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29.2.1 Heat pump operating mode
Display shows
ODU test
Test
Antifreeze HC
Antifreeze DHW
DFL low
Defrost mode
Antilegion.
DHW mode
DHW run-on
Heating mode
Heating run-on
Active cooling
Cascade
BMS
Standby
Pump down
29.2.2 Heat pump status
Display shows
Fault
Disabled
Standby
Pre-flush
ON
Defrost mode
Post-flush
Blocking time
Power-OFF
OT shutdown
FL/RT > max.
Active cooling
Spply air<min
TPW / Max. Th
3064298_201507
29. Operating the AM display module
Meaning
Outdoor unit test
Relay test active (IDU)
Heat pump frost protection function, heating circuit temperature below
frost protection limit (T_boiler, T_return, T_header)
Heat pump frost protection function, DHW cylinder temperature below
frost protection limit
Blocking of heat pump / electric heating until the flow rate is back within
valid limits
Defrost function of ODU
Heating of DHW cylinder to 65 °C
DHW heating with cylinder, cylinder sensor temperature is below the
set value
Heat source switched off, ZHP runs on
At least one heating circuit is demanding heat
Heat source switched off, ZHP runs on
Cooling mode active
Cascade module in system active
Heat pump is controlled by the building management system
No heating or DHW demand
Refrigerant circuit drain function
Meaning
There is a fault in the heat pump
Heat pump has been disabled via parameters
No demand
Sensors are brought to the same temperature level without heat source.
Flow sensor is exposed to flow.
Heat pump in control mode
Heat pump in defrost mode
ZHP runs on without a heat source
A blocking time is present for the heat pump
The heat pump is blocked by the power supply utility / via PSU contact
Operation of heat pump no longer appropriate, outside temperature shutdown
Heat pump can no longer meet the heat demand, application limit reached
Heat pump in cooling mode
Supply air temperature is below the minimum level
Dew point monitor or maximum thermostat has responded
51
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