Daikin EKHWMX500CA [47/68] X errors malfunctions and messages

Daikin EKHWMXB300CA [47/68] X errors malfunctions and messages
8 x Errors, malfunctions and messages
Daikin Altherma M ECH
2
O
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
Installation and maintenance instructions
47
Heating does not warm
up enough
Water flow too low.
Check that all stop valves of the water circuit are
completely open.
Check that the water filter is dirty.
Check that the expansion tank is defective.
Completely vent the heating system and the internal
circulation pump.
On the controller (rotary switch position "Info"
),
check whether 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 reference manual for the
outdoor unit technician).
Target value range is too low.
Increase parameter [Heat-Slope].
Increase parameter [T vbh1 max].
Increase parameter [Max T-Flow].
Weather-dependent T-HS control active.
Check "HC Configuration" level settings of the param-
eters [T-Outside lim day], [Heat-Slope] and the
settings in rotary switch position "Set Temp Day"
.
Optional backup heater (EKBUxx) or alterna-
tive heater booster not cut in.
Check mains supply of the backup heater (EKBUxx).
Thermal contactor (STB) on the backup heater
(EKBUxx) has triggered. Unlock.
Check parameters [Function Heating Rod], [BUH s1
power] and [BUH s2 power].
Water volume in heating system too low
Check admission pressure in the expansion tank and
water pressure; if necessary, top up heating water and
adjust admission pressure (see chap. 7.4).
Hot water supply is taking too much of the out-
put of the heat pump.
Check parameter [Function Heating Rod] settings in
"Configuration" level, "Setup" sub-level.
Check parameter [Power DHW] settings in "Configu-
ration" level, "System Configuration" sub-level.
Hot water does not warm
up
Hot water preparation shut off (e.g. switching
time program is in the economy phase,
parameters for hot water preparation incor-
rectly set).
Check the operating mode setting.
Check the request parameters.
Storage tank charging temperature too low. Increase the target hot water temperature.
Draw-off rate too high. Reduce the draw-off rate, limit throughput.
Output of heat pump too low.
Check the switching times for room heating and hot
water supply for overlaps.
Water volume in heating system too low.
Check admission pressure in the expansion tank and
water pressure; if necessary, top up heating water and
adjust admission pressure (see chap. 7.4).
Optional backup heater (EKBUxx) or alterna-
tive heater booster not cut in.
Check mains supply of the backup heater (EKBUxx).
Thermal contactor (STB) on the backup heater
(EKBUxx) has triggered. Unlock.
Check parameters [Function Heating Rod], [BUH s1
power] and [BUH s2 power].
Malfunction Possible cause Possible solution

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