How do I register a Ferroli OMNIA H with BoilerTag?

To register a Ferroli OMNIA H heat pump with BoilerTag, scan the unique QR code found on the BoilerTag sticker after completing the installation. The system will pre-fill the model details from our appliance catalogue, requiring you to confirm them. You then record the installation date and your Gas Safe registration number. This process creates a permanent, publicly viewable service log for the appliance, enhancing transparency and accountability for future maintenance. The first 12 BoilerTag stickers are provided free of charge to registered engineers. Order free BoilerTag stickers from the engineer dashboard.

What is the Ferroli OMNIA H?

The Ferroli OMNIA H is a split air-source heat pump range, offering heating capacities from 4.1 kW to 15.5 kW, with an ErP A++ rating for both 35°C and 55°C applications. It is designed for domestic heating and hot water in the UK, suitable for new builds and retrofits where a split system is preferred.

What refrigerant does the Ferroli OMNIA H heat pump use?

The Ferroli OMNIA H series utilises R410A refrigerant. While R410A has been a common refrigerant in heat pump technology, newer refrigerants like R32 or R290 (propane) are becoming more prevalent due to their lower Global Warming Potential (GWP). R410A is still widely used and compliant, but future regulations may favour lower GWP alternatives.

Does the Ferroli OMNIA H heat pump have a quiet mode?

Yes, the Ferroli OMNIA H heat pump is equipped with a quiet mode function. This feature allows the unit to operate at a reduced noise level, which can be beneficial in residential areas or where noise emissions are a particular concern. While specific decibel levels for quiet mode are not provided, its inclusion indicates a design consideration for acoustic performance.

What heating capacities are available in the Ferroli OMNIA H range?

The Ferroli OMNIA H heat pump range offers a variety of heating capacities to suit different property sizes and heat loss requirements. Models are available from 4.1 kW, such as the OMNIA H 04E, up to 15.5 kW, including the OMNIA H 16E. This broad selection allows for precise sizing to match the specific demands of a UK domestic heating system, ensuring optimal efficiency and comfort.

What does fault code E8 mean on a Ferroli OMNIA H heat pump?

Fault code E8 on the Ferroli OMNIA H heat pump indicates a water flow failure. This can be caused by several issues, including closed shut-off valves, a dirty water filter, air in the system, insufficient water pressure (below 1 bar), or an incorrectly set pump speed. It may also point to a broken expansion vessel or excessive resistance in the water circuit. During defrost, it could relate to backup heater wiring or blown fuses.

Where can I download the Ferroli OMNIA H installation manual?

The installation and user manual for the Ferroli OMNIA H heat pump, titled 'OMNIA_H_Installation_User_Manual_EN', is typically available for download from the official Ferroli UK website or through accredited distributors. This document provides comprehensive details on installation procedures, technical specifications, wiring diagrams, and troubleshooting guides, essential for both heating engineers and homeowners.

What control options are available for the Ferroli OMNIA H heat pump?

The Ferroli OMNIA H heat pump is compatible with a wired remote controller for direct user interface. It also features integrated weather compensation, which adjusts the heat pump's output based on outdoor temperatures for optimised efficiency. Additionally, Modbus compatibility is included, allowing for integration into more complex building management systems for enhanced control and monitoring capabilities.

What is the recommended service interval for the Ferroli OMNIA H?

A service interval of six months is recommended for the Ferroli OMNIA H heat pump to ensure its continued efficient and reliable operation. Regular maintenance should include visual inspections, checks of the hydraulic and electrical circuits, cleaning of heat exchangers and filters, and verification of water pumps. F-gas certified technicians are required for refrigerant leak checks as per regulatory requirements.

What does fault code E0 mean on the Ferroli OMNIA HI3 08E?

Flow switch error(E8 displayed 3 times) Likely causes: 1. The wire circuit is short connected or open.; 2. Water flow rate is too low.; 3. Water flow switch is failed, switch is open or close continuously, change the water flow switch.. Reconnect the wire correctly. change the water flow switch.

What does fault code E1 mean on the Ferroli OMNIA HI3 08E?

