Ferroli OMNIA S HYBRID C 3.2, Руководство по установке, использованию и обслуживанию

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EN
Cod. 3542B250 - Rev. 00 - 02/2022
OMNIA S HYBRID C 3.2
12.1 General guidelines
Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective
wiring.
WARNING
When carrying out an inspection on the switch box of the unit, always make sure that the main switch of the unit is
switched off.
When a safety device was activated, stop the unit and find out why the safety device was activated before resetting
it. Under no circumstances can safety devices be bridged or changed to a value other than the factory setting. If the
cause of the problem cannot be found, call your local dealer.
If the pressure relief valve is not working correctly and is to be replaced, always reconnect the flexible hose attached
to the pressure relief valve to avoid water dripping out of the unit!
12.2 General symptoms
Symptom 1
: the unit is turned on but is not heating or cooling as expected
Possible causes Corrective action
Some parameter settings are incorrect. Check the parameters
T4HMAX, T4HMIN in heating mode.
T4CMAX, T4CMIN in cooling mode
T4DHWMAX, T4DHWMIN in DHW mode.
The water flow is too low. Make sure that all the shut-off valves in the hydraulic circuit are open.
Check if the water filter is clogged.
Check that there is no air in the hydraulic circuit.
Check the water pressure. The water pressure must be > 1 bar (with cold system water).
Make sure that the expansion vessel is not broken.
Check that the pressure drop in the hydraulic circuit is not too high for the pump.
The volume of water in the installation is too low. Make sure that the volume of water in the installation is higher than the minimum value requested
Symptom 2 : the unit is turned on but the compressor does not start (system heating or DHW heating)
Possible causes Corrective action
The unit could be operating outside its operating
range (the water temperature is too low).
If the water temperature is low, the system uses the reserve system electric heater to reach the first minimum water
temperature (12°C).
Check that the reserve system electric heater power supply is correct.
Check that the electric protection of the reserve system electric heater is correct.
Check that the thermal cut-off switch of the reserve system electric heater is not activated.
Check that the reserve system electric heater meters are not faulty.
Symptom 3 : the pump is noisy (cavitation)
Possible causes Corrective action
There is air in the system. Bleed the air.
The pump input water pressure is too low. Check the water pressure.
The water pressure must be > 1 bar (measured with cold water).
Make sure that the expansion vessel is not broken or empty.
Check that the preload of the expansion vessel is correct
Symptom 4 : the water pressure relief valve opens
Possible causes Corrective action
The expansion vessel is broken or empty Replace the expansion vessel. Refill the expansion vessel.
The filling water temperature in the system is
greater than 3 bar.
Make sure that the filling water temperature in the system is about 1 or 2 bar.
Symptom 5 : the water pressure relief valve leaks
Possible causes Corrective action
Dirt has blocked the water safety valve. Check that the safety valve is working correctly by turning the red knob on the valve anti-clockwise:
• If you don’t hear a metallic noise, contact the local technical support service.
• If the water continues to leak from the unit, close the water input and output check valves and then, contact the local
technical support service.
Symptom 6 : room heating capacity insufficient when external temperatures are low
Possible causes Corrective action
The reserve system electric heater operation is
not enabled.
Check that the system electric heater is enabled “9.2.2 Heat pump service menu" on page 59.
Check if the reserve system electric heater thermal cut-off switch is enabled or not.
Check if the DHW electric heater is working, the back-up heater and DHW electric heater cannot operate at the same time.
A high heating capacity has been requested in
DHW mode or some parameters are not cor-
rectly set (only applicable to installation with DHW
heater).
Check that “t_DHWHP_MAX” and “t_DHWHP_RESTRICT” re configured properly:
• Check that “HOT WATER PRIORITY” is disabled in the user interface.
• Enable “T4_TBH_ON” in the user interface / FOR SERVICEMAN to activate the electric heating element of the DHW
boiler for heating domestic hot water.