Cool Energy EcoStore Heat Pump Water Heater
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P a g e
When the ambient temp T4 is out of
Heat Pump running range (-7~43 °C )
Heat Pump will stop, unit will show LA
LA
on the position of clock on display until
T4 back to (-7~ 43 °C ).
Only valid for the unit without e-heater.
Unit with e-heater will never show "LA".
It is normal, and no necessary to repair.
CAUTION:
U
The diagnostic codes listed above are the most common. If a diagnostic code not
U
U
listed above is displayed, contact residential technical assistance referencing the number on
U
the front of this manual.
4.10 FAQ
D. Why compressor can't start immediately after setting?
R. Unit will wait for 3 min to balance the pressure of system before start compressor again, it's a self-
protection logic of unit.
D. Why sometimes the temperature shown on the display panel decreased while unit is running?
R. When the upper tank temperature is much higher than the bottom part, upper part hot water will
be mixed by the bottom cold water which is continually flow from inlet tap water so that will
decrease the upper part temperature.
D. Why sometimes the temperature shown on the display decreased but unit still keep closed?
R. To avoid unit ON/OFF frequently, unit will activate heat source only when bottom tank
temperature is lower than setting temperature for at least 5 ºC.
D. Why sometimes the temperature shown on the display will decreased dramatically?
R. Because tank is pressure-bearable type, if there is massive hot demand, hot water will quickly
tapped out from upper part of tank as well as cold water will quickly tapped into bottom part of bank,
if the cold water surface emerge the upper temperature sensor, temperature shown on the display
will decreased dramatically.
D. Why sometimes unit shows "LA" on display?
R. The heat pump available running ambient range is -7÷43°C, if ambient temperature is out of range,
system will show abovementioned signal to let user notice it.
Q. Why does the display sometimes show nothing?
A. To preserve the life of the display. After no button press for 30 sec the display will turn off.
D. Why something there is nothing shown on the display?
R. If there is no operation on panel for 1 min, unit will lock the panel, shows
.
To unlock the panel,
please press the
button for 3 seconds.