Phase sequence fault (only for three-phase unit) Likely causes: 1.Check the power supply cables should be connected stable, to avoid phase loss.; 2.Check the power supply cables sequence, change any two cables sequence of the three power supply cables.. change any two cables sequence of the three p…

What does fault code E2 mean on the Ferroli OMNIA HI3 08E?

Communication error between wired controller and unit Likely causes: 1.wire doesn't connect between wired controller and unit.; 2.Communication wire sequence is not right.; 3. Whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc... Connect the…

What does fault code E3 mean on the Ferroli OMNIA HI3 08E?

The backup heater exchanger outlet water temperature sensor (T1) error Likely causes: 1. The T1 sensor connector is loosen.; 2. The T1 sensor connector is wet or there is water in.; 3. The T1 sensor failure, change a new sensor.. Reconnect it. Remove the water, make the connector dry. Add waterproo…

What does fault code E4 mean on the Ferroli OMNIA HI3 08E?

The domestic hot water temperature sensor (T5) error Likely causes: 1. The T5 sensor connector is loosen.; 2. The T5 sensor connector is wet or there is water in.; 3. The T5 sensor failure, change a new sensor.. Reconnect it. Remove the water, make the connector dry. Add waterproof adhesive. change…

What does fault code E5 mean on the Ferroli OMNIA HI3 08E?

The condenser outlet refrigerant temperature sensor (T3) error. Likely causes: 1. The T3 sensor connector is loosen.; 2. The T3 sensor connector is wet or there is water in.; 3. The T3 sensor failure, change a new sensor.. Reconnect it. Remove the water, make the connector dry. Add waterproof adhes…

What does fault code E6 mean on the Ferroli OMNIA HI3 08E?

The outdoor air temperature sensor (T4) error. Likely causes: 1. The T4 sensor connector is loosen.; 2. The T4 sensor connector is wet or there is water in.; 3. The T4 sensor failure, change a new sensor.. Reconnect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new…

What does fault code E8 mean on the Ferroli OMNIA HI3 08E?

Water flow failure Likely causes: Check that all shut off valves of the water circuit are completely open.; Check if the water filter needs cleaning.; Refer to "9.4 Charging water"; Make sure there is no air in the system (purge air).; Check on the manometer that there is sufficient water pressure.…

What does fault code E9 mean on the Ferroli OMNIA HI3 08E?

Suction pipe sensor (Th) error Likely causes: 1. The Th sensor connector is loosen.; 2. The Th sensor connector is wet or there is water in.; 3. The Th sensor failure, change a new sensor.. Re connect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor.

What does fault code EA mean on the Ferroli OMNIA HI3 08E?

Probe error Tp (compressor discharge) Likely causes: 1. The Th sensor connector is loosen.; 2. The Th sensor connector is wet or there is water in.; 3. The Th sensor failure, change a new sensor.. Re connect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor.

What does fault code ED mean on the Ferroli OMNIA HI3 08E?

Tw_in probe error (evaporator water inlet) Likely causes: 1. Check the electrical connection (reset if incorrect).; 2. The probe is faulty, replace the probe.; 3. Replace the hydronic module control board.. Replace the probe. Replace the hydronic module control board.

What does fault code EE mean on the Ferroli OMNIA HI3 08E?

Eprom error hydronic module control board Likely causes: 1. Replace the faulty card.. Replace the faulty card.

What does fault code H0 mean on the Ferroli OMNIA HI3 08E?

Communication error between PCB board and idronic control board Likely causes: 1.wire doesn't connect between indoor unit and outdoor unit.; 2.Communication wire sequence is not right.; 3. Whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc..…

What does fault code H1 mean on the Ferroli OMNIA HI3 08E?

Communication error between PCB A and PCB B Likely causes: 1. Whether there is power connected to the PCB and driven board. Check the PCB indicator light is on or off. If Light is off, reconnect the power supply wire.; 2.if light is on, check the wire connection between the main PCB and driven PCB,…

What does fault code H2 mean on the Ferroli OMNIA HI3 08E?

