Instructions / Assembly

OPERATION
Maintenance and care
www.stiebel-eltron-usa.com Accelera® 220-300 E | 17
ENGLISH
Press the "Plus" and "Minus" keys simul-
taneously for five seconds.
The "heat pump" and "electric emergen-
cy/booster heater" symbols appear.
5.6 Emergency shutdown
In the event of an emergency, carry out the following steps:
f Interrupt the power supply by unplugging the appliance or by
shutting off the circuit breaker.
f Shut off the cold water supply.
f Immediately notify a qualified contractor, as the appliance
is not protected against corrosion while the power supply is
interrupted.
f Drain the water out of the tank if there is a power outage
longer than 2 days.
6. Maintenance and care
WARNING Electrocution
Do not insert objects through the grille into the interior
of the appliance.
Never spray the appliance with water.
Never spray water into the appliance.
!
WARNING Injury
Maintenance work, such as checking the electrical safe-
ty, must only be carried out by a qualified contractor.
Appliance
components
Care and maintenance tips
Casing Use a damp cloth to clean the casing sections. Never
use abrasive or corrosive cleaning agents.
Air intake grille / air
discharge grille
Clean the air intake grille and air discharge grille
every six months. Cobwebs or other kinds of contami-
nation can restrict the air supply to the appliance.
DHW tank The DHW tank is equipped with a maintenance-free
impressed current anode to safeguard against cor-
rosion. The power supply must not be interrupted
while the appliance is filled with water to enable the
impressed current anode to provide protection. Oth-
erwise there is a risk of corrosion.
Electric booster ele-
ment
Have the electric booster element descaled from time
to time. This will extend the expected life of the elec-
tric booster element.
Appliance Have the safety assembly and the evaporator checked
regularly by a qualified contractor.
Condensate drain Undo the condensate drain. Check that the condensate
drain is clear and remove any dirt from the conden-
sate drain connection of the appliance.
7. Troubleshooting
Problem Cause Remedy
No hot water is
available.
No 220–240 V power to
the appliance.
Check that the appliance is
connected to the 220–240 V
power supply.
The circuit breaker in the
electric panel has tripped.
Check whether the circuit
breaker in the electrical panel
has tripped. If required, dis-
connect the appliance from
the power supply and replace
the circuit breaker. Contact
your contractor if the circuit
breaker blows again after the
appliance is connected to the
power supply.
The air intake or air dis-
charge of the appliance is
blocked.
Check the air intake grille
and air discharge grille for
contamination. Remove
any contamination (See 16,
“Maintenance and cleaning”,
pg. 29). Check thermostat
setting.
The ambient temperature
exceeds the upper ap-
plication limit (See 17.3,
“Data table”, pg. 35).
The appliance safety
equipment has responded
and the appliance has
switched off automati-
cally.
Wait for the appliance to cool
down. Call a qualified con-
tractor if the appliance does
not switch back on automat-
ically.
The ambient temperature
falls below the lower ap-
plication limit (See 17.3,
“Data table”, pg. 35).
The evaporator is current-
ly being defrosted.
Wait until the appliance
switches back on automati-
cally.
The appliance is
not heating the
DHW tank although
the heat pump
symbol is illumi-
nated.
The blocking time for
compressor has not
yet elapsed. Once the
compressor has been
switched off, it will only
be switched back on
again after the 20minute
compressor blocking time
has elapsed.
No action required.
The safety valve
of the cold water
supply line is drip-
ping.
These units are under
water mains pressure.
During the heat-up pro-
cess, expansion water will
drip from the safety valve.
Ensure that adequate
expansion volume was in-
stalled in the DHW loop.
Notify a qualified contractor if
water continues to drip when
heating is completed. Check
the sealing of the P&T valve if
a sand filter is used. If expan-
sion volume is too small, in-
stall a larger expansion tank.
The condensate
drain drips.
The surface temperature
of the evaporator is lower
than the dew point tem-
perature of the ambient
air. Condensate forms.
The amount of condensate
depends on the air humidity
level.
The room tem-
perature drops too
low.
Due to the heat pump
process the room tem-
perature drops.
The temperature drop de-
pends on the hot water
demand and the size of the
installation room. If the
temperature drop of the in-
stallation room is more than
7 °F (4 °C) check the size of the
installation room.