Is error HVAC-HEAT-NOWORK a fault or a warning?

HVAC-HEAT-NOWORK is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.

HVAC-HEAT-NOWORK

Felicity ESS error HVAC-HEAT-NOWORK

Electric heating tube does not work

Fault — the ESS unit enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.

FLS-ES232LC-S

Energy storage systemFault

What it means

Electric heating tube does not work

Cause: Water temperature set too low (no heating required), loose circuit connection, or electric heating tube burnout.

How to fix it

Check outlet temperature and heating set point; tighten circuit connector; replace burnt-out heating tube.

Source: FLS-ES232LC-S.pdf

Frequently asked questions

What does error HVAC-HEAT-NOWORK mean on a Felicity ESS?: HVAC-HEAT-NOWORK means: Electric heating tube does not work. Water temperature set too low (no heating required), loose circuit connection, or electric heating tube burnout.
Is error HVAC-HEAT-NOWORK a fault or a warning?: HVAC-HEAT-NOWORK is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
How do I clear or fix error HVAC-HEAT-NOWORK?: Check outlet temperature and heating set point; tighten circuit connector; replace burnt-out heating tube.

Related error codes

Other codes on the FLS-ES232LC-S

All FLS-ES232LC-S 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.