Cleaning, Care And Maintenance; Troubleshooting - STIEBEL ELTRON WWS 20 Bedienung Und Installation

OPERATION

Cleaning, care and maintenance

4.9.2 Calling up operating data
To call up the operating data for your heat pump, proceed as
follows:
f Navigate to the "Call up operating data" menu level (see f
chapter "Menu structure").
f Press the OK button. f
You are given the option to call up the program version.
f To call up the program version, press the OK button. To f
navigate instead to the operating data, press the Up/Down
buttons.
f You can call up the following operating data: f
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.
www.stiebel-eltron.com
6.

Troubleshooting

Problem Cause
DHW temperature Water consumption
too low too high
DHW value set too low DHW value checking
Actual value F1 in-
correct
Intake air temperature
too low (heating out-
put too low)
Circulation pump in
continuous mode
Non-return valve
blocked
Heating slider open
Defrosting active
Compressor Start capacitor faulty
running, fan not
running
Winding damage
Compressor and No air flow, evaporator
fan running with- contaminated
out heating the do-
mestic hot water
Evaporator iced up
Air lines blocked
Refrigerant shortage
Expansion valve does
not open
Compressor not Flow direction faulty
running, fan run-
ning
Compressor faulty
Constant water Safety valve does not
discharge close
Cylinder faulty
Cylinder dripping
Water discharges Condensate
only when appli-
ance is operating
Condensate drain
blocked
Smell No siphon installed in
condensate drain
Water in the siphon
Noise Gurgling noise
Splashing noise
Nothing on the Power supply inter-
display rupted
Immersion heater Superheating
switched on, but
not heating
Electrical connection
faulty
Remedy
Reduce consumption or switch on
immersion heater
Checking sensor F1
Switching on immersion heater
Check time switch, test temper-
ature controller and non-return
valve
Clear non-return valve by tapping
gently
Closing heating slider
Wait 20 minutes
Customer support notification
Customer support notification
Cleaning evaporator with water
Defrosting evaporator
Cleaning air lines
Customer support notification
Customer support notification
Customer support notification
Customer support notification
Vent or replace
Closing supply line
Check seals, retighten if neces-
sary
Cleaning the condensate drain
Siphon installation
Filling with water
Water level in siphon too low, fill
with water
Condensate drain blocked, clean
Checking power supply
Safety thermostat acknowledge-
ment
Qualified contractor to replace
the electrical connection
WWS 20 | 47