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22
Electric tankless water heater - Installation Maunal and User Guide
TM
Trouble shooting
First aid
• Check the fuses / breakers.
• Check if any fittings or shower head are affected by the build-up of
limescale or dirt.
• See also “Troubleshooting”.
Troubleshooting
Problem
Cause
Solution
Water heater is not heating at
all (water is flowing but the
unit is not heating - 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 (water is flowing but the
unit is not heating - the
outgoing water temperature
is the same as the cold water
supply) The digital display
DOES light up.
Flow rate is too
low / water
pressure is too
low.
Your water heater has an
activation flow rate of
approximately 0.6 GPM (2.5
LPM). If your water flow rate is
less than this level, your unit will
not activate. Increase the flow
rate.
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.
The pressure
switch was OFF
If it is the first time using the
appliance, please reset the
pressure switch as steps shown
in Fig. A9 of page. 9.
Water heater is not heating at
all. The LCD display shows
“E2”
Internal part
failure
Please call for your local service.
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