The plate heat exchanger refrigerant inlet (liquid pipe) temperature sensor(T2) error. Likely causes: 1.The T2 sensor connector is loosen.; 2.The T2 sensor connector is wet or there is water in.; 3. The T2 sensor failure, change a new sensor.. Re connect it. Remove the water, make the connector dry…

What does fault code H3 mean on the Ferroli OMNIA HI3 08E?

The plate heat exchanger refrigerant outlet (gas pipe) temperature sensor (T2B) error. Likely causes: 1. The T2B sensor connector is loosen.; 2.The T2B sensor connector is wet or there is water in.; 3. The T2B sensor failure, change a new sensor.. Re connect it. Remove the water, make the connector…

What does fault code H4 mean on the Ferroli OMNIA HI3 08E?

Three times P6 protect Likely causes: Same to P6.

What does fault code H5 mean on the Ferroli OMNIA HI3 08E?

The indoor temperature sensor(Ta) error Likely causes: 1. The Ta senor is in the interface;; 2. The Ta sensor failure change a new sensor or change a new interface.. change a new sensor or change a new interface.

What does fault code H6 mean on the Ferroli OMNIA HI3 08E?

The DC fan failure Likely causes: 1. Strong wind or typhoon below toward to the fan, to make the fan running in the opposite direction.; 2.fan motor is broken, change a new fan motor.. Change the unit direction or make shelter to avoid typhoon below to the fan. change a new fan motor.

What does fault code H7 mean on the Ferroli OMNIA HI3 08E?

Main supply voltage circuit voltage out of limits Likely causes: 1. Whether the power supply input is in the available range.; 2. Power off and power on for several times rapidly in short time. Remain the unit power off for more than 3 minutes than power on.; 3. the circuit defect part of Main cont…

What does fault code H8 mean on the Ferroli OMNIA HI3 08E?

Pressure sensor failure Pe Likely causes: 1. Pressure sensor connector is loosen, reconnect it.; 2. Pressure sensor failure. change a new sensor.. reconnect it. change a new sensor.

Ferroli OMNIA H Heat Pump – Specs, Fault Codes & Service

Engineer's overview

The Ferroli OMNIA H series comprises air-source split heat pumps manufactured in Italy, offering a versatile solution for UK domestic heating. These DC inverter units are available in a range of heating capacities, from the 4.1 kW OMNIA H 04E to the 15.5 kW OMNIA H 16E and OMNIA HI6 16TE models, including both single-phase and three-phase options with integrated electrical boosters. All models in the OMNIA H family utilise R410A refrigerant.

The system is designed to operate effectively in varying UK climates, capable of delivering a maximum flow temperature of 60°C and maintaining operation down to an outdoor ambient temperature of -20°C. This ensures consistent performance even during colder periods. The OMNIA H series achieves an ErP rating of A++ for both 35°C and 55°C applications, indicating high energy efficiency across different system designs.

Installation considerations include minimum clearances of 300mm to the sides and 600mm to the front of the outdoor unit, allowing for adequate airflow and service access. The indoor unit is compact, measuring 700mm in height, 420mm in width, and 320mm in depth, facilitating integration into utility spaces. The hydraulic circuit can handle a maximum operating pressure of 41.5 bar, ensuring robustness within typical system parameters.

Control capabilities include a wired remote controller and integrated weather compensation, optimising system performance based on external conditions. Modbus compatibility is also featured, allowing for integration with broader building management systems. The unit also features a quiet mode for reduced noise operation, enhancing homeowner comfort.

For routine maintenance, a service interval of six months is recommended. Annual service steps are comprehensive, covering a visual inspection of the unit for rust and panel integrity, inspection of the hydraulic circuit for leaks and filter cleanliness, and a thorough check of the electrical system for cable damage. Crucially, the ventilated condensing/evaporating section requires cleaning to ensure optimal airflow, and the water heat exchangers must be inspected for efficiency. The water filter and pumps also require attention. F-gas certification is required for refrigerant leak checks as per regulations.

