What does error W14 mean on a Felicity inverter?

It depends on the model — 2 devices use code W14. On the IVPS3524P1G1-LV it means: Input phase abnormal. The card for each model on this page gives its exact meaning and fix.

Is error W14 a fault or a warning?

It depends on the model: on some models W14 is a fault (output cut, red LED solid), on others a warning (red LED flashing, unit keeps running). Check the card for your model on this page.

How do I clear or fix error W14?

Contact the repair center. The exact steps for each affected model are listed on this page.

W14

Felicity inverter error W14

Input phase abnormal

Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.

Severity differs by model — check your model below.

The exact meaning depends on your model:

IVPS3524P1G1-LV

InverterWarning

Also applies to:IVPS5048P1G1-LVIVPS7548P2G1IVPS10048P2G1IVPS3.5~10kVA-USIVPS3-5-10KVA

What it means

Input phase abnormal — The AC input phase is abnormal. Shown as flashing warning code 14 on the LCD (distinct from solid fault code 14, output voltage high).

Cause: The AC input phase is abnormal.

How to fix it

Contact the repair center.

Source: IVPS3524P1G1-LV IVPS5048P1G1-LV IVPS7548P2G1 IVPS10048P2G1 User Guide - EN.pdf, p.27

T-REX-50KHP3G01

InverterFault

What it means

AC lightning protection alarm — If the AC lightning protector is abnormal, check whether the lightning protector is abnormal.

Cause: The AC-side surge (lightning) protector is reporting an abnormal state — these modules commonly degrade after absorbing a surge and need to be checked.

How to fix it

Power down the inverter, wait 5 minutes for capacitors to discharge, then restart.
If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.

Source: T-REX-50KHP3G01-user-manual-.pdf, p.45

Frequently asked questions

What does error W14 mean on a Felicity inverter?: It depends on the model — 2 devices use code W14. On the IVPS3524P1G1-LV it means: Input phase abnormal. The card for each model on this page gives its exact meaning and fix.
Is error W14 a fault or a warning?: It depends on the model: on some models W14 is a fault (output cut, red LED solid), on others a warning (red LED flashing, unit keeps running). Check the card for your model on this page.
How do I clear or fix error W14?: Contact the repair center. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the IVPS3524P1G1-LV

All IVPS3524P1G1-LV codes

Other codes on the T-REX-50KHP3G01

All T-REX-50KHP3G01 codes

Prefer the full written guide? Read the complete Felicity inverter error-code guide

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