Technical data
47  CTC EcoZenith i250
General Information
8.11  Alarm log 
You can use this to read information about the latest 
alarms. The latest alarm is displayed at the top and the 
four latest alarms are shown under Stored alarms.
An alarm which reoccurs within an hour is ignored so 
as not to fill up the log. If all the alarms are the same, 
this can indicate that there is an intermittent fault, e.g. a 
loose contact.
1 2
1 2
T ºC
60
40
20
0
-20
16  20  0  4  8 12
Radiatorsystem forts
  58 ºC  -5 ºC
Info golvtorkning estricht
Room temp.
Heating circuit 1
Night reduction Holiday
Room temp.
Heating circuit 1 (50)
Night reduction Holiday
Set. heat pump
Compressor   Permitted
1
Min outdoor temp °C  -15
2
Brine pump on    Auto
Tariff HP    Off
Minimum run time    6
Electric heater
Boiler upper°C    50
Boiler upper add°C    57
Boiler upper extra DHW°C  60
Boiler upper max kW    5.5
Boiler lower °C    55
Boiler lower max kW    6.0
Delay mixing valve    180
Main fuse A    25
Input voltage    3x400 V
Tariff EL    Off
Upper tank
Stop temp HP°C    Max
Start/stop diff upper ºC  7
Max time upper tank    20
Max time lower tank    40
Communication
MB address    1
Baud rate    9600
Parity   even
Stop bit    1
Installer
Save settings
Save settings
Load factory settings
Def Heat pump
Heat pump  Off
Flow/level switch  None
Test Heating circuit
Mixing valve1    Open
Rad pump1    On
Mixing valve2    Off
Rad pump2    Off
LED room sensor    On
Test valves
Test Elec.heater
3-way valve    Down
Electric heater L1A    Off
Electric heater L1B    Off
Electric heater L2A    Off
Electric heater L2B    Off
Electric heater L3A    Off
Electric heater L3B    Off
Electric heater A13    Off
Alarm log 
Latest alarm:  Time  HP (b) LP (b)  SH (K) I(A)
Low brine flow  07:20 6/3  8.8  3.3  15.9  3.9
Stored alarms:
Wrong phase order  10:30 1/3  27.9  8.6  -227  50.0
Com. err m. protect 09:01 1/3  27.9  3.6  42.2  0.0
Factory settings coded
Code  0 0 0 0
Upper tank 
Lower tank
Compressor operation
Expansion valve
Log compressor stop
Cooling
Operation data heating 2
Out  Room1 Prim1  Return Room2  Prim2
Test Heat pump
HP Compr.    Off
HP Brine p/Fan    Off
HP Charge p    0
Defrost Manually    Off
Compressor heat    Off
Drip tray heater    Off
Heating Cable    Off
4-way valve(Y11)    Off
Inst. Radiatorsystem1
<<
Anti Water Hammer    No
HP max DHW    Yes
Drying period mode    Off
Drying period temp ºC  25
 Room temp.  DHW  Operation  Installer
  Drying period activ  1  /  12  (25)
CTC EcoZenith  Monday 09:35
Factory settings coded
This menu is intended to set the manufacturer's 
operational and alarm limits. A 4-digit code must be 
specified to be able to amend these limits. However, 
you can also take a look without any code to see what 
options feature in the menu.
!
NB: Only an authorised service engineer is allowed to log in to the Factory settings 
coded option. Severe operational problems and faults may occur affecting the 
product if values are amended without authorisation. Note that in such cases the 
warranty terms do not apply.
1 2
1 2
T ºC
60
40
20
0
-20
16  20  0  4  8 12
Radiatorsystem forts
  58 ºC  -5 ºC
Info golvtorkning estricht
Room temp.
Heating circuit 1
Night reduction Holiday
Room temp.
Heating circuit 1 (50)
Night reduction Holiday
Set. heat pump
Compressor   Permitted
1
Min outdoor temp °C  -15
2
Brine pump on    Auto
Tariff HP    Off
Minimum run time    6
Electric heater
Boiler upper°C    50
Boiler upper add°C    57
Boiler upper extra DHW°C  60
Boiler upper max kW    5.5
Boiler lower °C    55
Boiler lower max kW    6.0
Delay mixing valve    180
Main fuse A    25
Input voltage    3x400 V
Tariff EL    Off
Upper tank
Stop temp HP°C    Max
Start/stop diff upper ºC  7
Max time upper tank    20
Max time lower tank    40
Communication
MB address    1
Baud rate    9600
Parity   even
Stop bit    1
Installer
Save settings
Save settings
Load factory settings
Def Heat pump
Heat pump  Off
Flow/level switch  None
Test Heating circuit
Mixing valve1    Open
Rad pump1    On
Mixing valve2    Off
Rad pump2    Off
LED room sensor    On
Test valves
Test Elec.heater
3-way valve    Down
Electric heater L1A    Off
Electric heater L1B    Off
Electric heater L2A    Off
Electric heater L2B    Off
Electric heater L3A    Off
Electric heater L3B    Off
Electric heater A13    Off
Alarm log 
Latest alarm:  Time  HP (b) LP (b)  SH (K) I(A)
Low brine flow  07:20 6/3  8.8  3.3  15.9  3.9
Stored alarms:
Wrong phase order  10:30 1/3  27.9  8.6  -227  50.0
Com. err m. protect 09:01 1/3  27.9  3.6  42.2  0.0
Factory settings coded
Code  0 0 0 0
Upper tank 
Lower tank
Compressor operation
Expansion valve
Log compressor stop
Cooling
Operation data heating 2
Out  Room1 Prim1  Return Room2  Prim2
Test Heat pump
HP Compr.    Off
HP Brine p/Fan    Off
HP Charge p    0
Defrost Manually    Off
Compressor heat    Off
Drip tray heater    Off
Heating Cable    Off
4-way valve(Y11)    Off
Inst. Radiatorsystem1
<<
Anti Water Hammer    No
HP max DHW    Yes
Drying period mode    Off
Drying period temp ºC  25
 Room temp.  DHW  Operation  Installer
  Drying period activ  1  /  12  (25)
CTC EcoZenith  Monday 09:35










