Troubleshooting - STIEBEL ELTRON accelera 220 e Operation And Installation Manual

OPERATION

Troubleshooting

7. Troubleshooting
Problem Cause
No hot water is No 220-240 V power to
available. the appliance.
The circuit breaker in the
electric panel has tripped.
The air intake or air dis-
charge of the appliance is
blocked.
The ambient temperature
exceeds the upper ap-
plication limit (See 16.3,
"Data table", pg. 33).
The appliance safety
equipment has responded
and the appliance has
switched off automati-
cally.
The ambient temperature
falls below the lower ap-
plication limit (See 16.3,
"Data table", pg. 33).
The evaporator is current-
ly being defrosted.
The appliance is The blocking time for
not heating the compressor has not
DHW tank although yet elapsed. Once the
the heat pump compressor has been
symbol is illumi- switched off, it will only
nated. be switched back on
again after the 20 minute
compressor blocking time
has elapsed.
The safety valve These units are under
of the cold water water mains pressure.
supply line is drip- During the heat-up pro-
ping. cess, expansion water will
drip from the safety valve.
Ensure that adequate
expansion volume was in-
stalled in the DHW loop.
The condensate The surface temperature
drain drips. of the evaporator is lower
than the dew point tem-
perature of the ambient
air. Condensate forms.
The room tem- Due to the heat pump
perature drops too process the room tem-
low. perature drops.
16 | Accelera® 220-300 E
Remedy
Check that the appliance is
connected to the 220-240 V
power supply.
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.
Check the air intake grille
and air discharge grille for
contamination. Remove
any contamination (See 15,
"Maintenance and cleaning",
pg. 27). Check thermostat
setting.
Wait for the appliance to cool
down. Call a qualified con-
tractor if the appliance does
not switch back on automat-
ically.
Wait until the appliance
switches back on automati-
cally.
No action required.
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 amount of condensate
depends on the air humidity
level.
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.
Problem Cause
Service symbol See 7.1, "Fault codes",
is continuously pg. 17
illuminated.
Service symbol See 7.1, "Fault codes",
flashes and the pg. 17
water does not
heat up.
The heat pump The appliance is in defrost
symbol is mode.
illuminated but the
compressor is not
running. The fan is
running.
The "heat pump" There is a demand for
symbol is flashing. heat, but the compressor
is blocked from starting.
The "electric A temperature control-
emergency/ ler has switched off the
booster heater" "electric emergency/
symbol is flashing. booster heater" during
rapid heat-up.
Remedy
Notify a qualified contractor.
It is imperative that you notify
a qualified contractor.
No action required.
No action required. The
compressor is blocked for 20
minutes from starting again
after it has been switched off
in normal operation. The com-
pressor switches itself on au-
tomatically after the 20 minute
blocking time has elapsed.
The symbol stops flashing au-
tomatically.
No action required. The ap-
pliance continues the rapid
heat-up process using the
heat pump. The symbol stops
flashing when the controller
releases the "electric emer-
gency/booster heater". The
symbol goes out when the
temperature throughout the
DHW cylinder reaches the set
temperature of 149 °F (65 °C).
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