User Manual

24
Marey Electric Tankless Water Heater by Wahlbach
25
EN EN
Troubleshooting
Troubleshooting
Marey Electric Tankless Water Heater by Wahlbach
6. 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 (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 incor-
rect 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-wa-
ter 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 activation flow rate of
approximately 0.58GP-
M/0.66GPM. 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 rate is too low
Something was
blocked in the fil-
ter mat / Pipe was
blocked
Check and clean the filter
mat inside the inlet con-
nector.
Water heater is not heat-
ing at all. The LCD display
shows “E2”
Internal part failure
Please call for your local
service.
Troubleshooting by users
Problem Cause Solution
Water heater is heating, but
the water temperature is
not hot enough.
User temperature
setting too low.
Increase the temperature
setting on the unit.
Flow rate is too high.
Depending on your in-
coming water temperature
and the kW of your heater,
your water flow rate may
exceed the physical heat-
ing capacity of your water
heater. Reduce the flow
rate by installing a Flow
Regulator.
Crossed wires.
If it’s a new installation,
have your electrician
double check the wiring. Is
possible that the wiring is
incorrect.
Voltage less than 240
volts.
The heating elements
on your water heater are
design for 240 volts. When
used with a lower voltage,
they produce less heating
power. You may need to
upgrade to a larger input
heater.
Mixing too much
cold water.
You do not need to mix as
much cold water with your
tankless water heater com-
pared to when you use a
conventional water heat-
er. You may also have an
anti-scald feature on your
faucet that is mixing cold
water. These types of fau-
cets can usually be adjust-
ed to reduce the amount of
cold water mixed.