Ferroli RVL-I PLUS, Installation And Maintenance Manual

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This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit .
This troubleshooting and related corrective actions may only be carried out by your local technician .
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 .
General guidelines
Possible malfunctioning
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 pres-
sure relief valve to avoid water dripping out of the unit!
WARNING
For problems related to the optional solar kit for domestic water heating, refer to the troubleshooting in the Installation & Owner's
manual for that kit .
The unit is turned on but the unit is not heating or cooling as expected
NOTE
POSSIBLE CAUSES CORRECTIVE ACTION
The temperature setting
is not correct .
Check the controller set point .T4HMAX, T4HMIN in heat mode .T4CMAX,T4CMIN in cool mode .
T4DHWMAX,T4DHWMIN in DHW mode .
The water flow is too
low .
• Check that all shut off valves of the water circuit are completely open .
• Check if the water filter needs cleaning .
• 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) .
• Make sure that the expansion vessel is not broken .
• Check that the resistance in the water circuit is not too high for the pump
The water volume in the
installation is too low .
Make sure that the water volume in the installation is above the minimum required value (refer to "9 .3
water pipework/Checking the water volume and expansion vessel pre-pressure") .
SAFETY AND MAINTENANCE