What is the W16 error on Felicity?

W16 on a Felicity unit means: Clock Warn.. It can appear on 4 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.

Can I clear the W16 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 W16 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.

Fault

W16

Clock Warn.

4 Devices that report this code

What does the W16 error code mean?

W16 on a Felicity unit indicates: Clock Warn.. It is a fault-severity event that can appear on 4 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 fault-severity code

Fault codes stop normal operation but the unit may attempt to recover. Common causes are out-of-range conditions (voltage, current, temperature) that require checking inputs and outputs before restart.

What triggers this code

W16 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.

E-CHO-SI3KS2Inverter↗ view on device

W16Clock Warn.Fault

Description

Internal clock/RTC warning, button battery low.

Source:E-CHO-SI3KS2-Operation-Manual.pdf · page 17

E-CHO-SI5KS2Inverter↗ view on device

W16Clock Warn.Fault

Source:E-CHO-SI5KS2-Operation-Manual.pdf

E-CHO-SI8KS2Inverter↗ view on device

W16Clock Warn.Fault

Source:E-CHO-SI8KS2-Operation-Manual.pdf

T-REX-50KHP3G01Inverter↗ view on device

W16Ambient overtemperature derating alarm.Fault

Description

The ambient temperature is too high, and the inverter reduces the power.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 45

Frequently asked about W16

What is the W16 error on Felicity?: W16 on a Felicity unit means: Clock Warn.. It can appear on 4 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the W16 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 W16 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.