5
3. MoDES
3.1. oN/oFF
When the heating is in off mode the pump can still start either for freeze protection or for the anti-seize cycles.
if any of the off inputs are switch off then the unit will be in off mode as described below.
No hot water heating
With domestic hot water
Display oFF
heating off
heating & dhW oFF
on/off input DI9
heating off
heating & dhW oFF
Room terminal off
heating off
heating oFF
dhW on
the display will show "off" if the heating is off
note that if domestic hot water is active the unit will automatically switch back on when water heating is required
if off mode is selected on the room terminal.
3.2. DRY CoNtACt INPUtS
note that the state of the inputs can be monitored using the i-o menu and di sub menu. the condition is 0 =
input open and 1= input closed.
3.2.1. oN/oFF DRY CoNtACt INPUtS DI9
the default setting uses this input as a global off mode when the input is closed.
it is possible to inverse the input logic using the parameter h30.
²
if h30 = "inv" (default) then when the input is closed the unit is off
²
if h30 = "dir" then when the input is open the unit is off.
When the parameter h29 = ls then the di9 input is used for the load shedding and cannot be used as an on/
off input.
3.2.2. LoAD SHEDDING DRY CoNtACt INPUt DI9
only used when h29 = 29 and h10 = 0 (configured for electric heaters)
When the input is on then the electric heaters remain off. only heating by compressor heat is possible. note that
this input does not disable the domestic hot water electric heater.
the input logic can be reversed using parameter h30 as above.
3.2.3. EJP INPUt DI8
this input is used to stop electricity consumption for customers equipped with peak rate electricity meters. When
the input is on then all electric heaters and compressor heat are switched off. dWh domestic hot water heating is
not possible. heating is done by the boiler when a boiler relief configuration is used.
the parameter h25 can be used to inverse the input.
²
if h25 = "dir" (default setting) then when the input is closed the eJP mode is on.
²
if h25 = "inv" then when the input is closed eJP is off and normal heating is allowed.
When eJP mode is active "eJP" is displayed as the default display.
