NExSIRIUS
72
NExSIRIUS
72
EN
Code
Item
Cause
Effect
Solution
2
Temperature/humidity sensor of user
interface in zone 1
Value out of range + Code 105.0 =
1 or 4
Room temperature/humidity is not
available
Related functions are not available
Check user interface wiring and
electrical connections
3
TWB
Value out of range
Backup heaters are OFF
Check sensor, wiring and electrical
connections
4
TC
Value out of range
Outdoor unit stops
Domestic water valve OFF if code
127 = 1
Check sensor, wiring and electrical
connections
5
Domestic hot water temperature
sensor
Value out of range + Code 133 = 1 or 2
Backup heaters are OFF
Disinfection function not performed
Check sensor, wiring and electrical
connections
6
Communication with user interface
(conneted to W-C-G-Y terminal
blocks)
Communication lost
No communication between unit
and interface
Unit runs with values stored in
memory
Room temperature and humidity are
not available if code 105.0 = 1 or 4 or
105.1 = 1 or 4
Check wiring and connections
7
Communication with additional user
interface (connected to Rc-Rh-G2-Y2
terminal blocks) in zone 1
Communication lost + Code 105.0 = 1
No communication between unit
and interface
Room temperature and humidity are
not available in zone 1
Unit runs with values stored in
memory
Check wiring and connections
8
Flow switch
Water pump is OFF
Flowswitch detects flow
Outdoor unit, backup heaters,
domestic water valve, water pump:
OFF
Check setting of code 107.1
Check flowswitch
9
Flow switch
Water pump is ON
Flowswitch detects no flow
Outdoor unit, backup heaters,
domestic water valve, water pump:
OFF
Check setting of code 107.0
Check flowswitch, wiring and
electrical connections
Check floor heating thermal cut off if
connected
If reset is needed, press the red
button and check climatic curve
settings (codes 112 to 118)
10
EEProm
EEProm is corrupt
Entire system stops
Check settings of codes 100, 103, 105,
106, 107
If settings are correct, contact service
11
Communication Master - Slave
Communication lost + Code 100 = 2
Entire system stops
Check wiring and connections
12
Communication with additional user
interface (connected to Rc-Rh-G2-Y2
terminal blocks) in zone 2
Communication lost + Code 105.0 = 1
No communication between unit
and interface
Room temperature and humidity are
not available in zone 2
Unit runs with values stored in
memory
Check user interface wiring and
electrical connections
13
System configuration
Code 100 = 1 + 1 Communication with
slave board is detected .
Entire system stops
2-zone kit is installed
Set code 100 = 2
14
HV Communication with CDU
Communication lost
Outdoor unit stops
Domestic water valve OFF if code
127 = 1
15
LWT
Value out of range
Outdoor unit stops
Domestic water valve OFF if code
127 = 1
Check sensor, wiring and electrical
connections
16
Zone control
Code 100=1 +
Code 105.0=2
Code 100=2 +
Code 105.0=2 +
Code 105.1 = 2 o
Code 100=2 +
Code 105.0=4 +
Code 105.1 = 4
Entire system stops
Change setting of code 105
34
EH temperature warning
Backup heater is active + TWB does
not increase by 1 °C every 30 min
No effect on system operation
Check backup heater operation,
wiring and electrical connections.
*
LOW domestic hot water temperature
warning
Code 133 = 1 or 2 + Domestic hot
water priority = 1 + Booster heater
schedule OFF + code 1.5 = 0
Domestic water tank electric heater
icon
will flash on the user
interface screen
Domestic hot water temperature is
cold and schedule prevents booster
heater activation
User can activate booster heater
by setting code 1.5 = 1 (termporary
activation) or by enabling it in the
schedule
Содержание NexSirius
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