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OPErATiON
Troubleshooting
6.
Troubleshooting
Problem
Cause
No hot water is
No power at the appliance. Check that the appliance is con-
available.
A fuse/MCB in the fuse box
has blown/tripped.
The air intake or air dis-
charge of the appliance is
blocked.
The ambient temperature
exceeds the upper applica-
tion limit (see the "Specifi-
cation / Data table" chap-
ter). The appliance safety
equipment has responded
and the appliance has
switched off automatically.
The ambient temperature
falls below the lower
application limit (see the
"Specification / Data table"
chapter). The evaporator is
being defrosted intermit-
tently.
The appliance output data
are calculated according to
standard, using the intake
temperature specified in
the data table. Below this
temperature the appliance
efficiency and output de-
crease. The heat-up time is
extended.
The appliance is
The compressor lockout
not heating the
time has not yet elapsed.
DHW cylinder,
Once the compressor has
although the
been switched off, it will
"heat pump"
only be switched back on
symbol is illumi-
again after the 20 minute
nated.
compressor lockout time
has elapsed.
The safety valve
The appliance is under
of the cold water
mains water pressure.
supply line is
During the heat-up pro-
dripping.
cess, expansion water will
drip from the safety valve.
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-
perature drops
too low.
High power con-
The lower the intake tem-
sumption
perature, the lower the heat
pump efficiency.
12
| SHP-A 220-300 Plus
remedy
nected to the power supply.
Check whether the fuses/MCBs
in your fuse box have blown/
tripped. If required, disconnect
the appliance from the power
supply and replace the fuses/
reset the MCBs. Contact your
qualified contractor if the fuse/
MCB blows/trips again after the
appliance is re-connected to
the power supply.
Check the air intake grille and
air discharge grille for dirt
accumulations. Remove any
dirt (see the "Maintenance and
care" chapter).
Wait for the appliance to cool
down. Call a qualified contrac-
tor if the appliance does not
restart automatically.
Wait until the appliance re-
starts automatically.
No action required.
Notify a qualified contractor if
water continues to drip when
heat-up has been completed.
The amount of condensate de-
pends on the humidity level of
the ambient air.
Operation of the appliance can
cause the room temperature
to fall by 1 to 3 °C. If the room
temperature falls by more than
5 °C, check the room size (see
the "Specification / Data table"
chapter). Increasing the room
size by opening a door to an-
other room will remedy this.
Avoid low intake temperatures
if at all possible.
Problem
Cause
Service/fault
See the "Fault codes"
symbol is per-
chapter.
manently on.
Service/fault
See the "Fault codes"
symbol flashes
chapter.
and the water
does not heat up.
Defrost symbol is
The appliance is in defrost
shown.
mode.
The heat pump
There is a heat demand,
symbol is flash-
but the compressor is
ing.
locked out.
The electric
A temperature controller
emergency/
has switched off the elec-
booster heater
tric emergency/booster
symbol is flash-
heater during rapid heat-
ing.
up.
The electric
The electric emergency/
emergency/
booster heater lights up
booster heater
when there is a demand.
symbol is illu-
The internal controller of
minated but the
the electric emergency/
electric emer-
booster heater may have
gency/booster
ended electric heating. A
heater is not
possible cause may be a
operational.
fault in the electric emer-
gency/booster heater. A
possible cause may be that
the high limit safety cut-
out has responded.
Fault code
You can call up a fault code if the Service/fault symbol is flashing
or continuously lit on the display.
Keep pressing "Menu" until the fault code
appears.
remedy
Notify a qualified contractor.
A permanently lit "service/
fault" symbol indicates that a
fault has occurred, but the heat
pump is heating nevertheless.
It is imperative that you notify a
qualified contractor quickly.
A flashing "service/fault" sym-
bol indicates that a fault has
occurred and the heat pump is
no longer heating.
No action required.
No action required. The com-
pressor restarts automatically
after the compressor lockout
time has elapsed. The compres-
sor lockout time lasts 20 min-
utes once the compressor has
been shut down. The symbol
stops flashing automatically.
No action required. The ap-
pliance continues the quick
heat-up process using the
heat pump. The symbol stops
flashing when the controller
re-enables the electric emer-
gency/booster heater. The
symbol extinguishes when the
temperature throughout the
DHW cylinder reaches the set
temperature of 65 °C.
Have a qualified contractor
check whether the controller of
the electric emergency/booster
heater is set correctly. The
controller must be turned fully
clockwise. Have a qualified
contractor check the high limit
safety cut-out.
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