Should operational issues arise, the OMNIA H system provides a range of fault codes for diagnostics. For example, an "E8" code indicates a water flow failure, prompting checks on shut-off valves, filters, air in the system, water pressure (above 1 bar), pump speed, and expansion vessel integrity. Sensor errors, such as "E3" for the backup heater outlet temperature sensor (T1), typically require checking connections or replacing the sensor. Understanding these codes is essential for efficient troubleshooting and maintaining system reliability.

OMNIA HI3 08E fault codes

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-hi3-08e#fault-e0 to jump straight to the entry.

Complete list of fault codes for this Ferroli OMNIA HI3 08E
Code	Meaning	Details
E0	Flow switch error(E8 displayed 3 times) Show causes & actions Likely causes 1. The wire circuit is short connected or open. 2. Water flow rate is too low. 3. Water flow switch is failed, switch is open or close continuously, change the water flow switch. Engineer action Reconnect the wire correctly. change the water flow switch. Reset procedure Reset the safety by turning the unit OFF and back ON.	Details
E1	Phase sequence fault (only for three-phase unit) Show causes & actions Likely causes 1.Check the power supply cables should be connected stable, to avoid phase loss. 2.Check the power supply cables sequence, change any two cables sequence of the three power supply cables. Engineer action change any two cables sequence of the three power supply cables.	Details
E2	Communication error between wired controller and unit Show causes & actions Likely causes 1.wire doesn't connect between wired controller and unit. 2.Communication wire sequence is not right. 3. Whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc.. Engineer action Connect the wire. Reconnect the wire in the right sequence. To add a barrier to protect the unit or to move the unit to the other place.	Details
E3	The backup heater exchanger outlet water temperature sensor (T1) error Show causes & actions Likely causes 1. The T1 sensor connector is loosen. 2. The T1 sensor connector is wet or there is water in. 3. The T1 sensor failure, change a new sensor. Engineer action Reconnect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor.	Details
E4	The domestic hot water temperature sensor (T5) error Show causes & actions Likely causes 1. The T5 sensor connector is loosen. 2. The T5 sensor connector is wet or there is water in. 3. The T5 sensor failure, change a new sensor. Engineer action Reconnect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor.	Details
E5	The condenser outlet refrigerant temperature sensor (T3) error. Show causes & actions Likely causes 1. The T3 sensor connector is loosen. 2. The T3 sensor connector is wet or there is water in. 3. The T3 sensor failure, change a new sensor. Engineer action Reconnect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor.	Details
E6	The outdoor air temperature sensor (T4) error. Show causes & actions Likely causes 1. The T4 sensor connector is loosen. 2. The T4 sensor connector is wet or there is water in. 3. The T4 sensor failure, change a new sensor. Engineer action Reconnect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor.	Details
E8	Water flow failure Show causes & actions Likely causes Check that all shut off valves of the water circuit are completely open. Check if the water filter needs cleaning. Refer to "9.4 Charging water" Make sure there is no air in the system (purge air). Check on the manometer that there is sufficient water pressure. The water pressure must be >1 bar. Check that the pump speed setting is on he highest speed. Make sure that the expansion vessel is not broken. Check that the resistance in the water circuit is not too high for the pump (refer to "10.6 Setting the pump speed"). If this error occurs at defrost operation (during space heating or domestic water heating), make sure that the backup heater power supply is wired correctly and that fuses are not blown. Check that the pump fuse and PCB fuse are not blown. Engineer action Check that all shut off valves of the water circuit are completely open. Check if the water filter needs cleaning. Refer to "9.4 Charging water" Make sure there is no air in the system (purge air). Check on the manometer that there is sufficient water pressure. The water pressure must be >1 bar. Check that the pump speed setting is on he highest speed. Make sure that the expansion vessel is not broken. Check that the resistance in the water circuit is not too high for the pump (refer to "10.6 Setting the pump speed"). If this error occurs at defrost operation (during space heating or domestic water heating), make sure that the backup heater power supply is wired correctly and that fuses are not blown. Check that the pump fuse and PCB fuse are not blown.	Details
