Ariston NUOS PLUS 200 Instructions For Installation, Use, Maintenance page 32

Hysteresis value that allows the heat pump to restart
P9 HYST HP after having achieved the target temperature. It can be
set by the installer in the [3 / 12°C] range.
This parameter gives the capacity of the tank; it is ueful
P10 TANKVOL
in case of spare part customization.
Operation with PV:
0. OFF (PV disabled - default)
P11 PV MODE 1. PV_HP (PV with HP only)
2. PV_HE (PV with HP and HE1)
3. PV_HEHP (PV with HP and HE1 + HE2)
This parameter gives the temperature to be achieved
P12 PV TSET in PV mode. It can be set by the installer in the [55 / 75
°C] range.
Operation with SG:
P13 SG MODE 0. OFF (SG disabled - default)
1. HP_ON (SG enabled with HP only)
System Operation:
0. STD (standard installation)
1. OUT (The product is configured to operate with a
coil auxiliary load controlled by the direct AUX con-
tact)
P14 SYSMODE
2. PRHE (The product is configured as a generator in
pre-heating to operate with an auxiliary load and
share the domestic hot water parameters)
3. SYS (The product is configured to operate with a coil
auxiliary load controlled via Bus)
Disable/enable the BUZZER beep at buttons pressure.
P15 BUZZER ON (function enabled)
OFF (function disabled)
Enable/disable the SILENT mode
P16 SILENT ON (function enabled)
OFF (function disabled)
Restoring the factory settings
All the user settings will be reset to default values with
P18 FACT RS
the only exception of energy statistics, tank volume
and Wi-Fi (if present)
P19 MB SW HP-TOP-MB software version as MM.mm.bb.
P20 HMI S HP-MED-HMI software version as MM.mm.bb.
Gives the water temperature in °C read by the NTC
P21 T LOW placed at low position in the water tank.
If the NTC is in error "-" is shown
Gives the water temperature in °C read by the NTC
P22 T HIGH placed at high position in the water tank.
If the NTC is in error "-" is shown
Gives the water temperature in °C read by the NTC
P23 T DOME
placed at dome position in the water tank.
If the NTC is in error "-" is shown
Gives the air temperature in °C read by the NTC placed
P24 T AIR on the outside unit.
If the NTC is in error "-" is shown
Gives the gas temperature in °C read by the NTC
P25 T EVAP placed before the evaporator on the outside unit.
If the NTC is in error "-" is shown
Gives the gas temperature in °C read by the NTC
P26 T SUCT placed before the compressor on the outside unit.
If the NTC is in error "-" is shown
Gives the gas temperature in °C read by the NTC
P27 T COND placed after the condenser on the outside unit.
If the NTC is in error "-" is shown
Gives the gas temperature in °C read by the NTC
P28 T DISC placed after the compressor on the outside unit.
If the NTC is in error "-" is shown
Gives the superheating temperature in °C. If the NTC
P29 T SH
evap or suction are in error "-" is shown
P30 ERRORS Allows navigation among last 10 errors that occurred
The Wi-Fi function (if available) can be set to:
P31 WI-FISET ON (function enabled)
OFF (function disabled)
Repetition every [1-30] days for the antibacterial cycle if
P32 F ANTB
active
P33 EBUS POWER ON (function enabled) - OFF (function disabled)
P34 HP-TYPE Cascade setting [Master-Slave1,......Slave7]
32 /EN
• P11 PARAMETER - PHOTOVOLTAIC MODE "
If you have a photovoltaic system, you can set the product to op-
timise use of the electricity produced. After having done the elec-
trical connections as described in paragraph 4.11 fig. 14 and set the
P11 parameter to other than "0".
The signal should be received at least for 5 minutes to enable the
photovoltaic function (once the product starts a cycle, it will oper-
ate for at least 30 minutes).
When the signal is detected, the operating mode works as follow::
- OFF (value 0 – default)
PV mode disabled
- PV_HP (value 1)
When the signal from the inverter is present. The product will
reach the set temperature (the highest between T SET POINT
and PV TSET) with only the heat pump (max 62°C).
- PV HE (value 2)
The product will reach the set temperature (the highest between
T SET POINT and PV TSET) operating with only the heat pump
up to 62°C and if needed with the heating element (1500 W).
- PV_HEHP (value 3)
set temperature (the highest between T SET POINT and T W PV)
is achieved with the heat pump and the heating element (1000
W) up to 62°C. For higher Temeratures than 62 °C the second
heating element (1500 W) is activated.
• P13 PARAMETER - SG FUNCTION
If you have an SG signal, you can connect the signal cable as de-
scribed in the "electrical connections" chapter when the function
P13 is enabled the SG icon will be displayed.
Once the SIG2 signal has been received for at least 5 minutes
(once the product starts a cycle, it will work for at least 30 minutes),
the name of the selected mode alternates with the text SG ON and
the current operating mode is automatically changed by thermo-
stating the product at set temperature (the maximum between T
SET POINT and PV TSET), operating only with the heat pump (max
62 ° C).
• P16 PARAMETER - SILENT
This function reduces the sound level (performance can vary from
those declared). It can be enabled via the P6 parameter on the
installer's menu P16. Once activated, the symbol appears on the
display" ".
ANTI-FROST FUNCTION
If the temperature of the water in the tank falls below 5 °C while the
appliance is powered, the heating element (1000 W) will be automat-
ically activated to heat the water up to 16 °C.
DEFROST " "
The defrost function is activated when the heat pump has been work-
ing for at least 20 minutes, the detected air temperature is below
15°C and the evaporator temperature is decreasing rapidly. When the
defrost cycle is running, the icon to the side is displayed.
"