STIEBEL ELTRON WWS 20 - 5 Cleaning, Care and Maintenance; 6 Troubleshooting

OPERATION
Cleaning, care and maintenance
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ENGLISH
4.9.2 Calling up operating data
To call up the operating data for your heat pump, proceed as
follows:
 Navigate to the "Call up operating data" menu level (see
chapter "Menu structure").
 Press the OK button.
You are given the option to call up the program version.
 To call up the program version, press the OK button. To
navigate instead to the operating data, press the Up/Down
buttons.
 You can call up the following operating data:
Parameter Description
Pro Program version
d01 Actual value sensor F1
d02 Actual value sensor F2
d03 Actual value sensor F3
d04 Actual value sensor F4
d11 Compressor hours run (0 - 9999)
d12 Compressor hours run (10.000+)
d13 Immersion heater hours run (0 - 9999)
d14 Immersion heater hours run (10.000+)
5. Cleaning, care and maintenance
WARNING Electrocution
- Only clean the exterior of the appliance.
- Never open the appliance.
- Do not insert objects through the grille into the in-
terior of the appliance.
- Never spray the appliance with water.
- Never spray water into the appliance.
!
WARNING Injury
Maintenance work, such as checking electrical safety,
must only be carried out by a qualified contractor.
- Use a damp cloth to clean the casing sections. Never use
abrasive or corrosive cleaning agents.
- Clean the air intake and discharge apertures every six
months. Cobwebs or other kinds of contamination can re-
strict the air supply to the appliance.
- Have the safety assembly and the evaporator checked regu-
larly by a qualified contractor.
- Check that the condensate drain is clear and remove any dirt.
6. Troubleshooting
Problem Cause Remedy
DHW temperature
too low
Water consumption
too high
Reduce consumption or switch on
immersion heater
DHW value set too low DHW value checking
Actual value F1 in-
correct
Checking sensor F1
Intake air temperature
too low (heating out-
put too low)
Switching on immersion heater
Circulation pump in
continuous mode
Check time switch, test temper-
ature controller and non-return
valve
Non-return valve
blocked
Clear non-return valve by tapping
gently
Heating slider open Closing heating slider
Defrosting active Wait 20minutes
Compressor
running, fan not
running
Start capacitor faulty Customer support notification
Winding damage Customer support notification
Compressor and
fan running with-
out heating the do-
mestic hot water
No air flow, evaporator
contaminated
Cleaning evaporator with water
Evaporator iced up Defrosting evaporator
Air lines blocked Cleaning air lines
Refrigerant shortage Customer support notification
Expansion valve does
not open
Customer support notification
Compressor not
running, fan run-
ning
Flow direction faulty Customer support notification
Compressor faulty Customer support notification
Constant water
discharge
Safety valve does not
close
Vent or replace
Cylinder faulty Closing supply line
Cylinder dripping Check seals, retighten if neces-
sary
Water discharges
only when appli-
ance is operating
Condensate
Condensate drain
blocked
Cleaning the condensate drain
Smell
No siphon installed in
condensate drain
Siphon installation
Water in the siphon Filling with water
Noise
Gurgling noise Water level in siphon too low, fill
with water
Splashing noise Condensate drain blocked, clean
Nothing on the
display
Power supply inter-
rupted
Checking power supply
Immersion heater
switched on, but
not heating
Superheating Safety thermostat acknowledge-
ment
Electrical connection
faulty
Qualified contractor to replace
the electrical connection