The operation mode provides useful information for easy testing and debugging of the domestic hot water.
This information is available via parameter DISP-02 or the macro output "OperationMode".
The output operation mode should be connected to a multi-stage datapoint with the states as shown in the next table.
Since BACnet multi-stage points do not support the value "0", the operation mode value range starts with "1".
Table 10. Operation Modes
Operation Mode |
Comments |
|
1 |
unoccupied period |
“DHW_TempSp” < SYS-01 |
2 |
occupied period - normal operation |
“DHW_TempSp” >= SYS-01 |
3 |
||
4 |
||
5 |
||
6 |
cooling down protection active |
“SysSupplyTemp” < “UpperTemp” + SST-01 |
7 |
DHWS priority request active |
DHW temperature control active and “SysSupplyTemp” < “UpperTemp” + SST-01 and “UpperTemp” < “CalcDHWTempSp” - SYS-04 |
8 |
heat override function |
Input “OverheatProt” = 1 and SYS-02 <>0 |
9 |
system supply temperature setpoint failed |
“SysSupplyTemp” < “CalcDHWTempSp” in the time SST-02 since control start |
10 |
legionella protection function active |
This function is activated if all the conditions are true: - DHW is in un-occupied mode - there is no extended operation - input "LegionellaEnable" switches to "1". |
11 |
legionella protection function failed |
One of the DHW sensors (upper or lower) < LEG-01– UWT-01 after LEG-03 since legionella start |
12 |
maximum temperature limitation by max. thermostat |
alarm at the input “MaxThermostat” |