9
●
Check the power plug and outlet as often as possible. Secure electrical contact and also proper
grounding must be provided. The plug and outlet must not heat excessively.
If the heater is not used for a long time, especially in regions with low air temperature(below 0℃),
it is nessary to drain water from the heater to prevent damage of the water heater, due to water
freezing in the internal tank.(Refer Cautions in this manual for the method to drain away the water
from the inner container).
To ensure long reliable water heater operation, it is recommended to regularly clean the internal
tank and remove deposits on the electric heating element of the water heater, as well as check
condition (fully decomposed or not) of the magnesium anode and, if necessary, replace it with a
new one in case of full decomposition.Tank cleaning frequency depends on hardness of water
located in this territory. Cleaning must be performed by special maintenance services. You can
ask the seller for address of the nearest service center.
●
●
●
WARNING
Before doing any maintenance, please cut off the power supply.
!
The water heater is equipped with a thermal switch, which cuts off power supply of the heating element
upon water overheating or its absence in the water heater. If the water heater is connected to the mains,
but water is not heated and the indicator doesn’t light up, then the thermal switch was switched off or not
switched on. To reset the water heater to the operating condition, it is necessary to:
1. De-energize the water heater, remove the plate of the side/lower cover.
2. Press the button, located at the center of the thermal switch, see Fig.6;
3. If the button is not pressed and there is no clicking, then you should wait until the thermal switch
cools down to the initial temperature.
●
●
●
In case of dry burning fault, overtemperature fault, sensor open circuit or short circuit fault, the nixie
tube on the display screen flashes E2, E3 and E4 respectively, and other nixie tubes and indicators
do not display. If there is a buzzer, it is accompanied by 6 short beeps. At this time, all relays are
disconnected and all keys do not work. After the fault is removed and powered on again, the water
heater returns to shutdown state. In the power on state, the system will automatically perform self
inspection. If there is a fault, the corresponding fault code will be displayed, and the system cannot
work (i.e. the water heater cannot be started).
Judgment of dry burning fault: when starting heating each time, heat it for 30 seconds. After 120
seconds, if the temperature rise is less than 4 degrees, heat it normally, and no dry burning will
be judged within 30 minutes; If the temperature rises by 4 degrees or more, stop heating, wait for
150 seconds and repeat the previous process. It is judged as dry burning if the temperature rises
by 4 degrees or more for three consecutive times, and the display flashes with the fault code
"E2".
Overtemperature fault determination: when the temperature of the tank temperature sensor
exceeds 90 ℃, it is determined as overtemperature, and the display screen flashes and displays
the fault code "E3".
Sensor fault determination: alarm when the sensor is open circuit or short circuit, and the fault
code "E4" flashes on the display screen.
4.2 Alarm and fault self-test
5. MAINTENANCE
To Next Page
Loading...
Need help?
General