E9	Suction pipe sensor (Th) error Show causes & actions Likely causes 1. The Th sensor connector is loosen. 2. The Th sensor connector is wet or there is water in. 3. The Th sensor failure, change a new sensor. Engineer action Re connect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor. Reset procedure Th intervention <15° C for 15 min, automatic reset Th> 27 ° C	Details
EA	Probe error Tp (compressor discharge) Show causes & actions Likely causes 1. The Th sensor connector is loosen. 2. The Th sensor connector is wet or there is water in. 3. The Th sensor failure, change a new sensor. Engineer action Re connect it. Remove the water, make the connector dry. Add waterproof adhesive. change a new sensor. Reset procedure Tp intervention <15° C for 5 min, automatic reset Th> 27 °C	Details
ED	Tw_in probe error (evaporator water inlet) Show causes & actions Likely causes 1. Check the electrical connection (reset if incorrect). 2. The probe is faulty, replace the probe. 3. Replace the hydronic module control board. Engineer action Replace the probe. Replace the hydronic module control board. Reset procedure Th intervention <15° C for 15 min, automatic reset Th> 27 °C	Details
EE	Eprom error hydronic module control board Show causes & actions Likely causes 1. Replace the faulty card. Engineer action Replace the faulty card.	Details
H0	Communication error between PCB board and idronic control board Show causes & actions Likely causes 1.wire doesn't connect between indoor unit and outdoor unit. 2.Communication wire sequence is not right. 3. Whether there is a high magnetic field or high power interfere, such as lifts, large power transformers, etc.. Engineer action connect the wire. Reconnect the wire in the right sequence. To add a barrier to protect the unit or to move the unit to the other place.	Details
H1	Communication error between PCB A and PCB B Show causes & actions Likely causes 1. Whether there is power connected to the PCB and driven board. Check the PCB indicator light is on or off. If Light is off, reconnect the power supply wire. 2.if light is on, check the wire connection between the main PCB and driven PCB, if the wire loosen or broken, reconnect the wire or change a new wire. 3. Replace a new main PCB and driven board in turn. Engineer action reconnect the power supply wire. reconnect the wire or change a new wire. Replace a new main PCB and driven board in turn.	Details
H2	The plate heat exchanger refrigerant inlet (liquid pipe) temperature sensor(T2) error. Show causes & actions Likely causes 1.The T2 sensor connector is loosen. 2.The T2 sensor connector is wet or there is water in. 3. The T2 sensor failure, change a new sensor. Engineer action Re connect it. Remove the water, make the connector dry. Add waterproof adhesive change a new sensor.	Details
H3	The plate heat exchanger refrigerant outlet (gas pipe) temperature sensor (T2B) error. Show causes & actions Likely causes 1. The T2B sensor connector is loosen. 2.The T2B sensor connector is wet or there is water in. 3. The T2B sensor failure, change a new sensor. Engineer action Re connect it. Remove the water, make the connector dry. Add waterproof adhesive change a new sensor.	Details
H4	Three times P6 protect Show causes & actions Same to P6 Likely causes Same to P6	Details
H5	The indoor temperature sensor(Ta) error Show causes & actions Likely causes 1. The Ta senor is in the interface; 2. The Ta sensor failure change a new sensor or change a new interface. Engineer action change a new sensor or change a new interface.	Details
H6	The DC fan failure Show causes & actions Likely causes 1. Strong wind or typhoon below toward to the fan, to make the fan running in the opposite direction. 2.fan motor is broken, change a new fan motor. Engineer action Change the unit direction or make shelter to avoid typhoon below to the fan. change a new fan motor.	Details
H7	Main supply voltage circuit voltage out of limits Show causes & actions Likely causes 1. Whether the power supply input is in the available range. 2. Power off and power on for several times rapidly in short time. Remain the unit power off for more than 3 minutes than power on. 3. the circuit defect part of Main control board is defective. Replace a new Main PCB. Engineer action Replace a new Main PCB.	Details
H8	Pressure sensor failure Pe Show causes & actions Likely causes 1. Pressure sensor connector is loosen, reconnect it. 2. Pressure sensor failure. change a new sensor. Engineer action reconnect it. change a new sensor.	Details
H9	The system outlet water temperature sensor T1B failure. Show causes & actions Likely causes 1. The T1B sensor connector is loosen. 2.The T1B sensor connector is wet or there is water in. 3. The T1B sensor failure, change a new sensor. Engineer action Reconnect it. remove the water, make the connector dry. add waterproof adhesive change a new sensor.	Details
HA	The plate heat exchanger water outlet temperature sensor (Twout) error Show causes & actions Likely causes 1. The Twout sensor connector is loosen. 2.The Twout sensor connector is wet or there is water in. 3. The Twout sensor failure, change a new sensor. Engineer action Reconnect it. remove the water, make the connector dry. add waterproof adhesive change a new sensor.	Details
HE	The condenser refrigerant outlet temperature is too high in heating mode for more than 10 minutes. Show causes & actions Likely causes The outside outdoor air temperature is too high(higher than 30°C, the unit still operate heat mode. close the heat mode when the outdoor air temperature is higher than 30°C Engineer action close the heat mode when the outdoor air temperature is higher than 30°C	Details
HF	PCB B EEprom failure Show causes & actions Likely causes 1. The EEprom parameter is error, rewrite the EEprom data. 2. EEprom chip part is broken, change a new EEprom chip part. 3. Main PCB is broken, change a new PCB. Engineer action rewrite the EEprom data. change a new EEprom chip part. change a new PCB.	Details
HH	H6 displayed 10 times in 2 hours Show causes & actions Refer to H6 Likely causes Refer to H6	Details
PO	Low pressure protection Show causes & actions automatic reset, Pe <1.4 bar, Pe> 3 bar Likely causes 1. System is lack of refrigerant volume. 2.When at heating mode or heat water mode, Heat exchanger is dirty or something is block on the surface. 3. The water flow is low in cooling mode. 4. Electrical expansion valve locked or winding connector is loosen. Engineer action Charge the refrigerant in right volume. Clean the heat exchanger or remove the obstruction. Tap-tap the valve body and plug in/ plug off the connector for several times to make sure the valve is working correctly. And install the winding in the right location.	Details
HPLockout	3 times PO intervention in 60 minutes (manual reset) Show causes & actions 3 times PO intervention in 60 minutes (manual reset) Likely causes Same as PO Engineer action Same as PO	Details
P1	High pressure protection Show causes & actions automatic reset Pc> 44 bar, Pc <34 bar Likely causes Heating mode, DHW mode: 1. The water flow is low; water temp is high, whether there is air in the water system. Release the air. 2. Water pressure is lower than 0.1Mpa, charge the water to let the pressure in the range of 0.15~0.2Mpa. 3. Over charge the refrigerant volume. Recharge the refrigerant in right volume. 4. Electrical expansion valve locked or winding connector is loosen. DHW mode: Water tank heat exchanger is smaller than the required 1.7m².(10-16kW unit)or 1.4m² (5-7kW unit) Cooling mode: 1.Heat exchanger cover is not removed. 2. Heat exchanger is dirty or something is block on the surface. Clean the heat exchanger or remove the obstruction. Engineer action Heating mode, DHW mode: Release the air. charge the water to let the pressure in the range of 0.15~0.2Mpa. Recharge the refrigerant in right volume. Tap-tap the valve body and plug in/ plug off the connector for several times to make sure the valve is working correctly. And install the winding in the right location DHW mode: Water tank heat exchanger is smaller than the required 1.7m².(10-16kW unit)or 1.4m² (5-7kW unit) Cooling mode: Remove it. Clean the heat exchanger or remove the obstruction.	Details
P3	Compressor overcurrent protection Show causes & actions Likely causes 1.The same reason to P1. 2. Power supply voltage of the unit is low, increase the power voltage to the required range. I> 20A for mod. 5-7-9 kW (single phase) I> 31A for mod. 10-12-14-16 kW (single phase) I> 15A for mod. 12T-14T-16T kW (three phase) Engineer action Same as P1. increase the power voltage to the required range.	Details
P4	High discharge temperature protection Show causes & actions Tp > 115°C, Tp < 90°C) Likely causes 1. The same reason to P1. 2. System is lack of refrigerant volume. 3. Twout temp sensor is loosen Reconnect it.. 4. T1 temp sensor is loosen. 5. T5 temp sensor is loosen. Engineer action Same as P1. Charge the refrigerant in right volume. Reconnect it. Reconnect it. Reconnect it.	Details
