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