Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur Seite 37

Fault
Heating does not warm Water flow too low.
up enough
Target value range is too low.
Weather-dependent inflow temperature control
active.
Optional backup heater (EKBUxx) or alternative
heater booster not cut in.
Water volume in heating system too low
Hot water supply is taking too much of the output
of the heat pump.
Hot water does not Hot water preparation shut off (e.g. switching
warm up time program is in the economy phase, paramet-
ers for hot water preparation incorrectly set).
Storage tank charging temperature too low.
Draw-off rate too high.
Output of heat pump too low.
Water volume in heating system too low.
Optional backup heater (EKBUxx) or alternative
heater booster not cut in.
Daikin Altherma ETS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1447299_00 – 06/2019 – EN
Possible cause
7 Faults and malfunctions
Possible solution
▪ Check that all stop valves of the water circuit are fully open.
▪ Check that the water filter is dirty.
▪ Check if the expansion tank is defective.
▪ Completely vent the heating system and the internal circulation
pump.
▪ On the controller ("Information" menu), check that sufficient water
pressure (> 0.5 bar) is available; if necessary, top up the heating
water.
▪ Check that the resistance in the water circuit is not too high for
the pump (see Technical data).
In [→ Main menu → Configuration → Heating]:
▪ Increase parameter [Heating curve].
▪ Increase parameter [Heating support max. temp.].
▪ Increase parameter [Max. feed temperature].
▪ Check the [Heat limit, heating mode], [Heating curve] parameters
in [→ Main menu → Configuration → Heating].
▪ Check mains supply of the backup heater (EKBUxx).
▪ Thermal contactor (STB) on the backup heater (EKBUxx) has
triggered. Unlock.
▪ Check the [Config. ext. heat source], [External power stage 1]
and [External power stage 2] parameters [→ Main menu → Set-
tings → Ext. source].
▪ Check the admission pressure in the expansion tank and water
pressure; if necessary, top up the heating water and adjust the
admission pressure (see Chap.
▪ Check the settings of the [Config. ext. heat source] parameters
[→ Main menu → Settings → Ext. source].
▪ Check the settings of the [External power hot water] parameters
[→ Main menu → Settings → Ext. source].
▪ Check the operating mode setting.
▪ Check the request parameters.
▪ Increase the target hot water temperature.
▪ Reduce the draw-off rate, limit throughput.
▪ Check the switching times for room heating and hot water supply
for overlaps.
▪ Check the admission pressure in the expansion tank and water
pressure; if necessary, top up the heating water and adjust the
admission pressure.
▪ Check mains supply of the backup heater (EKBUxx).
▪ Thermal contactor (STB) on the backup heater (EKBUxx) has
triggered. Unlock.
▪ Check the [Config. ext. heat source], [External power stage 1]
and [External power stage 2] parameters [→ Main menu → Set-
tings → Ext. source].
3.8.4).
Installer reference guide
37