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TROUBLESHOOTING
Problem
Possible Causes
How to Proceed
Failure in electronic board
Power supply failure
Check the power supply
Check the corresponding circuit breaker
Cable damaged or disconnect- ed
Check the integrity of the electronic board’s
electric circuit
Low water temperature or
lack of hot water
Low temperature programmed as
the set-point
Adjust the temperature of the set-point. 53
°
C
from factory
Error activation
Check the presence of error on electronic
board and consult the table of errors
Cable damaged or disconnect- ed
Check the connection of equipment to the plug
Check that the corresponding circuit-breaker is
connected
Check the integrity of the cables
Check that the electrical cable is disconnected
from the power board
Check electric protection (fuse)
Vacation mode ON
Turn OFF the vacation mode
Equipment or compressor OFF
Check “5.4 Start up of the system”
Use of large amount of hot water
Change the equipment to “BOOST” mode for a
fast water heating
Return of hot water into the cold
water
circuit
(safety
device
incorrectly installed or damaged)
Shut off the cold water supply valve to switch
off the safety device. Open a hot water tap.
Wait 10 minutes and if you get hot water,
replace the faulty plumbing and/or proceed
with the correct positioning of the safety
device
ECO Mode selected and low
external temperature
Change the equipment to “AUTO” mode to
initiate automatic management of system
Electric heater OFF
Change the equipment to “BOOST” mode for a
fast water heating
Water is too hot and/ or
there is steam
Problem with the probe
Make sure the backup electric heater has
power supply
Problem with the safety thermostat Check error display on electronic board
