18 | WPL 10 www.stiebel-eltron.com
INSTALLATION
Troubleshooting
17. Troubleshooting
Note
Please observe the heat pump manager operating and
installation instructions.
Note
The following inspection instructions may only be carried
out by a qualified contractor.
If you cannot locate the fault using the heat pump manager, use
the controls on the IWS.
Open the control panel.
Read the following sections on troubleshooting and carry out
the instructions.
17.1 Controls on the IWS
The IWS helps you to troubleshoot if the fault cannot be identified
using the WPM.
26_03_01_0921_
1
2
1 LEDs
2 Reset button
Red LED (left)
Faults indicated by the LED:
- High pressure fault
- Low pressure fault
- Central fault
- Hardware fault on the IWS (see fault list, operating and in-
stallation instructions of the heat pump manager)
Fault Cause “ Remedy
The appliance stops and
restarts after the idle pe-
riod has expired. The red
LED flashes.
There is a heat pump
fault.
Check the fault message
on the WPM.
Find the solution in the
WPM instructions (fault
list). Reset the IWS.
Fault Cause “ Remedy
The appliance stops per-
manently. The red LED is
illuminated steadily.
Five faults have oc-
curred within two
hours of compressor
runtime.
Check the fault message
on the WPM. Find the
solution in the WPM in-
structions (fault list). Reset
the IWS.
Green LED (centre)
The LED flashes during initialisation, and illuminates constantly
after the BUS address has been assigned successfully. Connection
to the WPM has been established.
Green LED (right)
No function.
17.1.1 Reset button
If the IWS was not initialised successfully, you can reset it with this
reset button. Observe the "Reinitialising IWS" chapter in the heat
pump manager operating and installation instructions.
17.2 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.
Check whether the design output and temperature are set
correctly. Ice formation is particularly pronounced when
high heating output is called for 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.
18. Maintenance
We recommend that you perform an annual inspection (to es-
tablish the current condition of the system), and carry out any
maintenance as required (to return the system into its original
condition).
To Next Page
Loading...
Need help?
General
