8.1.3.9 Different operating mode start
conditions
Each operating mode must comply with precise
conditions in order to be enabled:
AUTOMATIC operating mode
The condition in order to enable the start of this
function is as follows: lower probe< SP2 – r0
(hysteresis);
ECO operating mode
The condition in order to enable the start of this
function is as follows: lower probe< SP1 – r0
(hysteresis);
OVERBOOST operating mode
The condition in order to enable the start of this
function is as follows: lower probe< SP3and upper
probe< SP3.Once a temperature exceeding SP3
has been detected, the Overboost operating mode
terminates and the previously set operative mode
is restored.
8.1.3.10 The display
If the equipment is in the "ON" status, during normal
operation, the display will show the established
temperature by means of parameter P5:
If P5 = 0, the display will show the temperature of
the upper part of the boiler;
If P5 = 1, the display will show the active working
set point;
If P5 = 2, the display will show the temperature of
the lower part of the boiler;
If P5 = 3, the display will show the temperature of
the evaporator;
If the equipment is in the "stand-by" status, the
display will be switched off.
8.1.3.11 Alarms
N
OTE
In case of "UtL" alarm (fault of the fan), in
addition to the display visualization, the
equipment emits an acoustic signal that can
be switched off pressing any key on the
controller. The alarm it is never canceled
unless the equipment is switched off or put in
stand-by.
The heat pump working mode is automatically
disabled and the one with electric resistance is
activated in order to ensure the continuity of
the warm water supply.
PLEASE NOTE!
In case of "UtL" alarm it is necessary to
contact the technical assistance.
Installation and user manual
AL
Minimum temperature alarm
Solution:
- Check the temperature associated with the
alarm;
- Parameters displayed: A0, A1, A2 and A11.
Main consequences:
- The equipment will continue to work as
normal
AH
Maximum temperature alarm
Solutions:
- Check the temperature associated with the
alarm;
- Parameters displayed: A3, A4, A5 and A11.
Main consequences:
- The equipment will continue to work as
normal.
id
Digital input alarm
Solutions:
- Check the causes that originated the input
activation (possible short circuit in signal
cables)
- See parameters: i0; i1 and i2;
Main consequences:
- Compressor will be switched off;
- Defrosting will not be activated.
iSd
Blocked equipment alarm
Solutions:
- Check the causes that originated the digital
input activation
- See parameters: i0; i1; 18 and i9
- Switch the equipment off and then back on
again or disconnect the equipment from the
mains power supply.
Main consequences:
- Compressor will be switched off;
- Defrosting will be never activated.
FiL
Ventilation filter check alarm
Solutions:
- Check how clean the filter is (to switch off the
alarm message, press any key on the
display)
UtL
Probable fan fault
Solutions:
- See parameters SP10 and C14
- Check the fan conditions
Main consequences:
- Compressor and fan are switched off;
- Water heating occurs using only the electric
resistance.
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