Ferroli
The Ferroli OMNIA HYBRID C is an 8 kW hybrid split heat pump and condensing boiler system with an A+++ ErP rating, using R410A refrigerant and supporting OpenTherm controls.
The Ferroli OMNIA HYBRID C is a split-system hybrid heat pump designed for space heating and instantaneous domestic hot water production. Integrating an air-source heat pump with a condensing gas boiler, it offers nominal capacities of 4.1 kW, 6.1 kW, or 8 kW. Using R410A refrigerant, the system achieves an ErP rating of A+++ at 35°C flow temperatures. This technical guide provides engineers with essential specifications, fault code diagnostics, and installation requirements for the OMNIA HYBRID C range.
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Full technical specifications extracted from the manufacturer brochure. Empty sections are hidden.
The Ferroli OMNIA HYBRID C represents a dual-fuel approach to domestic heating, combining a DC inverter air-source heat pump with a high-efficiency condensing boiler. This split system consists of an outdoor unit (OMNIA-UE) and a compact indoor unit (OMNIA-UI HYBRID C 08) measuring 700mm high by 440mm wide. The hybrid configuration is specifically engineered to manage space heating loads while providing instantaneous domestic hot water, bypassing the need for a separate unvented cylinder in many retrofit scenarios.
Available in three power variants—the 04E (4.1 kW), 06E (6.1 kW), and 08E (8 kW)—the system utilizes R410A refrigerant with a charge of 2.5 kg. Performance is optimized through weather compensation and a high COP of 5.0 at A7W35 conditions. The heat pump component can deliver flow temperatures up to 60°C and operates in outdoor temperatures as low as -20°C. For the 8 kW model, the outdoor unit has a sound power level of 62 dB(A), which requires careful siting to meet MCS-020 planning standards, though a quiet mode is available to reduce operational noise.
Hydraulic integration is simplified by the indoor unit's design, which operates at a maximum pressure of 3 bar. The system is compatible with OpenTherm and Modbus protocols, allowing for sophisticated control strategies. Engineers should note the electrical requirements, typically requiring a 16A MCB for a single-phase 230V supply. The unit features a reverse cycle defrost method to maintain efficiency during low ambient conditions.
Maintenance and diagnostics are facilitated by a comprehensive fault code system displayed on the wired remote controller. Common issues include E0 for flow switch errors, often linked to low water flow rates, and E8 for general water flow failure. Boiler-specific faults, such as A01 (no burner ignition), indicate issues with gas supply or electrode positioning. Annual servicing is mandatory, involving a visual inspection, hydraulic circuit check, and cleaning of the condensing system and fans. F-Gas certification is required for any work involving the refrigerant circuit due to the split-system design and the use of R410A.
Every fault code listed in the manufacturer brochure, with likely causes and engineer actions. Each code has a permalink — paste a URL like https://www.boilertag.com/heat-pumps/ferroli/omnia-hy-06e-28c#fault-e0 to jump straight to the entry.
| Code | Meaning | Details |
|---|---|---|
| E0Lockout | Flow switch error Show causes & actionsFlow switch error displayed 3 times. Likely causes
User action Contact technical assistance. Engineer action Reconnect wire correctly; check water flow rate; change water flow switch. Reset procedure Turn unit OFF and back ON. | Details |
| E2Lockout | Communication error Show causes & actionsCommunication error between wired controller and unit. Likely causes
User action Contact technical assistance. Engineer action Connect wire; reconnect in right sequence; add barrier to protect unit. Reset procedure Turn unit OFF and back ON. | Details |
| E8Lockout | Water flow failure Show causes & actionsFailure in water flow detection. Likely causes
User action Check water pressure on manometer. Engineer action Clean water filter; purge air; check expansion vessel; check pump speed setting. Reset procedure Turn unit OFF and back ON. | Details |
| A01Lockout | No burner ignition Show causes & actionsBoiler failed to ignite burner. Likely causes
User action Check gas supply. Engineer action Check gas flow; check electrode wiring and position; check gas valve; clean trap. Reset procedure Press RESET button. | Details |
| F37 | Incorrect system water pressure Show causes & actionsSystem water pressure is too low. Likely causes
User action Restore system pressure using filling knob. Engineer action Check water pressure switch. Reset procedure Automatic reset once pressure is restored. | Details |
Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.
User: Contact technical assistance.
Engineer: Reconnect wire correctly; check water flow rate; change water flow switch.
Triggered by fault code E0.
User: Contact technical assistance.
Engineer: Connect wire; reconnect in right sequence; add barrier to protect unit.
Triggered by fault code E2.
User: Check water pressure on manometer.
Engineer: Clean water filter; purge air; check expansion vessel; check pump speed setting.
Triggered by fault code E8.
Common questions from engineers and homeowners about the Ferroli OMNIA HY 06E 28C.
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Specifications on this page are extracted from the manufacturer brochure. Always cross-check against the latest datasheet before commissioning or quoting. Last updated 30 April 2026.
User: Check gas supply.
Engineer: Check gas flow; check electrode wiring and position; check gas valve; clean trap.
Triggered by fault code A01.
User: Restore system pressure using filling knob.
Engineer: Check water pressure switch.
Triggered by fault code F37.