Appendix
0020253110_01 Operating and installation instructions
19
Symptom
Possible cause
Measure
No changes in the
display when the
rotary knob is turned
Software error
1. Take all the batteries out.
2. Insert the batteries in the battery compart-
ment, making sure that the poles are the
right way round.
The product is defect-
ive
▶
Replace the product.
No changes in the
display via the se-
lection buttons are
pressed
Software error
1. Take all the batteries out.
2. Insert the batteries in the battery compart-
ment, making sure that the poles are the
right way round.
The product is defect-
ive
▶
Replace the product.
Display view:
No RF
communication
No power supply to
the radio receiver unit
▶
Reconnect the power supply to the radio
receiver unit.
The remote control
is outside the radio
reception range
1. Take the remote control to the radio
receiver unit and see if the reception
strength increases.
2. If the reception strength is
≤
4, find a new
installation site for the remote control.
The product is defect-
ive
▶
Replace the product.
It is not possible to
switch to the installer
level
You do not know the
code for the installer
level
▶
Reset the remote control to the factory set-
tings (
→
Page 13).