P5	High Temperature difference protection between water inlet and water outlet of the plate heat exchanger Show causes & actions AT > 30°C Likely causes 1. Check that all shut off valves of the water circuit are completely open. Check if the water filter needs cleaning. Refer to "9.4 Charging water" Make sure there is no air in the system (purge air). Check on the manometer that there is sufficient water pressure. The water pressure must be >1 bar (water is cold). Check that the pump speed setting is on he highest speed. Make sure that the expansion vessel is not broken. Check that the resistance in the water circuit is not too high for the pump (refer to "10.6 Setting the pump speed"). Engineer action Check that all shut off valves of the water circuit are completely open. Check if the water filter needs cleaning. Refer to "9.4 Charging water" Make sure there is no air in the system (purge air). Check on the manometer that there is sufficient water pressure. The water pressure must be >1 bar (water is cold). Check that the pump speed setting is on he highest speed. Make sure that the expansion vessel is not broken. Check that the resistance in the water circuit is not too high for the pump (refer to "10.6 Setting the pump speed").	Details
P6	Compressor module protection Show causes & actions Likely causes 1. Power supply voltage of the unit is low, increase the power voltage to the required range. 2. The space between the units is too narrow for heat exchange. Increase the space between the units. 3. Heat exchanger is dirty or something is block on the surface. Clean the heat exchan-ger or remove the obstruction 4. Fan is not running. Fan motor or fan is broken, Change a new fan or fan motor. 5. Over charge the refrigerant volume. Recharge the refrigerant in night volume. 6. Water flow rate is low, there is air in system, or pump head is not enough. Release the air and reselect the pump. 7. Water outlet temp sensor is loosen or broken, reconnect it or change a new one. 8. Water tank heat exchanger is smaller than the required 1.7m².(10-16kW unit)or 1.4m²(5-7kW unit) 9.Module wires or screws are loosen. Reconnect wires and screws. The Thermal Conductive Adhesive is dry or drop. Add some thermal conductive adhesi-ve. 10. The wire connection is loosen or drop. Reconnect the wire. 11. Drive board is defective, replace a new one. 12. if already confirm the control system has no problem, then compressor is defective, replace a new compressor. Engineer action increase the power voltage to the required range. Increase the space between the units. Clean the heat exchan-ger or remove the obstruction Change a new fan or fan motor. Recharge the refrigerant in night volume. Release the air and reselect the pump. reconnect it or change a new one. Reconnect wires and screws. Add some thermal conductive adhesi-ve. Reconnect the wire. replace a new one. replace a new compressor.	Details
LO	Inverter module error Show causes & actions Engineer action Contact your local dealer	Details
L1	Inverter module low voltage protection Show causes & actions Engineer action Contact your local dealer	Details
L2	Inverter module high voltage protection Show causes & actions Engineer action Contact your local dealer	Details
L4	MEC error Show causes & actions Engineer action Contact your local dealer	Details
L5	Compressor 0 speed protection Show causes & actions Engineer action Contact your local dealer	Details
L7	Power phase error Show causes & actions Engineer action Contact your local dealer	Details
L8	Compressor frequency change is larger than 15Hz between this moment and last moment Show causes & actions Engineer action Contact your local dealer	Details
L9	The difference between target frequency and compressor operationg frequency is larger than 15Hz. Show causes & actions Engineer action Contact your local dealer	Details
Pb	Anti-freeze mode protection. Show causes & actions Unit will return to the normal operation automatically. Engineer action Unit will return to the normal operation automatically.	Details
Pd	High temperature protection of refrigerant outlet temp of condenser. Show causes & actions T3 > 62°C, T3 < 52°C) Likely causes 1. Heat exchanger cover is not removed. 2. Heat exchanger is dirty or something is block on the surface. 3, There is no enough space around the unit for heat exchanging. 4. fan motor is broken, replace a new one. Engineer action Remove it. Clean the heat exchanger or remove the obstruction. fan motor is broken, replace a new one.	Details
PP	Water inlet temperature is higher than water outlet in heating mode Show causes & actions Likely causes 1.The water inlet/outlet sensor wire connector is loosen. 2.The water inlet/outlet (Tw_in /Tw_out) sensor is broken, Change a new sensor. 3. Four-way valve is blocked. Restart the unit again to let the valve change the direction. Four-way valve is broken, change a new valve. Engineer action Reconnect it. Change a new sensor. Restart the unit again to let the valve change the direction. change a new valve.	Details

