INSTALLATION
Troubleshooting
22 | WPL 10 AC | WPL 10 ACS www.stiebel-eltron.com
14.2 Reset button
If the IWS was not initialised successfully, you can reset the set-
tings with this button.
For this also observe the chapter "Reinitialising IWS" in the
heat pump manager operating and installation instructions.
14.3 Resetting the high limit safety cut-out
The electric emergency/booster heater stops if the heating water
temperature exceeds 85 °C, for example on account of a low flow
rate.
Check whether the high limit safety cut-out has tripped.
Remove the cause of the fault.
26�03�01�1528
Reset the high limit safety cut-out by pressing the reset
button.
14.4 Fan noise
The heat pump draws heat from the outdoor air. This causes the
outdoor air to cool down. At outside temperatures of 0°C to 8°C,
the air may be cooled to below freezing point. If under these
conditions precipitation occurs in the form of rain or fog, ice may
form on the air grille, the fan blades or the airways. If the fan
comes into contact with this ice, noise develops.
How to remedy rhythmic scratching or grinding noises:
Check whether the condensate drain is clear of obstructions.
Carry out a manual defrost, repeatedly if required, until the
fan runs free again.
At outside temperatures above + 1°C, switch the appliance
off for around 1hour or switch it over to emergency mode.
After this, the ice should have melted.
Check whether the appliance is installed in line with the in-
stallation conditions.
If the noises occur frequently, notify customer support.
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