HTW SR24 Manuel De L'utilisateur Et D'installation page 53

6.4 Error phenomenon shooting
Error phenomenon
Display does not light up/water is cold.
No hot water coming out.
Water in safety valve relief port flow
out of the pressure relief port of the
safety valve.
It takes a long time to heat a tank of water.
Automatic operation or shutdown.
It do not work.
The heating effect is not obvious.
Compressor does not run after power on.
Display of water temperature Slow rise.
Shows that the water temperature is
heating decreases during the
heating process.
The water temperature is displayed as
dropping. Low and no heating.
The display shows that the water
temperature will Suddenly, the water
temperature will drop a lot.
It shows that the temperature of the water
is lowered a lot. But it's still hot water.
Displayed water temperature and set
water temperature difference.
During the heating process the
compressor will not stop running and the
fan machine stops.
Safety valve running water.
Check that the air switch is closed/set the temperature high.
Check that the tap line is clear; check that the tap water pressure is not too low.
If there is only a small amount of water flow out, for the water thermal expansion caused by the normal
phenomenon, do not block; if a large amount of water flow out, please replace the safety valve. Please
replace the safety valve.
● When the ambient temperature is low, the heating speed of the unit is reduced, which is a normal
phenomenon, please heat up in advance.
● Check whether the electric heating is running normally, check whether the set mode is air conditioning +
hot water production at the same time on mode, at the same time on mode under the slower rate
of warming.
Is it because the reservation/timer function is set.
Is the air switch not closed. ●Is the fuse blown. ● Whether the reservation/timer function is set.
● Whether it is caused by the protection of the unit (the corresponding protection code will be displayed)
● Whether the water temperature is high and has not reached the conditions for the unit to turn on.
Whether the air inlet and outlet of the unit are blocked.
● There is hot water in the tank and it can be used.
● When the power switch is turned on, the hot water dispenser will not run for about 3 minutes after the
operation stops, because the compressor cannot be started within 3 minutes of stopping.
● The water heater cannot run for about 3 minutes after running stops when the power switch is turned on.
Because the upper part of the tank water temperature is higher, the middle and lower part of the water
temperature is lower, need to wait until the whole tank water temperature is basically the same, show the water
temperature will rise faster. When the temperature of the water in the whole tank is basically the same, the
temperature of the water will rise faster.
When the temperature of the upper part of the tank is much higher than the lower part of the water temperature,
due to the natural convection of hot and cold water in the heating process, it will make the Hot and cold water
will be stirred and mixed to a certain extent, and the temperature of the upper hot water will be slightly reduced,
or the unit may slightly reduce the temperature when the defrosting action is performed. The temperature of the
upper hot water will be slightly reduced, or when the unit is defrosting, the display temperature may also be
slightly reduced.
Due to natural heat dissipation, the temperature of the hot water in the tank will gradually decrease when it is
not used for a long time. In order to avoid host too often turn on and stop, the host has made a provision for
water temperature, non-water use, when the display of the water temperature is reduced by In case of
non-water use, the heating of the mainframe will be turned on only when the water temperature is lower than
the set return temperature (the return value can be set through the line controller).
Since the unit is built-in pressurized water tank, when using hot water, cold water needs to enter the tank to top
off the hot water, and there will be obvious stratification between the hot and cold water. There will be obvious
stratification between the hot and cold water, when the cold water overflows the temperature sensor on the
upper part of the tank, the water temperature will be suddenly reduced. When the cold water overflows the
temperature sensor on the upper part of the tank, the water temperature will be suddenly lowered, which is a
natural phenomenon of the high utilization rate of the unit's water tank.
The upper part of the water tank temperature sensor is placed in the upper 1/4 of the water tank, and the
display of the water temperature is the temperature of the upper part of the water tank temperature sensor.
When the water is being used and the displayed water temperature is suddenly lowered, there is still almost
1/5 of the tank's hot water available for use. When the water is being used, there is still almost 1/5 tank of hot
water in the tank after the display water temperature drops suddenly.
● Whether to set the reservation function, the unit will be heated up in advance when reservation is made, and
the display temperature will be slightly decreased due to natural heat dissipation, which is a normal
phenomenon. Due to natural heat dissipation, the display temperature will drop slightly, which is a
normal phenomenon.
● Whether the unit is protected.
When the ambient temperature is low, the evaporator may be frosted resulting in poor heat transfer, at this time
the host will be defrosting operation. The compressor will be running when defrosting, and the fan will
stop running.
As the water tank itself is a closed pressurized container, when heated, the water is subjected to thermal
expansion. When the pressure inside the tank is greater than 0.85MPa, the pressure relief port of the safety
valve will act to flow out hot water, thus protecting the tank from pressure damage or even explosion.
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Possible reason & Solution