30
Electric Tankless Instant Water Heater -
Installation Manual and User Guide
EN
Troubleshooting
7. Troubleshooting
First aid
• Check the leakage protection switch and the fuses�
• Check if any fittings or shower head are affected by the build-up of lime scale or dirt�
• See also „Troubleshooting by users“�
Troubleshooting by users
Problem
Cause
Solution
Water heater is not heating at all (wa-
ter is flowing but the unit is not heat-
ing - the outgoing water temperature
is the same as the cold water supply)
- the digital display does NOT light
up�
No power or incorrect wiring�
Make sure the breakers at main
electrical panel are ON� You may
have a faulty breaker or unit
may be wired incorrectly�
Water heater is not heating at all (wa-
ter is flowing but the unit is not heat-
ing - the outgoing water temperature
is the same as the cold-water supply)
The digital display DOES light up, but
no temperature display�
Flow rate is too low / water
pressure is too low�
Your water heater has an activa-
tion flow rate of approximately
2�2L/min / 2�5L/min� If your
water flow rate is less than this
level, your unit will not activate�
Increase the flow rate or check
the filter mat inside the inlet
connector�
The air bubbles in the water
heater have not been purged
out�
Make sure the breakers at main
electrical panel are ON, turn on
the unit and open the hot water
tap for about 20s�
Flow sensor blocked by
contamination
Uninstall and clean the flow sen-
sor�
Connector between flow
sensor and main board was
loosen
Unplug and replug the connector
between flow sensor and main
board
Flow rate is too low
Something was blocked in
the filter mat / Pipe was
blocked
Check and clean the filter mat
inside the inlet connector�
Water heater is not heating at all� The
LCD display shows “E2”
Internal part failure
Please call for your local service�
