Daikin Altherma EHSX04P50D Installations- Und Wartungsanleitung Seite 43

Malfunction
Heating does not warm Water flow too low.
up enough
Target value range is too low.
Weather-dependent inflow temperature control act-
ive.
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 time
warm up program is in the economy phase, parameters 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 EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN
Possible cause
8 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 circula-
tion pump.
▪ On the controller ("Info" menu), check that sufficient water
pressure (> 0.5 bar) is available; if necessary, top up heating
water.
▪ Check that the resistance in the water circuit is not too high
for the pump (see Chap. 10).
In [→ Main menu → Configuration → Heating]:
▪ Increase the [Heat-Slope ] parameter.
▪ Increase the [HZU max. temperature ] parameter.
▪ Increase the [Max. inflow temperature] parameter.
▪ Check the [Heating operation limit], [Heat-Slope] 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. of external heat source], [Ext. power level
1] and [Ext. power level 2] parameters [→ Main menu → Set-
tings → Ext. Source].
▪ Check the admission pressure in the expansion tank and wa-
ter pressure; if necessary, top up the heating water and adjust
the admission pressure (see Chap.
▪ Check the settings of the [Config. of external heat source]
parameter [→ Main menu → Settings → Ext. Source].
▪ Check the settings of the [Ext. hot water power] parameter
[→ 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 wa-
ter 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. of external heat source], [Ext. power level
1] and [Ext. power level 2] parameters [→ Main menu → Set-
tings → Ext. Source].
Installation and maintenance instructions
7.2.2).
41