Airwell AWHM-TDF 190 Manuel D'installation, D'utilisation Et D'entretien page 101

10 - CONTROL
10.9 NON-ERROR TIPS
Q: Why compressor can't start immediately after setting?
A: Unit will wait for 3 min to balance the pressure of system before start compressor again, it's a self protection logic of unit.
Q: Why sometimes the temperature shown on the display panel decreased while unit is running?
A: R. When hot water is sampled, it is mixed with cold water which is added from the low part of the accumulator.
Q:Why sometimes the temperature shown on the display decreased but unit still keep closed?
A: To avoid unit ON/OFF frequently, unit will activate heat source only when bottom storage tank temperature is lower than setting
temperature for at least 5 ºC.
Q:Why sometimes the temperature shown on the display will decreased dramatically?
A: Because storage tank is pressure-bearable type, if there is massive hot demand, hot water will quickly tapped out from upper part of
storage 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.
Q: Why sometimes the temperature shown on the display is decreased a lot, but there is still a mount of hot water can be tapped?
A: Because the upper water sensor is located on the upper 1/4 storage tank, when tapping hot water out, it means there is at least 1/4
storage tank of hot water available.
Q: Why sometimes unit shows "LA" on display ?
A: The heat pump available running externalrange is -7 ~ 43°C, if externaltemperature is out of range, system will show
abovementioned signal to let user notice it.
Q: Why something there is nothing shown on the display?
A: To maintain display screen lifespan within along term, when there is no button operation for 30 sec, it will extinguish the display
except the LED indicator.
Q: Why sometimes the buttons are unavailable?
A: If there is no operation on panel for 1 min, unit will lock the panel, shows " ", to unlock the panel, please press the "Enter" button
for 3 seconds.
Q: Why sometimes there is some water flowed from drainage pipe of saftey valve?
A: Because the storage tank is pressure-bearable one, when water is heated inside the storage tank, water will expand, so the
pressure inside of tank will increase, if pressure goes up more than 7Bar (0,7Mpa), saftey valve will activate to relief the pressure and
hot water drop will be discharged correspondingly. If water drop is continually discharged from saftey valve drainage pipe, it is
abnormal, please contact qualified stuff to repair.
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