Poor cooling effect
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.
Poor cooling effect
Cause: Insufficient refrigerant; insufficient water flow; serious dust accumulation in condenser; refrigeration system clogged.
Replenish refrigerant; clean water filter and check water pump; clean condenser; check or replace filter drier.
Source: fls-es232lc-g-2-fls-es232lc-s-user-guide-en.pdf
HVAC-COOL-POOR means: Poor cooling effect. Insufficient refrigerant; insufficient water flow; serious dust accumulation in condenser; refrigeration system clogged.
HVAC-COOL-POOR is a fault code: the ESS unit enters protection and stops normal operation until it is cleared.
Replenish refrigerant; clean water filter and check water pump; clean condenser; check or replace filter drier.
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.