ENGLISH
WWW.STIEBEL-ELTRON.COM WPL 10 ACS | 21
INSTALLATION
MAINTENANCE
The following table shows the meaning of the LEDs of the IWS II.
LED indication Meaning
Red LED flashes Single fault. Appliance stops and restarts after 10
minutes, and the LED extinguishes.
Red LED illuminates
More than 5 faults within 2 hours of operation.
The appliance is shut down permanently and only
restarts following a reset on the IWS. The internal
fault counter will then be returned to zero. The ap-
pliance can then be restarted after 10 minutes. The
LED extinguishes.
Green LED (centre)
flashes
The heat pump is initialising.
Green LED (centre) il-
luminates
The heat pump was initialised successfully and the
connection with the WPM 3 is active.
Faults indicated by the red LED:
- High pressure fault
- Low pressure fault
- Other fault and
- Hardware fault on the IWS (see fault list)
12.2 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.
12.3 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.
12.4 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 air routing. If the fan
comes into contact with this ice, noise develops.
How to remedy rhythmically scratching or grinding noises:
Check whether the condensate drain is free from obstruction.
Check whether the design output and temperature are set
correctly. Ice formation is particularly pronounced when
a high heating output is demanded at moderate outside
temperatures.
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.
To Next Page
Loading...
