20
125 TSHWTop Short T21 Temperature sensor in SHW shortcir-
cuited.
Check cable and connectors.
Measure the resistance in the temperature
sensor.
126 TSHWAnode After the anode signal has been within the
approved range, the signal is now outside
the expected range.
This may be due to an open or short-cir-
cuited connection or due to a change in the
resistance value in the anode as a result of
corrosion.
If the database parameter HotWa-
ter.AnodeState has a value of 2, the anode
may need to be replaced due to corrosion
127 TPresTube Open T35 Temprerature sensor Pressure open
connection.
Check cable and connectors.
Measure the resistance in the temperature
sensor.
128 TPresTube Short T35 Temperature sensor Pressure short-
circuited.
Check cable and connectors.
Measure the resistance in the temperature
sensor.
600 HighPres High pressure switch active. Check hot side pump/overflow valve on
high temperature side. Check if there is air
in the hot side water. Check if filter is
blocked on the hot side.
The unit restarts when the pressure drops
below high pressure switch lowlimit again.
After 3rd cut-out the alarm must be
acknowledged to start the unit again.
601 LowPres Low pressure switch active. Check refrigerant charge, expansion valve
and evaporator for ice. Check fan for
obstacles on an air to water evaporator.
The alarm must be acknowledged to start
the unit again.
603 HighPresRep High pressure switch repeatedly active
more than 3 times
Check hot side pump/overflow valve on
high temperature side.
The alarm must be acknowledged to start
the unit again.
604 FrostProt Frost protection has been activated Heat pump and electrical heater running
full capacity.
Check that setting are not turned off.
607 LegioFail The anti-legionella function failed. The
desired temperature could not be reached
within the set time limit.
Check the electric heating element and the
heat supply from the heat pump.
608 FCalarm FC alarm relays has been activated Check electrical connecton and power to
the inverter.
Check if the compressor is running.
609 FCalarmRep FC alarm relays has been activated repeat-
edly.
Check electrical connection and power to
the inverter.
Check if the compressor is running.
610 Tevap Low Evaporator temperature too low. Brine circuit has low capacity.
Risk of frost damage to the brine circuit.
611 TevapLowRep Evaporator temperature too low. Compressor stopped due to too low brine
temperature.
Compressor stopped to prevent frost dam-
age.
615 ElHeater 8 hours (or more) with electric heating ele-
ment.
Electric heating has been active, without
interruption, for 8 hours or more.
Check the connection of the electric ele-
ment. Check also that heating is otherwise
possible and
that it is not lessened by other / unneces-
sary cooling.
630 HPstopAmb The compressor has stopped due to a high
outdoor temperature.
The alarm is automatically reset and the
system resumes normal mode when the
temperature falls below the set tempera-
ture limit again.
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