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7 Troubleshooting
7
Troubleshooting
Cut off the power before checking the internal faults of water heater
If the users fail to complete troubleshooting, please contact maintenance personnel timely.
Fault phenomenon
The water is too hot
The water is too cold
The screen display is dark
Water flows；Power off
No water at tapping point
E1
E2
E5
E7
Table 7.1 Common fault analysis and troubleshooting
8
Recycling and disposal
▶ The competent person who installed your product is re-sponsible for the disposal of the packaging.
If the product is identified with this symbol:
▶ In this case, do not dispose of the product with the household waste.
▶ Instead, hand in the product to a collection centre for old electrical or electronic appliances.
If the product contains batteries that are marked with this symbol, these batteries may contain substances that are
hazardous to human health and the environment.
▶ In this case, dispose of the batteries at a collection point for batteries.
9
Guarantee and customer service
9�1
Guarantee
For information on the manufacturer's guarantee, you can write to the contact address that is provided on the back page.
9�2
Customer service
For information on the manufacturer's guarantee, you can write to the contact address that is provided on the back page.
10
Possible reasons
Water flow through the water
heater is small; tap water
temperature rises; select to heat
tap water .
Excessive water flow or low
temperature of tap water.
When the water flow is too low,
the water heater does not start.
Voltage is instable or lower than
the required product voltage.
The water heater is off.
Power supply problem.
The water heater not start when
the water flow is too low.
Internal components do not work
or are damaged.
Air-break switch trips or circuit not
connected.
No water supply.
Tap clogged.
Water heater is clogged.
Outlet water temperature sensors
short circuit or open circuit.
Inlet water temperature sensor
short circuit or open circuit.
Overheating sensor short circuit
or open circuit.
Medium detection short circuit or
open circuit.
Water resistance too high.
Troubleshooting measures
Increase the inlet water volume; lower heating power to the suitable
water temperature.
Decrease the inlet water volume or Increase the powe.
If the water volume is inadequate, close the other water sources or add
booster pump.
Check the voltage by the professionals.
Press on/off button to turn on the appliance.
Check power switch and circuit.
Check whether the water volume is adequate, if additional water
pressure is needed, close the other water sources or add a booster
pump to increase the water pressure.
Check by the professionals.
Check air-break switch.
Check water supply.
Clean shower head water outlet holes.
Contact a professional.
Check outlet water temperature sensor by a professional.
Check the inlet water temperature sensor by a professional.
Check by a professional.
Contact a professional to check appliance and installation.
eletronicVED pro series
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