Vexve AM20-W Benutzeranleitung Seite 43

Fault codes and the responses to them
Supply water sensor failure
· Push Enter (C) briefly to open the quick menu and check temperature T1.
· If the value is +99.9 degrees, there is no communication between the supply water sensor and the
motor unit.
- cable failure or connector disconnected » inspect
- if there is no mechanical failure » replace the supply water sensor
· If the supply water temperature is below zero (-01.4 C) = short-circuit in the sensor circuit.
- cable short-circuit » inspect the cable
- if there is no mechanical failure » the supply water sensor needs to be replaced
RF transmitter failure
· Take the room unit to the motor unit.
· Check that the RF transmitter is connected and that the cable is not damaged.
· Disconnect the power from the motor unit and then briefly remove one battery from the room unit.
· If the function is restored to normal when power is reconnected, return the room unit to its place after
pushing the setup button (D) and selecting "RF".
· Let the unit calculate the average radio communication value for a while. If the value is below 30%,
check if you can improve signal strength by relocating the room unit nearby.
· The location of the RF transmitter can also affect the range of radio communication significantly »
always locate the RF transmitter as high as possible and away from power cables.
If the above steps do not resolve the problem, the AM20-W unit can be returned to
factory default settings by following the instructions below:
· Unplug the motor power connector A
· Press the room unit set-up button D using the tip of a ballpoint pen, then select 'Defa' by turning the
rotary switch A
· Press the enter button C, and the text 'No' will appear in the upper corner of the display
· Turn the rotary switch A to change text 'No' to 'Yes' and then confirm by pressing the enter button C
· The room unit display should flash and the display now shows 'RU'
· Redo the installation in accordance with instructions starting from step 5 on page 45 of the quick
installation manual
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