Common OMNIA HI3 08E problems & troubleshooting

Patterns that group across the manufacturer's fault-code table. Each entry links to the full code listing further down the page.

How to fix the OMNIA HI3 08E 3 times po intervention in 60 minutes (manual reset)Lockout

Engineer: Same as PO

Triggered by fault code HP.

How to fix the OMNIA HI3 08E flow switch error(e8 displayed 3 times)

Engineer: Reconnect the wire correctly. change the water flow switch.

Triggered by fault code E0.

How to fix the OMNIA HI3 08E phase sequence fault (only for three-phase unit)

Engineer: change any two cables sequence of the three power supply cables.

Triggered by fault code E1.

How to fix the OMNIA HI3 08E communication error between wired controller and unit

Engineer: Connect the wire. Reconnect the wire in the right sequence. To add a barrier to protect the unit or to move the unit to the other place.

OMNIA HI3 08E

OMNIA HI3 08E at a glance

OMNIA HI3 08E

OMNIA HI3 08E at a glance

Register this Ferroli OMNIA HI3 08E on BoilerTag

OMNIA HI3 08E data sheet

Engineer's overview

OMNIA HI3 08E fault codes

Common OMNIA HI3 08E problems & troubleshooting

How to fix the OMNIA HI3 08E 3 times po intervention in 60 minutes (manual reset)Lockout

How to fix the OMNIA HI3 08E flow switch error(e8 displayed 3 times)

How to fix the OMNIA HI3 08E phase sequence fault (only for three-phase unit)

How to fix the OMNIA HI3 08E communication error between wired controller and unit

OMNIA HI3 08E FAQs

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Working on a Ferroli OMNIA HI3 08E?

How to fix the OMNIA HI3 08E the backup heater exchanger outlet water temperature sensor (t1) error

Likely causes that trigger multiple OMNIA HI3 08E fault codes

OMNIA HI3 08E at a glance

OMNIA HI3 08E at a glance

Register this Ferroli OMNIA HI3 08E on BoilerTag

OMNIA HI3 08E data sheet

Engineer's overview

OMNIA HI3 08E fault codes

Common OMNIA HI3 08E problems & troubleshooting

How to fix the OMNIA HI3 08E 3 times po intervention in 60 minutes (manual reset)Lockout

How to fix the OMNIA HI3 08E flow switch error(e8 displayed 3 times)

How to fix the OMNIA HI3 08E phase sequence fault (only for three-phase unit)

How to fix the OMNIA HI3 08E communication error between wired controller and unit

OMNIA HI3 08E FAQs

Does the Ferroli OMNIA H heat pump have a quiet mode?

What heating capacities are available in the Ferroli OMNIA H range?

What does fault code E8 mean on a Ferroli OMNIA H heat pump?

Where can I download the Ferroli OMNIA H installation manual?

What control options are available for the Ferroli OMNIA H heat pump?

What is the recommended service interval for the Ferroli OMNIA H?

Every boiler brochure, free with BoilerTag

Other Ferroli heat pumps

Working on a Ferroli OMNIA HI3 08E?

How to fix the OMNIA HI3 08E the backup heater exchanger outlet water temperature sensor (t1) error

Likely causes that trigger multiple OMNIA HI3 08E fault codes