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In vacation period, the setting target water
temperature is 15 as default and will show
the remanent vacation days. On the last day of
vacation, unit will automatically start disinfect
function, and automatically reset the target
temperature to the last one before vacation.
If unit has already been in vacation or OFF, press
w will lead to show invalid icon on the
display.
14
Installation & Owner's Manual
5.3 Combination button
5.4 Auto-restart
5.5 Button Auto Lock
Icon DescriptionNo
No. Icon Description
Clear
error
code
Query
+
Press the two buttons at
the same time to clear
all stored error & protect
codes, and the buzzer
will buzz one time.
Press the two buttons at
the same time for 1sec to
go into querying. Under
querying user can check
unit setting & running
parameters by pressing
circularly. Press
button for 1s or no button
operation for 30s,
then quit querying.
If electricity power failed, unit can memorize all setting parameters,
unit will be back to the previous setting when power recover.
When there is no operation of button for 1 minute, button will be
locked except Unlock button , Press for 3s, unlock
buttons.
5.6 Screen Auto Lock
If there is no operation of button for 30s, screen will be locked(extinguished)
except for error code and alarm light.
Press any button will unlock the screen(lighten).
9
+
6.2 Something about self-protection of unit
6.3 When Error happened
When the self-protection activates, the system will be stopped
and start a self-check, and restart when the error is resolved.
When the self-protection activates, the buzzer will buzz every
second minute, the will flash and error code will be shown at
water temperature indicator. Press button for 1sec to stop
buzz, but the and error code does not disappear until the error
is resolved.
In the following circumstance, self-protection may happen:
If air inlet or outlet is blocked;
If the evaporator is covered with too much dust;
Incorrect power supply(exceeding the range of 220-240V).
Q:
Why is the temperature shown on the display sometimes
decreased but unit still keep off?
A: 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.
Q:Why is the temperature shown on the display sometimes will
decrease dramatically?
A: It is because tank is pressure-bearable type, if there is massive hot
water demand, hot water will quickly tapped out from upper part of
tank at the same time cold water will quickly tapped into bottom
part of bank.The cold water flows to the upper temperature sensor,
the temperature shown on the display will decreased dramatically.
Q: Why is the temperature shown on the display sometime decrease
a lot, but there is still a mount of hot water can be tapped?
A: This is because the upper water sensor is located on the upper 1/4
tank, when tapping hot water out, it means there is at least 1/4 tank
of hot water available.
Q: Why is unit shown the icon "LA" on display ?
A: The heat pump available running ambient range is from -7 to 43℃,if
ambient temperature is out of the range, system will show
above-mentioned signal to let user notice it.
Q: Why is there 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 extinguwish the display
except the LED indicator.
Q: Why are the buttons unavailable sometimes?
A: If there is no operation on panel for 1 min, unit will lock the panel,
shows " ", to unlock the panel, please press the "ENTEF" button
for 3 seconds.
Q: Why is there some water flowed from drainage pipe of PTR valve?
A: It is because the tank is pressure-bearable one, when water is
heated inside the tank, it will expand. So the pressure inside of
tank will increase. If pressure goes up more than 1.0MPa, PTR
valve will activate to release the pressure and discharge hot water
correspondingly. If water is continually discharged from PTR valve
drainage pipe, it is abnormal. Please contact authorised technician
to check.
6. TROUBLE SHOOTING
6.1 Non-error tips
Q: Why can't compressor 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 is the temperature shown on the display panel sometimes
decreased while unit is running?
A: 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 flows from inlet tap water, so that will decrease the upper
part temperature.
1)
2)
3)
If some cases at error happen, unit will automatically shift to
E-heater for emergent SHW supply, please contact authorised
technician staff to repair.
If case of serious errors the unit will not start, please contact
authorised technician to repair.
If some errors, the buzzer will buzz 3 times every minute and the
will flash fast. Press for 1 sec to stop the buzzer but
the alarm icon will keep flashing.
1)
2)
3)
17


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