2 Devices that report this code

What does the W05 error code mean?

W05 on a Felicity unit indicates: Three-phase input missing phase.. It is a warning-severity event that can appear on 2 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a warning-level code

Warning codes do not stop the unit. They flag a condition that should be addressed before it escalates — usually a near-threshold reading or a configuration check.

What triggers this code

W05 is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

IVEM8048-IIInverter↗ view on device

W05Three-phase input missing phase.Warning

Description

Warning: Three-phase input missing phase. Fault LED flashing.

Cause

Three-phase mains input is not normal (missing phase).

Recommended fix

Check whether the three-phase mains input is normal.

Source:IVEM8K-12K-II_compressed.pdf · page 42

T-REX-50KHP3G01Inverter↗ view on device

W05Battery 1 SOC low alarm.Fault

Description

Battery 1 SOC is too low, the battery should be charged.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 44

Frequently asked about W05

What is the W05 error on Felicity?: W05 on a Felicity unit means: Three-phase input missing phase.. It can appear on 2 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the W05 code myself?: It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the W05 fix the same on every device?: The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?: Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.